1 /* 2 * $HeadURL: http://svn.apache.org/repos/asf/httpcomponents/httpcore/trunk/module-main/src/main/java/org/apache/http/entity/FileEntity.java $ 3 * $Revision: 604625 $ 4 * $Date: 2007-12-16 06:11:11 -0800 (Sun, 16 Dec 2007) $ 5 * 6 * ==================================================================== 7 * Licensed to the Apache Software Foundation (ASF) under one 8 * or more contributor license agreements. See the NOTICE file 9 * distributed with this work for additional information 10 * regarding copyright ownership. The ASF licenses this file 11 * to you under the Apache License, Version 2.0 (the 12 * "License"); you may not use this file except in compliance 13 * with the License. You may obtain a copy of the License at 14 * 15 * http://www.apache.org/licenses/LICENSE-2.0 16 * 17 * Unless required by applicable law or agreed to in writing, 18 * software distributed under the License is distributed on an 19 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY 20 * KIND, either express or implied. See the License for the 21 * specific language governing permissions and limitations 22 * under the License. 23 * ==================================================================== 24 * 25 * This software consists of voluntary contributions made by many 26 * individuals on behalf of the Apache Software Foundation. For more 27 * information on the Apache Software Foundation, please see 28 * <http://www.apache.org/>. 29 * 30 */ 31 32 package org.apache.http.entity; 33 34 import java.io.File; 35 import java.io.FileInputStream; 36 import java.io.IOException; 37 import java.io.InputStream; 38 import java.io.OutputStream; 39 40 /** 41 * An entity whose content is retrieved from a file. 42 * 43 * @author <a href="mailto:oleg at ural.ru">Oleg Kalnichevski</a> 44 * 45 * @version $Revision: 604625 $ 46 * 47 * @since 4.0 48 */ 49 public class FileEntity extends AbstractHttpEntity implements Cloneable { 50 51 protected final File file; 52 FileEntity(final File file, final String contentType)53 public FileEntity(final File file, final String contentType) { 54 super(); 55 if (file == null) { 56 throw new IllegalArgumentException("File may not be null"); 57 } 58 this.file = file; 59 setContentType(contentType); 60 } 61 isRepeatable()62 public boolean isRepeatable() { 63 return true; 64 } 65 getContentLength()66 public long getContentLength() { 67 return this.file.length(); 68 } 69 getContent()70 public InputStream getContent() throws IOException { 71 return new FileInputStream(this.file); 72 } 73 writeTo(final OutputStream outstream)74 public void writeTo(final OutputStream outstream) throws IOException { 75 if (outstream == null) { 76 throw new IllegalArgumentException("Output stream may not be null"); 77 } 78 InputStream instream = new FileInputStream(this.file); 79 try { 80 byte[] tmp = new byte[4096]; 81 int l; 82 while ((l = instream.read(tmp)) != -1) { 83 outstream.write(tmp, 0, l); 84 } 85 outstream.flush(); 86 } finally { 87 instream.close(); 88 } 89 } 90 91 /** 92 * Tells that this entity is not streaming. 93 * 94 * @return <code>false</code> 95 */ isStreaming()96 public boolean isStreaming() { 97 return false; 98 } 99 clone()100 public Object clone() throws CloneNotSupportedException { 101 // File instance is considered immutable 102 // No need to make a copy of it 103 return super.clone(); 104 } 105 106 } // class FileEntity 107