/*
    *  Copyright 2001-2013 Stephen Colebourne
    *
    *  Licensed 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.joda.beans.impl.map;
  
  import java.util.HashMap;
  import java.util.Iterator;
  import java.util.Map;
  
  import org.joda.beans.Bean;
  import org.joda.beans.BeanBuilder;
  import org.joda.beans.MetaProperty;
  import org.joda.beans.PropertyMap;
  import org.joda.beans.impl.BasicBeanBuilder;
  import org.joda.beans.impl.BasicMetaBean;
  
  /**
   * Implementation of a meta-bean for {@code MapBean}.
   * 
   * @author Stephen Colebourne
   */
  class MapMetaBean extends BasicMetaBean {
  
      /**
       * The bean itself.
       */
      private final MapBean bean;
  
      /**
       * Creates the meta-bean.
       * 
       * @param bean  the underlying bean, not null
       */
      MapMetaBean(MapBean bean) {
          this.bean = bean;
      }
  
      //-----------------------------------------------------------------------
      @Override
      public BeanBuilder<MapBean> builder() {
          return new BasicBeanBuilder<MapBean>(new MapBean());
      }
  
      @Override
      public PropertyMap createPropertyMap(Bean bean) {
          return MapBeanPropertyMap.of(beanType().cast(bean));
      }
  
      @Override
      public Class<MapBean> beanType() {
          return MapBean.class;
      }
  
      @Override
      public String beanName() {
          return MapBean.class.getName();
      }
  
      @Override
      public int metaPropertyCount() {
          return bean.size();
      }
  
      @Override
      public boolean metaPropertyExists(String name) {
          return bean.containsKey(name);
      }
  
      @SuppressWarnings("unchecked")
      @Override
      public <R> MetaProperty<R> metaProperty(String name) {
          return (MetaProperty<R>) bean.metaProperty(name);
      }
  
      @Override
      public Iterable<MetaProperty<?>> metaPropertyIterable() {
          return new Iterable<MetaProperty<?>>() {
              private final Iterator<String> it = bean.keySet().iterator();
              @Override
              public Iterator<MetaProperty<?>> iterator() {
                  return new Iterator<MetaProperty<?>>() {
                      @Override
                      public boolean hasNext() {
                          return it.hasNext();
                      }
                      @Override
                      public MetaProperty<?> next() {
                         return MapBeanMetaProperty.of(bean, it.next());
                     }
                     @Override
                     public void remove() {
                         throw new UnsupportedOperationException("Unmodifiable");
                     }
                     
                 };
             }
         };
     }
 
     @Override
     public Map<String, MetaProperty<?>> metaPropertyMap() {
         Map<String, MetaProperty<?>> map = new HashMap<String, MetaProperty<?>>();
         for (String name : bean.keySet()) {
             map.put(name, MapBeanMetaProperty.of(bean, name));
         }
         return map;
     }
 
 }