com.wealdtech.jackson.modules.IntervalSerializer.java Source code

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Here is the source code for com.wealdtech.jackson.modules.IntervalSerializer.java

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/*
 * Copyright 2012 - 2014 Weald Technology Trading Limited
 *
 * 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 com.wealdtech.jackson.modules;

import com.fasterxml.jackson.core.JsonGenerator;
import com.fasterxml.jackson.core.JsonProcessingException;
import com.fasterxml.jackson.databind.SerializerProvider;
import com.fasterxml.jackson.databind.jsontype.TypeSerializer;
import com.fasterxml.jackson.databind.ser.std.StdSerializer;
import org.joda.time.Interval;
import org.joda.time.format.DateTimeFormat;
import org.joda.time.format.DateTimeFormatter;

import java.io.IOException;

/**
 * Custom serializer for Joda Interval objects.
 * This serializer presents Joda Interval objects as complex objects.
 * It provides a 'startdatetime' field which provides the DateTime in ISO 8601
 * format and also provides a 'starttimezone' field which provides the timezone
 * of the DateTime in such a format that the entire DateTime can be recreated
 * with no loss of information.  Similar fields are provided for 'enddatetime'
 * and 'endtimezone', resulting in a complete interval.
 */
public class IntervalSerializer extends StdSerializer<Interval> {
    private static DateTimeFormatter formatter = DateTimeFormat.forPattern("yyyy-MM-dd'T'HH:mm:ssZZ ZZZ");

    public IntervalSerializer() {
        super(Interval.class, true);
    }

    @Override
    public void serialize(final Interval value, final JsonGenerator gen, final SerializerProvider provider)
            throws IOException {
        gen.writeStartObject();
        gen.writeStringField("startdatetime", formatter.print(value.getStart()));
        gen.writeStringField("starttimezone", value.getStart().getZone().toString());
        gen.writeStringField("enddatetime", formatter.print(value.getEnd()));
        gen.writeStringField("endtimezone", value.getEnd().getZone().toString());
        gen.writeEndObject();
    }

    @Override
    public void serializeWithType(final Interval value, JsonGenerator jgen, SerializerProvider provider,
            TypeSerializer typeSer) throws IOException, JsonProcessingException {
        typeSer.writeTypePrefixForScalar(value, jgen, Interval.class);
        serialize(value, jgen, provider);
        typeSer.writeTypeSuffixForScalar(value, jgen);
    }
}