/**

  * Copyright 2005-2011 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.kew.rule.bo;

 import org.kuali.rice.core.api.exception.RiceRuntimeException;

 import org.kuali.rice.core.api.util.ConcreteKeyValue;

 import org.kuali.rice.core.api.util.KeyValue;

 import org.kuali.rice.kew.api.rule.RoleName;

 import org.kuali.rice.kew.rule.RuleBaseValues;

 import org.kuali.rice.kew.rule.RuleDelegationBo;

 import org.kuali.rice.kns.document.MaintenanceDocument;

 import org.kuali.rice.kns.util.KNSGlobalVariables;

 import org.kuali.rice.kns.web.struts.form.KualiMaintenanceForm;

 import org.kuali.rice.krad.bo.PersistableBusinessObject;

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

 import java.util.ArrayList;

 import java.util.List;

 /**

  * A values finder for generating a list of Role names that can be selected for a given RuleTemplate.

  * 

  * This is dependant on the template selected on the maintenance document so it needs to use

  * GlobalVariables to get a reference to the KualiForm so it can examine the business object

  * and extract the role names from the RuleTemplate.

  * 

  * @author Kuali Rice Team (rice.collab@kuali.org)

  */

 public class RoleNameValuesFinder extends KeyValuesBase {

         @Override

         public List<KeyValue> getKeyValues() {

                 List<KeyValue> roleNames = new ArrayList<KeyValue>();

                 if (KNSGlobalVariables.getKualiForm() != null && KNSGlobalVariables.getKualiForm() instanceof KualiMaintenanceForm) {

                         KualiMaintenanceForm form = (KualiMaintenanceForm)KNSGlobalVariables.getKualiForm();

                         MaintenanceDocument document = (MaintenanceDocument)form.getDocument();

                         PersistableBusinessObject businessObject = document.getNewMaintainableObject().getBusinessObject();

                         RuleBaseValues rule = null;

                         if (businessObject instanceof RuleBaseValues) {

                                 rule = (RuleBaseValues)businessObject;

                         } else if (businessObject instanceof RuleDelegationBo) {

                                 rule = ((RuleDelegationBo)businessObject).getDelegationRule();

                         } else {

                                 throw new RiceRuntimeException("Cannot locate RuleBaseValues business object on maintenance document.  Business Object was " + businessObject);

                         }

                         RuleTemplateBo ruleTemplate = rule.getRuleTemplate();

                         List<RoleName> roles = ruleTemplate.getRoles();

                         for (RoleName role : roles) {

                                 roleNames.add(new ConcreteKeyValue(role.getName(), role.getLabel()));

                         }

                 }

                 return roleNames;

         }

 }