/*
* Copyright (c) 2005-2016 Vincent Vandenschrick. All rights reserved.
*
* This file is part of the Jspresso framework.
*
* Jspresso is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* Jspresso is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with Jspresso. If not, see <http://www.gnu.org/licenses/>.
*/
package org.jspresso.framework.application.backend.action.persistence.module;
import java.lang.reflect.InvocationTargetException;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;
import org.springframework.transaction.TransactionStatus;
import org.springframework.transaction.support.TransactionCallbackWithoutResult;
import org.jspresso.framework.action.ActionException;
import org.jspresso.framework.action.IActionHandler;
import org.jspresso.framework.application.backend.IBackendController;
import org.jspresso.framework.application.backend.action.BackendAction;
import org.jspresso.framework.application.model.BeanCollectionModule;
import org.jspresso.framework.application.model.BeanModule;
import org.jspresso.framework.application.model.Module;
import org.jspresso.framework.binding.ICollectionConnector;
import org.jspresso.framework.binding.IValueConnector;
import org.jspresso.framework.model.entity.IEntity;
/**
* This action, which is to be used on bean collection modules, removes the
* selected objects from the module's projected collection <b>and deletes them
* from the persistent store</b>. If one (or more) of the removed objects are
* also used in children bean modules, the corresponding children bean modules
* are also removed accordingly. It is versatile enough to work on mobile collection module
* details.
*
* @author Vincent Vandenschrick
*/
public class RemoveFromModuleObjectsAction extends BackendAction {
/**
* Constructs a new {@code RemoveFromModuleObjectsAction} instance.
*/
public RemoveFromModuleObjectsAction() {
// Disable bad frontend access checks.
setBadFrontendAccessChecked(false);
}
private static void removeFromSubModules(Module parentModule,
Object removedObject) {
if (parentModule.getSubModules() != null) {
for (Module module : new ArrayList<>(parentModule.getSubModules())) {
if (module instanceof BeanModule
&& removedObject.equals(((BeanModule) module).getModuleObject())) {
parentModule.removeSubModule(module);
}
}
}
}
/**
* Removes the selected objects from the projected collection.
* <p>
* {@inheritDoc}
*/
@Override
public boolean execute(IActionHandler actionHandler,
final Map<String, Object> context) {
IValueConnector modelConnector = getModelConnector(context);
final List<Object> moduleObjectsToRemove = new ArrayList<>();
if (modelConnector instanceof ICollectionConnector) {
int[] selectedIndices = getSelectedIndices(context);
ICollectionConnector collectionConnector = (ICollectionConnector) modelConnector;
if (selectedIndices == null || selectedIndices.length == 0) {
return false;
}
for (int selectedIndice : selectedIndices) {
moduleObjectsToRemove.add(collectionConnector.getChildConnector(selectedIndice).getConnectorValue());
}
} else {
moduleObjectsToRemove.add(modelConnector.getConnectorValue());
}
BeanCollectionModule module = (BeanCollectionModule) getModule(context);
List<Object> projectedCollection;
if (module.getModuleObjects() == null) {
projectedCollection = new ArrayList<>();
} else {
projectedCollection = new ArrayList<>(module.getModuleObjects());
}
getTransactionTemplate(context).execute(
new TransactionCallbackWithoutResult() {
@Override
protected void doInTransactionWithoutResult(TransactionStatus status) {
try {
getController(context).performPendingOperations();
} catch (RuntimeException ex) {
getController(context).clearPendingOperations();
throw ex;
}
List<Object> uowClones = new ArrayList<>();
IBackendController controller = getController(context);
for (Object moduleObjectToRemove : moduleObjectsToRemove) {
if (moduleObjectToRemove instanceof IEntity) {
uowClones.add(controller
.cloneInUnitOfWork((IEntity) moduleObjectToRemove));
} else {
uowClones.add(moduleObjectToRemove);
}
}
for (Object moduleObjectToRemove : uowClones) {
if (moduleObjectToRemove instanceof IEntity) {
try {
deleteEntity((IEntity) moduleObjectToRemove, context);
} catch (IllegalAccessException | NoSuchMethodException ex) {
throw new ActionException(ex);
} catch (InvocationTargetException ex) {
if (ex.getCause() instanceof RuntimeException) {
throw (RuntimeException) ex.getCause();
}
throw new ActionException(ex.getCause());
}
}
}
}
});
for (Object moduleObjectToRemove : moduleObjectsToRemove) {
projectedCollection.remove(moduleObjectToRemove);
removeFromSubModules(module, moduleObjectToRemove);
}
module.setModuleObjects(projectedCollection);
//collectionConnector.setConnectorValue(projectedCollection);
setActionParameter(moduleObjectsToRemove, context);
return super.execute(actionHandler, context);
}
/**
* Deletes the entity from the persistent store.
*
* @param entity
* the entity to remove
* @param context
* the action context.
* @throws NoSuchMethodException
* whenever this exception occurs.
* @throws java.lang.reflect.InvocationTargetException
* whenever this exception occurs.
* @throws IllegalAccessException
* whenever this exception occurs.
*/
protected void deleteEntity(IEntity entity, Map<String, Object> context)
throws IllegalAccessException, InvocationTargetException,
NoSuchMethodException {
cleanRelationshipsOnDeletion(entity, context, true);
cleanRelationshipsOnDeletion(entity, context, false);
// Now handled in cleanRelationshipsOnDeletion when dryRun=false.
// getController(context).registerForDeletion(entity);
}
}