001/*
002 * (C) Copyright 2006-2015 Nuxeo SA (http://nuxeo.com/) and others.
003 *
004 * Licensed under the Apache License, Version 2.0 (the "License");
005 * you may not use this file except in compliance with the License.
006 * You may obtain a copy of the License at
007 *
008 *     http://www.apache.org/licenses/LICENSE-2.0
009 *
010 * Unless required by applicable law or agreed to in writing, software
011 * distributed under the License is distributed on an "AS IS" BASIS,
012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
013 * See the License for the specific language governing permissions and
014 * limitations under the License.
015 *
016 * Contributors:
017 *     Alexandre Russel
018 *     Florent Guillaume
019 */
020
021package org.nuxeo.ecm.platform.annotations.service;
022
023import java.net.URI;
024import java.util.ArrayList;
025import java.util.HashMap;
026import java.util.List;
027import java.util.Map;
028
029import org.nuxeo.ecm.platform.annotations.api.Annotation;
030import org.nuxeo.ecm.platform.annotations.api.AnnotationManager;
031import org.nuxeo.ecm.platform.annotations.api.AnnotationsConstants;
032import org.nuxeo.ecm.platform.relations.api.Graph;
033import org.nuxeo.ecm.platform.relations.api.Node;
034import org.nuxeo.ecm.platform.relations.api.QueryResult;
035import org.nuxeo.ecm.platform.relations.api.Statement;
036import org.nuxeo.ecm.platform.relations.api.impl.StatementImpl;
037
038public class AnnotationQuery {
039
040    private final AnnotationManager manager = new AnnotationManager();
041
042    public List<Annotation> getAnnotationsForURIs(URI uri, Graph graph) {
043        List<Annotation> annotations = new ArrayList<Annotation>();
044        String query = "SELECT ?s ?p ?o WHERE { ?s ?p ?o . " //
045                + "?s <" + AnnotationsConstants.A_ANNOTATES + "> <" + uri.toString() + "> . }";
046        QueryResult results = graph.query(query, "sparql", null);
047        Map<String, List<Statement>> mapann = new HashMap<String, List<Statement>>();
048        for (Map<String, Node> map : results.getResults()) {
049            Node subject = map.get("s");
050            Node predicate = map.get("p");
051            Node object = map.get("o");
052            List<Statement> statements = mapann.get(subject.toString());
053            if (statements == null) {
054                statements = new ArrayList<Statement>();
055                mapann.put(subject.toString(), statements);
056            }
057            statements.add(new StatementImpl(subject, predicate, object));
058        }
059        for (List<Statement> stats : mapann.values()) {
060            annotations.add(manager.getAnnotation(stats));
061        }
062        return annotations;
063    }
064
065    public int getAnnotationsCountForURIs(URI uri, Graph graph) {
066        String query = "SELECT ?s WHERE { ?s <" + AnnotationsConstants.A_ANNOTATES + "> <" + uri.toString() + "> }";
067        return graph.queryCount(query, "sparql", null);
068    }
069
070}