| /* |
| * 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. |
| */ |
| /* |
| * $Id: StringBufferPool.java 468655 2006-10-28 07:12:06Z minchau $ |
| */ |
| package org.apache.xml.utils; |
| |
| /** |
| * This class pools string buffers, since they are reused so often. |
| * String buffers are good candidates for pooling, because of |
| * their supporting character arrays. |
| * @xsl.usage internal |
| */ |
| public class StringBufferPool |
| { |
| |
| /** The global pool of string buffers. */ |
| private static ObjectPool m_stringBufPool = |
| new ObjectPool(org.apache.xml.utils.FastStringBuffer.class); |
| |
| /** |
| * Get the first free instance of a string buffer, or create one |
| * if there are no free instances. |
| * |
| * @return A string buffer ready for use. |
| */ |
| public synchronized static FastStringBuffer get() |
| { |
| return (FastStringBuffer) m_stringBufPool.getInstance(); |
| } |
| |
| /** |
| * Return a string buffer back to the pool. |
| * |
| * @param sb Must be a non-null reference to a string buffer. |
| */ |
| public synchronized static void free(FastStringBuffer sb) |
| { |
| // Since this isn't synchronized, setLength must be |
| // done before the instance is freed. |
| // Fix attributed to Peter Speck <speck@ruc.dk>. |
| sb.setLength(0); |
| m_stringBufPool.freeInstance(sb); |
| } |
| } |