/*
* $RCSfile: ChannelImageOutputStreamSpi.java,v $
*
*
* Copyright (c) 2005 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 or intended for
* use in the design, construction, operation or maintenance of any
* nuclear facility.
*
* $Revision: 1.1 $
* $Date: 2005/02/11 05:01:53 $
* $State: Exp $
*/
package com.sun.media.imageioimpl.stream;
import java.io.File;
import java.io.OutputStream;
import java.io.IOException;
import java.nio.channels.Channels;
import java.nio.channels.FileChannel;
import java.nio.channels.NonReadableChannelException;
import java.nio.channels.WritableByteChannel;
import java.util.Locale;
import javax.imageio.spi.ImageOutputStreamSpi;
import javax.imageio.stream.FileCacheImageOutputStream;
import javax.imageio.stream.ImageOutputStream;
import javax.imageio.stream.MemoryCacheImageOutputStream;
import com.sun.media.imageio.stream.FileChannelImageOutputStream;
import com.sun.media.imageioimpl.common.PackageUtil;
public class ChannelImageOutputStreamSpi extends ImageOutputStreamSpi {
public ChannelImageOutputStreamSpi() {
super(PackageUtil.getVendor(),
PackageUtil.getVersion(),
WritableByteChannel.class);
}
public ImageOutputStream createOutputStreamInstance(Object output,
boolean useCache,
File cacheDir)
throws IOException {
if(output == null ||
!(output instanceof WritableByteChannel)) {
throw new IllegalArgumentException
("Cannot create ImageOutputStream from "+
output.getClass().getName());
}
ImageOutputStream stream = null;
if(output instanceof FileChannel) {
FileChannel channel = (FileChannel)output;
try {
// The Channel must be readable.
channel.map(FileChannel.MapMode.READ_ONLY,
channel.position(),
1);
stream = new FileChannelImageOutputStream((FileChannel)output);
} catch(NonReadableChannelException nrce) {
// Ignore it.
}
}
if(stream == null) {
OutputStream outStream =
Channels.newOutputStream((WritableByteChannel)output);
if(useCache) {
try {
stream = new FileCacheImageOutputStream(outStream,
cacheDir);
} catch(IOException e) {
// Cache file could not be created.
}
}
if(stream == null) {
stream = new MemoryCacheImageOutputStream(outStream);
}
}
return stream;
}
public String getDescription(Locale locale) {
return "NIO Channel ImageOutputStream";
}
}