org.apache.mina.core.file.DefaultFileRegion Maven / Gradle / Ivy
/**
* Copyright 2007-2015, Kaazing Corporation. All rights reserved.
*
* 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.mina.core.file;
import java.io.IOException;
import java.nio.channels.FileChannel;
/**
* TODO Add documentation
*
*
* @author Apache MINA Project
*/
public class DefaultFileRegion implements FileRegion {
private final FileChannel channel;
private final long originalPosition;
private long position;
private long remainingBytes;
public DefaultFileRegion(FileChannel channel) throws IOException {
this(channel, 0, channel.size());
}
public DefaultFileRegion(FileChannel channel, long position, long remainingBytes) {
if (channel == null) {
throw new IllegalArgumentException("channel can not be null");
}
if (position < 0) {
throw new IllegalArgumentException("position may not be less than 0");
}
if (remainingBytes < 0) {
throw new IllegalArgumentException("remainingBytes may not be less than 0");
}
this.channel = channel;
this.originalPosition = position;
this.position = position;
this.remainingBytes = remainingBytes;
}
public long getWrittenBytes() {
return position - originalPosition;
}
public long getRemainingBytes() {
return remainingBytes;
}
public FileChannel getFileChannel() {
return channel;
}
public long getPosition() {
return position;
}
public void update(long value) {
position += value;
remainingBytes -= value;
}
}