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/*
* $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 $
* $Revision: 480424 $
* $Date: 2006-11-29 06:56:49 +0100 (Wed, 29 Nov 2006) $
*
* ====================================================================
*
* 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 com.android.internal.http.multipart;
import java.io.ByteArrayInputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStream;
/**
* A PartSource that reads from a File.
*
* @author <a href="mailto:becke@u.washington.edu">Michael Becke</a>
* @author <a href="mailto:mdiggory@latte.harvard.edu">Mark Diggory</a>
* @author <a href="mailto:mbowler@GargoyleSoftware.com">Mike Bowler</a>
*
* @since 2.0
*/
public class FilePartSource implements PartSource {
/** File part file. */
private File file = null;
/** File part file name. */
private String fileName = null;
/**
* Constructor for FilePartSource.
*
* @param file the FilePart source File.
*
* @throws FileNotFoundException if the file does not exist or
* cannot be read
*/
public FilePartSource(File file) throws FileNotFoundException {
this.file = file;
if (file != null) {
if (!file.isFile()) {
throw new FileNotFoundException("File is not a normal file.");
}
if (!file.canRead()) {
throw new FileNotFoundException("File is not readable.");
}
this.fileName = file.getName();
}
}
/**
* Constructor for FilePartSource.
*
* @param fileName the file name of the FilePart
* @param file the source File for the FilePart
*
* @throws FileNotFoundException if the file does not exist or
* cannot be read
*/
public FilePartSource(String fileName, File file)
throws FileNotFoundException {
this(file);
if (fileName != null) {
this.fileName = fileName;
}
}
/**
* Return the length of the file
* @return the length of the file.
* @see PartSource#getLength()
*/
public long getLength() {
if (this.file != null) {
return this.file.length();
} else {
return 0;
}
}
/**
* Return the current filename
* @return the filename.
* @see PartSource#getFileName()
*/
public String getFileName() {
return (fileName == null) ? "noname" : fileName;
}
/**
* Return a new {@link FileInputStream} for the current filename.
* @return the new input stream.
* @throws IOException If an IO problem occurs.
* @see PartSource#createInputStream()
*/
public InputStream createInputStream() throws IOException {
if (this.file != null) {
return new FileInputStream(this.file);
} else {
return new ByteArrayInputStream(new byte[] {});
}
}
}
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