/*
* Copyright (c) 2001-2007 Sun Microsystems, Inc. All rights reserved.
*
* The Sun Project JXTA(TM) Software License
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* 3. The end-user documentation included with the redistribution, if any, must
* include the following acknowledgment: "This product includes software
* developed by Sun Microsystems, Inc. for JXTA(TM) technology."
* Alternately, this acknowledgment may appear in the software itself, if
* and wherever such third-party acknowledgments normally appear.
*
* 4. The names "Sun", "Sun Microsystems, Inc.", "JXTA" and "Project JXTA" must
* not be used to endorse or promote products derived from this software
* without prior written permission. For written permission, please contact
* Project JXTA at http://www.jxta.org.
*
* 5. Products derived from this software may not be called "JXTA", nor may
* "JXTA" appear in their name, without prior written permission of Sun.
*
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED WARRANTIES,
* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
* FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL SUN
* MICROSYSTEMS OR ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA,
* OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
* EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* JXTA is a registered trademark of Sun Microsystems, Inc. in the United
* States and other countries.
*
* Please see the license information page at :
* <http://www.jxta.org/project/www/license.html> for instructions on use of
* the license in source files.
*
* ====================================================================
*
* This software consists of voluntary contributions made by many individuals
* on behalf of Project JXTA. For more information on Project JXTA, please see
* http://www.jxta.org.
*
* This license is based on the BSD license adopted by the Apache Foundation.
*/
package net.jxta.document;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
/**
* This class presents a Document interface for a specific file on disk.
*/
public class FileDocument implements Document {
private final static int BUFFER_SIZE = 4096;
/**
* File which backs this document.
*/
private final File file;
/**
* MIME media type of this document.
**/
private final MimeMediaType type;
/**
* Create a new File Document.
**/
public FileDocument(File file) {
this(file, StructuredDocumentFactory.getMimeTypeForFileExtension(getFileExtension(file)));
}
/**
* Create a new File Document.
*/
public FileDocument(File file, MimeMediaType type) {
if (file.isDirectory()) {
throw(new IllegalArgumentException("File cannot be a directory"));
}
if (!file.exists()) {
throw(new IllegalArgumentException("File must exist"));
}
this.file = file;
this.type = type.intern();
}
/**
* {@inheritDoc}
*
* @return everything after the last '.' in the filename, or if the
* file has no extension, will return a default file extension for the
* MIME media type of this document.
*/
public String getFileExtension() {
String result = getFileExtension(file);
if (result == null) {
result = StructuredDocumentFactory.getFileExtensionForMimeType(type);
}
return result;
}
/**
* Returns everything after the last '.' in the filename, or null
* if the file name does not contain a '.'.
*/
private static String getFileExtension(File file) {
String fileName = file.getName();
int idx = fileName.lastIndexOf('.');
if (idx < 0 || idx == fileName.length()) {
return null;
} else {
return fileName.substring(idx + 1);
}
}
/**
* {@inheritDoc}
**/
public MimeMediaType getMimeType() {
return type;
}
/**
* {@inheritDoc}
**/
public InputStream getStream() throws IOException {
return new FileInputStream(file);
}
/**
* {@inheritDoc}
**/
public void sendToStream(OutputStream sink) throws IOException {
InputStream source = getStream();
int c;
byte[] buf = new byte[BUFFER_SIZE];
do {
c = source.read(buf);
if (-1 == c) {
break;
}
sink.write(buf, 0, c);
} while (true);
}
}