Examples of com.ibm.icu.text.CollationKey

com.ibm.icu.text.CollationKey

cu-project.org/userguide/Collate_ServiceArchitecture.html"> user guide.

The following example shows how CollationKeys can be used to sort a list of Strings.

 // Create an array of CollationKeys for the Strings to be sorted. Collator myCollator = Collator.getInstance(); CollationKey[] keys = new CollationKey[3]; keys[0] = myCollator.getCollationKey("Tom"); keys[1] = myCollator.getCollationKey("Dick"); keys[2] = myCollator.getCollationKey("Harry"); sort( keys ); 
 //... 
 // Inside body of sort routine, compare keys this way if( keys[i].compareTo( keys[j] ) > 0 ) // swap keys[i] and keys[j] 
 //... 
 // Finally, when we've returned from sort. System.out.println( keys[0].getSourceString() ); System.out.println( keys[1].getSourceString() ); System.out.println( keys[2].getSourceString() );

This class is not subclassable

@see Collator @see RuleBasedCollator @stable ICU 2.8

    }
    return sb;
  }
  private static byte[] getSortByteArray (String term)
  {
    CollationKey colKey = col.getCollationKey(term);
    return colKey.toByteArray();
    //RawCollationKey rawKey = col.getRawCollationKey(term, null);
    //byte[] byt2= rawKey.releaseBytes();
   }

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    }
    return sb;
  }
  private static byte[] getSortByteArray (String term)
  {
    CollationKey colKey = col.getCollationKey(term);
    return colKey.toByteArray();
  }

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     * Test method for 'com.ibm.icu.text.CollationKey.getSourceString()'
     */
    public void testGetSourceString() {
        Collator c = Collator.getInstance();
        c.setStrength(Collator.PRIMARY);
        CollationKey k1 = c.getCollationKey("This");
        assertEquals("This", k1.getSourceString());
    }

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     * Test method for 'com.ibm.icu.text.CollationKey.toByteArray()'
     */
    public void testToByteArray() {
        Collator c = Collator.getInstance();
        c.setStrength(Collator.PRIMARY);
        CollationKey k1 = c.getCollationKey("This");
        byte[] key = k1.toByteArray();
        assertNotNull(key);
        assertTrue(0 < key.length);
    }

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        }
        
        int lineNo = 0;
        
        String line = null, oldLine = null, buffer = null, oldB = null;
        CollationKey oldSk = null, newSk = null;
        
        int res = 0, cmpres = 0, cmpres2 = 0;
        
        try {
            while ((line = in.readLine()) != null) {
                lineNo++;
                if(line.length() < 3 || line.charAt(0) == '#') {
                    continue;
                }
                buffer = parseString(line);
                
                newSk = coll.getCollationKey(buffer);
                if(oldSk != null) {
                    res = oldSk.compareTo(newSk);
                    cmpres = coll.compare(oldB, buffer);
                    cmpres2 = coll.compare(buffer, oldB);
                    
                    if(cmpres != -cmpres2) {
                        errln("Compare result not symmetrical on line "+lineNo);

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    public void TestBocsuCoverage() {
        String test = "\u0041\u0441\u4441\\U00044441\u4441\u0441\u0041";
        Collator coll = Collator.getInstance();
        coll.setStrength(Collator.IDENTICAL);
        CollationKey key = coll.getCollationKey(test);
        logln("source:" + key.getSourceString());
    }

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    public void TestMergeSortKeys() 
    {
        String cases[] = {"abc", "abcd", "abcde"};
        String prefix = "foo";
        String suffix = "egg";
        CollationKey mergedPrefixKeys[] = new CollationKey[cases.length];
        CollationKey mergedSuffixKeys[] = new CollationKey[cases.length];
        
        Collator coll = Collator.getInstance(Locale.ENGLISH);
        genericLocaleStarter(Locale.ENGLISH, cases);
        
        int strength = Collator.PRIMARY;
        while (strength <= Collator.IDENTICAL) {
            coll.setStrength(strength);
            CollationKey prefixKey = coll.getCollationKey(prefix);
            CollationKey suffixKey = coll.getCollationKey(suffix);
            for (int i = 0; i < cases.length; i ++) {
                CollationKey key = coll.getCollationKey(cases[i]);
                mergedPrefixKeys[i] = prefixKey.merge(key);
                mergedSuffixKeys[i] = suffixKey.merge(key);
                if (mergedPrefixKeys[i].getSourceString() != null
                    || mergedSuffixKeys[i].getSourceString() != null) {
                    errln("Merged source string error: expected null");

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                        errln("Token " + tokens[i] + " expected to fail");
                    }
                    if (varTop != coll.getVariableTop()) {
                        errln("Error setting and getting variable top");
                    }
                    CollationKey key1 = coll.getCollationKey(tokens[i]);
                    for (int j = 0; j < i; j ++) {
                        CollationKey key2 = coll.getCollationKey(tokens[j]);
                        if (key2.compareTo(key1) < 0) {
                            errln("Setting variable top shouldn't change the comparison sequence");
                        }
                        byte sortorder[] = key2.toByteArray();
                        if (sortorder.length > 0 
                            && (key2.toByteArray())[0] > 1) {
                            errln("Primary sort order should be 0");
                        }
                    }
                } catch (Exception e) {
                    CollationElementIterator iter

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            } catch (Exception e) {
                warnln("Unable to open collator with rules " + rules[i]);
            }


            logln("Test case["+i+"]:");
            CollationKey expectingKey = coll.getCollationKey(cases[i][0]);
            for (int j=1; j<cases[i].length; j++) {
                CollationKey key = coll.getCollationKey(cases[i][j]);
                if ( key.compareTo(expectingKey)!=0) {
                    errln("Error! Test case["+i+"]:"+"source:" + key.getSourceString());
                    errln("expecting:"+prettify(expectingKey)+ "got:"+  prettify(key));
                }
                logln("   Key:"+  prettify(key));
            }
        }   
        
        
        RuleBasedCollator vi_vi = null;
        try {
            vi_vi = (RuleBasedCollator)Collator.getInstance(
                                                      new Locale("vi", ""));
            logln("VI sort:");
            CollationKey expectingKey = vi_vi.getCollationKey(cases[0][0]);
            for (int j=1; j<cases[0].length; j++) {
                CollationKey key = vi_vi.getCollationKey(cases[0][j]);
                if ( key.compareTo(expectingKey)!=0) {
                    // TODO (claireho): change the logln to errln after vi.res is up-to-date.
                    // errln("source:" + key.getSourceString());
                    // errln("expecting:"+prettify(expectingKey)+ "got:"+  prettify(key));
                    logln("Error!! in Vietnese sort - source:" + key.getSourceString());
                    logln("expecting:"+prettify(expectingKey)+ "got:"+  prettify(key));
                }
                // logln("source:" + key.getSourceString());
                logln("   Key:"+  prettify(key));
            }

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                warnln("Unable to open collator with rules " + rules[i]);
            }


            logln("Test rule["+i+"]"+rules[i]);
            
            CollationKey keyA = coll.getCollationKey("a");
            logln("Key for \"a\":"+  prettify(keyA));
            if (keyA.compareTo(coll.getCollationKey(lastPrimIgn))<=0) {
                CollationKey key = coll.getCollationKey(lastPrimIgn);
                logln("Collation key for 0xD800 0xDDFD: "+prettify(key));
                errln("Error! String \"a\" must be greater than \uD800\uDDFD -"+
                      "[Last Primary Ignorable]");
            }
            if (keyA.compareTo(coll.getCollationKey(firstVariable))>=0) {
                CollationKey key = coll.getCollationKey(firstVariable);
                logln("Collation key for 0x0009: "+prettify(key));
                errln("Error! String \"a\" must be less than 0x0009 - [First Variable]");
            }
            CollationKey keyB = coll.getCollationKey("b");
            logln("Key for \"b\":"+  prettify(keyB));
            if (keyB.compareTo(coll.getCollationKey(firstPrimIgn))<=0) {
                CollationKey key = coll.getCollationKey(firstPrimIgn);
                logln("Collation key for 0x0332: "+prettify(key));
                errln("Error! String \"b\" must be greater than 0x0332 -"+
                      "[First Primary Ignorable]");
            }
            if (keyB.compareTo(coll.getCollationKey(firstVariable))>=0) {
                CollationKey key = coll.getCollationKey(firstVariable);
                logln("Collation key for 0x0009: "+prettify(key));
                errln("Error! String \"b\" must be less than 0x0009 - [First Variable]");
            }
        }
        {
            i=1;   
            RuleBasedCollator coll = null;
            try {
                coll = new RuleBasedCollator(rules[i]);
            } catch (Exception e) {
                warnln("Unable to open collator with rules " + rules[i]);
            }


            logln("Test rule["+i+"]"+rules[i]);
            
            CollationKey keyA = coll.getCollationKey("a");
            logln("Key for \"a\":"+  prettify(keyA));
            byte[] keyAInBytes = keyA.toByteArray();
            for (int j=0; j<keyAInBytes.length && j<secIgnKey.length; j++) {
                if (keyAInBytes[j]!=secIgnKey[j]) {
                    if ((char)keyAInBytes[j]<=(char)secIgnKey[j]) {
                        logln("Error! String \"a\" must be greater than [Last Secondary Ignorable]");
                    }
                    break;
                }
            }
            if (keyA.compareTo(coll.getCollationKey(firstVariable))>=0) {
                errln("Error! String \"a\" must be less than 0x0009 - [First Variable]");
                CollationKey key = coll.getCollationKey(firstVariable);
                logln("Collation key for 0x0009: "+prettify(key));
            }
            CollationKey keyB = coll.getCollationKey("b");
            logln("Key for \"b\":"+  prettify(keyB));
            byte[] keyBInBytes = keyB.toByteArray();
            for (int j=0; j<keyBInBytes.length && j<secIgnKey.length; j++) {
                if (keyBInBytes[j]!=secIgnKey[j]) {
                    if ((char)keyBInBytes[j]<=(char)secIgnKey[j]) {
                        errln("Error! String \"b\" must be greater than [Last Secondary Ignorable]");
                    }
                    break;
                }
            }
            if (keyB.compareTo(coll.getCollationKey(firstVariable))>=0) {
                CollationKey key = coll.getCollationKey(firstVariable);
                logln("Collation key for 0x0009: "+prettify(key));
                errln("Error! String \"b\" must be less than 0x0009 - [First Variable]");
            }
        }   
    }

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