co.cask.cdap.internal.app.runtime.codec.ArgumentsCodec.java Source code

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Here is the source code for co.cask.cdap.internal.app.runtime.codec.ArgumentsCodec.java

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/*
 * Copyright  2015 Cask Data, Inc.
 *
 * 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 co.cask.cdap.internal.app.runtime.codec;

import co.cask.cdap.app.runtime.Arguments;
import co.cask.cdap.internal.app.runtime.BasicArguments;
import com.google.common.reflect.TypeToken;
import com.google.gson.JsonDeserializationContext;
import com.google.gson.JsonDeserializer;
import com.google.gson.JsonElement;
import com.google.gson.JsonParseException;
import com.google.gson.JsonSerializationContext;
import com.google.gson.JsonSerializer;

import java.lang.reflect.Type;
import java.util.Map;

/**
 * A Gson codec for {@link Arguments}.
 */
public class ArgumentsCodec implements JsonSerializer<Arguments>, JsonDeserializer<Arguments> {

    private static final Type MAP_STRING_STRING_TYPE = new TypeToken<Map<String, String>>() {
    }.getType();

    @Override
    public Arguments deserialize(JsonElement json, Type typeOfT, JsonDeserializationContext context)
            throws JsonParseException {
        Map<String, String> args = context.deserialize(json, MAP_STRING_STRING_TYPE);
        return new BasicArguments(args);
    }

    @Override
    public JsonElement serialize(Arguments src, Type typeOfSrc, JsonSerializationContext context) {
        return context.serialize(src.asMap(), MAP_STRING_STRING_TYPE);
    }
}