/**

  * Copyright 2010 The Kuali Foundation Licensed under the

  * Educational Community 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.osedu.org/licenses/ECL-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.kuali.student.common.validator;

 import java.beans.BeanInfo;

 import java.beans.IntrospectionException;

 import java.beans.Introspector;

 import java.beans.PropertyDescriptor;

 import java.util.HashMap;

 import java.util.Map;

 import org.apache.log4j.Logger;

 public class BeanConstraintDataProvider implements ConstraintDataProvider {

     final static Logger LOG = Logger.getLogger(BeanConstraintDataProvider.class);

     private static final String DYNAMIC_ATTRIBUTE = "attributes";

         Map<String, Object> dataMap = null;

         /*

          * The only place where the dataprovider should get initialized is

          * BeanConstraintSetupFactory

          */

         public BeanConstraintDataProvider() {

         }

         //TODO fix it later. 

     public String getPath(){

         return "";

     }

     @SuppressWarnings("unchecked")

     @Override

         public void initialize(Object o) {

                 dataMap = new HashMap<String, Object>();

                 try {

                         BeanInfo beanInfo = Introspector.getBeanInfo(o.getClass());

                         for (PropertyDescriptor pd : beanInfo.getPropertyDescriptors()) {

                                 Object value = null;

                                 try {

                                         value = pd.getReadMethod().invoke(o);

                                 } catch (Exception e) {

                                         LOG.warn("Method invokation failed",e);

                                 }

                     // Extract dynamic attributes

                     if(DYNAMIC_ATTRIBUTE.equals(pd.getName())) {

                         dataMap.putAll((Map<String, String>)value);

                     } else {

                                         dataMap.put(pd.getName(), value);

                     }

                         }

                 } catch (IntrospectionException e) {

                         throw new RuntimeException(e);

                 }

         }

         @Override

         public String getObjectId() {

                 return (dataMap.containsKey("id") && null != dataMap.get("id")) ? dataMap.get("id").toString() : null;

         }

         @Override

         public Object getValue(String fieldKey) {

                 return dataMap.get(fieldKey);

         }

         @Override

         public Boolean hasField(String fieldKey) {

                 return dataMap.containsKey(fieldKey);

         }

 }