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 <grenard@nuxeo.com>
018 */
019
020package org.nuxeo.ecm.core.io.marshallers.json.enrichers;
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.nuxeo.ecm.core.api.DocumentModel;
028import org.nuxeo.ecm.core.io.registry.context.RenderingContext.SessionWrapper;
029import org.nuxeo.ecm.core.io.registry.reflect.Setup;
030import org.nuxeo.ecm.core.query.sql.NXQL;
031
032import com.fasterxml.jackson.core.JsonGenerator;
033
034/**
035 * @since 8.10
036 */
037@Setup(mode = SINGLETON, priority = REFERENCE)
038public class HasFolderishChildJsonEnricher extends AbstractJsonEnricher<DocumentModel> {
039
040    public static final String NAME = "hasFolderishChild";
041
042    public HasFolderishChildJsonEnricher() {
043        super(NAME);
044    }
045
046    @Override
047    public void write(JsonGenerator jg, DocumentModel document) throws IOException {
048        if (!document.isFolder()) {
049            jg.writeBooleanField(NAME, false);
050            return;
051        }
052        try (SessionWrapper wrapper = ctx.getSession(document)) {
053            String fetchFolderishChildQuery = "SELECT * FROM Document WHERE ecm:mixinType = 'Folderish'"
054                    + " AND ecm:mixinType != 'HiddenInNavigation' AND ecm:isTrashed = 0"
055                    + " AND ecm:parentId = " + NXQL.escapeString(document.getId());
056            // Limit result set to 1 as we just want to know if there's at least one Folderish child
057            boolean hasChildren = !wrapper.getSession().queryProjection(fetchFolderishChildQuery, 1, 0).isEmpty();
058            jg.writeBooleanField(NAME, hasChildren);
059        }
060    }
061
062}