mobi.jenkinsci.alm.assembla.client.CalendarSerializer.java Source code

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Here is the source code for mobi.jenkinsci.alm.assembla.client.CalendarSerializer.java

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// Copyright (C) 2013 GerritForge www.gerritforge.com
//
// Licensed 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 mobi.jenkinsci.alm.assembla.client;

import java.lang.reflect.Type;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

import com.google.gson.JsonDeserializationContext;
import com.google.gson.JsonDeserializer;
import com.google.gson.JsonElement;
import com.google.gson.JsonParseException;
import com.google.gson.JsonPrimitive;
import com.google.gson.JsonSerializationContext;
import com.google.gson.JsonSerializer;

public class CalendarSerializer implements JsonSerializer<Calendar>, JsonDeserializer<Calendar> {
    private static final SimpleDateFormat calendarFormat = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ssZ");
    private static final Pattern ASSEMBLA_TZ_PATTERN = Pattern
            .compile("\\d\\d\\:\\d\\d\\:\\d\\d([\\+\\-]\\d\\d\\:\\d\\d)");
    private static final Pattern DATEFMT_TZ_PATTERN = Pattern
            .compile("\\d\\d\\:\\d\\d\\:\\d\\d([\\+\\-]\\d\\d\\\\d\\d)");

    @Override
    public Calendar deserialize(JsonElement json, Type typeOfT, JsonDeserializationContext context)
            throws JsonParseException {
        Calendar cal = Calendar.getInstance();
        String calString = json.getAsString();
        calString = fixTZ(calString);
        try {
            cal.setTime(calendarFormat.parse(calString));
        } catch (ParseException e) {
            throw new JsonParseException("Unparseable date " + calString, e);
        }
        return cal;
    }

    private String fixTZ(String calString) {
        if (calString.endsWith("Z")) {
            return calString.substring(0, calString.length() - 1) + "+0000";
        }

        Matcher tzMatch = ASSEMBLA_TZ_PATTERN.matcher(calString);
        if (tzMatch.find()) {
            return calString.substring(0, tzMatch.start(1)) + tzMatch.group(1).replaceFirst(":", "");
        }

        tzMatch = DATEFMT_TZ_PATTERN.matcher(calString);
        if (!tzMatch.find()) {
            return calString + "+0000";
        }

        return calString;
    }

    @Override
    public JsonElement serialize(Calendar src, Type typeOfSrc, JsonSerializationContext context) {
        return new JsonPrimitive(calendarFormat.format(src.getTime()));
    }
}