org.unitime.timetable.export.events.EventsExportEventsToJSON.java Source code

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Here is the source code for org.unitime.timetable.export.events.EventsExportEventsToJSON.java

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/*
 * Licensed to The Apereo Foundation under one or more contributor license
 * agreements. See the NOTICE file distributed with this work for
 * additional information regarding copyright ownership.
 *
 * The Apereo Foundation licenses this file to you under the Apache License,
 * Version 2.0 (the "License"); you may not use this file except in
 * compliance with the License. You may obtain a copy of the License at:
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *
 * See the License for the specific language governing permissions and
 * limitations under the License.
 * 
*/
package org.unitime.timetable.export.events;

import java.io.IOException;
import java.lang.reflect.Field;
import java.lang.reflect.Type;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.List;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

import org.springframework.stereotype.Service;
import org.unitime.timetable.export.ExportHelper;
import org.unitime.timetable.gwt.client.events.EventComparator.EventMeetingSortBy;
import org.unitime.timetable.gwt.shared.EventInterface;
import org.unitime.timetable.gwt.shared.EventInterface.EventLookupRpcRequest;

import com.google.gson.FieldNamingStrategy;
import com.google.gson.Gson;
import com.google.gson.GsonBuilder;
import com.google.gson.JsonElement;
import com.google.gson.JsonPrimitive;
import com.google.gson.JsonSerializationContext;
import com.google.gson.JsonSerializer;

/**
 * @author Tomas Muller
 */
@Service("org.unitime.timetable.export.Exporter:events.json")
public class EventsExportEventsToJSON extends EventsExporter {

    @Override
    public String reference() {
        return "events.json";
    }

    @Override
    protected void print(ExportHelper helper, EventLookupRpcRequest request, List<EventInterface> events,
            int eventCookieFlags, EventMeetingSortBy sort, boolean asc) throws IOException {
        helper.setup("application/json", reference(), false);

        Gson gson = new GsonBuilder().registerTypeAdapter(Date.class, new JsonSerializer<Date>() {
            @Override
            public JsonElement serialize(Date src, Type typeOfSrc, JsonSerializationContext context) {
                return new JsonPrimitive(new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ss'Z'").format(src));
            }
        }).setFieldNamingStrategy(new FieldNamingStrategy() {
            Pattern iPattern = Pattern.compile("i([A-Z])(.*)");

            @Override
            public String translateName(Field f) {
                Matcher matcher = iPattern.matcher(f.getName());
                if (matcher.matches())
                    return matcher.group(1).toLowerCase() + matcher.group(2);
                else
                    return f.getName();
            }
        }).setPrettyPrinting().create();

        helper.getWriter().write(gson.toJson(events));
    }
}