org.kiji.rest.serializers.SchemaOptionToJson.java Source code

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Here is the source code for org.kiji.rest.serializers.SchemaOptionToJson.java

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/**
 * (c) Copyright 2013 WibiData, Inc.
 *
 * See the NOTICE file distributed with this work for additional
 * information regarding copyright ownership.
 *
 * 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 org.kiji.rest.serializers;

import java.io.IOException;

import com.fasterxml.jackson.core.JsonGenerator;
import com.fasterxml.jackson.databind.JsonNode;
import com.fasterxml.jackson.databind.JsonSerializer;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.databind.SerializerProvider;

import org.apache.avro.AvroRuntimeException;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import org.kiji.rest.representations.SchemaOption;

/**
 * Converts the SchemaOption to JSON.
 *
 */
public class SchemaOptionToJson extends JsonSerializer<SchemaOption> {

    private static final Logger LOG = LoggerFactory.getLogger(SchemaOptionToJson.class);
    private ObjectMapper mMapper = new ObjectMapper();

    /**
     * {@inheritDoc}
     */
    @Override
    public void serialize(SchemaOption record, JsonGenerator generator, SerializerProvider provider)
            throws IOException {
        try {
            JsonNode node = mMapper.readTree(record.getOptionValue().toString());
            generator.writeTree(node); // Ensures that we can write actual JSON not a string escaped JSON
        } catch (AvroRuntimeException are) {
            LOG.error("Error writing Avro record ", are);
            throw are;
        }
    }

    /**
     * {@inheritDoc}
     */
    @Override
    public Class<SchemaOption> handledType() {
        return SchemaOption.class;
    }
}