add fake enum

X-SVN-Rev: 8927

tools/unicodetools/com/ibm/text/utility/EnumBase.java

@@ -0,0 +1,93 @@
+/**
+*******************************************************************************
+* Copyright (C) 1996-2001, International Business Machines Corporation and    *
+* others. All Rights Reserved.                                                *
+*******************************************************************************
+*
+* $Source: /xsrl/Nsvn/icu/unicodetools/com/ibm/text/utility/EnumBase.java,v $
+* $Date: 2002/06/22 21:01:25 $
+* $Revision: 1.1 $
+*
+*******************************************************************************
+*/
+
+package com.ibm.text.utility;
+
+import java.util.*;
+import java.text.*;
+import java.io.*;
+
+/**
+    Used for generating fake enums. These can be compared with ==, 
+    used in for statements, etc.
+    Subclasses will be of the form:
+    <pre>
+    static public class MyEnum extends EnumBase {
+        public static MyEnum
+            ZEROED = (MyEnum) makeNext(new MyEnum(), "ZEROED"),
+            SHIFTED = (MyEnum) makeNext(new MyEnum(), "SHIFTED"),
+            NON_IGNORABLE = (MyEnum) makeNext(new MyEnum(), "NON_IGNORABLE");
+        public MyEnum next() { return (MyEnum) internalNext(); }
+    }
+    </pre>
+*/
+    
+public class EnumBase implements Comparable {
+
+    /** For use in collections
+     */
+    public int compareTo(Object other) {
+        EnumBase that = (EnumBase) other;
+        return value < that.value ? -1 : value > that.value ? 1 : 0;
+    }
+    
+    // dont' need equals, since object identity sufficies.
+
+    public int hashCode() {
+        return value;
+    }
+    
+    public String toString() {
+        return (String)uniqueNames.get(value);
+    }
+    
+    //////////////////
+    
+    private int value;
+    private static List uniqueList = new ArrayList();
+    private static List uniqueNames = new ArrayList();
+
+    /** For use in for(..) statements
+     */
+    public Object internalNext() {
+        int temp = value + 1;
+        if (temp >= uniqueList.size()) return null;
+        Object result = uniqueList.get(temp);
+        if (getClass() != result.getClass()) return null;
+        return result;
+    }
+    
+    /**
+     * For constructing the enums the first time
+     */
+    static protected EnumBase makeNext(EnumBase result, String name) {
+        try {
+            result.value = uniqueList.size();
+            uniqueList.add(result);
+            uniqueNames.add(name);
+            return result;
+        } catch (Exception e) {
+            e.printStackTrace();
+            throw new IllegalArgumentException("Internal Error in " + result);
+        }
+    }
+    
+    /*
+    protected final int getValue() {
+        return value;
+    }
+    */
+    
+    protected EnumBase() {}
+}
+    

tools/unicodetools/com/ibm/text/utility/Main.java

@@ -0,0 +1,61 @@
+/**
+*******************************************************************************
+* Copyright (C) 1996-2001, International Business Machines Corporation and    *
+* others. All Rights Reserved.                                                *
+*******************************************************************************
+*
+* $Source: /xsrl/Nsvn/icu/unicodetools/com/ibm/text/utility/Main.java,v $
+* $Date: 2002/06/22 21:01:25 $
+* $Revision: 1.1 $
+*
+*******************************************************************************
+*/
+
+package com.ibm.text.utility;
+
+import java.util.*;
+import java.text.*;
+import java.io.*;
+
+public class Main {
+    
+    static public class CollatorStyle extends EnumBase {
+        public static CollatorStyle
+            ZEROED = (CollatorStyle) makeNext(new CollatorStyle(), "ZEROED"),
+            SHIFTED = (CollatorStyle) makeNext(new CollatorStyle(), "SHIFTED"),
+            NON_IGNORABLE = (CollatorStyle) makeNext(new CollatorStyle(), "NON_IGNORABLE");
+        public CollatorStyle next() { return (CollatorStyle) internalNext(); }
+        private CollatorStyle() {}
+    }
+    
+    static public class NormalizerType extends EnumBase {
+        public static NormalizerType
+            NFC = (NormalizerType) makeNext(new NormalizerType(), "NFC"),
+            NFD = (NormalizerType) makeNext(new NormalizerType(), "NFD"),
+            NFKC = (NormalizerType) makeNext(new NormalizerType(), "NFKC"),
+            NFKD = (NormalizerType) makeNext(new NormalizerType(), "NFKD");
+        public NormalizerType next() { return (NormalizerType) internalNext(); }
+        private NormalizerType() {}
+    }
+    
+    static public class Length extends EnumBase {
+        public static Length
+            SHORT = (Length) makeNext(new Length(), "SHORT"),
+            NORMAL = (Length) makeNext(new Length(), "NORMAL"),
+            LONG = (Length) makeNext(new Length(), "LONG");
+        public Length next() { return (Length) internalNext(); }
+        private Length() {}
+    }
+    
+    static public void main (String[] args) {
+        for (CollatorStyle i = CollatorStyle.ZEROED; i != null; i = i.next()) {
+            System.out.println(i);
+        }
+        for (NormalizerType i = NormalizerType.NFC; i != null; i = i.next()) {
+            System.out.println(i);
+        }
+        
+        NormalizerType foo = new NormalizerType();
+    }
+    
+}

tools/unicodetools/com/ibm/text/utility/TestUtility.java

@@ -0,0 +1,42 @@
+/**
+*******************************************************************************
+* Copyright (C) 1996-2001, International Business Machines Corporation and    *
+* others. All Rights Reserved.                                                *
+*******************************************************************************
+*
+* $Source: /xsrl/Nsvn/icu/unicodetools/com/ibm/text/utility/TestUtility.java,v $
+* $Date: 2002/06/22 21:01:25 $
+* $Revision: 1.1 $
+*
+*******************************************************************************
+*/
+
+package com.ibm.text.utility;
+
+import java.util.*;
+import java.text.*;
+import java.io.*;
+
+public class Main {
+    
+    static public class MyEnum implements EnumBase {
+        public static MyEnum
+            ZEROED = (MyEnum) makeNext(myEnum.getClass()),
+            SHIFTED = (MyEnum) makeNext(),
+            NON_IGNORABLE = (MyEnum) makeNext(),
+                
+            FIRST_ENUM = ZEROED,
+            LAST_ENUM = NON_IGNORABLE;
+        public MyEnum next(int value) {
+            return (MyEnum) internalNext(value);
+        }
+        protected MyEnum() {}
+    }
+    
+    static public void main (String[] args) {
+        for (MyEnum i = MyEnum.FIRST_ENUM; i != null; i = i.next()) {
+            System.out.println(i.getValue());
+        }
+    }
+    
+}