| /* |
| * 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.compound.hyphenation; |
| |
| /** |
| * This class implements a simple char vector with access to the underlying array. |
| * |
| * <p>This class has been taken from the Apache FOP project (http://xmlgraphics.apache.org/fop/). |
| * They have been slightly modified. |
| */ |
| public class CharVector implements Cloneable { |
| |
| /** Capacity increment size */ |
| private static final int DEFAULT_BLOCK_SIZE = 2048; |
| |
| private int blockSize; |
| |
| /** The encapsulated array */ |
| private char[] array; |
| |
| /** Points to next free item */ |
| private int n; |
| |
| public CharVector() { |
| this(DEFAULT_BLOCK_SIZE); |
| } |
| |
| public CharVector(int capacity) { |
| if (capacity > 0) { |
| blockSize = capacity; |
| } else { |
| blockSize = DEFAULT_BLOCK_SIZE; |
| } |
| array = new char[blockSize]; |
| n = 0; |
| } |
| |
| public CharVector(char[] a) { |
| blockSize = DEFAULT_BLOCK_SIZE; |
| array = a; |
| n = a.length; |
| } |
| |
| public CharVector(char[] a, int capacity) { |
| if (capacity > 0) { |
| blockSize = capacity; |
| } else { |
| blockSize = DEFAULT_BLOCK_SIZE; |
| } |
| array = a; |
| n = a.length; |
| } |
| |
| /** Reset Vector but don't resize or clear elements */ |
| public void clear() { |
| n = 0; |
| } |
| |
| @Override |
| public CharVector clone() { |
| CharVector cv = new CharVector(array.clone(), blockSize); |
| cv.n = this.n; |
| return cv; |
| } |
| |
| public char[] getArray() { |
| return array; |
| } |
| |
| /** return number of items in array */ |
| public int length() { |
| return n; |
| } |
| |
| /** returns current capacity of array */ |
| public int capacity() { |
| return array.length; |
| } |
| |
| public void put(int index, char val) { |
| array[index] = val; |
| } |
| |
| public char get(int index) { |
| return array[index]; |
| } |
| |
| public int alloc(int size) { |
| int index = n; |
| int len = array.length; |
| if (n + size >= len) { |
| char[] aux = new char[len + blockSize]; |
| System.arraycopy(array, 0, aux, 0, len); |
| array = aux; |
| } |
| n += size; |
| return index; |
| } |
| |
| public void trimToSize() { |
| if (n < array.length) { |
| char[] aux = new char[n]; |
| System.arraycopy(array, 0, aux, 0, n); |
| array = aux; |
| } |
| } |
| } |