/*

  * Copyright 2006-2007 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.opensource.org/licenses/ecl2.php

  *

  * 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.rice.kns.util;

 import org.apache.commons.lang.StringUtils;

 import org.kuali.rice.core.api.CoreApiServiceLocator;

 import org.kuali.rice.krad.keyvalues.KeyValuesFinder;

 import org.kuali.rice.krad.keyvalues.KimAttributeValuesFinder;

 import org.kuali.rice.krad.keyvalues.PersistableBusinessObjectValuesFinder;

 import org.kuali.rice.krad.util.KRADConstants;

 import java.lang.reflect.Method;

 import java.security.GeneralSecurityException;

 import java.util.ArrayList;

 import java.util.HashMap;

 import java.util.List;

 /**

  * Utility map for the action form to provide a way for calling functions through jstl.

  *

  *

  */

 @SuppressWarnings("unchecked")

 public class ActionFormUtilMap extends HashMap {

     private static final long serialVersionUID = 1L;

         private boolean cacheValueFinderResults;

     /**

      * This method parses from the key the actual method to run.

      *

      * @see java.util.Map#get(java.lang.Object)

      */

         public Object get(Object key) {

             if (cacheValueFinderResults) {

                 if (super.containsKey(key)) {

                     // doing a 2 step retrieval allows us to also cache the null key correctly

                     Object cachedObject = super.get(key);

                         return cachedObject;

                 }

             }

         String[] methodKey = StringUtils.split((String) key, KRADConstants.ACTION_FORM_UTIL_MAP_METHOD_PARM_DELIMITER);

         String methodToCall = methodKey[0];

         // handle method calls with more than one parameter

         Object[] methodParms = new Object[methodKey.length - 1];

         Class[] methodParmsPrototype = new Class[methodKey.length - 1];

         for (int i=1;i<methodKey.length;i++) {

             methodParms[i-1] = methodKey[i];

             methodParmsPrototype[i-1] = Object.class;

         }

         Method method = null;

         try {

             method = ActionFormUtilMap.class.getMethod(methodToCall, methodParmsPrototype);

         }

         catch (SecurityException e) {

             throw new RuntimeException("Unable to object handle on method given to ActionFormUtilMap: " + e.getMessage());

         }

         catch (NoSuchMethodException e1) {

             throw new RuntimeException("Unable to object handle on method given to ActionFormUtilMap: " + e1.getMessage());

         }

         Object methodValue = null;

         try {

             methodValue = method.invoke(this, methodParms);

         }

         catch (Exception e) {

             throw new RuntimeException("Unable to invoke method " + methodToCall,e);

         }

         if (cacheValueFinderResults) {

             super.put(key, methodValue);

         }

         return methodValue;

     }

     /*

      * Will take in a class name parameter and attempt to create a KeyValueFinder instance, then call the finder to return a list of

      * KeyValue pairs. This is used by the htmlControlAttribute.tag to render select options from a given finder class specified in

      * the data dictionary.

      */

         public Object getOptionsMap(Object key) {

         List optionsList = new ArrayList();

         if (StringUtils.isBlank((String) key)) {

             return optionsList;

         }

         /*

          * the class name has . replaced with | in the jsp to prevent struts from treating each part of the class name as a property

          * substitute back here to get the correct name

          */

         key = StringUtils.replace((String) key, "|", ".");

         KeyValuesFinder finder;

         try {

             Class finderClass = Class.forName((String) key);

             finder = (KeyValuesFinder) finderClass.newInstance();

             optionsList = finder.getKeyValues();

         }

         catch (ClassNotFoundException e) {

             throw new RuntimeException(e.getMessage());

         }

         catch (InstantiationException e) {

             throw new RuntimeException(e.getMessage());

         }

         catch (IllegalAccessException e) {

             throw new RuntimeException(e.getMessage());

         }

         return optionsList;

     }

     // Method added to keep backward compatibility for non-kimTypeId cases

     public Object getOptionsMap(Object key, Object boClass, Object keyAttribute, Object labelAttribute, Object includeKeyInLabel) {

             return getOptionsMap(key, boClass, keyAttribute, labelAttribute, null, includeKeyInLabel );

     }

     public Object getOptionsMap(Object key, Object boClass, Object keyAttribute, Object labelAttribute, Object includeBlankRow, Object includeKeyInLabel) {

             return getOptionsMap(key, boClass, keyAttribute, labelAttribute, includeBlankRow, includeKeyInLabel, null);

     }

     /*

      *

     */

     /**

      * This method will take in a key parameter (values finder class name - in this case the generic

      * PersistableObjectValuesFinder) along with the related parameters required by this ValuesFinder,

      * and attempt to create a KeyValueFinder instance, then call the finder to return a list of

      * KeyValue pairs. This is used by the htmlControlAttribute.tag to render select options from

      * a given finder class specified in the data dictionary.

      *

      * @param key values finder class name

      * @param boClass BO class name

      * @param keyAttribute name of BO attribute for key

      * @param labelAttribute name of BO attribute for label

      * @param includeKeyInLabel whether to include the key in the label or not

      * @param kimTypeId the KIM Type to use in case of KimAttributeValuesFinder 

      * @return list of KeyValue pairs

      */

         public Object getOptionsMap(Object key, Object boClass, Object keyAttribute, Object labelAttribute, Object includeBlankRow, Object includeKeyInLabel, Object kimTypeId) {

         List optionsList = new ArrayList();

         if (StringUtils.isBlank((String) key)) {

             return optionsList;

         }

         /*

          * the class name has . replaced with | in the jsp to prevent struts from treating each part of the class name as a property

          * substitute back here to get the correct name

          */

         key = StringUtils.replace((String) key, "|", ".");

         KeyValuesFinder finder;

         try {

                     Class finderClass = Class.forName((String) key);

             finder = (KeyValuesFinder) finderClass.newInstance();

             if (finder instanceof PersistableBusinessObjectValuesFinder) {

                 String businessObjectClassName = StringUtils.replace((String) boClass, "|", ".");

                 Class businessObjectClass = Class.forName((String) businessObjectClassName);

                 ((PersistableBusinessObjectValuesFinder) finder).setBusinessObjectClass(businessObjectClass);

                 ((PersistableBusinessObjectValuesFinder) finder).setKeyAttributeName((String)keyAttribute);

                 ((PersistableBusinessObjectValuesFinder) finder).setLabelAttributeName((String)labelAttribute);

                 ((PersistableBusinessObjectValuesFinder) finder).setIncludeBlankRow(Boolean.parseBoolean((String)includeBlankRow));

                 ((PersistableBusinessObjectValuesFinder) finder).setIncludeKeyInDescription(Boolean.parseBoolean((String)includeKeyInLabel));

             } else if (finder instanceof KimAttributeValuesFinder) {

                     if (kimTypeId == null) {

                             throw new RuntimeException("kimTypeId must be specified for KimAttributeValuesFinder");

                     }

                 ((KimAttributeValuesFinder) finder).setKimTypeId(kimTypeId.toString());

                 ((KimAttributeValuesFinder) finder).setKimAttributeName(keyAttribute.toString());

             }

             optionsList = finder.getKeyValues();

         }

         catch (ClassNotFoundException e) {

             throw new RuntimeException(e.getMessage(),e);

         }

         catch (InstantiationException e) {

             throw new RuntimeException(e.getMessage(),e);

         }

         catch (IllegalAccessException e) {

             throw new RuntimeException(e.getMessage(),e);

         }

         return optionsList;

     }

     /**

      * Encrypts a value passed from the ui.

      * @param value - clear text

      * @return String - encrypted text

      */

     public String encryptValue(Object value) {

         String encrypted = "";

         if (value != null) {

             encrypted = value.toString();

         }

         try {

             encrypted = CoreApiServiceLocator.getEncryptionService().encrypt(value);

         }

         catch (GeneralSecurityException e) {

             throw new RuntimeException("Unable to encrypt value in action form: " + e.getMessage());

         }

         return encrypted;

     }

     public void setCacheValueFinderResults(boolean cacheValueFinderResults) {

         this.cacheValueFinderResults = cacheValueFinderResults;

     }

 }