1 /* 2 * $Header: /home/jerenkrantz/tmp/commons/commons-convert/cvs/home/cvs/jakarta-commons//httpclient/src/java/org/apache/commons/httpclient/methods/multipart/FilePartSource.java,v 1.10 2004/04/18 23:51:37 jsdever Exp $ 3 * $Revision: 480424 $ 4 * $Date: 2006-11-29 06:56:49 +0100 (Wed, 29 Nov 2006) $ 5 * 6 * ==================================================================== 7 * 8 * Licensed to the Apache Software Foundation (ASF) under one or more 9 * contributor license agreements. See the NOTICE file distributed with 10 * this work for additional information regarding copyright ownership. 11 * The ASF licenses this file to You under the Apache License, Version 2.0 12 * (the "License"); you may not use this file except in compliance with 13 * 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, software 18 * distributed under the License is distributed on an "AS IS" BASIS, 19 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 20 * See the License for the specific language governing permissions and 21 * limitations under the License. 22 * ==================================================================== 23 * 24 * This software consists of voluntary contributions made by many 25 * individuals on behalf of the Apache Software Foundation. For more 26 * information on the Apache Software Foundation, please see 27 * <http://www.apache.org/>. 28 * 29 */ 30 31 package com.android.internal.http.multipart; 32 33 import java.io.ByteArrayInputStream; 34 import java.io.File; 35 import java.io.FileInputStream; 36 import java.io.FileNotFoundException; 37 import java.io.IOException; 38 import java.io.InputStream; 39 40 /** 41 * A PartSource that reads from a File. 42 * 43 * @author <a href="mailto:becke@u.washington.edu">Michael Becke</a> 44 * @author <a href="mailto:mdiggory@latte.harvard.edu">Mark Diggory</a> 45 * @author <a href="mailto:mbowler@GargoyleSoftware.com">Mike Bowler</a> 46 * 47 * @since 2.0 48 */ 49 public class FilePartSource implements PartSource { 50 51 /** File part file. */ 52 private File file = null; 53 54 /** File part file name. */ 55 private String fileName = null; 56 57 /** 58 * Constructor for FilePartSource. 59 * 60 * @param file the FilePart source File. 61 * 62 * @throws FileNotFoundException if the file does not exist or 63 * cannot be read 64 */ FilePartSource(File file)65 public FilePartSource(File file) throws FileNotFoundException { 66 this.file = file; 67 if (file != null) { 68 if (!file.isFile()) { 69 throw new FileNotFoundException("File is not a normal file."); 70 } 71 if (!file.canRead()) { 72 throw new FileNotFoundException("File is not readable."); 73 } 74 this.fileName = file.getName(); 75 } 76 } 77 78 /** 79 * Constructor for FilePartSource. 80 * 81 * @param fileName the file name of the FilePart 82 * @param file the source File for the FilePart 83 * 84 * @throws FileNotFoundException if the file does not exist or 85 * cannot be read 86 */ FilePartSource(String fileName, File file)87 public FilePartSource(String fileName, File file) 88 throws FileNotFoundException { 89 this(file); 90 if (fileName != null) { 91 this.fileName = fileName; 92 } 93 } 94 95 /** 96 * Return the length of the file 97 * @return the length of the file. 98 * @see PartSource#getLength() 99 */ getLength()100 public long getLength() { 101 if (this.file != null) { 102 return this.file.length(); 103 } else { 104 return 0; 105 } 106 } 107 108 /** 109 * Return the current filename 110 * @return the filename. 111 * @see PartSource#getFileName() 112 */ getFileName()113 public String getFileName() { 114 return (fileName == null) ? "noname" : fileName; 115 } 116 117 /** 118 * Return a new {@link FileInputStream} for the current filename. 119 * @return the new input stream. 120 * @throws IOException If an IO problem occurs. 121 * @see PartSource#createInputStream() 122 */ createInputStream()123 public InputStream createInputStream() throws IOException { 124 if (this.file != null) { 125 return new FileInputStream(this.file); 126 } else { 127 return new ByteArrayInputStream(new byte[] {}); 128 } 129 } 130 131 } 132