| /* |
| * $HeadURL: http://svn.apache.org/repos/asf/httpcomponents/httpcore/trunk/module-main/src/main/java/org/apache/http/entity/BufferedHttpEntity.java $ |
| * $Revision: 496070 $ |
| * $Date: 2007-01-14 04:18:34 -0800 (Sun, 14 Jan 2007) $ |
| * |
| * ==================================================================== |
| * 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 software consists of voluntary contributions made by many |
| * individuals on behalf of the Apache Software Foundation. For more |
| * information on the Apache Software Foundation, please see |
| * <http://www.apache.org/>. |
| * |
| */ |
| |
| package org.apache.http.entity; |
| |
| import java.io.ByteArrayInputStream; |
| import java.io.IOException; |
| import java.io.InputStream; |
| import java.io.OutputStream; |
| |
| import org.apache.http.HttpEntity; |
| import org.apache.http.util.EntityUtils; |
| |
| /** |
| * A wrapping entity that buffers it content if necessary. |
| * The buffered entity is always repeatable. |
| * If the wrapped entity is repeatable itself, calls are passed through. |
| * If the wrapped entity is not repeatable, the content is read into a |
| * buffer once and provided from there as often as required. |
| * |
| * @author <a href="mailto:oleg at ural.ru">Oleg Kalnichevski</a> |
| * |
| * @version $Revision: 496070 $ |
| * |
| * @since 4.0 |
| */ |
| public class BufferedHttpEntity extends HttpEntityWrapper { |
| |
| private final byte[] buffer; |
| |
| public BufferedHttpEntity(final HttpEntity entity) throws IOException { |
| super(entity); |
| if (!entity.isRepeatable() || entity.getContentLength() < 0) { |
| this.buffer = EntityUtils.toByteArray(entity); |
| } else { |
| this.buffer = null; |
| } |
| } |
| |
| public long getContentLength() { |
| if (this.buffer != null) { |
| return this.buffer.length; |
| } else { |
| return wrappedEntity.getContentLength(); |
| } |
| } |
| |
| public InputStream getContent() throws IOException { |
| if (this.buffer != null) { |
| return new ByteArrayInputStream(this.buffer); |
| } else { |
| return wrappedEntity.getContent(); |
| } |
| } |
| |
| /** |
| * Tells that this entity does not have to be chunked. |
| * |
| * @return <code>false</code> |
| */ |
| public boolean isChunked() { |
| return (buffer == null) && wrappedEntity.isChunked(); |
| } |
| |
| /** |
| * Tells that this entity is repeatable. |
| * |
| * @return <code>true</code> |
| */ |
| public boolean isRepeatable() { |
| return true; |
| } |
| |
| |
| public void writeTo(final OutputStream outstream) throws IOException { |
| if (outstream == null) { |
| throw new IllegalArgumentException("Output stream may not be null"); |
| } |
| if (this.buffer != null) { |
| outstream.write(this.buffer); |
| } else { |
| wrappedEntity.writeTo(outstream); |
| } |
| } |
| |
| |
| // non-javadoc, see interface HttpEntity |
| public boolean isStreaming() { |
| return (buffer == null) && wrappedEntity.isStreaming(); |
| } |
| |
| } // class BufferedHttpEntity |