/*
* 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.module;
import java.beans.PropertyChangeEvent;
import java.beans.PropertyChangeListener;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;
import org.jspresso.framework.action.IActionHandler;
import org.jspresso.framework.application.backend.action.AbstractQbeAction;
import org.jspresso.framework.application.backend.action.BackendAction;
import org.jspresso.framework.application.backend.action.CreateQueryComponentAction;
import org.jspresso.framework.application.backend.action.IQueryComponentRefiner;
import org.jspresso.framework.application.model.FilterableBeanCollectionModule;
import org.jspresso.framework.application.model.descriptor.FilterableBeanCollectionModuleDescriptor;
import org.jspresso.framework.model.component.IComponent;
import org.jspresso.framework.model.component.IQueryComponent;
import org.jspresso.framework.model.descriptor.IComponentDescriptor;
import org.jspresso.framework.model.descriptor.IPropertyDescriptor;
import org.jspresso.framework.model.descriptor.IRelationshipEndPropertyDescriptor;
import org.jspresso.framework.util.collection.IPageable;
import org.jspresso.framework.view.descriptor.ICollectionViewDescriptor;
import org.jspresso.framework.view.descriptor.IPropertyViewDescriptor;
import org.jspresso.framework.view.descriptor.ITableViewDescriptor;
import org.jspresso.framework.view.descriptor.basic.BasicCollectionViewDescriptor;
/**
* Initialize a module filter with a brand new query component and resets the
* module objects collection.
*
* @author Vincent Vandenschrick
*/
public class InitModuleFilterAction extends BackendAction {
private CreateQueryComponentAction createQueryComponentAction;
private IQueryComponentRefiner queryComponentRefiner;
/**
* Initializes the module filter and resets the bean collection.
* <p/>
* {@inheritDoc}
*/
@SuppressWarnings("unchecked")
@Override
public boolean execute(final IActionHandler actionHandler, final Map<String, Object> context) {
final FilterableBeanCollectionModule filterableBeanCollectionModule = (FilterableBeanCollectionModule) getModule(
context);
context.put(CreateQueryComponentAction.COMPONENT_REF_DESCRIPTOR,
((IComponentDescriptor<?>) filterableBeanCollectionModule.getViewDescriptor().getModelDescriptor())
.getPropertyDescriptor(FilterableBeanCollectionModuleDescriptor.FILTER));
final IQueryComponent queryComponent;
if (createQueryComponentAction != null) {
actionHandler.execute(createQueryComponentAction, context);
queryComponent = (IQueryComponent) context.get(IQueryComponent.QUERY_COMPONENT);
} else {
queryComponent = getEntityFactory(context).createQueryComponentInstance(
(Class<? extends IComponent>) filterableBeanCollectionModule.getElementComponentDescriptor()
.getComponentContract());
}
ICollectionViewDescriptor moduleObjectsViewDescriptor = BasicCollectionViewDescriptor.extractMainCollectionView(
filterableBeanCollectionModule.getProjectedViewDescriptor());
if (moduleObjectsViewDescriptor instanceof ITableViewDescriptor) {
List<String> prefetchProperties = new ArrayList<>();
for (IPropertyViewDescriptor columnDescriptor : ((ITableViewDescriptor) moduleObjectsViewDescriptor)
.getColumnViewDescriptors()) {
IPropertyDescriptor columnPropertyDescriptor = (IPropertyDescriptor) columnDescriptor.getModelDescriptor();
if (columnPropertyDescriptor != null && columnPropertyDescriptor.isComputed()
|| columnPropertyDescriptor instanceof IRelationshipEndPropertyDescriptor) {
prefetchProperties.add(columnPropertyDescriptor.getName());
}
}
queryComponent.setPrefetchProperties(prefetchProperties);
}
if (queryComponentRefiner != null) {
queryComponentRefiner.refineQueryComponent(queryComponent, context);
}
IQueryComponent previousFilter = filterableBeanCollectionModule.getFilter();
if (previousFilter != null) {
queryComponent.setOrderingProperties(previousFilter.getOrderingProperties());
}
filterableBeanCollectionModule.setFilter(queryComponent);
filterableBeanCollectionModule.setModuleObjects(null);
if (filterableBeanCollectionModule.getPagingAction() != null) {
PropertyChangeListener paginationListener = new PropertyChangeListener() {
@Override
public void propertyChange(PropertyChangeEvent evt) {
if (evt.getOldValue() != null && evt.getNewValue() != null) {
try {
context.put(AbstractQbeAction.PAGINATE, null);
actionHandler.execute(filterableBeanCollectionModule.getPagingAction(), context);
} finally {
context.remove(AbstractQbeAction.PAGINATE);
}
}
}
};
queryComponent.addPropertyChangeListener(IPageable.PAGE, paginationListener);
}
return super.execute(actionHandler, context);
}
/**
* Sets the createQueryComponentAction.
*
* @param createQueryComponentAction
* the createQueryComponentAction to set.
*/
public void setCreateQueryComponentAction(CreateQueryComponentAction createQueryComponentAction) {
this.createQueryComponentAction = createQueryComponentAction;
}
/**
* Sets the queryComponentRefiner.
*
* @param queryComponentRefiner
* the queryComponentRefiner to set.
*/
public void setQueryComponentRefiner(IQueryComponentRefiner queryComponentRefiner) {
this.queryComponentRefiner = queryComponentRefiner;
}
}