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/*
 * This file is part of Log4Jdbc.
 *
 * Log4Jdbc is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * Log4Jdbc 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 Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with Log4Jdbc.  If not, see .
 *
 */
package fr.ms.log4jdbc.utils.reference;

import java.lang.ref.Reference;
import java.lang.ref.SoftReference;

import fr.ms.log4jdbc.utils.SystemPropertyUtils;

/**
 * 
 * @see Marco4J
 * 
 * 
 * @author Marco Semiao
 * 
 */
public class NotifyReferenceObject implements ReferenceObject {

  private final static boolean printCleanReference = SystemPropertyUtils.getProperty("log4jdbc.softReference.print",
      false);

  private final String message;

  private final Reference reference;

  NotifyReferenceObject(final String message, final Reference reference) {
    this.message = message;
    this.reference = reference;
  }

  public void clear() {
    reference.clear();
  }

  public boolean enqueue() {
    return reference.enqueue();
  }

  public Object get() {
    final Object obj = reference.get();

    if (obj == null && printCleanReference) {
      System.out.println(message);
    }
    return obj;
  }

  public boolean isEnqueued() {
    return reference.isEnqueued();
  }

  static ReferenceObject newSoftReference(final String message, final Object referent) {
    final Reference soft = new SoftReference(referent);

    return new NotifyReferenceObject(message, soft);
  }
}