/** | |
* | |
* Copyright 2004 The Apache Software Foundation | |
* | |
* Licensed under the Apache License, Version 2.0 (the "License"); | |
* you may not use this file except in compliance with the License. | |
* You may obtain a copy of the License at | |
* | |
* http://www.apache.org/licenses/LICENSE-2.0 | |
* | |
* Unless required by applicable law or agreed to in writing, software | |
* distributed under the License is distributed on an "AS IS" BASIS, | |
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | |
* See the License for the specific language governing permissions and | |
* limitations under the License. | |
*/ | |
package org.apache.activeio.adapter; | |
import java.io.IOException; | |
import java.io.InputStream; | |
import org.apache.activeio.Channel; | |
import org.apache.activeio.packet.EOSPacket; | |
import org.apache.activeio.packet.Packet; | |
import org.apache.activeio.packet.sync.SyncChannel; | |
/** | |
* Provides an InputStream for a given SynchChannel. | |
* | |
* @version $Revision$ | |
*/ | |
public class SyncChannelToInputStream extends InputStream { | |
private final SyncChannel channel; | |
private Packet lastPacket; | |
private boolean closed; | |
private long timeout = Channel.WAIT_FOREVER_TIMEOUT; | |
/** | |
* @param channel | |
*/ | |
public SyncChannelToInputStream(final SyncChannel channel) { | |
this.channel = channel; | |
} | |
/** | |
* @see java.io.InputStream#read() | |
*/ | |
public int read() throws IOException { | |
while( true ) { | |
if( lastPacket==null ) { | |
try { | |
lastPacket = channel.read(timeout); | |
} catch (IOException e) { | |
throw (IOException)new IOException("Channel failed: "+e.getMessage()).initCause(e); | |
} | |
} | |
if( lastPacket.hasRemaining() ) { | |
return lastPacket.read(); | |
} | |
} | |
} | |
/** | |
* @see java.io.InputStream#read(byte[], int, int) | |
*/ | |
public int read(byte[] b, int off, int len) throws IOException { | |
while( true ) { | |
if( lastPacket==null || !lastPacket.hasRemaining() ) { | |
try { | |
lastPacket = channel.read(timeout); | |
} catch (IOException e) { | |
throw (IOException)new IOException("Channel failed: "+e.getMessage()).initCause(e); | |
} | |
} | |
if( lastPacket==EOSPacket.EOS_PACKET ) { | |
return -1; | |
} | |
if( lastPacket!=null && lastPacket.hasRemaining() ) { | |
return lastPacket.read(b, off, len); | |
} | |
} | |
} | |
/** | |
* @see java.io.InputStream#close() | |
*/ | |
public void close() throws IOException { | |
closed=true; | |
super.close(); | |
} | |
public boolean isClosed() { | |
return closed; | |
} | |
/** | |
* @param timeout | |
*/ | |
public void setTimeout(long timeout) { | |
if( timeout <= 0 ) | |
timeout = Channel.WAIT_FOREVER_TIMEOUT; | |
this.timeout = timeout; | |
} | |
/** | |
* @return | |
*/ | |
public long getTimeout() { | |
if( timeout == Channel.WAIT_FOREVER_TIMEOUT ) | |
return 0; | |
return timeout; | |
} | |
} |