Java tutorial
/* * 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. */ /* * This file is one of the source files for the examples contained in * /src/site/xdoc/examples.xml * It is not intended to be included in a source release. */ import java.io.IOException; import java.io.Reader; import org.apache.commons.pool2.ObjectPool; /** * Maintains a pool of StringBuffers used to dump contents of Readers. */ public class ReaderUtil { private ObjectPool<StringBuffer> pool; public ReaderUtil(ObjectPool<StringBuffer> pool) { this.pool = pool; } /** * Dumps the contents of the {@link Reader} to a String, closing the {@link Reader} when done. */ public String readToString(Reader in) throws IOException { StringBuffer buf = null; try { buf = pool.borrowObject(); for (int c = in.read(); c != -1; c = in.read()) { buf.append((char) c); } return buf.toString(); } catch (IOException e) { throw e; } catch (Exception e) { throw new RuntimeException("Unable to borrow buffer from pool" + e.toString()); } finally { try { in.close(); } catch (Exception e) { // ignored } try { if (null != buf) { pool.returnObject(buf); } } catch (Exception e) { // ignored } } } }