/*
* 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.spark.network.buffer;
import java.io.IOException;
import java.io.InputStream;
import java.nio.ByteBuffer;
import com.google.common.base.Objects;
import io.netty.buffer.ByteBufInputStream;
import io.netty.buffer.Unpooled;
/**
* A {@link ManagedBuffer} backed by {@link ByteBuffer}.
*/
public final class NioManagedBuffer extends ManagedBuffer {
private final ByteBuffer buf;
public NioManagedBuffer(ByteBuffer buf) {
this.buf = buf;
}
@Override
public long size() {
return buf.remaining();
}
@Override
public ByteBuffer nioByteBuffer() throws IOException {
return buf.duplicate();
}
@Override
public InputStream createInputStream() throws IOException {
return new ByteBufInputStream(Unpooled.wrappedBuffer(buf));
}
@Override
public ManagedBuffer retain() {
return this;
}
@Override
public ManagedBuffer release() {
return this;
}
@Override
public Object convertToNetty() throws IOException {
return Unpooled.wrappedBuffer(buf);
}
@Override
public String toString() {
return Objects.toStringHelper(this)
.add("buf", buf)
.toString();
}
}