org.trails.component.HibernateAssociationSelect Maven / Gradle / Ivy

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package org.trails.component;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.tapestry.annotations.ComponentClass;
import org.apache.tapestry.annotations.InjectObject;
import org.apache.tapestry.annotations.Parameter;
import org.apache.tapestry.form.IPropertySelectionModel;
import org.hibernate.criterion.DetachedCriteria;
import org.trails.persistence.HibernatePersistenceService;

/**
 * This guy interacts with persistence service to produce a Select
 * containing all the elements of the PropertyDescriptor's type.  If
 * a criteria is specified, it will filter the list by it.
 */
@ComponentClass(allowBody = false, allowInformalParameters = true)
public abstract class HibernateAssociationSelect extends AssociationSelect
{
	private static final Log LOG = LogFactory.getLog(HibernateAssociationSelect.class);

	/**
	 * @todo: remove when the components reuse issue goes away
	 */
	@InjectObject("spring:persistenceService")
	public abstract HibernatePersistenceService getHibernatePersistenceService();

	/**
	 * @todo: remove when the components reuse issue goes away
	 */
	@Override
	public HibernatePersistenceService getPersistenceService()
	{
		return getHibernatePersistenceService();
	}

	@Parameter(required = false)
	public abstract DetachedCriteria getCriteria();

	@Override
	public IPropertySelectionModel buildSelectionModel()
	{
		if (LOG.isDebugEnabled())
		{
			LOG.debug("Building propertySelectionModel for " + getClassDescriptor().getDisplayName());
		}

		DetachedCriteria criteria = getCriteria() != null ? getCriteria() : DetachedCriteria.forClass(getClassDescriptor().getType());
		IdentifierSelectionModel selectionModel = new IdentifierSelectionModel(
			getPersistenceService().getInstances(getClassDescriptor().getType(), criteria),
			getClassDescriptor().getIdentifierDescriptor().getName(),
			isAllowNone());
		selectionModel.setNoneLabel(getNoneLabel());
		return selectionModel;
	}
}