/* * 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.ByteBuffer; import org.apache.cassandra.utils.ByteBufferUtil; /** * An implementation of the DataOutputStream interface using a FastByteArrayOutputStream and exposing * its buffer so copies can be avoided. * * This class is completely thread unsafe. */ public final class DataOutputByteBuffer extends AbstractDataOutput { final ByteBuffer buffer; public DataOutputByteBuffer(ByteBuffer buffer) { this.buffer = buffer; } @Override public void write(int b) { buffer.put((byte) b); } @Override public void write(byte[] b, int off, int len) { buffer.put(b, off, len); } public void write(ByteBuffer buffer) throws IOException { int len = buffer.remaining(); ByteBufferUtil.arrayCopy(buffer, buffer.position(), this.buffer, this.buffer.position(), len); this.buffer.position(this.buffer.position() + len); } }