Java tutorial
/* * ome.services.query.CollectionCountQueryDefinition * * Copyright 2006 University of Dundee. All rights reserved. * Use is subject to license terms supplied in LICENSE.txt */ /*------------------------------------------------------------------------------ * * Written by: Josh Moore <josh.moore@gmx.de> * *------------------------------------------------------------------------------ */ package ome.services.query; // Java imports import java.sql.SQLException; import java.util.Collection; // Third-party libraries import org.hibernate.HibernateException; import org.hibernate.Session; // Application-internal dependencies import ome.parameters.Parameters; import ome.tools.lsid.LsidUtils; /** * counts the number of members in a collection. This query is used by the * {@link ome.api.IContainer IContainer} interface (possbly among others) to add * information to outgoing results. * * @author Josh Moore, <a href="mailto:josh.moore@gmx.de">josh.moore@gmx.de</a> * @version 1.0 <small> (<b>Internal version:</b> $Rev$ $Date$) </small> * @since OMERO 3.0 * @see Details#getCounts() */ public class CollectionCountQueryDefinition extends Query { static Definitions defs = new Definitions(new IdsQueryParameterDef(), new QueryParameterDef("field", String.class, false)); public CollectionCountQueryDefinition(Parameters parameters) { super(defs, parameters); } @Override protected void buildQuery(Session session) throws HibernateException, SQLException { String s_field = (String) value("field"); // TODO Generics??? if not // in arrays! String s_target = LsidUtils.parseType(s_field); String s_collection = LsidUtils.parseField(s_field); String s_query = String.format( "select target.id, count(collection) from %s target " + "join target.%s collection " + (check("ids") ? "where target.id in (:ids)" : "") + "group by target.id", s_target, s_collection); org.hibernate.Query q = session.createQuery(s_query); if (check("ids")) { q.setParameterList("ids", (Collection) value("ids")); } setQuery(q); } // TODO filters...? }