/**
 * 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.gora.persistency.impl;

import org.apache.gora.persistency.Dirtyable;

final class DirtyFlag implements Dirtyable {

  private boolean dirty;

  public DirtyFlag(boolean dirty) {
    this.dirty = dirty;
  }

  public DirtyFlag() {
    this.dirty = false;
  }

  @Override
  public boolean isDirty() {
    return dirty;
  }

  @Override
  public void clearDirty() {
    this.dirty = false;
  }

  /**
   * Set this DirtyFlag to dirty if the <tt>dirty</tt> operand is true. If
   * not, the state of the flag remains unchanged.
   * 
   * @param dirty
   *            Weather or not to set this flag to dirty. If false, the state
   *            is unchanged.
   */
  public void makeDirty(boolean dirty) {
    this.dirty = this.dirty || dirty;
  }

}
