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| 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 <tt>ComposedCharIter</tt>. 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 <tt>next</tt> 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 <tt>false</tt> and further calls | ||
| 64 | * to <tt>next</tt> 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 | } | ||