/*

  * Copyright 2005-2007 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.kew.actions;

 import java.util.ArrayList;

 import java.util.Collections;

 import java.util.HashMap;

 import java.util.Iterator;

 import java.util.List;

 import java.util.Map;

 import org.apache.commons.lang.StringUtils;

 import org.apache.log4j.Logger;

 import org.kuali.rice.core.api.reflect.DataDefinition;

 import org.kuali.rice.core.api.reflect.ObjectDefinition;

 import org.kuali.rice.core.api.reflect.DataDefinition;

 import org.kuali.rice.core.api.reflect.ObjectDefinition;

 import org.kuali.rice.core.framework.resourceloader.ObjectDefinitionResolver;

 import org.kuali.rice.core.util.ClassLoaderUtils;

 import org.kuali.rice.kew.actionrequest.ActionRequestValue;

 import org.kuali.rice.kew.exception.ResourceUnavailableException;

 import org.kuali.rice.kew.exception.WorkflowRuntimeException;

 import org.kuali.rice.kew.routeheader.DocumentRouteHeaderValue;

 import org.kuali.rice.kew.util.KEWConstants;

 import org.kuali.rice.kim.api.entity.principal.PrincipalContract;

 /**

  * A simple implementation of an ActionRegistry which includes all of the default Workflow Actions.

  *

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

  */

 public class ActionRegistryImpl implements ActionRegistry {

     private static final Logger LOG = Logger.getLogger(ActionRegistryImpl.class);

         private static Map<String, String> actionMap = new HashMap<String, String>();

         static {

                 actionMap.put(KEWConstants.ACTION_TAKEN_ACKNOWLEDGED_CD, AcknowledgeAction.class.getName());

                 actionMap.put(KEWConstants.ACTION_TAKEN_ADHOC_CD, AdHocAction.class.getName());

                 actionMap.put(KEWConstants.ACTION_TAKEN_ADHOC_REVOKED_CD, RevokeAdHocAction.class.getName());

                 actionMap.put(KEWConstants.ACTION_TAKEN_APPROVED_CD, ApproveAction.class.getName());

                 actionMap.put(KEWConstants.ACTION_TAKEN_BLANKET_APPROVE_CD, BlanketApproveAction.class.getName());

                 actionMap.put(KEWConstants.ACTION_TAKEN_CANCELED_CD, CancelAction.class.getName());

                 actionMap.put(KEWConstants.ACTION_TAKEN_COMPLETED_CD, CompleteAction.class.getName());

         actionMap.put(KEWConstants.ACTION_TAKEN_ROUTED_CD, RouteDocumentAction.class.getName());

                 actionMap.put(KEWConstants.ACTION_TAKEN_DENIED_CD, DisapproveAction.class.getName());

                 actionMap.put(KEWConstants.ACTION_TAKEN_FYI_CD, ClearFYIAction.class.getName());

                 actionMap.put(KEWConstants.ACTION_TAKEN_LOG_DOCUMENT_ACTION_CD, LogDocumentActionAction.class.getName());

                 actionMap.put(KEWConstants.ACTION_TAKEN_MOVE_CD, MoveDocumentAction.class.getName());

                 actionMap.put(KEWConstants.ACTION_TAKEN_TAKE_WORKGROUP_AUTHORITY_CD, TakeWorkgroupAuthority.class.getName());

                 actionMap.put(KEWConstants.ACTION_TAKEN_RELEASE_WORKGROUP_AUTHORITY_CD, ReleaseWorkgroupAuthority.class.getName());

                 actionMap.put(KEWConstants.ACTION_TAKEN_RETURNED_TO_PREVIOUS_CD, ReturnToPreviousNodeAction.class.getName());

                 actionMap.put(KEWConstants.ACTION_TAKEN_SAVED_CD, SaveActionEvent.class.getName());

                 //actionMap.put(KEWConstants.ACTION_TAKEN_SU_ACTION_REQUEST_ACKNOWLEDGED_CD, SuperUserActionRequestAcknowledgeEvent.class.getName());

                 actionMap.put(KEWConstants.ACTION_TAKEN_SU_ACTION_REQUEST_APPROVED_CD, SuperUserActionRequestApproveEvent.class.getName());

                 //actionMap.put(KEWConstants.ACTION_TAKEN_SU_ACTION_REQUEST_COMPLETED_CD, SuperUserActionRequestCompleteEvent.class.getName());

                 //actionMap.put(KEWConstants.ACTION_TAKEN_SU_ACTION_REQUEST_FYI_CD, SuperUserActionRequestFYIEvent.class.getName());

                 actionMap.put(KEWConstants.ACTION_TAKEN_SU_APPROVED_CD, SuperUserApproveEvent.class.getName());

                 actionMap.put(KEWConstants.ACTION_TAKEN_SU_CANCELED_CD, SuperUserCancelEvent.class.getName());

                 actionMap.put(KEWConstants.ACTION_TAKEN_SU_DISAPPROVED_CD, SuperUserDisapproveEvent.class.getName());

                 actionMap.put(KEWConstants.ACTION_TAKEN_SU_RETURNED_TO_PREVIOUS_CD, SuperUserReturnToPreviousNodeAction.class.getName());

                 actionMap.put(KEWConstants.ACTION_TAKEN_SU_ROUTE_LEVEL_APPROVED_CD, SuperUserNodeApproveEvent.class.getName());

         }

         public void registerAction(String actionCode, String actionClass) {

                 if (actionClass == null) {

                         throw new IllegalArgumentException("Action Code '" + actionCode + "' cannot be registered with a null action class.");

                 }

                 if (actionMap.containsKey(actionCode)) {

                         throw new WorkflowRuntimeException("Action Code is already in use.  [" +

                                         actionCode + ", " + actionClass + "].  "+

                                         "Please unregister the existing implementation first.");

                 }

                 actionMap.put(actionCode, actionClass);

         }

         public void unregisterAction(String actionCode) {

                 actionMap.remove(actionCode);

         }

         public Map getActionMap() {

                 return Collections.unmodifiableMap(actionMap);

         }

         /* (non-Javadoc)

          * @see org.kuali.rice.kew.actions.ActionRegistry#createAction(java.lang.String, java.util.List)

          */

         public ActionTakenEvent createAction(String actionCode, List<DataDefinition> parameters) throws ResourceUnavailableException {

                 String actionClassName = actionMap.get(actionCode);

                 if (actionClassName == null) {

                         throw new IllegalArgumentException("No action has been registered for the given action code of '" + actionCode + "'.");

                 }

                 ObjectDefinition actionDefinition = new ObjectDefinition(actionClassName);

                 if (parameters != null && !parameters.isEmpty()) {

                         actionDefinition.setConstructorParameters(parameters);

                 }

                 try {

                         //ActionTakenEvent actionTaken = (ActionTakenEvent)GlobalResourceLoader.getResourceLoader().getObject(actionDefinition);

                         // TODO ActionTakenEvent is not an interface so we can't fetch them through the GlobalResourceLoader, for now, just use

                         // the ObjectDefinitionResolver

                         ActionTakenEvent actionTaken = (ActionTakenEvent) ObjectDefinitionResolver.createObject(actionDefinition, ClassLoaderUtils.getDefaultClassLoader(), false);

                         if (actionTaken == null) {

                                 // TODO the exception handling here is a bit wonky

                                 throw new ResourceUnavailableException("Could not locate action taken class '" + actionClassName + "'");

                         }

                         return actionTaken;

                 } catch (Exception e) {

             LOG.debug("createAction() Exception thrown while working with action class name '" + actionClassName + "'");

                         if (e instanceof ResourceUnavailableException) {

                                 throw (ResourceUnavailableException)e;

                         }

                         throw new ResourceUnavailableException(e);

                 }

         }

     /* (non-Javadoc)

      * @see org.kuali.rice.kew.actions.ActionValidationService#getValidActions(org.kuali.rice.kew.user.WorkflowUser, org.kuali.rice.kew.routeheader.DocumentRouteHeaderValue)

      */

     public ValidActions getValidActions(PrincipalContract principal, DocumentRouteHeaderValue document) throws ResourceUnavailableException {

         ValidActions validActions = new ValidActions();

         ArrayList<ActionRequestValue> activeRequests = new ArrayList<ActionRequestValue>();

         for ( ActionRequestValue ar : document.getActionRequests() ) {

                 if ( (ar.getCurrentIndicator() != null && ar.getCurrentIndicator()) && StringUtils.equals( ar.getStatus(), KEWConstants.ACTION_REQUEST_ACTIVATED ) ) {

                         activeRequests.add(ar);

                 }

         }

         for (String actionTakenCode : actionMap.keySet())

         {

             List<DataDefinition> parameters = new ArrayList<DataDefinition>();

             parameters.add(new DataDefinition(document));

             parameters.add(new DataDefinition(principal));

             ActionTakenEvent actionEvent = createAction(actionTakenCode, parameters);

             if (StringUtils.isEmpty(actionEvent.validateActionRules(activeRequests)))

             {

                 validActions.addActionTakenCode(actionTakenCode);

             }

         }

         return validActions;

     }

 }