TopicListKey.java

/*
 * Copyright (C) 2003-2013 eXo Platform SAS.
 *
 * This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU Affero 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 org.exoplatform.forum.service.cache.model.key;

import org.exoplatform.forum.common.cache.model.ScopeCacheKey;
import org.exoplatform.forum.service.impl.model.TopicFilter;

public class TopicListKey extends ScopeCacheKey {
  private static final long serialVersionUID = 1L;
  private TopicFilter filter;
  private int offset;
  private int limit;

  public TopicListKey(TopicFilter filter, int offset, int limit) {
    this.filter = filter;
    this.offset = offset;
    this.limit = limit;
  }
  /**
   * Gets ForumId from Filter
   * @return
   */
  public String getForumId() {
    return this.filter.forumId();
  }

  @Override
  public boolean equals(Object o) {
    if (this == o)
      return true;
    if (!(o instanceof TopicListKey))
      return false;
    if (!super.equals(o))
      return false;

    TopicListKey that = (TopicListKey) o;

    if (limit != that.limit) return false;
    if (offset != that.offset) return false;

    if (filter == null || filter.equals(that.filter) == false) {
      return false;
    }

    return true;
  }

  private int getHashCode(int current, Object key) {
    return 31 * current + (key != null ? key.hashCode() : 0);
  }

  @Override
  public int hashCode() {
    int result = super.hashCode();
    result = getHashCode(result, filter.categoryId());
    result = getHashCode(result, filter.forumId());
    result = getHashCode(result, filter.isApproved());
    result = getHashCode(result, filter.isAdmin());
    result = getHashCode(result, filter.orderBy());
    result = 31 * result + offset;
    result = 31 * result + limit;
    return result;
  }
}