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anwiba commons lang project

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/*
 * #%L
 * anwiba commons core
 * %%
 * Copyright (C) 2007 - 2016 Andreas Bartels
 * %%
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License as
 * published by the Free Software Foundation, either version 2.1 of the
 * License, or (at your option) any later version.
 * 
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Lesser Public License for more details.
 * 
 * You should have received a copy of the GNU General Lesser Public
 * License along with this program.  If not, see
 * .
 * #L%
 */
package net.anwiba.commons.lang.object;


public final class SingleUseObjectReceiver implements IObjectReceiver {
  private final IObjectReceiver receiver;
  boolean flag = false;

  public SingleUseObjectReceiver(final IObjectReceiver receiver) {
    this.receiver = receiver;
  }

  @Override
  public void set(final T object) {
    synchronized (this.receiver) {
      if (this.flag) {
        throw new IllegalArgumentException("could be used only once"); //$NON-NLS-1$
      }
      this.flag = true;
      this.receiver.set(object);
    }
  }
}