/*
    * 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.myfaces.tobago.util;
  
  import org.apache.commons.beanutils.PropertyUtils;
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  import java.util.Comparator;
  import java.io.Serializable;
  
  public class BeanComparator extends ComparatorBase implements Serializable {
  
    private static final long serialVersionUID = -7450094725566090886L;
  
    private static final Logger LOG = LoggerFactory.getLogger(BeanComparator.class);
  
    private String property;
  
    public BeanComparator(String property) {
      this.property = property;
    }
  
    public BeanComparator(String property, boolean reverse) {
      super(reverse);
      this.property = property;
    }
  
    public BeanComparator(String property, Comparator comparator) {
      super(comparator);
      this.property = property;
    }
  
    public BeanComparator(String property, Comparator comparator, boolean reverse) {
      super(reverse, comparator);
      this.property = property;
    }
  
    /**
     * @param param1 <description>
     * @return <description>
     */
    public boolean equals(Object param1) {
      if (this == param1) {
        return true;
      }
      if (param1 instanceof BeanComparator) {
        return ((BeanComparator) param1).getProperty().equals(property)
            && super.equals(param1);
      }
      return false;
    }
  
    public int hashCode() {
      int result;
      result = (property != null ? property.hashCode() : 0);
      result = 29 * result + super.hashCode();
      return result;
    }
  
    // implementation of java.util.Comparator interface
  
    /**
     * @param param1 <description>
     * @param param2 <description>
     * @return <description>
     */
    public int compare(Object param1, Object param2) {
      Object obj1;
      Object obj2;
      try {
        obj1 = PropertyUtils.getProperty(param1, property);
        obj2 = PropertyUtils.getProperty(param2, property);
  
      } catch (Exception e) {
        LOG.error(e.getMessage(), e);
        return 0;
      }
  
      return internalCompare(obj1, obj2);
    }
  
   public String getProperty() {
     return this.property;
   }
 }