/*
    * 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.cdi;
  
  import org.apache.myfaces.cdi.util.CDIUtils;
  import java.util.Collection;
  import java.util.Map;
  import java.util.Set;
  import javax.enterprise.inject.spi.BeanManager;
  import org.apache.myfaces.cdi.util.BeanProvider;
  
  /**
   * 
   *
   * @author Leonardo Uribe
   */
  public class FlowScopeMap implements Map
  {
      private BeanManager _beanManager;
      private String _currentClientWindowFlowId;
      private FlowScopeBeanHolder _flowScopeBeanHolder;
      private boolean _initOptional = false;
      
      public FlowScopeMap(BeanManager beanManager, String currentFlowMapKey)
      {
          this._beanManager = beanManager;
          this._currentClientWindowFlowId = currentFlowMapKey;
      }
      
      private FlowScopeBeanHolder getFlowScopeBeanHolder(boolean create)
      {
          if (_flowScopeBeanHolder == null)
          {
              if (create)
              {
                  _flowScopeBeanHolder = CDIUtils.lookup(_beanManager,
                      FlowScopeBeanHolder.class);
              }
              else if (!_initOptional)
              {
                  _flowScopeBeanHolder = BeanProvider.getContextualReference(
                      _beanManager, FlowScopeBeanHolder.class, true);
                  _initOptional = true;
              }
          }
          return _flowScopeBeanHolder;
      }
      
      public int size()
      {
          FlowScopeBeanHolder flowScopeBeanHolder = getFlowScopeBeanHolder(false);
          if (flowScopeBeanHolder == null)
          {
              return 0;
          }
          Map<Object, Object> map = flowScopeBeanHolder.getFlowScopeMap(_beanManager,
              _currentClientWindowFlowId, false);
          if (map == null)
          {
              return 0;
          }
          return map.size();
      }
      
      public boolean isEmpty()
      {
          FlowScopeBeanHolder flowScopeBeanHolder = getFlowScopeBeanHolder(false);
          if (flowScopeBeanHolder == null)
          {
              return true;
          }
          Map<Object, Object> map = flowScopeBeanHolder.getFlowScopeMap(_beanManager,
              _currentClientWindowFlowId, false);
          if (map == null)
          {
              return true;
          }
          return map.isEmpty();
      }
  
      public boolean containsKey(Object key)
      {
          FlowScopeBeanHolder flowScopeBeanHolder = getFlowScopeBeanHolder(false);
         if (flowScopeBeanHolder == null)
         {
             return false;
         }
         Map<Object, Object> map = flowScopeBeanHolder.getFlowScopeMap(_beanManager,
             _currentClientWindowFlowId, false);
         if (map == null)
         {
             return false;
         }
         return map.containsKey(key);
     }
 
     public boolean containsValue(Object value)
     {
         FlowScopeBeanHolder flowScopeBeanHolder = getFlowScopeBeanHolder(false);
         if (flowScopeBeanHolder == null)
         {
             return false;
         }
         Map<Object, Object> map = flowScopeBeanHolder.getFlowScopeMap(_beanManager,
             _currentClientWindowFlowId, false);
         if (map == null)
         {
             return false;
         }
         return map.containsValue(value);
     }
 
     public Object get(Object key)
     {
         FlowScopeBeanHolder flowScopeBeanHolder = getFlowScopeBeanHolder(false);
         if (flowScopeBeanHolder == null)
         {
             return null;
         }
         Map<Object, Object> map = flowScopeBeanHolder.getFlowScopeMap(_beanManager,
             _currentClientWindowFlowId, false);
         if (map == null)
         {
             return null;
         }
         return map.get(key);
     }
 
     public Object put(Object key, Object value)
     {
         FlowScopeBeanHolder flowScopeBeanHolder = getFlowScopeBeanHolder(true);
         Map<Object, Object> map = flowScopeBeanHolder.getFlowScopeMap(
             _beanManager, _currentClientWindowFlowId, true);
         return map.put(key, value);
     }
 
     public Object remove(Object key)
     {
         FlowScopeBeanHolder flowScopeBeanHolder = getFlowScopeBeanHolder(false);
         if (flowScopeBeanHolder == null)
         {
             return null;
         }
         Map<Object, Object> map = flowScopeBeanHolder.getFlowScopeMap(_beanManager,
             _currentClientWindowFlowId, false);
         if (map == null)
         {
             return null;
         }
         return map.remove(key);
     }
 
     public void putAll(Map m)
     {
         FlowScopeBeanHolder flowScopeBeanHolder = getFlowScopeBeanHolder(true);
         Map<Object, Object> map = flowScopeBeanHolder.getFlowScopeMap(
             _beanManager, _currentClientWindowFlowId, true);
         map.putAll(m);
     }
 
     public void clear()
     {
         FlowScopeBeanHolder flowScopeBeanHolder = getFlowScopeBeanHolder(false);
         if (flowScopeBeanHolder == null)
         {
             return;
         }
         Map<Object, Object> map = flowScopeBeanHolder.getFlowScopeMap(_beanManager,
             _currentClientWindowFlowId, false);
         if (map == null)
         {
             return;
         }
         map.clear();
     }
 
     public Set keySet()
     {
         FlowScopeBeanHolder flowScopeBeanHolder = getFlowScopeBeanHolder(true);
         Map<Object, Object> map = flowScopeBeanHolder.getFlowScopeMap(
             _beanManager, _currentClientWindowFlowId, true);
         return map.keySet();
     }
 
     public Collection values()
     {
         FlowScopeBeanHolder flowScopeBeanHolder = getFlowScopeBeanHolder(true);
         Map<Object, Object> map = flowScopeBeanHolder.getFlowScopeMap(
             _beanManager, _currentClientWindowFlowId, true);
         return map.values();
     }
 
     public Set entrySet()
     {
         FlowScopeBeanHolder flowScopeBeanHolder = getFlowScopeBeanHolder(true);
         Map<Object, Object> map = flowScopeBeanHolder.getFlowScopeMap(
             _beanManager, _currentClientWindowFlowId, true);
         return map.entrySet();
     }
 }