/*
* Copyright (c) 1998-2008 Caucho Technology -- all rights reserved
*
* This file is part of Resin(R) Open Source
*
* Each copy or derived work must preserve the copyright notice and this
* notice unmodified.
*
* Resin Open Source is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* Resin Open Source is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE, or any warranty
* of NON-INFRINGEMENT. See the GNU General Public License for more
* details.
*
* You should have received a copy of the GNU General Public License
* along with Resin Open Source; if not, write to the
*
* Free Software Foundation, Inc.
* 59 Temple Place, Suite 330
* Boston, MA 02111-1307 USA
*
* @author Nam Nguyen
*/
package com.caucho.quercus.lib.zlib;
import com.caucho.quercus.QuercusModuleException;
import com.caucho.quercus.env.Env;
import com.caucho.quercus.lib.file.BinaryInput;
import com.caucho.quercus.lib.file.ReadStreamInput;
import com.caucho.vfs.*;
import java.io.IOException;
/**
* Input from a compressed stream.
*
*
*/
public class ZlibInputStream extends ReadStreamInput
{
private Env _env;
private BinaryInput _in;
private GZInputStream _gzIn;
public ZlibInputStream(Env env, BinaryInput in) throws IOException
{
super(env);
_env = env;
init(in);
}
protected void init(BinaryInput in)
throws IOException
{
_in = in;
_gzIn = new GZInputStream(in.getInputStream());
ReadStream rs = new ReadStream(new VfsStream(_gzIn, null));
init(rs);
}
/**
* Opens a new copy.
*/
public BinaryInput openCopy()
throws IOException
{
return new ZlibInputStream(_env, _in.openCopy());
}
/**
* Sets the position.
*/
public boolean setPosition(long offset)
{
try {
BinaryInput newIn = _in.openCopy();
/*
_gzIn.close();
getInputStream().close();
_in.close();
_in = null;
_gzIn = null;
*/
close();
_in.close();
init(newIn);
return skip(offset) == offset;
} catch (IOException e) {
throw new QuercusModuleException(e);
}
}
public String toString()
{
return "ZlibInputStream[]";
}
}