/*

  * Copyright 2007 The Kuali Foundation

  *

  * Licensed under the Educational Community License, Version 1.0 (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/ecl1.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.krad.maintenance;

 import org.apache.commons.lang.StringUtils;

 import org.apache.ojb.broker.metadata.ClassNotPersistenceCapableException;

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

 import org.kuali.rice.core.api.encryption.EncryptionService;

 import org.kuali.rice.kim.bo.Person;

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

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

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

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

 import org.kuali.rice.krad.document.MaintenanceLock;

 import org.kuali.rice.krad.exception.PessimisticLockingException;

 import org.kuali.rice.krad.service.BusinessObjectService;

 import org.kuali.rice.krad.service.DataObjectAuthorizationService;

 import org.kuali.rice.krad.service.DataObjectMetaDataService;

 import org.kuali.rice.krad.service.DocumentDictionaryService;

 import org.kuali.rice.krad.service.KRADServiceLocator;

 import org.kuali.rice.krad.service.KRADServiceLocatorWeb;

 import org.kuali.rice.krad.service.LookupService;

 import org.kuali.rice.krad.service.MaintenanceDocumentService;

 import org.kuali.rice.krad.uif.container.CollectionGroup;

 import org.kuali.rice.krad.uif.container.View;

 import org.kuali.rice.krad.uif.service.impl.ViewHelperServiceImpl;

 import org.kuali.rice.krad.uif.util.ObjectPropertyUtils;

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

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

 import org.kuali.rice.krad.web.form.MaintenanceForm;

 import java.security.GeneralSecurityException;

 import java.util.ArrayList;

 import java.util.Collection;

 import java.util.Iterator;

 import java.util.List;

 import java.util.Map;

 /**

  * Default implementation of the <code>Maintainable</code> interface

  *

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

  */

 public class MaintainableImpl extends ViewHelperServiceImpl implements Maintainable {

     private static final long serialVersionUID = 9125271369161634992L;

     private static final org.apache.log4j.Logger LOG = org.apache.log4j.Logger.getLogger(MaintainableImpl.class);

     private String documentNumber;

     private Object dataObject;

     private Class<?> dataObjectClass;

     private String maintenanceAction;

     private transient LookupService lookupService;

     private transient DataObjectAuthorizationService dataObjectAuthorizationService;

     private transient DataObjectMetaDataService dataObjectMetaDataService;

     private transient DocumentDictionaryService documentDictionaryService;

     private transient EncryptionService encryptionService;

     private transient BusinessObjectService businessObjectService;

     private transient MaintenanceDocumentService maintenanceDocumentService;

     /**

      * @see Maintainable#retrieveObjectForEditOrCopy(java.util.Map)

      */

     @Override

     public Object retrieveObjectForEditOrCopy(MaintenanceDocument document, Map<String, String> dataObjectKeys) {

         Object dataObject = null;

         try {

             dataObject = getLookupService().findObjectBySearch(getDataObjectClass(), dataObjectKeys);

         } catch (ClassNotPersistenceCapableException ex) {

             if (!document.getOldMaintainableObject().isExternalBusinessObject()) {

                 throw new RuntimeException("Data Object Class: " + getDataObjectClass() +

                         " is not persistable and is not externalizable - configuration error");

             }

             // otherwise, let fall through

         }

         return dataObject;

     }

     /**

      * @see org.kuali.rice.krad.maintenance.Maintainable#setDocumentNumber

      */

     @Override

     public void setDocumentNumber(String documentNumber) {

         this.documentNumber = documentNumber;

     }

     /**

      * @see org.kuali.rice.krad.maintenance.Maintainable#getDocumentTitle

      */

     @Override

     public String getDocumentTitle(MaintenanceDocument document) {

         // default implementation is to allow MaintenanceDocumentBase to

         // generate the doc title

         return "";

     }

     /**

      * @see org.kuali.rice.krad.maintenance.Maintainable#getDataObject

      */

     @Override

     public Object getDataObject() {

         return dataObject;

     }

     /**

      * @see org.kuali.rice.krad.maintenance.Maintainable#setDataObject

      */

     @Override

     public void setDataObject(Object object) {

         this.dataObject = object;

     }

     /**

      * @see org.kuali.rice.krad.maintenance.Maintainable#getDataObjectClass

      */

     @Override

     public Class getDataObjectClass() {

         return dataObjectClass;

     }

     /**

      * @see org.kuali.rice.krad.maintenance.Maintainable#setDataObjectClass

      */

     @Override

     public void setDataObjectClass(Class dataObjectClass) {

         this.dataObjectClass = dataObjectClass;

     }

     /**

      * @see org.kuali.rice.krad.maintenance.Maintainable#getMaintenanceAction

      */

     @Override

     public String getMaintenanceAction() {

         return maintenanceAction;

     }

     /**

      * @see org.kuali.rice.krad.maintenance.Maintainable#setMaintenanceAction

      */

     @Override

     public void setMaintenanceAction(String maintenanceAction) {

         this.maintenanceAction = maintenanceAction;

     }

     /**

      * Note: as currently implemented, every key field for a given

      * data object class must have a visible getter

      *

      * @see org.kuali.rice.krad.maintenance.Maintainable#generateMaintenanceLocks

      */

     @Override

     public List<MaintenanceLock> generateMaintenanceLocks() {

         List<MaintenanceLock> maintenanceLocks = new ArrayList<MaintenanceLock>();

         StringBuffer lockRepresentation = new StringBuffer(dataObjectClass.getName());

         lockRepresentation.append(KRADConstants.Maintenance.LOCK_AFTER_CLASS_DELIM);

         Object bo = getDataObject();

         List keyFieldNames = getDocumentDictionaryService().getLockingKeys(getDocumentTypeName());

         for (Iterator i = keyFieldNames.iterator(); i.hasNext(); ) {

             String fieldName = (String) i.next();

             Object fieldValue = ObjectUtils.getPropertyValue(bo, fieldName);

             if (fieldValue == null) {

                 fieldValue = "";

             }

             // check if field is a secure

             if (getDataObjectAuthorizationService()

                     .attributeValueNeedsToBeEncryptedOnFormsAndLinks(dataObjectClass, fieldName)) {

                 try {

                     fieldValue = getEncryptionService().encrypt(fieldValue);

                 } catch (GeneralSecurityException e) {

                     LOG.error("Unable to encrypt secure field for locking representation " + e.getMessage());

                     throw new RuntimeException(

                             "Unable to encrypt secure field for locking representation " + e.getMessage());

                 }

             }

             lockRepresentation.append(fieldName);

             lockRepresentation.append(KRADConstants.Maintenance.LOCK_AFTER_FIELDNAME_DELIM);

             lockRepresentation.append(String.valueOf(fieldValue));

             if (i.hasNext()) {

                 lockRepresentation.append(KRADConstants.Maintenance.LOCK_AFTER_VALUE_DELIM);

             }

         }

         MaintenanceLock maintenanceLock = new MaintenanceLock();

         maintenanceLock.setDocumentNumber(documentNumber);

         maintenanceLock.setLockingRepresentation(lockRepresentation.toString());

         maintenanceLocks.add(maintenanceLock);

         return maintenanceLocks;

     }

     /**

      * Retrieves the document type name from the data dictionary based on

      * business object class

      */

     protected String getDocumentTypeName() {

         return getDocumentDictionaryService().getMaintenanceDocumentTypeName(dataObjectClass);

     }

     /**

      * @see org.kuali.rice.krad.maintenance.Maintainable#saveDataObject

      */

     @Override

     public void saveDataObject() {

         if (dataObject instanceof PersistableBusinessObject) {

             getBusinessObjectService().linkAndSave((PersistableBusinessObject) dataObject);

         } else {

             throw new RuntimeException(

                     "Cannot save object of type: " + dataObjectClass + " with business object service");

         }

     }

     /**

      * @see org.kuali.rice.krad.maintenance.Maintainable#deleteDataObject

      */

     @Override

     public void deleteDataObject() {

         if (dataObject == null) {

             return;

         }

         if (dataObject instanceof PersistableBusinessObject) {

             getBusinessObjectService().delete((PersistableBusinessObject) dataObject);

             dataObject = null;

         } else {

             throw new RuntimeException(

                     "Cannot delete object of type: " + dataObjectClass + " with business object service");

         }

     }

     /**

      * @see org.kuali.rice.krad.maintenance.Maintainable#doRouteStatusChange

      */

     @Override

     public void doRouteStatusChange(DocumentHeader documentHeader) {

         // no default implementation

     }

     /**

      * @see org.kuali.rice.krad.maintenance.Maintainable#getLockingDocumentId

      */

     @Override

     public String getLockingDocumentId() {

         return getMaintenanceDocumentService().getLockingDocumentId(this, documentNumber);

     }

     /**

      * @see org.kuali.rice.krad.maintenance.Maintainable#getWorkflowEngineDocumentIdsToLock

      */

     @Override

     public List<Long> getWorkflowEngineDocumentIdsToLock() {

         return null;

     }

     /**

      * Default implementation simply returns false to indicate that custom

      * lock descriptors are not supported by MaintainableImpl. If custom

      * lock descriptors are needed, the appropriate subclasses should override

      * this method

      *

      * @see org.kuali.rice.krad.maintenance.Maintainable#useCustomLockDescriptors

      */

     @Override

     public boolean useCustomLockDescriptors() {

         return false;

     }

     /**

      * Default implementation just throws a PessimisticLockingException.

      * Subclasses of MaintainableImpl that need support for custom lock

      * descriptors should override this method

      *

      * @see org.kuali.rice.krad.maintenance.Maintainable#getCustomLockDescriptor

      */

     @Override

     public String getCustomLockDescriptor(Person user) {

         throw new PessimisticLockingException("The Maintainable for document " + documentNumber +

                 " is using pessimistic locking with custom lock descriptors, but the Maintainable has not overridden the getCustomLockDescriptor method");

     }

     /**

      * @see org.kuali.rice.krad.maintenance.Maintainable#isBoNotesEnabled

      */

     @Override

     public boolean isNotesEnabled() {

         if (BusinessObject.class.isAssignableFrom(dataObjectClass)) {

             return getDataObjectMetaDataService().areNotesSupported(dataObjectClass);

         }

         return false;

     }

     /**

      * @see org.kuali.rice.krad.maintenance.MaintainableImpl#isExternalBusinessObject

      */

     @Override

     public boolean isExternalBusinessObject() {

         return false;

     }

     /**

      * @see org.kuali.rice.krad.maintenance.MaintainableImpl#prepareExternalBusinessObject

      */

     @Override

     public void prepareExternalBusinessObject(BusinessObject businessObject) {

         // by default do nothing

     }

     /**

      * Checks whether the data object is not null and has its primary key values populated

      *

      * @see org.kuali.rice.krad.maintenance.MaintainableImpl#isOldDataObjectInDocument

      */

     @Override

     public boolean isOldDataObjectInDocument() {

         boolean isOldDataObjectInExistence = true;

         if (getDataObject() == null) {

             isOldDataObjectInExistence = false;

         } else {

             Map<String, ?> keyFieldValues = getDataObjectMetaDataService().getPrimaryKeyFieldValues(getDataObject());

             for (Object keyValue : keyFieldValues.values()) {

                 if (keyValue == null) {

                     isOldDataObjectInExistence = false;

                 } else if ((keyValue instanceof String) && StringUtils.isBlank((String) keyValue)) {

                     isOldDataObjectInExistence = false;

                 }

                 if (!isOldDataObjectInExistence) {

                     break;

                 }

             }

         }

         return isOldDataObjectInExistence;

     }

     /**

      * @see org.kuali.rice.krad.maintenance.Maintainable#prepareForSave

      */

     @Override

     public void prepareForSave() {

         // by default do nothing

     }

     /**

      * @see org.kuali.rice.krad.maintenance.Maintainable#processAfterRetrieve

      */

     @Override

     public void processAfterRetrieve() {

         // by default do nothing

     }

     /**

      * @see org.kuali.rice.krad.maintenance.MaintainableImpl#setupNewFromExisting

      */

     @Override

     public void setupNewFromExisting(MaintenanceDocument document, Map<String, String[]> parameters) {

         // by default do nothing

     }

     /**

      * @see org.kuali.rice.krad.maintenance.Maintainable#processAfterCopy

      */

     @Override

     public void processAfterCopy(MaintenanceDocument document, Map<String, String[]> requestParameters) {

         // by default do nothing

     }

     /**

      * @see org.kuali.rice.krad.maintenance.Maintainable#processAfterEdit

      */

     @Override

     public void processAfterEdit(MaintenanceDocument document, Map<String, String[]> requestParameters) {

         // by default do nothing

     }

     /**

      * @see org.kuali.rice.krad.maintenance.Maintainable#processAfterNew

      */

     @Override

     public void processAfterNew(MaintenanceDocument document, Map<String, String[]> requestParameters) {

         // by default do nothing

     }

     /**

      * @see org.kuali.rice.krad.maintenance.Maintainable#processAfterPost

      */

     @Override

     public void processAfterPost(MaintenanceDocument document, Map<String, String[]> requestParameters) {

         // by default do nothing

     }

     /**

      * In the case of edit maintenance adds a new blank line to the old side

      *

      * TODO: should this write some sort of missing message on the old side

      * instead?

      *

      * @see org.kuali.rice.krad.uif.service.impl.ViewHelperServiceImpl#processAfterAddLine(org.kuali.rice.krad.uif.container.View,

      *      org.kuali.rice.krad.uif.container.CollectionGroup, java.lang.Object,

      *      java.lang.Object)

      */

     @Override

     protected void processAfterAddLine(View view, CollectionGroup collectionGroup, Object model, Object addLine) {

         super.processAfterAddLine(view, collectionGroup, model, addLine);

         if (KRADConstants.MAINTENANCE_EDIT_ACTION.equals(maintenanceAction)) {

             MaintenanceForm maintenanceForm = (MaintenanceForm) model;

             MaintenanceDocument document = maintenanceForm.getDocument();

             // get the old object's collection

             Collection<Object> oldCollection = ObjectPropertyUtils

                     .getPropertyValue(document.getOldMaintainableObject().getDataObject(),

                             collectionGroup.getPropertyName());

             try {

                 Object blankLine = getDataObjectClass().newInstance();

                 oldCollection.add(blankLine);

             } catch (Exception e) {

                 throw new RuntimeException("Unable to create new line instance for old maintenance object", e);

             }

         }

     }

     /**

      * Retrieves the document number configured on this maintainable

      *

      * @return String document number

      */

     protected String getDocumentNumber() {

         return this.documentNumber;

     }

     protected LookupService getLookupService() {

         if (lookupService == null) {

             lookupService = KRADServiceLocatorWeb.getLookupService();

         }

         return this.lookupService;

     }

     public void setLookupService(LookupService lookupService) {

         this.lookupService = lookupService;

     }

     protected DataObjectAuthorizationService getDataObjectAuthorizationService() {

         if (dataObjectAuthorizationService == null) {

             this.dataObjectAuthorizationService = KRADServiceLocatorWeb.getDataObjectAuthorizationService();

         }

         return dataObjectAuthorizationService;

     }

     public void setDataObjectAuthorizationService(DataObjectAuthorizationService dataObjectAuthorizationService) {

         this.dataObjectAuthorizationService = dataObjectAuthorizationService;

     }

     protected DataObjectMetaDataService getDataObjectMetaDataService() {

         if (dataObjectMetaDataService == null) {

             this.dataObjectMetaDataService = KRADServiceLocatorWeb.getDataObjectMetaDataService();

         }

         return dataObjectMetaDataService;

     }

     public void setDataObjectMetaDataService(DataObjectMetaDataService dataObjectMetaDataService) {

         this.dataObjectMetaDataService = dataObjectMetaDataService;

     }

     public DocumentDictionaryService getDocumentDictionaryService() {

         if (documentDictionaryService == null) {

             this.documentDictionaryService = KRADServiceLocatorWeb.getDocumentDictionaryService();

         }

         return documentDictionaryService;

     }

     public void setDocumentDictionaryService(DocumentDictionaryService documentDictionaryService) {

         this.documentDictionaryService = documentDictionaryService;

     }

     protected EncryptionService getEncryptionService() {

         if (encryptionService == null) {

             encryptionService = CoreApiServiceLocator.getEncryptionService();

         }

         return encryptionService;

     }

     public void setEncryptionService(EncryptionService encryptionService) {

         this.encryptionService = encryptionService;

     }

     protected BusinessObjectService getBusinessObjectService() {

         if (businessObjectService == null) {

             businessObjectService = KRADServiceLocator.getBusinessObjectService();

         }

         return businessObjectService;

     }

     public void setBusinessObjectService(BusinessObjectService businessObjectService) {

         this.businessObjectService = businessObjectService;

     }

     protected MaintenanceDocumentService getMaintenanceDocumentService() {

         if (maintenanceDocumentService == null) {

             maintenanceDocumentService = KRADServiceLocatorWeb.getMaintenanceDocumentService();

         }

         return maintenanceDocumentService;

     }

     public void setMaintenanceDocumentService(MaintenanceDocumentService maintenanceDocumentService) {

         this.maintenanceDocumentService = maintenanceDocumentService;

     }

 }