/**
    * Logback: the reliable, generic, fast and flexible logging framework.
    * Copyright (C) 1999-2011, 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;
  
  import java.util.HashMap;
  import java.util.Map;
  
  /**
   * A registry which maps a property in a host class to a default class.
   * 
   * @author Cek Gülcü
   * 
   */
  public class DefaultNestedComponentRegistry {
  
    Map<HostClassAndPropertyDouble, Class> defaultComponentMap = new HashMap<HostClassAndPropertyDouble, Class>();
  
    public void add(Class hostClass, String propertyName, Class componentClass) {
      HostClassAndPropertyDouble hpDouble = new HostClassAndPropertyDouble(
          hostClass, propertyName.toLowerCase());
      defaultComponentMap.put(hpDouble, componentClass);
    }
  
    public Class findDefaultComponentType(Class hostClass, String propertyName) {
      propertyName = propertyName.toLowerCase();
      while (hostClass != null) {
        Class componentClass = oneShotFind(hostClass, propertyName);
        if (componentClass != null) {
          return componentClass;
        }
        hostClass = hostClass.getSuperclass();
      }
      return null;
    }
  
    private Class oneShotFind(Class hostClass, String propertyName) {
      HostClassAndPropertyDouble hpDouble = new HostClassAndPropertyDouble(
          hostClass, propertyName);
      return defaultComponentMap.get(hpDouble);
    }
  
  }