code: /*
   * 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.datasketches.memory.internal;
  
  import java.nio.ByteOrder;
  
  import org.apache.datasketches.memory.WritableBuffer;
  
  /**
   * Implementation of {@link WritableBuffer} for map memory, non-native byte order.
   *
   * @author Roman Leventov
   * @author Lee Rhodes
   */
  final class MapNonNativeWritableBufferImpl extends NonNativeWritableBufferImpl {
    private final AllocateDirectWritableMap dirWMap;
  
    MapNonNativeWritableBufferImpl(
        final AllocateDirectWritableMap dirWMap,
        final long offsetBytes,
        final long capacityBytes,
        final int typeId,
        final long cumOffsetBytes) {
      super(capacityBytes);
      this.dirWMap = dirWMap;
      this.offsetBytes = offsetBytes;
      this.capacityBytes = capacityBytes;
      this.typeId = removeNnBuf(typeId) | MAP | BUFFER | NONNATIVE;
      this.cumOffsetBytes = cumOffsetBytes;
      if ((this.owner != null) && (this.owner != Thread.currentThread())) {
        throw new IllegalStateException(THREAD_EXCEPTION_TEXT);
      }
      this.owner = Thread.currentThread();
    }
  
    @Override
    BaseWritableBufferImpl toWritableRegion(
        final long regionOffsetBytes,
        final long capacityBytes,
        final boolean readOnly,
        final ByteOrder byteOrder) {
      final long newOffsetBytes = offsetBytes + regionOffsetBytes;
      final long newCumOffsetBytes = cumOffsetBytes + regionOffsetBytes;
      int typeIdOut = removeNnBuf(typeId) | MAP | REGION | (readOnly ? READONLY : 0);
  
      if (Util.isNativeByteOrder(byteOrder)) {
        typeIdOut |= NATIVE;
        return new MapWritableBufferImpl(
            dirWMap, newOffsetBytes, capacityBytes, typeIdOut, newCumOffsetBytes);
      } else {
        typeIdOut |= NONNATIVE;
        return new MapNonNativeWritableBufferImpl(
            dirWMap, newOffsetBytes, capacityBytes, typeIdOut, newCumOffsetBytes);
      }
    }
  
    @Override
    BaseWritableMemoryImpl toWritableMemory(final boolean readOnly, final ByteOrder byteOrder) {
      int typeIdOut = removeNnBuf(typeId) | MEMORY | (readOnly ? READONLY : 0);
  
      if (byteOrder == ByteOrder.nativeOrder()) {
        typeIdOut |= NATIVE;
        return new MapWritableMemoryImpl(
            dirWMap, offsetBytes, capacityBytes, typeIdOut, cumOffsetBytes);
      } else {
        typeIdOut |= NONNATIVE;
        return new MapNonNativeWritableMemoryImpl(
            dirWMap, offsetBytes, capacityBytes, typeIdOut, cumOffsetBytes);
      }
    }
  
    @Override
    BaseWritableBufferImpl toDuplicate(final boolean readOnly, final ByteOrder byteOrder) {
      int typeIdOut = removeNnBuf(typeId) | BUFFER | DUPLICATE | (readOnly ? READONLY : 0);
  
      if (byteOrder == ByteOrder.nativeOrder()) {
        typeIdOut |= NATIVE;
        return new MapWritableBufferImpl(
            dirWMap, offsetBytes, capacityBytes, typeIdOut, cumOffsetBytes);
      } else {
        typeIdOut |= NONNATIVE;
        return new MapNonNativeWritableBufferImpl(
            dirWMap, offsetBytes, capacityBytes, typeIdOut, cumOffsetBytes);
      }
    }
  
    @Override
    public void close() {
      checkValid();
      checkThread(owner);
      dirWMap.close(); //checksValidAndThread
    }
  
    @Override
    public void force() {
      checkValid();
      checkThread(owner);
      checkNotReadOnly();
      dirWMap.force(); //checksValidAndThread
    }
  
    @Override
    Object getUnsafeObject() {
      return null;
    }
  
    @Override
    public boolean isLoaded() {
      checkValid();
      checkThread(owner);
      return dirWMap.isLoaded(); //checksValidAndThread
    }
  
    @Override
    public boolean isValid() {
      return dirWMap.getValid().get();
    }
  
    @Override
    public void load() {
      checkValid();
      checkThread(owner);
      dirWMap.load(); //checksValidAndThread
    }
  
  }
  