/*

  * Copyright 2004-2011 the Seasar Foundation and the Others.

  *

  * 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 javax.faces.internal;

 import java.io.Serializable;

 import java.util.Collection;

 import java.util.HashMap;

 import java.util.Iterator;

 import java.util.Map;

 import java.util.Set;

 import javax.faces.component.UIComponent;

 import javax.faces.context.FacesContext;

 import javax.faces.el.ValueBinding;

 import org.seasar.framework.beans.BeanDesc;

 import org.seasar.framework.beans.PropertyDesc;

 import org.seasar.framework.beans.factory.BeanDescFactory;

 import org.seasar.framework.util.AssertionUtil;

 /**

  * @author shot

  * @author manhole

  *

  * This class might be changed without notice. Please do not use it

  * excluding the JSF specification part.

  */

 public class ComponentAttributesMap implements Map, Serializable {

     private static final long serialVersionUID = 1L;

     private UIComponent component = null;

     private Map attributes = null;

     private BeanDesc beanDesc = null;

     private static final int INITIAL_CAPACITY = 64;

     public ComponentAttributesMap(UIComponent component) {

         this.component = component;

         this.attributes = new HashMap(INITIAL_CAPACITY);

         setupPropertyDesc();

     }

     public ComponentAttributesMap(UIComponent component, Map attributes) {

         this.component = component;

         this.attributes = new HashMap(attributes);

         setupPropertyDesc();

     }

     public int size() {

         return attributes.size();

     }

     public void clear() {

         attributes.clear();

     }

     public boolean isEmpty() {

         return attributes.isEmpty();

     }

     //it is a specification of JSF1.1.

     public boolean containsKey(Object key) {

         if (beanDesc.hasPropertyDesc((String) key)) {

             return false;

         } else {

             return attributes.containsKey(key);

         }

     }

     public boolean containsValue(Object value) {

         return attributes.containsValue(value);

     }

     public Collection values() {

         return attributes.values();

     }

     public void putAll(Map map) {

         for (Iterator itr = map.entrySet().iterator(); itr.hasNext();) {

             Map.Entry entry = (Map.Entry) itr.next();

             put(entry.getKey(), entry.getValue());

         }

     }

     public Set entrySet() {

         return attributes.entrySet();

     }

     public Set keySet() {

         return attributes.keySet();

     }

     public Object get(Object key) {

         String k = (String) key;

         PropertyDesc propertyDesc = null;

         if (beanDesc.hasPropertyDesc(k)) {

             propertyDesc = beanDesc.getPropertyDesc(k);

         }

         if (propertyDesc != null && propertyDesc.isReadable()) {

             Object value = getComponentProperty(propertyDesc);

             if (value != null) {

                 return value;

             }

             ValueBinding vb = component.getValueBinding((String) key);

             return (vb != null) ? vb

                     .getValue(FacesContext.getCurrentInstance()) : null;

         } else {

             return attributes.get((String) key);

         }

     }

     public Object remove(Object key) {

         String k = (String) key;

         if (beanDesc.hasPropertyDesc(k)) {

             throw new IllegalArgumentException(

                     "can't remove component property");

         }

         return attributes.remove(key);

     }

     public Object put(Object key, Object value) {

         AssertionUtil.assertNotNull("key", key);

         AssertionUtil.assertNotNull("value", value);

         assertKeyIsString(key);

         String k = (String) key;

         PropertyDesc propertyDesc = null;

         if (beanDesc.hasPropertyDesc(k)) {

             propertyDesc = beanDesc.getPropertyDesc(k);

         }

         Object returnValue = null;

         if (propertyDesc != null && propertyDesc.isWritable()) {

             if (propertyDesc.isReadable()) {

                 returnValue = getComponentProperty(propertyDesc);

             }

             setComponentProperty(propertyDesc, value);

         } else {

             returnValue = attributes.put(key, value);

         }

         return returnValue;

     }

     private void setupPropertyDesc() {

         Class clazz = component.getClass();

         beanDesc = BeanDescFactory.getBeanDesc(clazz);

     }

     private void setComponentProperty(PropertyDesc propertyDesc, Object value) {

         propertyDesc.setValue(component, value);

     }

     private Object getComponentProperty(PropertyDesc propertyDesc) {

         return propertyDesc.getValue(component);

     }

     public Map getAttributesActual() {

         return attributes;

     }

     private static void assertKeyIsString(Object key) {

         if (!(key instanceof String)) {

             throw new ClassCastException("key must be a String");

         }

     }

 }