/*
    *  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.flexi;
  
  import java.util.Collections;
  import java.util.HashMap;
  import java.util.Iterator;
  import java.util.Map;
  import java.util.NoSuchElementException;
  
  import org.joda.beans.Bean;
  import org.joda.beans.BeanBuilder;
  import org.joda.beans.MetaBean;
  import org.joda.beans.MetaProperty;
  import org.joda.beans.PropertyMap;
  import org.joda.beans.impl.BasicBeanBuilder;
  
  /**
   * Implementation of a meta-bean for {@code FlexiBean}.
   * 
   * @author Stephen Colebourne
   */
  class FlexiMetaBean implements MetaBean {
  
      /**
       * The bean itself.
       */
      private final FlexiBean bean;
  
      /**
       * Creates the meta-bean.
       * 
       * @param flexiBean  the underlying bean, not null
       */
      FlexiMetaBean(FlexiBean flexiBean) {
          bean = flexiBean;
      }
  
      @Override
      public BeanBuilder<FlexiBean> builder() {
          return new BasicBeanBuilder<FlexiBean>(new FlexiBean());
      }
  
      @Override
      public PropertyMap createPropertyMap(Bean bean) {
          return FlexiPropertyMap.of(beanType().cast(bean));
      }
  
      @Override
      public Class<FlexiBean> beanType() {
          return FlexiBean.class;
      }
  
      @Override
      public String beanName() {
          return FlexiBean.class.getName();
      }
  
      @Override
      public int metaPropertyCount() {
          return bean.size();
      }
  
      @Override
      public boolean metaPropertyExists(String name) {
          return bean.propertyExists(name);
      }
  
      @Override
      public MetaProperty<Object> metaProperty(String name) {
          Object obj = bean.get(name);
          if (obj == null) {
              throw new NoSuchElementException("Unknown property: " + name);
          }
          return FlexiMetaProperty.of(bean.metaBean, name);
      }
  
      @Override
      public Iterable<MetaProperty<?>> metaPropertyIterable() {
          if (bean.data.isEmpty()) {
              return Collections.emptySet();
          }
          return new Iterable<MetaProperty<?>>() {
              private final Iterator<String> it = FlexiMetaBean.this.bean.data.keySet().iterator();
              @Override
              public Iterator<MetaProperty<?>> iterator() {
                 return new Iterator<MetaProperty<?>>() {
                     @Override
                     public boolean hasNext() {
                         return it.hasNext();
                     }
                     @Override
                     public MetaProperty<?> next() {
                         return FlexiMetaProperty.of(FlexiMetaBean.this.bean.metaBean, it.next());
                     }
                     @Override
                     public void remove() {
                         throw new UnsupportedOperationException("Unmodifiable");
                     }
                     
                 };
             }
         };
     }
 
     @Override
     public Map<String, MetaProperty<?>> metaPropertyMap() {
         if (bean.data.isEmpty()) {
             return Collections.emptyMap();
         }
         Map<String, MetaProperty<?>> map = new HashMap<String, MetaProperty<?>>();
         for (String name : bean.data.keySet()) {
             map.put(name, FlexiMetaProperty.of(bean.metaBean, name));
         }
         return Collections.unmodifiableMap(map);
     }
 
 }