/*
* Copyright (c) 2001-2004 Caucho Technology, Inc. All rights reserved.
*
* The Apache Software License, Version 1.1
*
* 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 acknowlegement:
* "This product includes software developed by the
* Caucho Technology (http://www.caucho.com/)."
* Alternately, this acknowlegement may appear in the software itself,
* if and wherever such third-party acknowlegements normally appear.
*
* 4. The names "Hessian", "Resin", and "Caucho" must not be used to
* endorse or promote products derived from this software without prior
* written permission. For written permission, please contact
* info@caucho.com.
*
* 5. Products derived from this software may not be called "Resin"
* nor may "Resin" appear in their names without prior written
* permission of Caucho Technology.
*
* 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 CAUCHO TECHNOLOGY 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.
*
* @author Scott Ferguson
*/
package com.caucho.hessian4.io;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.util.zip.DeflaterOutputStream;
import java.util.zip.InflaterInputStream;
public class Deflation extends HessianEnvelope {
public Deflation()
{
}
public Hessian2Output wrap(Hessian2Output out)
throws IOException
{
OutputStream os = new DeflateOutputStream(out);
Hessian2Output filterOut = new Hessian2Output(os);
filterOut.setCloseStreamOnClose(true);
return filterOut;
}
public Hessian2Input unwrap(Hessian2Input in)
throws IOException
{
int version = in.readEnvelope();
String method = in.readMethod();
if (! method.equals(getClass().getName()))
throw new IOException("expected hessian Envelope method '" +
getClass().getName() + "' at '" + method + "'");
return unwrapHeaders(in);
}
public Hessian2Input unwrapHeaders(Hessian2Input in)
throws IOException
{
InputStream is = new DeflateInputStream(in);
Hessian2Input filter = new Hessian2Input(is);
filter.setCloseStreamOnClose(true);
return filter;
}
static class DeflateOutputStream extends OutputStream {
private Hessian2Output _out;
private OutputStream _bodyOut;
private DeflaterOutputStream _deflateOut;
DeflateOutputStream(Hessian2Output out)
throws IOException
{
_out = out;
_out.startEnvelope(Deflation.class.getName());
_out.writeInt(0);
_bodyOut = _out.getBytesOutputStream();
_deflateOut = new DeflaterOutputStream(_bodyOut);
}
public void write(int ch)
throws IOException
{
_deflateOut.write(ch);
}
public void write(byte []buffer, int offset, int length)
throws IOException
{
_deflateOut.write(buffer, offset, length);
}
public void close()
throws IOException
{
Hessian2Output out = _out;
_out = null;
if (out != null) {
_deflateOut.close();
_bodyOut.close();
out.writeInt(0);
out.completeEnvelope();
out.close();
}
}
}
static class DeflateInputStream extends InputStream {
private Hessian2Input _in;
private InputStream _bodyIn;
private InflaterInputStream _inflateIn;
DeflateInputStream(Hessian2Input in)
throws IOException
{
_in = in;
int len = in.readInt();
if (len != 0)
throw new IOException("expected no headers");
_bodyIn = _in.readInputStream();
_inflateIn = new InflaterInputStream(_bodyIn);
}
public int read()
throws IOException
{
return _inflateIn.read();
}
public int read(byte []buffer, int offset, int length)
throws IOException
{
return _inflateIn.read(buffer, offset, length);
}
public void close()
throws IOException
{
Hessian2Input in = _in;
_in = null;
if (in != null) {
_inflateIn.close();
_bodyIn.close();
int len = in.readInt();
if (len != 0)
throw new IOException("Unexpected footer");
in.completeEnvelope();
in.close();
}
}
}
}