| /* |
| * Copyright (C) 2008 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package libcore.icu; |
| |
| import java.text.CharacterIterator; |
| import java.text.StringCharacterIterator; |
| import java.util.Locale; |
| |
| public final class NativeBreakIterator implements Cloneable { |
| // Acceptable values for the 'type' field. |
| private static final int BI_CHAR_INSTANCE = 1; |
| private static final int BI_WORD_INSTANCE = 2; |
| private static final int BI_LINE_INSTANCE = 3; |
| private static final int BI_SENT_INSTANCE = 4; |
| |
| // The address of the native peer. |
| // Uses of this must be manually synchronized to avoid native crashes. |
| private final int address; |
| |
| private final int type; |
| private String string; |
| private CharacterIterator charIterator; |
| |
| private NativeBreakIterator(int address, int type) { |
| this.address = address; |
| this.type = type; |
| this.charIterator = new StringCharacterIterator(""); |
| } |
| |
| @Override |
| public Object clone() { |
| int cloneAddr = cloneImpl(this.address); |
| NativeBreakIterator clone = new NativeBreakIterator(cloneAddr, this.type); |
| clone.string = this.string; |
| // The RI doesn't clone the CharacterIterator. |
| clone.charIterator = this.charIterator; |
| return clone; |
| } |
| |
| @Override |
| public boolean equals(Object object) { |
| if (object == this) { |
| return true; |
| } |
| if (!(object instanceof NativeBreakIterator)) { |
| return false; |
| } |
| // TODO: is this sufficient? shouldn't we be checking the underlying rules? |
| NativeBreakIterator rhs = (NativeBreakIterator) object; |
| return type == rhs.type && charIterator.equals(rhs.charIterator); |
| } |
| |
| @Override |
| public int hashCode() { |
| return 42; // No-one uses BreakIterator as a hash key. |
| } |
| |
| @Override protected void finalize() throws Throwable { |
| try { |
| closeImpl(this.address); |
| } finally { |
| super.finalize(); |
| } |
| } |
| |
| public int current() { |
| return currentImpl(this.address, this.string); |
| } |
| |
| public int first() { |
| return firstImpl(this.address, this.string); |
| } |
| |
| public int following(int offset) { |
| return followingImpl(this.address, this.string, offset); |
| } |
| |
| public CharacterIterator getText() { |
| int newLocation = currentImpl(this.address, this.string); |
| this.charIterator.setIndex(newLocation); |
| return this.charIterator; |
| } |
| |
| public int last() { |
| return lastImpl(this.address, this.string); |
| } |
| |
| public int next(int n) { |
| return nextImpl(this.address, this.string, n); |
| } |
| |
| public int next() { |
| return nextImpl(this.address, this.string, 1); |
| } |
| |
| public int previous() { |
| return previousImpl(this.address, this.string); |
| } |
| |
| public void setText(CharacterIterator newText) { |
| StringBuilder sb = new StringBuilder(); |
| for (char c = newText.first(); c != CharacterIterator.DONE; c = newText.next()) { |
| sb.append(c); |
| } |
| setText(sb.toString(), newText); |
| } |
| |
| public void setText(String newText) { |
| setText(newText, new StringCharacterIterator(newText)); |
| } |
| |
| private void setText(String s, CharacterIterator it) { |
| this.string = s; |
| this.charIterator = it; |
| setTextImpl(this.address, this.string); |
| } |
| |
| public boolean hasText() { |
| return (string != null); |
| } |
| |
| public boolean isBoundary(int offset) { |
| return isBoundaryImpl(this.address, this.string, offset); |
| } |
| |
| public int preceding(int offset) { |
| return precedingImpl(this.address, this.string, offset); |
| } |
| |
| public static NativeBreakIterator getCharacterInstance(Locale where) { |
| return new NativeBreakIterator(getCharacterInstanceImpl(where.toString()), BI_CHAR_INSTANCE); |
| } |
| |
| public static NativeBreakIterator getLineInstance(Locale where) { |
| return new NativeBreakIterator(getLineInstanceImpl(where.toString()), BI_LINE_INSTANCE); |
| } |
| |
| public static NativeBreakIterator getSentenceInstance(Locale where) { |
| return new NativeBreakIterator(getSentenceInstanceImpl(where.toString()), BI_SENT_INSTANCE); |
| } |
| |
| public static NativeBreakIterator getWordInstance(Locale where) { |
| return new NativeBreakIterator(getWordInstanceImpl(where.toString()), BI_WORD_INSTANCE); |
| } |
| |
| private static native int getCharacterInstanceImpl(String locale); |
| private static native int getWordInstanceImpl(String locale); |
| private static native int getLineInstanceImpl(String locale); |
| private static native int getSentenceInstanceImpl(String locale); |
| private static synchronized native int cloneImpl(int address); |
| |
| private static synchronized native void closeImpl(int address); |
| |
| private static synchronized native void setTextImpl(int address, String text); |
| private static synchronized native int precedingImpl(int address, String text, int offset); |
| private static synchronized native boolean isBoundaryImpl(int address, String text, int offset); |
| private static synchronized native int nextImpl(int address, String text, int n); |
| private static synchronized native int previousImpl(int address, String text); |
| private static synchronized native int currentImpl(int address, String text); |
| private static synchronized native int firstImpl(int address, String text); |
| private static synchronized native int followingImpl(int address, String text, int offset); |
| private static synchronized native int lastImpl(int address, String text); |
| } |