/*
* Created on 17-Jan-2006
* Created by Paul Gardner
* Copyright (C) 2006 Aelitis, All Rights Reserved.
*
* This program 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.
* This program 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. See the
* GNU General Public License for more details.
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*
* AELITIS, SAS au capital de 46,603.30 euros
* 8 Allee Lenotre, La Grille Royale, 78600 Le Mesnil le Roi, France.
*
*/
package com.aelitis.azureus.core.networkmanager.impl;
import java.io.IOException;
import java.nio.ByteBuffer;
public class
TransportHelperFilterTransparent
implements TransportHelperFilter
{
private TransportHelper transport;
private boolean is_plain;
private ByteBuffer read_insert;
public
TransportHelperFilterTransparent(
TransportHelper _transport,
boolean _is_plain )
{
transport = _transport;
is_plain = _is_plain;
}
protected void
insertRead(
ByteBuffer _read_insert )
{
read_insert = _read_insert;
}
public boolean
hasBufferedWrite()
{
return( transport.hasDelayedWrite());
}
public boolean
hasBufferedRead()
{
return( read_insert != null && read_insert.remaining() > 0 );
}
public long
write(
ByteBuffer[] buffers,
int array_offset,
int length )
throws IOException
{
return( transport.write( buffers, array_offset, length ));
}
public int
write(
ByteBuffer buffer,
boolean partial_write )
throws IOException
{
return( transport.write( buffer, partial_write ));
}
public long
read(
ByteBuffer[] buffers,
int array_offset,
int length )
throws IOException
{
int len = 0;
if ( read_insert != null ){
int pos_before = read_insert.position();
for (int i=array_offset;i<array_offset+length;i++){
ByteBuffer buffer = buffers[i];
int space = buffer.remaining();
if ( space > 0 ){
if ( space < read_insert.remaining()){
int old_limit = read_insert.limit();
read_insert.limit( read_insert.position() + space );
buffer.put( read_insert );
read_insert.limit( old_limit );
}else{
buffer.put( read_insert );
}
if ( !read_insert.hasRemaining()){
break;
}
}
}
len = read_insert.position() - pos_before;
if ( read_insert.hasRemaining()){
return( len );
}else{
read_insert = null;
}
}
return( len + transport.read( buffers, array_offset, length ));
}
public int
read(
ByteBuffer buffer )
throws IOException
{
if ( read_insert != null ){
return((int)read( new ByteBuffer[]{ buffer }, 0, 1 ));
}
return( transport.read( buffer ));
}
public TransportHelper
getHelper()
{
return( transport );
}
public void
setTrace(
boolean on )
{
transport.setTrace( on );
}
public boolean
isEncrypted()
{
return( false );
}
public String
getName(boolean verbose)
{
String proto_str = getHelper().getName(verbose);
if ( proto_str.length() > 0 ){
proto_str = " (" + proto_str + ")";
}
return((is_plain?"Plain":"None") + proto_str );
}
}