1 /* 2 * Copyright (C) 2008 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 package libcore.icu; 18 19 import java.text.CharacterIterator; 20 import java.text.StringCharacterIterator; 21 import java.util.Locale; 22 23 public final class NativeBreakIterator implements Cloneable { 24 // Acceptable values for the 'type' field. 25 private static final int BI_CHAR_INSTANCE = 1; 26 private static final int BI_WORD_INSTANCE = 2; 27 private static final int BI_LINE_INSTANCE = 3; 28 private static final int BI_SENT_INSTANCE = 4; 29 30 private final int address; 31 private final int type; 32 private CharacterIterator charIter; 33 34 private NativeBreakIterator(int address, int type) { 35 this.address = address; 36 this.type = type; 37 this.charIter = new StringCharacterIterator(""); 38 } 39 40 @Override 41 public Object clone() { 42 int cloneAddr = cloneImpl(this.address); 43 NativeBreakIterator clone = new NativeBreakIterator(cloneAddr, this.type); 44 // The RI doesn't clone the CharacterIterator. 45 clone.charIter = this.charIter; 46 return clone; 47 } 48 49 @Override 50 public boolean equals(Object object) { 51 if (object == this) { 52 return true; 53 } 54 if (!(object instanceof NativeBreakIterator)) { 55 return false; 56 } 57 // TODO: is this sufficient? shouldn't we be checking the underlying rules? 58 NativeBreakIterator rhs = (NativeBreakIterator) object; 59 return type == rhs.type && charIter.equals(rhs.charIter); 60 } 61 62 @Override 63 public int hashCode() { 64 return 42; // No-one uses BreakIterator as a hash key. 65 } 66 67 @Override protected void finalize() throws Throwable { 68 try { 69 closeBreakIteratorImpl(this.address); 70 } finally { 71 super.finalize(); 72 } 73 } 74 75 public int current() { 76 return currentImpl(this.address); 77 } 78 79 public int first() { 80 return firstImpl(this.address); 81 } 82 83 public int following(int offset) { 84 return followingImpl(this.address, offset); 85 } 86 87 public CharacterIterator getText() { 88 int newLoc = currentImpl(this.address); 89 this.charIter.setIndex(newLoc); 90 return this.charIter; 91 } 92 93 public int last() { 94 return lastImpl(this.address); 95 } 96 97 public int next(int n) { 98 return nextImpl(this.address, n); 99 } 100 101 public int next() { 102 return nextImpl(this.address, 1); 103 } 104 105 public int previous() { 106 return previousImpl(this.address); 107 } 108 109 public void setText(CharacterIterator newText) { 110 StringBuilder sb = new StringBuilder(); 111 for (char c = newText.first(); c != CharacterIterator.DONE; c = newText.next()) { 112 sb.append(c); 113 } 114 setText(sb.toString(), newText); 115 } 116 117 public void setText(String newText) { 118 setText(newText, new StringCharacterIterator(newText)); 119 } 120 121 private void setText(String s, CharacterIterator it) { 122 this.charIter = it; 123 setTextImpl(this.address, s); 124 } 125 126 public boolean isBoundary(int offset) { 127 return isBoundaryImpl(this.address, offset); 128 } 129 130 public int preceding(int offset) { 131 return precedingImpl(this.address, offset); 132 } 133 134 public static NativeBreakIterator getCharacterInstance(Locale where) { 135 return new NativeBreakIterator(getCharacterInstanceImpl(where.toString()), BI_CHAR_INSTANCE); 136 } 137 138 public static NativeBreakIterator getLineInstance(Locale where) { 139 return new NativeBreakIterator(getLineInstanceImpl(where.toString()), BI_LINE_INSTANCE); 140 } 141 142 public static NativeBreakIterator getSentenceInstance(Locale where) { 143 return new NativeBreakIterator(getSentenceInstanceImpl(where.toString()), BI_SENT_INSTANCE); 144 } 145 146 public static NativeBreakIterator getWordInstance(Locale where) { 147 return new NativeBreakIterator(getWordInstanceImpl(where.toString()), BI_WORD_INSTANCE); 148 } 149 150 private static native int getCharacterInstanceImpl(String locale); 151 private static native int getWordInstanceImpl(String locale); 152 private static native int getLineInstanceImpl(String locale); 153 private static native int getSentenceInstanceImpl(String locale); 154 private static native void closeBreakIteratorImpl(int address); 155 private static native void setTextImpl(int address, String text); 156 private static native int cloneImpl(int address); 157 private static native int precedingImpl(int address, int offset); 158 private static native boolean isBoundaryImpl(int address, int offset); 159 private static native int nextImpl(int address, int n); 160 private static native int previousImpl(int address); 161 private static native int currentImpl(int address); 162 private static native int firstImpl(int address); 163 private static native int followingImpl(int address, int offset); 164 private static native int lastImpl(int address); 165 } 166
