co.cask.cdap.internal.app.ProcedureSpecificationCodec.java Source code

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Here is the source code for co.cask.cdap.internal.app.ProcedureSpecificationCodec.java

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/*
 * Copyright  2014 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;

import co.cask.cdap.api.ResourceSpecification;
import co.cask.cdap.api.procedure.ProcedureSpecification;
import co.cask.cdap.internal.procedure.DefaultProcedureSpecification;
import com.google.common.reflect.TypeToken;
import com.google.gson.JsonDeserializationContext;
import com.google.gson.JsonElement;
import com.google.gson.JsonObject;
import com.google.gson.JsonParseException;
import com.google.gson.JsonPrimitive;
import com.google.gson.JsonSerializationContext;

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

/**
 *
 */
final class ProcedureSpecificationCodec extends AbstractSpecificationCodec<ProcedureSpecification> {

    @Override
    public JsonElement serialize(ProcedureSpecification src, Type typeOfSrc, JsonSerializationContext context) {
        JsonObject jsonObj = new JsonObject();

        jsonObj.add("className", new JsonPrimitive(src.getClassName()));
        jsonObj.add("name", new JsonPrimitive(src.getName()));
        jsonObj.add("description", new JsonPrimitive(src.getDescription()));
        jsonObj.add("datasets", serializeSet(src.getDataSets(), context, String.class));
        jsonObj.add("properties", serializeMap(src.getProperties(), context, String.class));
        jsonObj.add("resources", context.serialize(src.getResources(), new TypeToken<ResourceSpecification>() {
        }.getType()));
        jsonObj.addProperty("instances", src.getInstances());
        return jsonObj;
    }

    @Override
    public ProcedureSpecification deserialize(JsonElement json, Type typeOfT, JsonDeserializationContext context)
            throws JsonParseException {
        JsonObject jsonObj = json.getAsJsonObject();

        String className = jsonObj.get("className").getAsString();
        String name = jsonObj.get("name").getAsString();
        String description = jsonObj.get("description").getAsString();
        Set<String> dataSets = deserializeSet(jsonObj.get("datasets"), context, String.class);
        Map<String, String> properties = deserializeMap(jsonObj.get("properties"), context, String.class);
        ResourceSpecification resourceSpec = context.deserialize(jsonObj.get("resources"),
                new TypeToken<ResourceSpecification>() {
                }.getType());

        JsonElement instanceElem = jsonObj.get("instances");
        int instances = (instanceElem == null || instanceElem.isJsonNull()) ? 1
                : jsonObj.get("instances").getAsInt();
        return new DefaultProcedureSpecification(className, name, description, dataSets, properties, resourceSpec,
                instances);
    }
}