platform/util/src/com/intellij/openapi/util/io/BufferExposingByteArrayOutputStream.java

/*
 * Copyright 2000-2010 JetBrains s.r.o.
 *
 * 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 com.intellij.openapi.util.io;

import com.intellij.util.io.UnsyncByteArrayOutputStream;
import org.jetbrains.annotations.NotNull;

public class BufferExposingByteArrayOutputStream extends UnsyncByteArrayOutputStream {
  public BufferExposingByteArrayOutputStream() {}

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

  public BufferExposingByteArrayOutputStream(byte[] buffer) {
    super(buffer);
  }

  @NotNull
  public byte[] getInternalBuffer() {
    return myBuffer;
  }

  // moves back the written bytes pointer by {@link #size}, to "unwrite" last {@link #size} bytes
  public int backOff(int size) {
    assert size >= 0 : size;
    myCount -= size;
    assert myCount >= 0 : myCount;
    return myCount;
  }
}