/*
 * 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.cassandra.io.util;

import java.io.IOException;
import java.nio.BufferOverflowException;
import java.nio.ByteBuffer;


An implementation of the DataOutputStream interface using a FastByteArrayOutputStream and exposing
its buffer so copies can be avoided. This version does not expand if it runs out of capacity and
throws BufferOverflowException instead.
This class is completely thread unsafe.
/**
 * An implementation of the DataOutputStream interface using a FastByteArrayOutputStream and exposing
 * its buffer so copies can be avoided. This version does not expand if it runs out of capacity and
 * throws BufferOverflowException instead.
 *
 * This class is completely thread unsafe.
 */
public class DataOutputBufferFixed extends DataOutputBuffer
{
    public DataOutputBufferFixed()
    {
        this(128);
    }

    public DataOutputBufferFixed(int size)
    {
        super(size);
    }

    public DataOutputBufferFixed(ByteBuffer buffer)
    {
        super(buffer);
    }

    @Override
    protected void doFlush(int count) throws IOException
    {
        throw new BufferOverflowException();
    }

    /*
     * Not currently reachable (all paths hit doFLush first), but in the spirit of things this should throw
     * if it is called.
     * @see org.apache.cassandra.io.util.DataOutputBuffer#reallocate(long)
     */
    @Override
    protected void expandToFit(long newSize)
    {
        throw new BufferOverflowException();
    }

    public void clear()
    {
        buffer.clear();
    }
}