/**
 * Logback: the reliable, generic, fast and flexible logging framework.
 * Copyright (C) 1999-2013, QOS.ch. All rights reserved.
 *
 * This program and the accompanying materials are dual-licensed under
 * either the terms of the Eclipse Public License v1.0 as published by
 * the Eclipse Foundation
 *
 *   or (per the licensee's choosing)
 *
 * under the terms of the GNU Lesser General Public License version 2.1
 * as published by the Free Software Foundation.
 */
package ch.qos.logback.core.joran.spi;

/**
 * A 2-tuple (a double) consisting of a Class and a String. The Class references
 * the hosting class of a component and the String represents the property name
 * under which a nested component is referenced the host.
 * 
 * This class is used by {@link DefaultNestedComponentRegistry}.
 * 
 * @author Ceki Gulcu
 * 
 */
public class HostClassAndPropertyDouble {

  final Class<?> hostClass;
  final String propertyName;

  public HostClassAndPropertyDouble(Class<?> hostClass, String propertyName) {
    this.hostClass = hostClass;
    this.propertyName = propertyName;
  }

  public Class<?> getHostClass() {
    return hostClass;
  }

  public String getPropertyName() {
    return propertyName;
  }

  @Override
  public int hashCode() {
    final int prime = 31;
    int result = 1;
    result = prime * result + ((hostClass == null) ? 0 : hostClass.hashCode());
    result = prime * result
        + ((propertyName == null) ? 0 : propertyName.hashCode());
    return result;
  }

  @Override
  public boolean equals(Object obj) {
    if (this == obj)
      return true;
    if (obj == null)
      return false;
    if (getClass() != obj.getClass())
      return false;
    final HostClassAndPropertyDouble other = (HostClassAndPropertyDouble) obj;
    if (hostClass == null) {
      if (other.hostClass != null)
        return false;
    } else if (!hostClass.equals(other.hostClass))
      return false;
    if (propertyName == null) {
      if (other.propertyName != null)
        return false;
    } else if (!propertyName.equals(other.propertyName))
      return false;
    return true;
  }

}
