/*
* @(#)FileContent.java 1.2 04/07/26
*
* Copyright (c) 2004 Sun Microsystems, Inc. All Rights Reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* -Redistribution of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
*
* -Redistribution 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.
*
* Neither the name of Sun Microsystems, Inc. or the names of contributors may
* be used to endorse or promote products derived from this software without
* specific prior written permission.
*
* This software is provided "AS IS," without a warranty of any kind. ALL
* EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES, INCLUDING
* ANY IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE
* OR NON-INFRINGEMENT, ARE HEREBY EXCLUDED. SUN MIDROSYSTEMS, INC. ("SUN")
* AND ITS LICENSORS SHALL NOT BE LIABLE FOR ANY DAMAGES SUFFERED BY LICENSEE
* AS A RESULT OF USING, MODIFYING OR DISTRIBUTING THIS SOFTWARE OR ITS
* DERIVATIVES. IN NO EVENT WILL SUN OR ITS LICENSORS BE LIABLE FOR ANY LOST
* REVENUE, PROFIT OR DATA, OR FOR DIRECT, INDIRECT, SPECIAL, CONSEQUENTIAL,
* INCIDENTAL OR PUNITIVE DAMAGES, HOWEVER CAUSED AND REGARDLESS OF THE THEORY
* OF LIABILITY, ARISING OUT OF THE USE OF OR INABILITY TO USE THIS SOFTWARE,
* EVEN IF SUN HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
*
* You acknowledge that this software is not designed, licensed or intended
* for use in the design, construction, operation or maintenance of any
* nuclear facility.
*/
import java.io.*;
import java.net.*;
import java.nio.channels.*;
import java.nio.charset.*;
/**
* A Content type that provides for transferring files.
*
* @author Mark Reinhold
* @author Brad R. Wetmore
* @version 1.2, 04/07/26
*/
class FileContent implements Content {
private static File ROOT = new File("root");
private File fn;
FileContent(URI uri) {
fn = new File(ROOT,
uri.getPath()
.replace('/',
File.separatorChar));
}
private String type = null;
public String type() {
if (type != null)
return type;
String nm = fn.getName();
if (nm.endsWith(".html"))
type = "text/html; charset=iso-8859-1";
else if ((nm.indexOf('.') < 0) || nm.endsWith(".txt"))
type = "text/plain; charset=iso-8859-1";
else
type = "application/octet-stream";
return type;
}
private FileChannel fc = null;
private long length = -1;
private long position = -1; // NB only; >= 0 if transferring
public long length() {
return length;
}
public void prepare() throws IOException {
if (fc == null)
fc = new RandomAccessFile(fn, "r").getChannel();
length = fc.size();
position = 0; // NB only
}
public boolean send(ChannelIO cio) throws IOException {
if (fc == null)
throw new IllegalStateException();
if (position < 0) // NB only
throw new IllegalStateException();
/*
* Short-circuit if we're already done.
*/
if (position >= length) {
return false;
}
position += cio.transferTo(fc, position, length - position);
return (position < length);
}
public void release() throws IOException {
if (fc != null) {
fc.close();
fc = null;
}
}
}
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