Examples of java.text.CollationElementIterator

java.text.CollationElementIterator
The CollationElementIterator class is used as an iterator to walk through each character of an international string. Use the iterator to return the ordering priority of the positioned character. The ordering priority of a character, which we refer to as a key, defines how a character is collated in the given collation object.
For example, consider the following in Spanish:
```
 "ca" -> the first key is key('c') and second key is key('a'). "cha" -> the first key is key('ch') and second key is key('a'). 
```
And in German,
```
 "\u00e4b"-> the first key is key('a'), the second key is key('e'), and the third key is key('b'). 
```
The key of a character is an integer composed of primary order(short), secondary order(byte), and tertiary order(byte). Java strictly defines the size and signedness of its primitive data types. Therefore, the static functions primaryOrder, secondaryOrder, and tertiaryOrder return int, short, and short respectively to ensure the correctness of the key value.
Example of the iterator usage,
```
 String testString = "This is a test"; RuleBasedCollator ruleBasedCollator = (RuleBasedCollator)Collator.getInstance(); CollationElementIterator collationElementIterator = ruleBasedCollator.getCollationElementIterator(testString); int primaryOrder = CollationElementIterator.primaryOrder(collationElementIterator.next()); 
```
CollationElementIterator.next returns the collation order of the next character. A collation order consists of primary order, secondary order and tertiary order. The data type of the collation order is int. The first 16 bits of a collation order is its primary order; the next 8 bits is the secondary order and the last 8 bits is the tertiary order. @see Collator @see RuleBasedCollator @version 1.24 07/27/98 @author Helena Shih, Laura Werner, Richard Gillam


  public void testSetOffset() {
    RuleBasedCollator rbColl = (RuleBasedCollator) Collator
        .getInstance(new Locale("es", "", "TRADITIONAL"));
    String text = "cha";
    CollationElementIterator iterator = rbColl
        .getCollationElementIterator(text);
    iterator.setOffset(1);
    assertEquals(1, iterator.getOffset());
  }

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   */
  public void testSetTextString() {
    RuleBasedCollator rbColl = (RuleBasedCollator) Collator
        .getInstance(new Locale("es", "", "TRADITIONAL"));
    String text = "caa";
    CollationElementIterator iterator = rbColl
        .getCollationElementIterator(text);
    iterator.setOffset(1);
    assertEquals(1, iterator.getOffset());
    iterator.setText("cha");
    iterator.setOffset(1);
    assertEquals(1, iterator.getOffset());
  }

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   */
  public void testSetTextCharacterIterator() {
    RuleBasedCollator rbColl = (RuleBasedCollator) Collator
        .getInstance(new Locale("es", "", "TRADITIONAL"));
    String text = "caa";
    CollationElementIterator iterator = rbColl
        .getCollationElementIterator(text);
    iterator.setOffset(1);
    assertEquals(1, iterator.getOffset());
    iterator.setText(new StringCharacterIterator("cha"));
    iterator.setOffset(1);
    assertEquals(1, iterator.getOffset());
  }

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        {
            Locale locale = new Locale("es", "", "TRADITIONAL");
            RuleBasedCollator coll = (RuleBasedCollator) Collator
                    .getInstance(locale);
            String source = "cha";
            CollationElementIterator iterator = coll
                    .getCollationElementIterator(source);
            int[] e_offset = { 0, 1, 2 ,3};
            int offset = iterator.getOffset();
            int i = 0;
            assertEquals(e_offset[i++], offset);
            while (offset != source.length()) {
                iterator.next();
                offset = iterator.getOffset();
                assertEquals(e_offset[i++], offset);
            }
        }


        {
            Locale locale = new Locale("de", "DE");
            RuleBasedCollator coll = (RuleBasedCollator) Collator
                    .getInstance(locale);
            String source = "\u00E6b";
            CollationElementIterator iterator = coll
                    .getCollationElementIterator(source);
            int[] e_offset = { 0, 1, 1, 2 };
            int offset = iterator.getOffset();
            int i = 0;
            assertEquals(e_offset[i++], offset);
            while (offset != source.length()) {
                iterator.next();
                offset = iterator.getOffset();
                assertEquals(e_offset[i++], offset);
            }
        }
        //Regression for HARMONY-1352
        try {

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            Locale locale = new Locale("es", "", "TRADITIONAL");
            RuleBasedCollator coll = (RuleBasedCollator) Collator
                    .getInstance(locale);
            String text = "cha";
            StringCharacterIterator source = new StringCharacterIterator(text);
            CollationElementIterator iterator = coll
                    .getCollationElementIterator(source);
            int[] e_offset = { 0, 1, 2, 3 };
            int offset = iterator.getOffset();
            int i = 0;
            assertEquals(e_offset[i++], offset);
            while (offset != text.length()) {
                iterator.next();
                offset = iterator.getOffset();
                // System.out.println(offset);
                assertEquals(e_offset[i++], offset);
            }
        }


        {
            Locale locale = new Locale("de", "DE");
            RuleBasedCollator coll = (RuleBasedCollator) Collator
                    .getInstance(locale);
            String text = "\u00E6b";
            StringCharacterIterator source = new StringCharacterIterator(text);
            CollationElementIterator iterator = coll
                    .getCollationElementIterator(source);
            int[] e_offset = { 0, 1, 1, 2 };
            int offset = iterator.getOffset();
            int i = 0;
            assertEquals(e_offset[i++], offset);
            while (offset != text.length()) {
                iterator.next();
                offset = iterator.getOffset();
                assertEquals(e_offset[i++], offset);
            }
        }
        //Regression for HARMONY-1352
        try {

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    }
        


    collationElementsForString = new int[stringData.getLength()];


    CollationElementIterator cei = 
            collatorForCharacterDatatypes.getCollationElementIterator(
                stringData.getString());


    int nextInt;
    while ((nextInt = cei.next()) != CollationElementIterator.NULLORDER)
    {
      /* Believe it or not, a String might have more
       * collation elements than characters.
       * So, we handle that case by increasing the int array
       * by 5 and copying array elements.

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     * @param s2 the contained string
     * @return true iff s1 contains s2
     */


    public boolean contains(String s1, String s2) {
        CollationElementIterator iter1 = collator.getCollationElementIterator(s1);
        CollationElementIterator iter2 = collator.getCollationElementIterator(s2);
        return collationContains(iter1, iter2, null, false);
    }

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     * @param s2 the contained string
     * @return true iff s1 ends with s2
     */


    public boolean endsWith(String s1, String s2) {
        CollationElementIterator iter1 = collator.getCollationElementIterator(s1);
        CollationElementIterator iter2 = collator.getCollationElementIterator(s2);
        return collationContains(iter1, iter2, null, true);
    }

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     * @param s2 the contained string
     * @return true iff s1 starts with s2
     */


    public boolean startsWith(String s1, String s2) {
        CollationElementIterator iter1 = collator.getCollationElementIterator(s1);
        CollationElementIterator iter2 = collator.getCollationElementIterator(s2);
        return collationStartsWith(iter1, iter2);
    }

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     * @param s2 the contained string
     * @return the part of s1 that follows the first occurrence of s2
     */


    public String substringAfter(String s1, String s2) {
        CollationElementIterator iter1 = collator.getCollationElementIterator(s1);
        CollationElementIterator iter2 = collator.getCollationElementIterator(s2);
        int[] ia = new int[2];
        boolean ba = collationContains(iter1, iter2, ia, false);
        if (ba) {
            return s1.substring(ia[1]);
        } else {

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