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ICU-5073 Use UCharacter.foldCase for equals() method as well as hashCode(). Split case folding out to a static method, cache case folded string.

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X-SVN-Rev: 21574
This commit is contained in:
Eric Mader 2007-05-23 22:39:47 +00:00
parent 1f1a5deb79
commit 9e6566c584
1 changed files with 22 additions and 4 deletions
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26
icu4j/src/com/ibm/icu/util/CaseInsensitiveString.java
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@ -19,6 +19,14 @@ public class CaseInsensitiveString {
private String string;
private int hash = 0;
private String folded = null;
private static String fold(String foldee)
{
return UCharacter.foldCase(foldee, true);
}
/**
* Constructs an CaseInsentiveString object from the given string
* @param s The string to construct this object from
@ -41,11 +49,15 @@ public class CaseInsensitiveString {
* @stable ICU 2.0
*/
public boolean equals(Object o) {
if (folded == null) {
folded = fold(string);
}
try {
return string.equalsIgnoreCase(((CaseInsensitiveString)o).string);
return folded.equals(fold(((CaseInsensitiveString)o).string));
} catch (ClassCastException e) {
try {
return string.equalsIgnoreCase((String)o);
return folded.equals(fold((String) o));
} catch (ClassCastException e2) {
return false;
}
@ -58,11 +70,17 @@ public class CaseInsensitiveString {
* @stable ICU 2.0
*/
public int hashCode() {
if (hash == 0) {
hash = UCharacter.foldCase(string, true).hashCode();
if (folded == null) {
folded = fold(string);
}
if (hash == 0) {
hash = folded.hashCode();
}
return hash;
}
/**
* Overrides superclass method
* @stable ICU 3.6