001/*
002 * (C) Copyright 2016 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 *     "Guillaume Renard"
018 */
019
020package org.nuxeo.ecm.platform.tag.io;
021
022import static org.nuxeo.ecm.core.io.registry.reflect.Instantiations.SINGLETON;
023import static org.nuxeo.ecm.core.io.registry.reflect.Priorities.REFERENCE;
024
025import java.io.IOException;
026
027import org.codehaus.jackson.JsonGenerator;
028import org.nuxeo.ecm.core.api.DocumentModel;
029import org.nuxeo.ecm.core.io.marshallers.json.enrichers.AbstractJsonEnricher;
030import org.nuxeo.ecm.core.io.registry.context.RenderingContext.SessionWrapper;
031import org.nuxeo.ecm.core.io.registry.reflect.Setup;
032import org.nuxeo.ecm.platform.tag.TagService;
033import org.nuxeo.runtime.api.Framework;
034
035/**
036 * Enricher that add the tags associated to the document.
037 *
038 * @since 8.3
039 */
040@Setup(mode = SINGLETON, priority = REFERENCE)
041public class TagsJsonEnricher extends AbstractJsonEnricher<DocumentModel> {
042
043    public static final String NAME = "tags";
044
045    public TagsJsonEnricher() {
046        super(NAME);
047    }
048
049    @Override
050    public void write(JsonGenerator jg, DocumentModel document) throws IOException {
051        TagService tagService = Framework.getService(TagService.class);
052        jg.writeArrayFieldStart(NAME);
053        try (SessionWrapper wrapper = ctx.getSession(document)) {
054            for (String tag : tagService.getTags(wrapper.getSession(), document.getId())) {
055                jg.writeString(tag);
056            }
057        }
058        jg.writeEndArray();
059
060    }
061
062}