/*
    * 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.view.facelets.tag.composite;
  
  import java.io.Serializable;
  import java.util.ArrayList;
  import java.util.Collections;
  import java.util.List;
  
  import javax.el.ValueExpression;
  import javax.faces.FacesException;
  import javax.faces.component.UIComponent;
  import javax.faces.component.behavior.ClientBehaviorHolder;
  import javax.faces.context.FacesContext;
  
  import org.apache.myfaces.shared.util.StringUtils;
  
  /**
   * @author Leonardo Uribe (latest modification by $Author$)
   * @version $Revision$ $Date$
   */
  public class ClientBehaviorAttachedObjectTargetImpl 
      implements ClientBehaviorAttachedObjectTarget, Serializable
  {
  
      /**
       * 
       */
      private static final long serialVersionUID = -4645087262404844925L;
  
      protected ValueExpression _name;
      
      protected ValueExpression _targets;
      
      protected ValueExpression _event;
      
      protected boolean _default;
  
      public ClientBehaviorAttachedObjectTargetImpl()
      {
      }
  
      public String getName()
      {
          if (_name != null)
          {
              return (String) _name.getValue(FacesContext.getCurrentInstance().getELContext());
          }        
          return null;
      }
  
      public List<UIComponent> getTargets(UIComponent topLevelComponent)
      {
          FacesContext facesContext = FacesContext.getCurrentInstance();
          String [] targetsArray = getTargets(facesContext);
          
          if (targetsArray.length > 0)
          {
              List<UIComponent> targetsList = new ArrayList<UIComponent>(targetsArray.length);
              for (String target : targetsArray)
              {
                  UIComponent innerComponent = topLevelComponent.findComponent(target);
                  
                  if (innerComponent != null)
                  {
                      if (innerComponent instanceof ClientBehaviorHolder ||
                          UIComponent.isCompositeComponent(innerComponent))
                      {
                          targetsList.add(
                                  new ClientBehaviorRedirectEventComponentWrapper(innerComponent, getName(), getEvent()));
                      }
                      else
                      {
                          throw new FacesException("Component with clientId " + innerComponent.getClientId(facesContext)
                                                   + "should be instance of ClientBehaviorHolder");
                      }
                  }
              }
              return targetsList;
          }
          else
          {
              // composite:actionSource/valueHolder/editableValueHolder
             // "name" description says if targets is not set, name is 
             // the component id of the target component where
             // it should be mapped to
             String name = getName();
             if (name != null)
             {
                 UIComponent innerComponent = topLevelComponent.findComponent(getName());
                 if (innerComponent != null)
                 {
                     if (innerComponent instanceof ClientBehaviorHolder ||
                         UIComponent.isCompositeComponent(innerComponent))
                     {
                         List<UIComponent> targetsList = new ArrayList<UIComponent>(1);
                         targetsList.add(
                                 new ClientBehaviorRedirectEventComponentWrapper(innerComponent, getName(), getEvent()));
                         return targetsList;
                     }
                     else
                     {
                         throw new FacesException("Component with clientId "+ innerComponent.getClientId(facesContext)
                                                  + "should be instance of ClientBehaviorHolder");
                     }
                 }
             }
             return Collections.emptyList();
         }
     }
     
     public String [] getTargets(FacesContext context)
     {
         if (_targets != null)
         {
             return StringUtils.splitShortString((String) _targets.getValue(context.getELContext()), ' ');
         }
         return org.apache.myfaces.shared.util.ArrayUtils.EMPTY_STRING_ARRAY;
     }
     
     public void setName(ValueExpression name)
     {
         _name = name;
     }
     
     public void setTargets(ValueExpression ve)
     {
         _targets = ve;
     }
     
     public String getEvent()
     {
         if (_event != null)
         {
             return (String) _event.getValue(FacesContext.getCurrentInstance().getELContext());
         }        
         return null;
     }
     
     public void setEvent(ValueExpression event)
     {
         this._event = event;
     }
 
     public boolean isDefaultEvent()
     {
         return _default;
     }
 
     public void setDefault(boolean default1)
     {
         _default = default1;
     }
 }