CommonLockKey.java

/*
 *
 * This is a simple Content Management System (CMS)
 * Copyright (C) 2012  Imran M Yousuf (imyousuf@smartitengineering.com)
 *
 * This program 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.
 *
 * 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 Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
package com.smartitengineering.cms.spi.util;

import com.smartitengineering.cms.spi.lock.Key;

/**
 *
 * @author imyousuf
 */
public class CommonLockKey<T> implements Key {

  private final T keySpecimen;
  private final String prefix;

  CommonLockKey(String prefix, T keySpecimen) {
    if (prefix == null || keySpecimen == null) {
      throw new IllegalArgumentException("Prefix and/or key specimen is null");
    }
    this.prefix = prefix;
    this.keySpecimen = keySpecimen;
  }

  public String getKeyStringRep() {    
    return LockUtil.getLockKeyRepresentation(prefix, keySpecimen);
  }

  @Override
  public boolean equals(Object obj) {
    if (obj == null) {
      return false;
    }
    if (!Key.class.isAssignableFrom(obj.getClass())) {
      return false;
    }
    if (!getKeyStringRep().equals(((Key) obj).getKeyStringRep())) {
      return false;
    }
    return true;
  }

  @Override
  public int hashCode() {
    int hash = 7;
    hash = 31 * hash + getKeyStringRep().hashCode();
    return hash;
  }
}