org.apache.tomcat.util.buf.ByteBufferHolder Maven / Gradle / Ivy
/*
* 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.
*/
package org.apache.tomcat.util.buf;
import java.nio.ByteBuffer;
import java.util.concurrent.atomic.AtomicBoolean;
/**
* Simple wrapper for a {@link ByteBuffer} that remembers if the buffer has been
* flipped or not.
*/
public class ByteBufferHolder {
private final ByteBuffer buf;
private final AtomicBoolean flipped;
public ByteBufferHolder(ByteBuffer buf, boolean flipped) {
this.buf = buf;
this.flipped = new AtomicBoolean(flipped);
}
public ByteBuffer getBuf() {
return buf;
}
public boolean isFlipped() {
return flipped.get();
}
public boolean flip() {
if (flipped.compareAndSet(false, true)) {
buf.flip();
return true;
} else {
return false;
}
}
}