1 /*******************************************************************************
2 * Copyright (c) 2007, 2010 Association for Decentralized Information Management
4 * All rights reserved. This program and the accompanying materials
5 * are made available under the terms of the Eclipse Public License v1.0
6 * which accompanies this distribution, and is available at
7 * http://www.eclipse.org/legal/epl-v10.html
10 * VTT Technical Research Centre of Finland - initial API and implementation
11 *******************************************************************************/
12 package org.simantics.db.layer0.genericrelation;
14 import org.simantics.db.ReadGraph;
15 import org.simantics.db.Resource;
16 import org.simantics.db.common.request.UniqueRead;
17 import org.simantics.db.exception.DatabaseException;
18 import org.simantics.db.layer0.adapter.GenericRelationIndex;
19 import org.simantics.db.service.QueryControl;
20 import org.simantics.operation.Layer0X;
21 import org.simantics.scl.runtime.function.FunctionImpl4;
22 import org.simantics.scl.runtime.function.UnsaturatedFunction2;
23 import org.slf4j.LoggerFactory;
26 * dependencyResources:
27 * (ReadGraph, Resource model, String query) -> List<Resource>
28 * (ReadGraph, Resource model, String query, Integer maxResults) -> List<Resource>
30 * @author Antti Villberg
32 public class DependencyResources extends FunctionImpl4<ReadGraph, Resource, String, Integer, Object> {
34 private static final org.slf4j.Logger LOGGER = LoggerFactory.getLogger(DependencyResources.class);
36 protected Resource getIndexRelation(ReadGraph graph) {
37 return Layer0X.getInstance(graph).DependenciesRelation;
40 protected String getBindingPattern() {
41 return Dependencies.getBindingPattern();
45 public Object apply(ReadGraph p0, Resource p1) {
46 return new UnsaturatedFunction2(this, p0, p1);
50 public Object apply(ReadGraph p0, Resource p1, String p2) {
51 return apply(p0, p1, p2, Integer.MAX_VALUE);
55 public Object apply(ReadGraph graph, final Resource model, final String query, Integer _maxResults) {
59 final GenericRelationIndex index = graph.adapt(getIndexRelation(graph), GenericRelationIndex.class);
62 graph.syncRequest(new ExternalRequest(index, model));
64 final int maxResults = _maxResults != null ? _maxResults : Integer.MAX_VALUE;
66 QueryControl qc = graph.getService(QueryControl.class);
67 return qc.syncRequestIndependent(graph, new UniqueRead<Object>() {
69 public Object perform(ReadGraph graph) throws DatabaseException {
70 return index.queryResources(graph, query, getBindingPattern(), new Object[] { model }, maxResults);
74 } catch (DatabaseException e) {
75 LOGGER.error("Error while performing index query", e);