/*
    * 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.flow;
  
  import java.util.Collections;
  import java.util.HashMap;
  import java.util.Map;
  import javax.el.ValueExpression;
  import javax.faces.context.FacesContext;
  import javax.faces.flow.FlowCallNode;
  import javax.faces.flow.Parameter;
  
  /**
   *
   * @since 2.2
   * @author Leonardo Uribe
   */
  public class FlowCallNodeImpl extends FlowCallNode implements Freezable
  {
      private String _id;
      private String _calledFlowId;
      private ValueExpression _calledFlowIdEL;
      private String _calledFlowDocumentId;
      private ValueExpression _calledFlowDocumentIdEL;
      
      private Map<String, Parameter> _outboundParametersMap;
      private Map<String, Parameter> _unmodifiableOutboundParametersMap;
      
      private boolean _initialized;
  
      public FlowCallNodeImpl(String id)
      {
          this._id = id;
          _outboundParametersMap = new HashMap<String, Parameter>();
          _unmodifiableOutboundParametersMap = Collections.unmodifiableMap(_outboundParametersMap);
      }
      
      @Override
      public Map<String, Parameter> getOutboundParameters()
      {
          return _unmodifiableOutboundParametersMap;
      }
      
      public void putOutboundParameter(String key, Parameter value)
      {
          checkInitialized();
          _outboundParametersMap.put(key, value);
      }
  
      @Override
      public String getCalledFlowDocumentId(FacesContext context)
      {
          if (_calledFlowDocumentIdEL != null)
          {
              return (String) _calledFlowDocumentIdEL.getValue(context.getELContext());
          }
          return _calledFlowDocumentId;
      }
  
      @Override
      public String getCalledFlowId(FacesContext context)
      {
          if (_calledFlowIdEL != null)
          {
              return (String) _calledFlowIdEL.getValue(context.getELContext());
          }
          return _calledFlowId;
      }
  
      @Override
      public String getId()
      {
          return _id;
      }
  
      public void setId(String id)
      {
          checkInitialized();
          this._id = id;
      }
  
      public void setCalledFlowId(String calledFlowId)
      {
         checkInitialized();
         this._calledFlowId = calledFlowId;
         this._calledFlowIdEL = null;
     }
 
     public void setCalledFlowDocumentId(String calledFlowDocumentId)
     {
         checkInitialized();
         this._calledFlowDocumentId = calledFlowDocumentId;
         this._calledFlowDocumentIdEL = null;
     }
     
     public void freeze()
     {
         _initialized = true;
         
         for (Map.Entry<String, Parameter> entry : _outboundParametersMap.entrySet())
         {
             if (entry.getValue() instanceof Freezable)
             {
                 ((Freezable)entry.getValue()).freeze();
             }
         }
     }
     
     private void checkInitialized() throws IllegalStateException
     {
         if (_initialized)
         {
             throw new IllegalStateException("Flow is inmutable once initialized");
         }
     }
 
     /**
      * @param calledFlowIdEL the _calledFlowIdEL to set
      */
     public void setCalledFlowId(ValueExpression calledFlowIdEL)
     {
         this._calledFlowIdEL = calledFlowIdEL;
         this._calledFlowId = null;
     }
 
     /**
      * @param calledFlowDocumentIdEL the _calledFlowDocumentIdEL to set
      */
     public void setCalledFlowDocumentId(ValueExpression calledFlowDocumentIdEL)
     {
         this._calledFlowDocumentIdEL = calledFlowDocumentIdEL;
         this._calledFlowDocumentId = null;
     }
 }