| /* |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You 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 org.apache.lucene.analysis.icu.segmentation; |
| |
| |
| import java.text.CharacterIterator; |
| |
| /** |
| * Wraps a char[] as CharacterIterator for processing with a BreakIterator |
| * @lucene.experimental |
| */ |
| final class CharArrayIterator implements CharacterIterator { |
| private char array[]; |
| private int start; |
| private int index; |
| private int length; |
| private int limit; |
| |
| public char [] getText() { |
| return array; |
| } |
| |
| public int getStart() { |
| return start; |
| } |
| |
| public int getLength() { |
| return length; |
| } |
| |
| /** |
| * Set a new region of text to be examined by this iterator |
| * |
| * @param array text buffer to examine |
| * @param start offset into buffer |
| * @param length maximum length to examine |
| */ |
| void setText(final char array[], int start, int length) { |
| this.array = array; |
| this.start = start; |
| this.index = start; |
| this.length = length; |
| this.limit = start + length; |
| } |
| |
| @Override |
| public char current() { |
| return (index == limit) ? DONE : array[index]; |
| } |
| |
| @Override |
| public char first() { |
| index = start; |
| return current(); |
| } |
| |
| @Override |
| public int getBeginIndex() { |
| return 0; |
| } |
| |
| @Override |
| public int getEndIndex() { |
| return length; |
| } |
| |
| @Override |
| public int getIndex() { |
| return index - start; |
| } |
| |
| @Override |
| public char last() { |
| index = (limit == start) ? limit : limit - 1; |
| return current(); |
| } |
| |
| @Override |
| public char next() { |
| if (++index >= limit) { |
| index = limit; |
| return DONE; |
| } else { |
| return current(); |
| } |
| } |
| |
| @Override |
| public char previous() { |
| if (--index < start) { |
| index = start; |
| return DONE; |
| } else { |
| return current(); |
| } |
| } |
| |
| @Override |
| public char setIndex(int position) { |
| if (position < getBeginIndex() || position > getEndIndex()) |
| throw new IllegalArgumentException("Illegal Position: " + position); |
| index = start + position; |
| return current(); |
| } |
| |
| @Override |
| public CharArrayIterator clone() { |
| CharArrayIterator clone = new CharArrayIterator(); |
| clone.setText(array, start, length); |
| clone.index = index; |
| return clone; |
| } |
| } |