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package org.apache.lucene.store.bytebuffer;
/**
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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.
*/
import java.nio.ByteBuffer;
import java.util.ArrayList;
import java.util.List;
import java.util.concurrent.atomic.AtomicInteger;
/**
*/
public class ByteBufferFile {
final ByteBufferDirectory dir;
final int bufferSize;
final List<ByteBuffer> buffers;
long length;
volatile long lastModified = System.currentTimeMillis();
final AtomicInteger refCount;
long sizeInBytes;
public ByteBufferFile(ByteBufferDirectory dir, int bufferSize) {
this.dir = dir;
this.bufferSize = bufferSize;
this.buffers = new ArrayList<ByteBuffer>();
this.refCount = new AtomicInteger(1);
}
ByteBufferFile(ByteBufferFile file) {
this.dir = file.dir;
this.bufferSize = file.bufferSize;
this.buffers = file.buffers;
this.length = file.length;
this.lastModified = file.lastModified;
this.refCount = file.refCount;
this.sizeInBytes = file.sizeInBytes;
}
public long getLength() {
return length;
}
public long getLastModified() {
return lastModified;
}
void setLastModified(long lastModified) {
this.lastModified = lastModified;
}
long sizeInBytes() {
return sizeInBytes;
}
ByteBuffer getBuffer(int index) {
return buffers.get(index);
}
int numBuffers() {
return buffers.size();
}
void delete() {
decRef();
}
void incRef() {
refCount.incrementAndGet();
}
void decRef() {
if (refCount.decrementAndGet() == 0) {
length = 0;
for (ByteBuffer buffer : buffers) {
dir.releaseBuffer(buffer);
}
buffers.clear();
sizeInBytes = 0;
}
}
}
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