code: /*
   * Copyright 2012-2018 Chronicle Map Contributors
   *
   * Licensed 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 net.openhft.chronicle.map.impl.stage.data;
  
  import net.openhft.chronicle.bytes.BytesStore;
  import net.openhft.chronicle.bytes.RandomDataInput;
  import net.openhft.chronicle.core.OS;
  import net.openhft.chronicle.core.io.ReferenceChangeListener;
  import net.openhft.chronicle.core.io.ReferenceOwner;
  import org.jetbrains.annotations.NotNull;
  import org.jetbrains.annotations.Nullable;
  
  import java.nio.BufferOverflowException;
  import java.nio.ByteBuffer;
  
  public enum ZeroBytesStore implements BytesStore<ZeroBytesStore, Void> {
      INSTANCE;
  
      @Override
      public long addressForWrite(long offset) throws UnsupportedOperationException, BufferOverflowException {
          throw new UnsupportedOperationException("Cannot get the address of nothing");
      }
  
      @Override
      public long addressForWritePosition() throws UnsupportedOperationException, BufferOverflowException {
          throw new UnsupportedOperationException("Cannot get the address of nothing");
      }
  
      @Override
      public int peekUnsignedByte(long offset) {
          return 0;
      }
  
      @Override
      public byte readVolatileByte(long offset) {
          return 0;
      }
  
      @Override
      public short readVolatileShort(long offset) {
          return 0;
      }
  
      @Override
      public int readVolatileInt(long offset) {
          return 0;
      }
  
      @Override
      public long readVolatileLong(long offset) {
          return 0;
      }
  
      @Override
      public boolean isDirectMemory() {
          return false;
      }
  
      @Override
      public byte readByte(long offset) {
          return 0;
      }
  
      @Override
      public short readShort(long offset) {
          return 0;
      }
  
      @Override
      public int readInt(long offset) {
          return 0;
      }
  
      @Override
      public long readLong(long offset) {
          return 0;
      }
  
      @Override
      public float readFloat(long offset) {
          return 0;
      }
  
      @Override
      public double readDouble(long offset) {
          return 0;
      }
  
      @Override
      public void nativeRead(long position, long address, long size) {
          OS.memory().setMemory(address, size, (byte) 0);
      }
  
      @Override
      public boolean sharedMemory() {
          return false;
      }
  
      @Override
      public ZeroBytesStore copy() {
          throw new UnsupportedOperationException();
      }
  
      @Override
      public long capacity() {
          return Long.MAX_VALUE;
      }
  
      @Nullable
      @Override
      public Void underlyingObject() {
          throw new UnsupportedOperationException();
      }
  
      @Override
  
      public void move(long from, long to, long length) {
          if (length != 0)
              throw new UnsupportedOperationException();
      }
  
      @Override
      public long addressForRead(long offset) {
          return offset;
      }
  
      @Override
      public boolean compareAndSwapInt(long offset, int expected, int value) {
          if (expected != 0 || value != 0)
              throw new UnsupportedOperationException();
          return true;
      }
  
      @Override
      public void testAndSetInt(long offset, int expected, int value) {
          if (expected != 0 || value != 0)
              throw new UnsupportedOperationException();
      }
  
      @Override
      public boolean compareAndSwapLong(long offset, long expected, long value) {
          if (expected != 0 || value != 0)
              throw new UnsupportedOperationException();
          return true;
      }
  
      @Override
      public byte[] internalNumberBuffer() {
          throw new UnsupportedOperationException();
      }
  
      @Override
      public void reserve(ReferenceOwner id) throws IllegalStateException {
      }
  
      @Override
      public boolean tryReserve(ReferenceOwner id) throws IllegalStateException {
          return false;
      }
  
      @Override
      public boolean reservedBy(ReferenceOwner owner) {
          return true;
      }
  
      @Override
      public void release(ReferenceOwner id) throws IllegalStateException {
      }
  
      @Override
      public void releaseLast(ReferenceOwner id) throws IllegalStateException {
      }
  
      @Override
      public int refCount() {
          return 1;
      }
  
      @Override
      public void addReferenceChangeListener(ReferenceChangeListener referenceChangeListener) {
      }
  
      @Override
      public void removeReferenceChangeListener(ReferenceChangeListener referenceChangeListener) {
      }
  
      @NotNull
      @Override
      public ZeroBytesStore writeByte(long l, byte b) {
          throw new UnsupportedOperationException();
      }
  
      @NotNull
      @Override
      public ZeroBytesStore writeShort(long l, short i) {
          throw new UnsupportedOperationException();
      }
  
      @NotNull
      @Override
      public ZeroBytesStore writeInt(long l, int i) {
          throw new UnsupportedOperationException();
      }
  
      @NotNull
      @Override
      public ZeroBytesStore writeOrderedInt(long l, int i) {
          throw new UnsupportedOperationException();
      }
  
      @NotNull
      @Override
      public ZeroBytesStore writeLong(long l, long l1) {
          throw new UnsupportedOperationException();
      }
  
      @NotNull
      @Override
      public ZeroBytesStore writeOrderedLong(long l, long l1) {
          throw new UnsupportedOperationException();
      }
  
      @NotNull
      @Override
      public ZeroBytesStore writeFloat(long l, float v) {
          throw new UnsupportedOperationException();
      }
  
      @NotNull
      @Override
      public ZeroBytesStore writeDouble(long l, double v) {
          throw new UnsupportedOperationException();
      }
  
      @NotNull
      @Override
      public ZeroBytesStore writeVolatileByte(long l, byte b) {
          throw new UnsupportedOperationException();
      }
  
      @NotNull
      @Override
      public ZeroBytesStore writeVolatileShort(long l, short i) {
          throw new UnsupportedOperationException();
      }
  
      @NotNull
      @Override
      public ZeroBytesStore writeVolatileInt(long l, int i) {
          throw new UnsupportedOperationException();
      }
  
      @NotNull
      @Override
      public ZeroBytesStore writeVolatileLong(long l, long l1) {
          throw new UnsupportedOperationException();
      }
  
      @NotNull
      @Override
      public ZeroBytesStore write(long l, byte[] bytes, int i, int i1) {
          throw new UnsupportedOperationException();
      }
  
      @Override
      public void write(long l, ByteBuffer byteBuffer, int i, int i1) {
          throw new UnsupportedOperationException();
      }
  
      @NotNull
      @Override
      public ZeroBytesStore write(long l, RandomDataInput randomDataInput, long l1, long l2) {
          throw new UnsupportedOperationException();
      }
  
      @Override
      public void nativeWrite(long l, long l1, long l2) {
          throw new UnsupportedOperationException();
      }
  
      @Override
      public long write8bit(long position, BytesStore bs) {
          throw new UnsupportedOperationException();
      }
  
      @Override
      public long write8bit(long position, String s, int start, int length) {
          throw new UnsupportedOperationException();
      }
  }