1 /* 2 * Copyright (c) 2001, 2005, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. Oracle designates this 8 * particular file as subject to the "Classpath" exception as provided 9 * by Oracle in the LICENSE file that accompanied this code. 10 * 11 * This code is distributed in the hope that it will be useful, but WITHOUT 12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 14 * version 2 for more details (a copy is included in the LICENSE file that 15 * accompanied this code). 16 * 17 * You should have received a copy of the GNU General Public License version 18 * 2 along with this work; if not, write to the Free Software Foundation, 19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 20 * 21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 22 * or visit www.oracle.com if you need additional information or have any 23 * questions. 24 */ 25 26 package sun.text; 27 28 import sun.text.normalizer.NormalizerBase; 29 import sun.text.normalizer.NormalizerImpl; 30 31 public final class ComposedCharIter { 32 /** 33 * Constant that indicates the iteration has completed. 34 * {@link #next} returns this value when there are no more composed characters 35 * over which to iterate. 36 */ 37 public static final int DONE = NormalizerBase.DONE; 38 39 //cache the decomps mapping, so the seconde composedcharIter does 40 //not need to get the data again. 41 private static int chars[]; 42 private static String decomps[]; 43 private static int decompNum; 44 45 static { 46 int maxNum = 2000; //TBD: Unicode 4.0 only has 1926 canoDecomp... 47 chars = new int[maxNum]; 48 decomps = new String[maxNum]; 49 decompNum = NormalizerImpl.getDecompose(chars, decomps); 50 } 51 52 /** 53 * Construct a new {@code ComposedCharIter}. The iterator will return 54 * all Unicode characters with canonical decompositions, excluding Korean 55 * Hangul characters. 56 */ 57 public ComposedCharIter() { } 58 59 /** 60 * Returns the next precomposed Unicode character. 61 * Repeated calls to {@code next} return all of the precomposed characters defined 62 * by Unicode, in ascending order. After all precomposed characters have 63 * been returned, {@link #hasNext} will return {@code false} and further calls 64 * to {@code next} will return {@link #DONE}. 65 */ 66 public int next() { 67 if (curChar == decompNum - 1) { 68 return DONE; 69 } 70 return chars[++curChar]; 71 } 72 73 /** 74 * Returns the Unicode decomposition of the current character. 75 * This method returns the decomposition of the precomposed character most 76 * recently returned by {@link #next}. The resulting decomposition is 77 * affected by the settings of the options passed to the constructor. 78 */ 79 public String decomposition() { 80 return decomps[curChar]; 81 } 82 private int curChar = -1; 83 }