Examples of com.ibm.icu.util.RangeValueIterator

com.ibm.icu.util.RangeValueIterator
Interface for enabling iteration over sets of , where index is the sorted integer index in ascending order and value, its associated integer value.

The result for each iteration is the consecutive range of with the same value. Result is represented by where
- start is the starting integer of the result range
- limit is 1 after the maximum integer that follows start, such that all integers between start and (limit - 1), inclusive, have the same associated integer value.
- value is the integer value that all integers from start to (limit - 1) share in common.
Hence value(start) = value(start + 1) = .... = value(start + n) = .... = value(limit - 1). However value(start -1) != value(start) and value(limit) != value(start).

Most implementations will be created by factory methods, such as the character type iterator in UCharacter.getTypeIterator. See example below.
Example of use:
```
 RangeValueIterator iterator = UCharacter.getTypeIterator(); RangeValueIterator.Element result = new RangeValueIterator.Element(); while (iterator.next(result)) { System.out.println("Codepoint \\u" +  Integer.toHexString(result.start) +  " to codepoint \\u" + Integer.toHexString(result.limit - 1) +  " has the character type " + result.value); } 
```
@author synwee @stable ICU 2.6

        BuildTable temp = new BuildTable(t);
        assembleTable(temp, temp.m_collator_);
        // produce canonical closure 
        CollationElementIterator coleiter 
        = temp.m_collator_.getCollationElementIterator("");
        RangeValueIterator typeiter = UCharacter.getTypeIterator();
        RangeValueIterator.Element element = new RangeValueIterator.Element();
        while (typeiter.next(element)) {
            enumCategoryRangeClosureCategory(t, temp.m_collator_, coleiter, 
                         element.start, element.limit, 
                         element.value);
        }

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            { 0xFF00, UCharacterDirection.RIGHT_TO_LEFT_ARABIC },
            { 0x10800, UCharacterDirection.LEFT_TO_RIGHT },
            { 0x11000, UCharacterDirection.RIGHT_TO_LEFT },
            { 0x110000, UCharacterDirection.LEFT_TO_RIGHT }};


        RangeValueIterator iterator = UCharacter.getTypeIterator();
        RangeValueIterator.Element result = new RangeValueIterator.Element();
        while (iterator.next(result)) {
            if (result.start != limit) {
                errln("UCharacterIteration failed: Ranges not continuous " +
                        "0x" + Integer.toHexString(result.start));
            }


            limit = result.limit;
            if (result.value == prevtype) {
                errln("Type of the next set of enumeration should be different");
            }
            prevtype = result.value;


            for (int i = result.start; i < limit; i ++) {
                int temptype = UCharacter.getType(i);
                if (temptype != result.value) {
                    errln("UCharacterIteration failed: Codepoint \\u" +
                            Integer.toHexString(i) + " should be of type " +
                            temptype + " not " + result.value);
                }
            }


            for (int i = 0; i < test.length; ++ i) {
                if (result.start <= test[i][0] && test[i][0] < result.limit) {
                    if (result.value != test[i][1]) {
                        errln("error: getTypes() has range ["
                              + Integer.toHexString(result.start) + ", "
                              + Integer.toHexString(result.limit)
                              + "] with type " + result.value
                              + " instead of ["
                              + Integer.toHexString(test[i][0]) + ", "
                              + Integer.toHexString(test[i][1]));
                    }
                }
            }


            // LineBreak.txt specifies:
            //   #  - Assigned characters that are not listed explicitly are given the value
            //   #    "AL".
            //   #  - Unassigned characters are given the value "XX".
            //
            // PUA characters are listed explicitly with "XX".
            // Verify that no assigned character has "XX".
            if (result.value != UCharacterCategory.UNASSIGNED
                && result.value != UCharacterCategory.PRIVATE_USE) {
                int c = result.start;
                while (c < result.limit) {
                    if (0 == UCharacter.getIntPropertyValue(c,
                                                UProperty.LINE_BREAK)) {
                        logln("error UProperty.LINE_BREAK(assigned \\u"
                              + Utility.hex(c, 4) + ")=XX");
                    }
                    ++ c;
                }
            }


            /*
             * Verify default Bidi classes.
             * For recent Unicode versions, see UCD.html.
             *
             * For older Unicode versions:
             * See table 3-7 "Bidirectional Character Types" in UAX #9.
             * http://www.unicode.org/reports/tr9/
             *
             * See also DerivedBidiClass.txt for Cn code points!
             *
             * Unicode 4.0.1/Public Review Issue #28 (http://www.unicode.org/review/resolved-pri.html)
             * changed some default values.
             * In particular, non-characters and unassigned Default Ignorable Code Points
             * change from L to BN.
             *
             * UCD.html version 4.0.1 does not yet reflect these changes.
             */
            if (result.value == UCharacterCategory.UNASSIGNED
                || result.value == UCharacterCategory.PRIVATE_USE) {
                int c = result.start;
                for (int i = 0; i < defaultBidi.length && c < result.limit;
                     ++ i) {
                    if (c < defaultBidi[i][0]) {
                        while (c < result.limit && c < defaultBidi[i][0]) {
                            // TODO change to public UCharacter.isNonCharacter(c) once it's available
                            if(com.ibm.icu.impl.UCharacterUtility.isNonCharacter(c) || UCharacter.hasBinaryProperty(c, UProperty.DEFAULT_IGNORABLE_CODE_POINT)) {
                                shouldBeDir=UCharacter.BOUNDARY_NEUTRAL;
                            } else {
                                shouldBeDir=defaultBidi[i][1];
                            }


                            if (UCharacter.getDirection(c) != shouldBeDir
                                || UCharacter.getIntPropertyValue(c,
                                                          UProperty.BIDI_CLASS)
                                   != shouldBeDir) {
                                errln("error: getDirection(unassigned/PUA "
                                      + Integer.toHexString(c)
                                      + ") should be "
                                      + shouldBeDir);
                            }
                            ++ c;
                        }
                    }
                }
            }
        }


        iterator.reset();
        if (iterator.next(result) == false || result.start != 0) {
            System.out.println("result " + result.start);
            errln("UCharacterIteration reset() failed");
        }
    }

View Full Code Here

        BuildTable temp = new BuildTable(t);
        assembleTable(temp, temp.m_collator_);
        // produce canonical closure 
        CollationElementIterator coleiter 
        = temp.m_collator_.getCollationElementIterator("");
        RangeValueIterator typeiter = UCharacter.getTypeIterator();
        RangeValueIterator.Element element = new RangeValueIterator.Element();
        while (typeiter.next(element)) {
            enumCategoryRangeClosureCategory(t, temp.m_collator_, coleiter, 
                         element.start, element.limit, 
                         element.value);
        }
    }

View Full Code Here

  private void canonicalClosure(final BuildTable t) {
    BuildTable temp = new BuildTable(t);
    assembleTable(temp, temp.m_collator_);
    // produce canonical closure
    CollationElementIterator coleiter = temp.m_collator_.getCollationElementIterator("");
    RangeValueIterator typeiter = UCharacter.getTypeIterator();
    RangeValueIterator.Element element = new RangeValueIterator.Element();
    while (typeiter.next(element)) {
      enumCategoryRangeClosureCategory(t, temp.m_collator_, coleiter, element.start, element.limit, element.value);
    }


    t.cmLookup = temp.cmLookup;
    temp.cmLookup = null;

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        BuildTable temp = new BuildTable(t);
        assembleTable(temp, temp.m_collator_);
        // produce canonical closure
        CollationElementIterator coleiter = temp.m_collator_
                .getCollationElementIterator("");
        RangeValueIterator typeiter = UCharacter.getTypeIterator();
        RangeValueIterator.Element element = new RangeValueIterator.Element();
        while (typeiter.next(element)) {
            enumCategoryRangeClosureCategory(t, temp.m_collator_, coleiter,
                    element.start, element.limit, element.value);
        }


        t.cmLookup = temp.cmLookup;

View Full Code Here

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