Android example source code file (FilePartSource.java)

This example Android source code file (FilePartSource.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Android by Example" ^TM.

Java - Android tags/keywords

bytearrayinputstream, file, filenotfoundexception, filepartsource, io, ioexception, string

The FilePartSource.java Android example source code

/*
 * $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
 * @author <a href="mailto:mdiggory@latte.harvard.edu">Mark Diggory
 * @author <a href="mailto:mbowler@GargoyleSoftware.com">Mike Bowler
 *   
 * @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[] {});
        }
    }

}