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

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Here is the source code for co.cask.cdap.internal.app.FlowSpecificationCodec.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.flow.FlowSpecification;
import co.cask.cdap.api.flow.FlowletConnection;
import co.cask.cdap.api.flow.FlowletDefinition;
import co.cask.cdap.internal.flow.DefaultFlowSpecification;
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.List;
import java.util.Map;

/**
 *
 */
final class FlowSpecificationCodec extends AbstractSpecificationCodec<FlowSpecification> {

    @Override
    public JsonElement serialize(FlowSpecification 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("flowlets", serializeMap(src.getFlowlets(), context, FlowletDefinition.class));
        jsonObj.add("connections", serializeList(src.getConnections(), context, FlowletConnection.class));

        return jsonObj;
    }

    @Override
    public FlowSpecification 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();
        Map<String, FlowletDefinition> flowlets = deserializeMap(jsonObj.get("flowlets"), context,
                FlowletDefinition.class);
        List<FlowletConnection> connections = deserializeList(jsonObj.get("connections"), context,
                FlowletConnection.class);

        return new DefaultFlowSpecification(className, name, description, flowlets, connections);
    }
}