content: /*
   * 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 com.datastax.dse.driver.internal.core.graph.binary.buffer;
  
  import io.netty.buffer.ByteBuf;
  import io.netty.buffer.ByteBufAllocator;
  import io.netty.buffer.CompositeByteBuf;
  import io.netty.buffer.Unpooled;
  import io.netty.buffer.UnpooledByteBufAllocator;
  import java.nio.ByteBuffer;
  import java.util.function.Supplier;
  import org.apache.tinkerpop.gremlin.structure.io.Buffer;
  import org.apache.tinkerpop.gremlin.structure.io.BufferFactory;
  
  /**
   * Internal BufferFactory impl for creation of Tinkerpop buffers. We implement an internal type here
   * to allow for this class to use shaded Netty types (without bringing all of Tinkerpop into the
   * shaded JAR). The impl is based on the initial impl of {@code
   * org.apache.tinkerpop.gremlin.driver.ser.NettyBufferFactory} but we don't guarantee that this
   * class will mirror changes to that class over time.
   */
  public class DseNettyBufferFactory implements BufferFactory<ByteBuf> {
  
    private static final ByteBufAllocator DEFAULT_ALLOCATOR = new UnpooledByteBufAllocator(false);
  
    private final ByteBufAllocator allocator;
  
    public DseNettyBufferFactory() {
      this.allocator = DEFAULT_ALLOCATOR;
    }
  
    public DseNettyBufferFactory(ByteBufAllocator allocator) {
      this.allocator = allocator;
    }
  
    @Override
    public Buffer create(final ByteBuf value) {
      return new DseNettyBuffer(value);
    }
  
    @Override
    public Buffer wrap(final ByteBuffer value) {
      return create(Unpooled.wrappedBuffer(value));
    }
  
    public Buffer heap() {
      return create(allocator.heapBuffer());
    }
  
    public Buffer heap(int initialSize) {
      return create(allocator.heapBuffer(initialSize));
    }
  
    public Buffer heap(int initialSize, int maxSize) {
      return create(allocator.heapBuffer(initialSize, maxSize));
    }
  
    public Buffer io() {
      return create(allocator.ioBuffer());
    }
  
    public Buffer io(int initialSize) {
      return create(allocator.ioBuffer(initialSize));
    }
  
    public Buffer io(int initialSize, int maxSize) {
      return create(allocator.ioBuffer(initialSize, maxSize));
    }
  
    public Buffer direct() {
      return create(allocator.directBuffer());
    }
  
    public Buffer direct(int initialSize) {
      return create(allocator.directBuffer(initialSize));
    }
  
    public Buffer direct(int initialSize, int maxSize) {
      return create(allocator.directBuffer(initialSize, maxSize));
    }
  
    public Buffer composite(ByteBuf... components) {
  
      CompositeByteBuf buff = allocator.compositeBuffer(components.length);
      buff.addComponents(components);
      return create(buff);
    }
  
    public Buffer composite(Buffer... components) {
      ByteBuf[] nettyBufs = new ByteBuf[components.length];
      for (int i = 0; i < components.length; ++i) {
        if (!(components[i] instanceof DseNettyBuffer)) {
          throw new IllegalArgumentException("Can only concatenate DseNettyBuffer instances");
        }
        nettyBufs[i] = ((DseNettyBuffer) components[i]).getUnderlyingBuffer();
      }
      return composite(nettyBufs);
    }
  
    public Buffer withBytes(int... bytes) {
      return withBytes(this::heap, bytes);
    }
  
    public Buffer withBytes(Supplier<Buffer> supplier, int... bytes) {
      Buffer buff = supplier.get();
      for (int val : bytes) {
        buff.writeByte(val);
      }
      return buff;
    }
  }
  