1090 lines
47 KiB
C++
1090 lines
47 KiB
C++
/*
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******************************************************************************
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* Copyright (C) 1996-2010, International Business Machines *
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* Corporation and others. All Rights Reserved. *
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******************************************************************************
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*/
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/**
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* \file
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* \brief C++ API: Collation Service.
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*/
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/**
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* File coll.h
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*
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* Created by: Helena Shih
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*
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* Modification History:
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*
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* Date Name Description
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* 02/5/97 aliu Modified createDefault to load collation data from
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* binary files when possible. Added related methods
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* createCollationFromFile, chopLocale, createPathName.
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* 02/11/97 aliu Added members addToCache, findInCache, and fgCache.
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* 02/12/97 aliu Modified to create objects from RuleBasedCollator cache.
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* Moved cache out of Collation class.
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* 02/13/97 aliu Moved several methods out of this class and into
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* RuleBasedCollator, with modifications. Modified
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* createDefault() to call new RuleBasedCollator(Locale&)
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* constructor. General clean up and documentation.
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* 02/20/97 helena Added clone, operator==, operator!=, operator=, copy
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* constructor and getDynamicClassID.
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* 03/25/97 helena Updated with platform independent data types.
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* 05/06/97 helena Added memory allocation error detection.
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* 06/20/97 helena Java class name change.
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* 09/03/97 helena Added createCollationKeyValues().
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* 02/10/98 damiba Added compare() with length as parameter.
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* 04/23/99 stephen Removed EDecompositionMode, merged with
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* Normalizer::EMode.
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* 11/02/99 helena Collator performance enhancements. Eliminates the
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* UnicodeString construction and special case for NO_OP.
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* 11/23/99 srl More performance enhancements. Inlining of
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* critical accessors.
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* 05/15/00 helena Added version information API.
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* 01/29/01 synwee Modified into a C++ wrapper which calls C apis
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* (ucoll.h).
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*/
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#ifndef COLL_H
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#define COLL_H
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#include "unicode/utypes.h"
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#if !UCONFIG_NO_COLLATION
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#include "unicode/uobject.h"
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#include "unicode/ucol.h"
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#include "unicode/normlzr.h"
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#include "unicode/locid.h"
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#include "unicode/uniset.h"
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#include "unicode/umisc.h"
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#include "unicode/uiter.h"
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#include "unicode/stringpiece.h"
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U_NAMESPACE_BEGIN
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class StringEnumeration;
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#if !UCONFIG_NO_SERVICE
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/**
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* @stable ICU 2.6
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*/
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class CollatorFactory;
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#endif
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/**
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* @stable ICU 2.0
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*/
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class CollationKey;
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/**
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* The <code>Collator</code> class performs locale-sensitive string
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* comparison.<br>
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* You use this class to build searching and sorting routines for natural
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* language text.<br>
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* <em>Important: </em>The ICU collation service has been reimplemented
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* in order to achieve better performance and UCA compliance.
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* For details, see the
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* <a href="http://source.icu-project.org/repos/icu/icuhtml/trunk/design/collation/ICU_collation_design.htm">
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* collation design document</a>.
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* <p>
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* <code>Collator</code> is an abstract base class. Subclasses implement
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* specific collation strategies. One subclass,
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* <code>RuleBasedCollator</code>, is currently provided and is applicable
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* to a wide set of languages. Other subclasses may be created to handle more
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* specialized needs.
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* <p>
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* Like other locale-sensitive classes, you can use the static factory method,
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* <code>createInstance</code>, to obtain the appropriate
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* <code>Collator</code> object for a given locale. You will only need to
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* look at the subclasses of <code>Collator</code> if you need to
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* understand the details of a particular collation strategy or if you need to
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* modify that strategy.
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* <p>
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* The following example shows how to compare two strings using the
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* <code>Collator</code> for the default locale.
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* \htmlonly<blockquote>\endhtmlonly
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* <pre>
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* \code
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* // Compare two strings in the default locale
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* UErrorCode success = U_ZERO_ERROR;
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* Collator* myCollator = Collator::createInstance(success);
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* if (myCollator->compare("abc", "ABC") < 0)
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* cout << "abc is less than ABC" << endl;
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* else
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* cout << "abc is greater than or equal to ABC" << endl;
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* \endcode
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* </pre>
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* \htmlonly</blockquote>\endhtmlonly
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* <p>
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* You can set a <code>Collator</code>'s <em>strength</em> property to
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* determine the level of difference considered significant in comparisons.
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* Five strengths are provided: <code>PRIMARY</code>, <code>SECONDARY</code>,
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* <code>TERTIARY</code>, <code>QUATERNARY</code> and <code>IDENTICAL</code>.
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* The exact assignment of strengths to language features is locale dependant.
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* For example, in Czech, "e" and "f" are considered primary differences,
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* while "e" and "\u00EA" are secondary differences, "e" and "E" are tertiary
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* differences and "e" and "e" are identical. The following shows how both case
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* and accents could be ignored for US English.
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* \htmlonly<blockquote>\endhtmlonly
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* <pre>
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* \code
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* //Get the Collator for US English and set its strength to PRIMARY
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* UErrorCode success = U_ZERO_ERROR;
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* Collator* usCollator = Collator::createInstance(Locale::US, success);
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* usCollator->setStrength(Collator::PRIMARY);
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* if (usCollator->compare("abc", "ABC") == 0)
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* cout << "'abc' and 'ABC' strings are equivalent with strength PRIMARY" << endl;
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* \endcode
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* </pre>
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* \htmlonly</blockquote>\endhtmlonly
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* <p>
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* For comparing strings exactly once, the <code>compare</code> method
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* provides the best performance. When sorting a list of strings however, it
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* is generally necessary to compare each string multiple times. In this case,
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* sort keys provide better performance. The <code>getSortKey</code> methods
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* convert a string to a series of bytes that can be compared bitwise against
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* other sort keys using <code>strcmp()</code>. Sort keys are written as
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* zero-terminated byte strings. They consist of several substrings, one for
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* each collation strength level, that are delimited by 0x01 bytes.
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* If the string code points are appended for UCOL_IDENTICAL, then they are
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* processed for correct code point order comparison and may contain 0x01
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* bytes but not zero bytes.
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* </p>
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* <p>
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* An older set of APIs returns a <code>CollationKey</code> object that wraps
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* the sort key bytes instead of returning the bytes themselves.
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* Its use is deprecated, but it is still available for compatibility with
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* Java.
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* </p>
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* <p>
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* <strong>Note:</strong> <code>Collator</code>s with different Locale,
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* and CollationStrength settings will return different sort
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* orders for the same set of strings. Locales have specific collation rules,
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* and the way in which secondary and tertiary differences are taken into
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* account, for example, will result in a different sorting order for same
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* strings.
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* </p>
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* @see RuleBasedCollator
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* @see CollationKey
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* @see CollationElementIterator
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* @see Locale
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* @see Normalizer
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* @version 2.0 11/15/01
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*/
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class U_I18N_API Collator : public UObject {
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public:
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// Collator public enums -----------------------------------------------
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/**
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* Base letter represents a primary difference. Set comparison level to
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* PRIMARY to ignore secondary and tertiary differences.<br>
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* Use this to set the strength of a Collator object.<br>
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* Example of primary difference, "abc" < "abd"
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*
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* Diacritical differences on the same base letter represent a secondary
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* difference. Set comparison level to SECONDARY to ignore tertiary
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* differences. Use this to set the strength of a Collator object.<br>
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* Example of secondary difference, "ä" >> "a".
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*
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* Uppercase and lowercase versions of the same character represents a
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* tertiary difference. Set comparison level to TERTIARY to include all
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* comparison differences. Use this to set the strength of a Collator
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* object.<br>
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* Example of tertiary difference, "abc" <<< "ABC".
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*
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* Two characters are considered "identical" when they have the same unicode
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* spellings.<br>
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* For example, "ä" == "ä".
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*
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* UCollationStrength is also used to determine the strength of sort keys
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* generated from Collator objects.
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* @stable ICU 2.0
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*/
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enum ECollationStrength
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{
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PRIMARY = 0,
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SECONDARY = 1,
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TERTIARY = 2,
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QUATERNARY = 3,
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IDENTICAL = 15
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};
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/**
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* LESS is returned if source string is compared to be less than target
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* string in the compare() method.
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* EQUAL is returned if source string is compared to be equal to target
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* string in the compare() method.
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* GREATER is returned if source string is compared to be greater than
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* target string in the compare() method.
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* @see Collator#compare
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* @deprecated ICU 2.6. Use C enum UCollationResult defined in ucol.h
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*/
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enum EComparisonResult
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{
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LESS = -1,
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EQUAL = 0,
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GREATER = 1
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};
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// Collator public destructor -----------------------------------------
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/**
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* Destructor
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* @stable ICU 2.0
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*/
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virtual ~Collator();
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// Collator public methods --------------------------------------------
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/**
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* Returns true if "other" is the same as "this"
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* @param other Collator object to be compared
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* @return true if other is the same as this.
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* @stable ICU 2.0
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*/
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virtual UBool operator==(const Collator& other) const;
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/**
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* Returns true if "other" is not the same as "this".
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* @param other Collator object to be compared
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* @return true if other is not the same as this.
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* @stable ICU 2.0
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*/
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virtual UBool operator!=(const Collator& other) const;
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/**
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* Makes a shallow copy of the current object.
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* @return a copy of this object
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* @stable ICU 2.0
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*/
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virtual Collator* clone(void) const = 0;
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/**
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* Creates the Collator object for the current default locale.
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* The default locale is determined by Locale::getDefault.
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* The UErrorCode& err parameter is used to return status information to the user.
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* To check whether the construction succeeded or not, you should check the
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* value of U_SUCCESS(err). If you wish more detailed information, you can
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* check for informational error results which still indicate success.
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* U_USING_FALLBACK_ERROR indicates that a fall back locale was used. For
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* example, 'de_CH' was requested, but nothing was found there, so 'de' was
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* used. U_USING_DEFAULT_ERROR indicates that the default locale data was
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* used; neither the requested locale nor any of its fall back locales
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* could be found.
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* The caller owns the returned object and is responsible for deleting it.
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*
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* @param err the error code status.
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* @return the collation object of the default locale.(for example, en_US)
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* @see Locale#getDefault
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* @stable ICU 2.0
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*/
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static Collator* U_EXPORT2 createInstance(UErrorCode& err);
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/**
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* Gets the table-based collation object for the desired locale. The
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* resource of the desired locale will be loaded by ResourceLoader.
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* Locale::ENGLISH is the base collation table and all other languages are
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* built on top of it with additional language-specific modifications.
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* The UErrorCode& err parameter is used to return status information to the user.
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* To check whether the construction succeeded or not, you should check
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* the value of U_SUCCESS(err). If you wish more detailed information, you
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* can check for informational error results which still indicate success.
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* U_USING_FALLBACK_ERROR indicates that a fall back locale was used. For
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* example, 'de_CH' was requested, but nothing was found there, so 'de' was
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* used. U_USING_DEFAULT_ERROR indicates that the default locale data was
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* used; neither the requested locale nor any of its fall back locales
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* could be found.
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* The caller owns the returned object and is responsible for deleting it.
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* @param loc The locale ID for which to open a collator.
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* @param err the error code status.
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* @return the created table-based collation object based on the desired
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* locale.
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* @see Locale
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* @see ResourceLoader
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* @stable ICU 2.2
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*/
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static Collator* U_EXPORT2 createInstance(const Locale& loc, UErrorCode& err);
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#ifdef U_USE_COLLATION_OBSOLETE_2_6
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/**
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* Create a Collator with a specific version.
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* This is the same as createInstance(loc, err) except that getVersion() of
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* the returned object is guaranteed to be the same as the version
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* parameter.
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* This is designed to be used to open the same collator for a given
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* locale even when ICU is updated.
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* The same locale and version guarantees the same sort keys and
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* comparison results.
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* <p>
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* Note: this API will be removed in a future release. Use
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* <tt>createInstance(const Locale&, UErrorCode&) instead.</tt></p>
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*
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* @param loc The locale ID for which to open a collator.
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* @param version The requested collator version.
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* @param err A reference to a UErrorCode,
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* must not indicate a failure before calling this function.
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* @return A pointer to a Collator, or 0 if an error occurred
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* or a collator with the requested version is not available.
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*
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* @see getVersion
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* @obsolete ICU 2.6
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*/
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static Collator *createInstance(const Locale &loc, UVersionInfo version, UErrorCode &err);
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#endif
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/**
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* The comparison function compares the character data stored in two
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* different strings. Returns information about whether a string is less
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* than, greater than or equal to another string.
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* @param source the source string to be compared with.
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* @param target the string that is to be compared with the source string.
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* @return Returns a byte value. GREATER if source is greater
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* than target; EQUAL if source is equal to target; LESS if source is less
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* than target
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* @deprecated ICU 2.6 use the overload with UErrorCode &
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*/
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virtual EComparisonResult compare(const UnicodeString& source,
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const UnicodeString& target) const;
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/**
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* The comparison function compares the character data stored in two
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* different strings. Returns information about whether a string is less
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* than, greater than or equal to another string.
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* @param source the source string to be compared with.
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* @param target the string that is to be compared with the source string.
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* @param status possible error code
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* @return Returns an enum value. UCOL_GREATER if source is greater
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* than target; UCOL_EQUAL if source is equal to target; UCOL_LESS if source is less
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* than target
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* @stable ICU 2.6
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*/
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virtual UCollationResult compare(const UnicodeString& source,
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const UnicodeString& target,
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UErrorCode &status) const = 0;
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/**
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* Does the same thing as compare but limits the comparison to a specified
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* length
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* @param source the source string to be compared with.
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* @param target the string that is to be compared with the source string.
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* @param length the length the comparison is limited to
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* @return Returns a byte value. GREATER if source (up to the specified
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* length) is greater than target; EQUAL if source (up to specified
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* length) is equal to target; LESS if source (up to the specified
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* length) is less than target.
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* @deprecated ICU 2.6 use the overload with UErrorCode &
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*/
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virtual EComparisonResult compare(const UnicodeString& source,
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const UnicodeString& target,
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int32_t length) const;
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/**
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* Does the same thing as compare but limits the comparison to a specified
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* length
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* @param source the source string to be compared with.
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* @param target the string that is to be compared with the source string.
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* @param length the length the comparison is limited to
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* @param status possible error code
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* @return Returns an enum value. UCOL_GREATER if source (up to the specified
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* length) is greater than target; UCOL_EQUAL if source (up to specified
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* length) is equal to target; UCOL_LESS if source (up to the specified
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* length) is less than target.
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* @stable ICU 2.6
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*/
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virtual UCollationResult compare(const UnicodeString& source,
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const UnicodeString& target,
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int32_t length,
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UErrorCode &status) const = 0;
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/**
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* The comparison function compares the character data stored in two
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* different string arrays. Returns information about whether a string array
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* is less than, greater than or equal to another string array.
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* @param source the source string array to be compared with.
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* @param sourceLength the length of the source string array. If this value
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* is equal to -1, the string array is null-terminated.
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* @param target the string that is to be compared with the source string.
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* @param targetLength the length of the target string array. If this value
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* is equal to -1, the string array is null-terminated.
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* @return Returns a byte value. GREATER if source is greater than target;
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* EQUAL if source is equal to target; LESS if source is less than
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* target
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* @deprecated ICU 2.6 use the overload with UErrorCode &
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*/
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virtual EComparisonResult compare(const UChar* source, int32_t sourceLength,
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const UChar* target, int32_t targetLength)
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const;
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/**
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* The comparison function compares the character data stored in two
|
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* different string arrays. Returns information about whether a string array
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* is less than, greater than or equal to another string array.
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* @param source the source string array to be compared with.
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* @param sourceLength the length of the source string array. If this value
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* is equal to -1, the string array is null-terminated.
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* @param target the string that is to be compared with the source string.
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* @param targetLength the length of the target string array. If this value
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* is equal to -1, the string array is null-terminated.
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* @param status possible error code
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* @return Returns an enum value. UCOL_GREATER if source is greater
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* than target; UCOL_EQUAL if source is equal to target; UCOL_LESS if source is less
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* than target
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* @stable ICU 2.6
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*/
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virtual UCollationResult compare(const UChar* source, int32_t sourceLength,
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const UChar* target, int32_t targetLength,
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UErrorCode &status) const = 0;
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/**
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* Compares two strings using the Collator.
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* Returns whether the first one compares less than/equal to/greater than
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* the second one.
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* This version takes UCharIterator input.
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* @param sIter the first ("source") string iterator
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* @param tIter the second ("target") string iterator
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* @param status ICU status
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* @return UCOL_LESS, UCOL_EQUAL or UCOL_GREATER
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* @stable ICU 4.2
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*/
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virtual UCollationResult compare(UCharIterator &sIter,
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UCharIterator &tIter,
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UErrorCode &status) const;
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/**
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* Compares two UTF-8 strings using the Collator.
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* Returns whether the first one compares less than/equal to/greater than
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* the second one.
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* This version takes UTF-8 input.
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* Note that a StringPiece can be implicitly constructed
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* from a std::string or a NUL-terminated const char * string.
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* @param source the first UTF-8 string
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* @param target the second UTF-8 string
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* @param status ICU status
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* @return UCOL_LESS, UCOL_EQUAL or UCOL_GREATER
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* @stable ICU 4.2
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*/
|
|
virtual UCollationResult compareUTF8(const StringPiece &source,
|
|
const StringPiece &target,
|
|
UErrorCode &status) const;
|
|
|
|
/**
|
|
* Transforms the string into a series of characters that can be compared
|
|
* with CollationKey::compareTo. It is not possible to restore the original
|
|
* string from the chars in the sort key. The generated sort key handles
|
|
* only a limited number of ignorable characters.
|
|
* <p>Use CollationKey::equals or CollationKey::compare to compare the
|
|
* generated sort keys.
|
|
* If the source string is null, a null collation key will be returned.
|
|
* @param source the source string to be transformed into a sort key.
|
|
* @param key the collation key to be filled in
|
|
* @param status the error code status.
|
|
* @return the collation key of the string based on the collation rules.
|
|
* @see CollationKey#compare
|
|
* @deprecated ICU 2.8 Use getSortKey(...) instead
|
|
*/
|
|
virtual CollationKey& getCollationKey(const UnicodeString& source,
|
|
CollationKey& key,
|
|
UErrorCode& status) const = 0;
|
|
|
|
/**
|
|
* Transforms the string into a series of characters that can be compared
|
|
* with CollationKey::compareTo. It is not possible to restore the original
|
|
* string from the chars in the sort key. The generated sort key handles
|
|
* only a limited number of ignorable characters.
|
|
* <p>Use CollationKey::equals or CollationKey::compare to compare the
|
|
* generated sort keys.
|
|
* <p>If the source string is null, a null collation key will be returned.
|
|
* @param source the source string to be transformed into a sort key.
|
|
* @param sourceLength length of the collation key
|
|
* @param key the collation key to be filled in
|
|
* @param status the error code status.
|
|
* @return the collation key of the string based on the collation rules.
|
|
* @see CollationKey#compare
|
|
* @deprecated ICU 2.8 Use getSortKey(...) instead
|
|
*/
|
|
virtual CollationKey& getCollationKey(const UChar*source,
|
|
int32_t sourceLength,
|
|
CollationKey& key,
|
|
UErrorCode& status) const = 0;
|
|
/**
|
|
* Generates the hash code for the collation object
|
|
* @stable ICU 2.0
|
|
*/
|
|
virtual int32_t hashCode(void) const = 0;
|
|
|
|
/**
|
|
* Gets the locale of the Collator
|
|
*
|
|
* @param type can be either requested, valid or actual locale. For more
|
|
* information see the definition of ULocDataLocaleType in
|
|
* uloc.h
|
|
* @param status the error code status.
|
|
* @return locale where the collation data lives. If the collator
|
|
* was instantiated from rules, locale is empty.
|
|
* @deprecated ICU 2.8 This API is under consideration for revision
|
|
* in ICU 3.0.
|
|
*/
|
|
virtual const Locale getLocale(ULocDataLocaleType type, UErrorCode& status) const = 0;
|
|
|
|
/**
|
|
* Convenience method for comparing two strings based on the collation rules.
|
|
* @param source the source string to be compared with.
|
|
* @param target the target string to be compared with.
|
|
* @return true if the first string is greater than the second one,
|
|
* according to the collation rules. false, otherwise.
|
|
* @see Collator#compare
|
|
* @stable ICU 2.0
|
|
*/
|
|
UBool greater(const UnicodeString& source, const UnicodeString& target)
|
|
const;
|
|
|
|
/**
|
|
* Convenience method for comparing two strings based on the collation rules.
|
|
* @param source the source string to be compared with.
|
|
* @param target the target string to be compared with.
|
|
* @return true if the first string is greater than or equal to the second
|
|
* one, according to the collation rules. false, otherwise.
|
|
* @see Collator#compare
|
|
* @stable ICU 2.0
|
|
*/
|
|
UBool greaterOrEqual(const UnicodeString& source,
|
|
const UnicodeString& target) const;
|
|
|
|
/**
|
|
* Convenience method for comparing two strings based on the collation rules.
|
|
* @param source the source string to be compared with.
|
|
* @param target the target string to be compared with.
|
|
* @return true if the strings are equal according to the collation rules.
|
|
* false, otherwise.
|
|
* @see Collator#compare
|
|
* @stable ICU 2.0
|
|
*/
|
|
UBool equals(const UnicodeString& source, const UnicodeString& target) const;
|
|
|
|
/**
|
|
* Determines the minimum strength that will be use in comparison or
|
|
* transformation.
|
|
* <p>E.g. with strength == SECONDARY, the tertiary difference is ignored
|
|
* <p>E.g. with strength == PRIMARY, the secondary and tertiary difference
|
|
* are ignored.
|
|
* @return the current comparison level.
|
|
* @see Collator#setStrength
|
|
* @deprecated ICU 2.6 Use getAttribute(UCOL_STRENGTH...) instead
|
|
*/
|
|
virtual ECollationStrength getStrength(void) const = 0;
|
|
|
|
/**
|
|
* Sets the minimum strength to be used in comparison or transformation.
|
|
* <p>Example of use:
|
|
* <pre>
|
|
* \code
|
|
* UErrorCode status = U_ZERO_ERROR;
|
|
* Collator*myCollation = Collator::createInstance(Locale::US, status);
|
|
* if (U_FAILURE(status)) return;
|
|
* myCollation->setStrength(Collator::PRIMARY);
|
|
* // result will be "abc" == "ABC"
|
|
* // tertiary differences will be ignored
|
|
* Collator::ComparisonResult result = myCollation->compare("abc", "ABC");
|
|
* \endcode
|
|
* </pre>
|
|
* @see Collator#getStrength
|
|
* @param newStrength the new comparison level.
|
|
* @deprecated ICU 2.6 Use setAttribute(UCOL_STRENGTH...) instead
|
|
*/
|
|
virtual void setStrength(ECollationStrength newStrength) = 0;
|
|
|
|
/**
|
|
* Get name of the object for the desired Locale, in the desired langauge
|
|
* @param objectLocale must be from getAvailableLocales
|
|
* @param displayLocale specifies the desired locale for output
|
|
* @param name the fill-in parameter of the return value
|
|
* @return display-able name of the object for the object locale in the
|
|
* desired language
|
|
* @stable ICU 2.0
|
|
*/
|
|
static UnicodeString& U_EXPORT2 getDisplayName(const Locale& objectLocale,
|
|
const Locale& displayLocale,
|
|
UnicodeString& name);
|
|
|
|
/**
|
|
* Get name of the object for the desired Locale, in the langauge of the
|
|
* default locale.
|
|
* @param objectLocale must be from getAvailableLocales
|
|
* @param name the fill-in parameter of the return value
|
|
* @return name of the object for the desired locale in the default language
|
|
* @stable ICU 2.0
|
|
*/
|
|
static UnicodeString& U_EXPORT2 getDisplayName(const Locale& objectLocale,
|
|
UnicodeString& name);
|
|
|
|
/**
|
|
* Get the set of Locales for which Collations are installed.
|
|
*
|
|
* <p>Note this does not include locales supported by registered collators.
|
|
* If collators might have been registered, use the overload of getAvailableLocales
|
|
* that returns a StringEnumeration.</p>
|
|
*
|
|
* @param count the output parameter of number of elements in the locale list
|
|
* @return the list of available locales for which collations are installed
|
|
* @stable ICU 2.0
|
|
*/
|
|
static const Locale* U_EXPORT2 getAvailableLocales(int32_t& count);
|
|
|
|
/**
|
|
* Return a StringEnumeration over the locales available at the time of the call,
|
|
* including registered locales. If a severe error occurs (such as out of memory
|
|
* condition) this will return null. If there is no locale data, an empty enumeration
|
|
* will be returned.
|
|
* @return a StringEnumeration over the locales available at the time of the call
|
|
* @stable ICU 2.6
|
|
*/
|
|
static StringEnumeration* U_EXPORT2 getAvailableLocales(void);
|
|
|
|
/**
|
|
* Create a string enumerator of all possible keywords that are relevant to
|
|
* collation. At this point, the only recognized keyword for this
|
|
* service is "collation".
|
|
* @param status input-output error code
|
|
* @return a string enumeration over locale strings. The caller is
|
|
* responsible for closing the result.
|
|
* @stable ICU 3.0
|
|
*/
|
|
static StringEnumeration* U_EXPORT2 getKeywords(UErrorCode& status);
|
|
|
|
/**
|
|
* Given a keyword, create a string enumeration of all values
|
|
* for that keyword that are currently in use.
|
|
* @param keyword a particular keyword as enumerated by
|
|
* ucol_getKeywords. If any other keyword is passed in, status is set
|
|
* to U_ILLEGAL_ARGUMENT_ERROR.
|
|
* @param status input-output error code
|
|
* @return a string enumeration over collation keyword values, or NULL
|
|
* upon error. The caller is responsible for deleting the result.
|
|
* @stable ICU 3.0
|
|
*/
|
|
static StringEnumeration* U_EXPORT2 getKeywordValues(const char *keyword, UErrorCode& status);
|
|
|
|
/**
|
|
* Given a key and a locale, returns an array of string values in a preferred
|
|
* order that would make a difference. These are all and only those values where
|
|
* the open (creation) of the service with the locale formed from the input locale
|
|
* plus input keyword and that value has different behavior than creation with the
|
|
* input locale alone.
|
|
* @param keyword one of the keys supported by this service. For now, only
|
|
* "collation" is supported.
|
|
* @param locale the locale
|
|
* @param commonlyUsed if set to true it will return only commonly used values
|
|
* with the given locale in preferred order. Otherwise,
|
|
* it will return all the available values for the locale.
|
|
* @param status ICU status
|
|
* @return a string enumeration over keyword values for the given key and the locale.
|
|
* @stable ICU 4.2
|
|
*/
|
|
static StringEnumeration* U_EXPORT2 getKeywordValuesForLocale(const char* keyword, const Locale& locale,
|
|
UBool commonlyUsed, UErrorCode& status);
|
|
|
|
/**
|
|
* Return the functionally equivalent locale for the given
|
|
* requested locale, with respect to given keyword, for the
|
|
* collation service. If two locales return the same result, then
|
|
* collators instantiated for these locales will behave
|
|
* equivalently. The converse is not always true; two collators
|
|
* may in fact be equivalent, but return different results, due to
|
|
* internal details. The return result has no other meaning than
|
|
* that stated above, and implies nothing as to the relationship
|
|
* between the two locales. This is intended for use by
|
|
* applications who wish to cache collators, or otherwise reuse
|
|
* collators when possible. The functional equivalent may change
|
|
* over time. For more information, please see the <a
|
|
* href="http://icu-project.org/userguide/locale.html#services">
|
|
* Locales and Services</a> section of the ICU User Guide.
|
|
* @param keyword a particular keyword as enumerated by
|
|
* ucol_getKeywords.
|
|
* @param locale the requested locale
|
|
* @param isAvailable reference to a fillin parameter that
|
|
* indicates whether the requested locale was 'available' to the
|
|
* collation service. A locale is defined as 'available' if it
|
|
* physically exists within the collation locale data.
|
|
* @param status reference to input-output error code
|
|
* @return the functionally equivalent collation locale, or the root
|
|
* locale upon error.
|
|
* @stable ICU 3.0
|
|
*/
|
|
static Locale U_EXPORT2 getFunctionalEquivalent(const char* keyword, const Locale& locale,
|
|
UBool& isAvailable, UErrorCode& status);
|
|
|
|
#if !UCONFIG_NO_SERVICE
|
|
/**
|
|
* Register a new Collator. The collator will be adopted.
|
|
* @param toAdopt the Collator instance to be adopted
|
|
* @param locale the locale with which the collator will be associated
|
|
* @param status the in/out status code, no special meanings are assigned
|
|
* @return a registry key that can be used to unregister this collator
|
|
* @stable ICU 2.6
|
|
*/
|
|
static URegistryKey U_EXPORT2 registerInstance(Collator* toAdopt, const Locale& locale, UErrorCode& status);
|
|
|
|
/**
|
|
* Register a new CollatorFactory. The factory will be adopted.
|
|
* @param toAdopt the CollatorFactory instance to be adopted
|
|
* @param status the in/out status code, no special meanings are assigned
|
|
* @return a registry key that can be used to unregister this collator
|
|
* @stable ICU 2.6
|
|
*/
|
|
static URegistryKey U_EXPORT2 registerFactory(CollatorFactory* toAdopt, UErrorCode& status);
|
|
|
|
/**
|
|
* Unregister a previously-registered Collator or CollatorFactory
|
|
* using the key returned from the register call. Key becomes
|
|
* invalid after a successful call and should not be used again.
|
|
* The object corresponding to the key will be deleted.
|
|
* @param key the registry key returned by a previous call to registerInstance
|
|
* @param status the in/out status code, no special meanings are assigned
|
|
* @return TRUE if the collator for the key was successfully unregistered
|
|
* @stable ICU 2.6
|
|
*/
|
|
static UBool U_EXPORT2 unregister(URegistryKey key, UErrorCode& status);
|
|
#endif /* UCONFIG_NO_SERVICE */
|
|
|
|
/**
|
|
* Gets the version information for a Collator.
|
|
* @param info the version # information, the result will be filled in
|
|
* @stable ICU 2.0
|
|
*/
|
|
virtual void getVersion(UVersionInfo info) const = 0;
|
|
|
|
/**
|
|
* Returns a unique class ID POLYMORPHICALLY. Pure virtual method.
|
|
* This method is to implement a simple version of RTTI, since not all C++
|
|
* compilers support genuine RTTI. Polymorphic operator==() and clone()
|
|
* methods call this method.
|
|
* @return The class ID for this object. All objects of a given class have
|
|
* the same class ID. Objects of other classes have different class
|
|
* IDs.
|
|
* @stable ICU 2.0
|
|
*/
|
|
virtual UClassID getDynamicClassID(void) const = 0;
|
|
|
|
/**
|
|
* Universal attribute setter
|
|
* @param attr attribute type
|
|
* @param value attribute value
|
|
* @param status to indicate whether the operation went on smoothly or
|
|
* there were errors
|
|
* @stable ICU 2.2
|
|
*/
|
|
virtual void setAttribute(UColAttribute attr, UColAttributeValue value,
|
|
UErrorCode &status) = 0;
|
|
|
|
/**
|
|
* Universal attribute getter
|
|
* @param attr attribute type
|
|
* @param status to indicate whether the operation went on smoothly or
|
|
* there were errors
|
|
* @return attribute value
|
|
* @stable ICU 2.2
|
|
*/
|
|
virtual UColAttributeValue getAttribute(UColAttribute attr,
|
|
UErrorCode &status) = 0;
|
|
|
|
/**
|
|
* Sets the variable top to a collation element value of a string supplied.
|
|
* @param varTop one or more (if contraction) UChars to which the variable top should be set
|
|
* @param len length of variable top string. If -1 it is considered to be zero terminated.
|
|
* @param status error code. If error code is set, the return value is undefined. Errors set by this function are: <br>
|
|
* U_CE_NOT_FOUND_ERROR if more than one character was passed and there is no such a contraction<br>
|
|
* U_PRIMARY_TOO_LONG_ERROR if the primary for the variable top has more than two bytes
|
|
* @return a 32 bit value containing the value of the variable top in upper 16 bits. Lower 16 bits are undefined
|
|
* @stable ICU 2.0
|
|
*/
|
|
virtual uint32_t setVariableTop(const UChar *varTop, int32_t len, UErrorCode &status) = 0;
|
|
|
|
/**
|
|
* Sets the variable top to a collation element value of a string supplied.
|
|
* @param varTop an UnicodeString size 1 or more (if contraction) of UChars to which the variable top should be set
|
|
* @param status error code. If error code is set, the return value is undefined. Errors set by this function are: <br>
|
|
* U_CE_NOT_FOUND_ERROR if more than one character was passed and there is no such a contraction<br>
|
|
* U_PRIMARY_TOO_LONG_ERROR if the primary for the variable top has more than two bytes
|
|
* @return a 32 bit value containing the value of the variable top in upper 16 bits. Lower 16 bits are undefined
|
|
* @stable ICU 2.0
|
|
*/
|
|
virtual uint32_t setVariableTop(const UnicodeString varTop, UErrorCode &status) = 0;
|
|
|
|
/**
|
|
* Sets the variable top to a collation element value supplied. Variable top is set to the upper 16 bits.
|
|
* Lower 16 bits are ignored.
|
|
* @param varTop CE value, as returned by setVariableTop or ucol)getVariableTop
|
|
* @param status error code (not changed by function)
|
|
* @stable ICU 2.0
|
|
*/
|
|
virtual void setVariableTop(const uint32_t varTop, UErrorCode &status) = 0;
|
|
|
|
/**
|
|
* Gets the variable top value of a Collator.
|
|
* Lower 16 bits are undefined and should be ignored.
|
|
* @param status error code (not changed by function). If error code is set, the return value is undefined.
|
|
* @stable ICU 2.0
|
|
*/
|
|
virtual uint32_t getVariableTop(UErrorCode &status) const = 0;
|
|
|
|
/**
|
|
* Get an UnicodeSet that contains all the characters and sequences
|
|
* tailored in this collator.
|
|
* @param status error code of the operation
|
|
* @return a pointer to a UnicodeSet object containing all the
|
|
* code points and sequences that may sort differently than
|
|
* in the UCA. The object must be disposed of by using delete
|
|
* @stable ICU 2.4
|
|
*/
|
|
virtual UnicodeSet *getTailoredSet(UErrorCode &status) const;
|
|
|
|
|
|
/**
|
|
* Thread safe cloning operation
|
|
* @return pointer to the new clone, user should remove it.
|
|
* @stable ICU 2.2
|
|
*/
|
|
virtual Collator* safeClone(void) = 0;
|
|
|
|
/**
|
|
* Get the sort key as an array of bytes from an UnicodeString.
|
|
* Sort key byte arrays are zero-terminated and can be compared using
|
|
* strcmp().
|
|
* @param source string to be processed.
|
|
* @param result buffer to store result in. If NULL, number of bytes needed
|
|
* will be returned.
|
|
* @param resultLength length of the result buffer. If if not enough the
|
|
* buffer will be filled to capacity.
|
|
* @return Number of bytes needed for storing the sort key
|
|
* @stable ICU 2.2
|
|
*/
|
|
virtual int32_t getSortKey(const UnicodeString& source,
|
|
uint8_t* result,
|
|
int32_t resultLength) const = 0;
|
|
|
|
/**
|
|
* Get the sort key as an array of bytes from an UChar buffer.
|
|
* Sort key byte arrays are zero-terminated and can be compared using
|
|
* strcmp().
|
|
* @param source string to be processed.
|
|
* @param sourceLength length of string to be processed.
|
|
* If -1, the string is 0 terminated and length will be decided by the
|
|
* function.
|
|
* @param result buffer to store result in. If NULL, number of bytes needed
|
|
* will be returned.
|
|
* @param resultLength length of the result buffer. If if not enough the
|
|
* buffer will be filled to capacity.
|
|
* @return Number of bytes needed for storing the sort key
|
|
* @stable ICU 2.2
|
|
*/
|
|
virtual int32_t getSortKey(const UChar*source, int32_t sourceLength,
|
|
uint8_t*result, int32_t resultLength) const = 0;
|
|
|
|
/**
|
|
* Produce a bound for a given sortkey and a number of levels.
|
|
* Return value is always the number of bytes needed, regardless of
|
|
* whether the result buffer was big enough or even valid.<br>
|
|
* Resulting bounds can be used to produce a range of strings that are
|
|
* between upper and lower bounds. For example, if bounds are produced
|
|
* for a sortkey of string "smith", strings between upper and lower
|
|
* bounds with one level would include "Smith", "SMITH", "sMiTh".<br>
|
|
* There are two upper bounds that can be produced. If UCOL_BOUND_UPPER
|
|
* is produced, strings matched would be as above. However, if bound
|
|
* produced using UCOL_BOUND_UPPER_LONG is used, the above example will
|
|
* also match "Smithsonian" and similar.<br>
|
|
* For more on usage, see example in cintltst/capitst.c in procedure
|
|
* TestBounds.
|
|
* Sort keys may be compared using <TT>strcmp</TT>.
|
|
* @param source The source sortkey.
|
|
* @param sourceLength The length of source, or -1 if null-terminated.
|
|
* (If an unmodified sortkey is passed, it is always null
|
|
* terminated).
|
|
* @param boundType Type of bound required. It can be UCOL_BOUND_LOWER, which
|
|
* produces a lower inclusive bound, UCOL_BOUND_UPPER, that
|
|
* produces upper bound that matches strings of the same length
|
|
* or UCOL_BOUND_UPPER_LONG that matches strings that have the
|
|
* same starting substring as the source string.
|
|
* @param noOfLevels Number of levels required in the resulting bound (for most
|
|
* uses, the recommended value is 1). See users guide for
|
|
* explanation on number of levels a sortkey can have.
|
|
* @param result A pointer to a buffer to receive the resulting sortkey.
|
|
* @param resultLength The maximum size of result.
|
|
* @param status Used for returning error code if something went wrong. If the
|
|
* number of levels requested is higher than the number of levels
|
|
* in the source key, a warning (U_SORT_KEY_TOO_SHORT_WARNING) is
|
|
* issued.
|
|
* @return The size needed to fully store the bound.
|
|
* @see ucol_keyHashCode
|
|
* @stable ICU 2.1
|
|
*/
|
|
static int32_t U_EXPORT2 getBound(const uint8_t *source,
|
|
int32_t sourceLength,
|
|
UColBoundMode boundType,
|
|
uint32_t noOfLevels,
|
|
uint8_t *result,
|
|
int32_t resultLength,
|
|
UErrorCode &status);
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protected:
|
|
|
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// Collator protected constructors -------------------------------------
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|
|
|
/**
|
|
* Default constructor.
|
|
* Constructor is different from the old default Collator constructor.
|
|
* The task for determing the default collation strength and normalization
|
|
* mode is left to the child class.
|
|
* @stable ICU 2.0
|
|
*/
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|
Collator();
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|
|
/**
|
|
* Constructor.
|
|
* Empty constructor, does not handle the arguments.
|
|
* This constructor is done for backward compatibility with 1.7 and 1.8.
|
|
* The task for handling the argument collation strength and normalization
|
|
* mode is left to the child class.
|
|
* @param collationStrength collation strength
|
|
* @param decompositionMode
|
|
* @deprecated ICU 2.4. Subclasses should use the default constructor
|
|
* instead and handle the strength and normalization mode themselves.
|
|
*/
|
|
Collator(UCollationStrength collationStrength,
|
|
UNormalizationMode decompositionMode);
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|
|
|
/**
|
|
* Copy constructor.
|
|
* @param other Collator object to be copied from
|
|
* @stable ICU 2.0
|
|
*/
|
|
Collator(const Collator& other);
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|
|
// Collator protected methods -----------------------------------------
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|
|
|
|
/**
|
|
* Used internally by registraton to define the requested and valid locales.
|
|
* @param requestedLocale the requested locale
|
|
* @param validLocale the valid locale
|
|
* @param actualLocale the actual locale
|
|
* @internal
|
|
*/
|
|
virtual void setLocales(const Locale& requestedLocale, const Locale& validLocale, const Locale& actualLocale);
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|
|
|
public:
|
|
#if !UCONFIG_NO_SERVICE
|
|
/**
|
|
* used only by ucol_open, not for public use
|
|
* @internal
|
|
*/
|
|
static UCollator* createUCollator(const char* loc, UErrorCode* status);
|
|
#endif
|
|
private:
|
|
/**
|
|
* Assignment operator. Private for now.
|
|
* @internal
|
|
*/
|
|
Collator& operator=(const Collator& other);
|
|
|
|
friend class CFactory;
|
|
friend class SimpleCFactory;
|
|
friend class ICUCollatorFactory;
|
|
friend class ICUCollatorService;
|
|
static Collator* makeInstance(const Locale& desiredLocale,
|
|
UErrorCode& status);
|
|
|
|
// Collator private data members ---------------------------------------
|
|
|
|
/*
|
|
synwee : removed as attributes to be handled by child class
|
|
UCollationStrength strength;
|
|
Normalizer::EMode decmp;
|
|
*/
|
|
/* This is useless information */
|
|
/* static const UVersionInfo fVersion;*/
|
|
};
|
|
|
|
#if !UCONFIG_NO_SERVICE
|
|
/**
|
|
* A factory, used with registerFactory, the creates multiple collators and provides
|
|
* display names for them. A factory supports some number of locales-- these are the
|
|
* locales for which it can create collators. The factory can be visible, in which
|
|
* case the supported locales will be enumerated by getAvailableLocales, or invisible,
|
|
* in which they are not. Invisible locales are still supported, they are just not
|
|
* listed by getAvailableLocales.
|
|
* <p>
|
|
* If standard locale display names are sufficient, Collator instances can
|
|
* be registered using registerInstance instead.</p>
|
|
* <p>
|
|
* Note: if the collators are to be used from C APIs, they must be instances
|
|
* of RuleBasedCollator.</p>
|
|
*
|
|
* @stable ICU 2.6
|
|
*/
|
|
class U_I18N_API CollatorFactory : public UObject {
|
|
public:
|
|
|
|
/**
|
|
* Destructor
|
|
* @stable ICU 3.0
|
|
*/
|
|
virtual ~CollatorFactory();
|
|
|
|
/**
|
|
* Return true if this factory is visible. Default is true.
|
|
* If not visible, the locales supported by this factory will not
|
|
* be listed by getAvailableLocales.
|
|
* @return true if the factory is visible.
|
|
* @stable ICU 2.6
|
|
*/
|
|
virtual UBool visible(void) const;
|
|
|
|
/**
|
|
* Return a collator for the provided locale. If the locale
|
|
* is not supported, return NULL.
|
|
* @param loc the locale identifying the collator to be created.
|
|
* @return a new collator if the locale is supported, otherwise NULL.
|
|
* @stable ICU 2.6
|
|
*/
|
|
virtual Collator* createCollator(const Locale& loc) = 0;
|
|
|
|
/**
|
|
* Return the name of the collator for the objectLocale, localized for the displayLocale.
|
|
* If objectLocale is not supported, or the factory is not visible, set the result string
|
|
* to bogus.
|
|
* @param objectLocale the locale identifying the collator
|
|
* @param displayLocale the locale for which the display name of the collator should be localized
|
|
* @param result an output parameter for the display name, set to bogus if not supported.
|
|
* @return the display name
|
|
* @stable ICU 2.6
|
|
*/
|
|
virtual UnicodeString& getDisplayName(const Locale& objectLocale,
|
|
const Locale& displayLocale,
|
|
UnicodeString& result);
|
|
|
|
/**
|
|
* Return an array of all the locale names directly supported by this factory.
|
|
* The number of names is returned in count. This array is owned by the factory.
|
|
* Its contents must never change.
|
|
* @param count output parameter for the number of locales supported by the factory
|
|
* @param status the in/out error code
|
|
* @return a pointer to an array of count UnicodeStrings.
|
|
* @stable ICU 2.6
|
|
*/
|
|
virtual const UnicodeString * getSupportedIDs(int32_t &count, UErrorCode& status) = 0;
|
|
};
|
|
#endif /* UCONFIG_NO_SERVICE */
|
|
|
|
// Collator inline methods -----------------------------------------------
|
|
|
|
U_NAMESPACE_END
|
|
|
|
#endif /* #if !UCONFIG_NO_COLLATION */
|
|
|
|
#endif
|