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 org.apache.arrow.vector;
  
  import org.apache.arrow.memory.ArrowBuf;
  import org.apache.arrow.memory.BufferManager;
  import org.apache.arrow.memory.RootAllocator;
  
  /**
   * Root allocator that returns buffers pre-filled with a given value.<br>
   * Useful for testing if value vectors are properly zeroing their buffers.
   */
  public class DirtyRootAllocator extends RootAllocator {
  
    private final byte fillValue;
  
    public DirtyRootAllocator(final long limit, final byte fillValue) {
      super(limit);
      this.fillValue = fillValue;
    }
  
    @Override
    public ArrowBuf buffer(long size) {
      return buffer(size, null);
    }
  
    @Override
    public ArrowBuf buffer(long size, BufferManager manager) {
      ArrowBuf buffer = super.buffer(size, manager);
      // contaminate the buffer
      for (int i = 0; i < buffer.capacity(); i++) {
        buffer.setByte(i, fillValue);
      }
  
      return buffer;
    }
  }
  