org.apache.gobblin.runtime.spec_serde.FlowSpecSerializer.java Source code

Introduction

Here is the source code for org.apache.gobblin.runtime.spec_serde.FlowSpecSerializer.java

Source

/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You 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.apache.gobblin.runtime.spec_serde;

import java.io.IOException;
import java.io.StringWriter;
import java.lang.reflect.Type;
import java.net.URI;

import com.google.gson.JsonArray;
import com.google.gson.JsonElement;
import com.google.gson.JsonObject;
import com.google.gson.JsonParseException;
import com.google.gson.JsonSerializationContext;
import com.google.gson.JsonSerializer;
import com.typesafe.config.ConfigRenderOptions;

import org.apache.gobblin.runtime.api.FlowSpec;
import org.apache.gobblin.runtime.api.Spec;

public class FlowSpecSerializer implements JsonSerializer<FlowSpec> {
    public static final String FLOW_SPEC_URI_KEY = "uri";
    public static final String FLOW_SPEC_VERSION_KEY = "version";
    public static final String FLOW_SPEC_DESCRIPTION_KEY = "description";
    public static final String FLOW_SPEC_CONFIG_KEY = "config";
    public static final String FLOW_SPEC_CONFIG_AS_PROPERTIES_KEY = "configAsProperties";
    public static final String FLOW_SPEC_TEMPLATE_URIS_KEY = "templateURIs";
    public static final String FLOW_SPEC_CHILD_SPECS_KEY = "childSpecs";

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

        flowSpecJson.add(FLOW_SPEC_URI_KEY, context.serialize(src.getUri()));
        flowSpecJson.add(FLOW_SPEC_VERSION_KEY, context.serialize(src.getVersion()));
        flowSpecJson.add(FLOW_SPEC_DESCRIPTION_KEY, context.serialize(src.getDescription()));
        flowSpecJson.add(FLOW_SPEC_CONFIG_KEY,
                context.serialize(src.getConfig().root().render(ConfigRenderOptions.concise())));

        StringWriter writer = new StringWriter();
        try {
            src.getConfigAsProperties().store(writer, "");
        } catch (IOException e) {
            throw new JsonParseException(e);
        }
        flowSpecJson.add(FLOW_SPEC_CONFIG_AS_PROPERTIES_KEY, context.serialize(writer.getBuffer().toString()));

        JsonArray templateURIs = new JsonArray();
        if (src.getTemplateURIs().isPresent()) {
            for (URI templateURI : src.getTemplateURIs().get()) {
                templateURIs.add(context.serialize(templateURI));
            }
        }
        flowSpecJson.add(FLOW_SPEC_TEMPLATE_URIS_KEY, templateURIs);

        JsonArray childSpecs = new JsonArray();
        if (src.getChildSpecs().isPresent()) {
            for (Spec spec : src.getChildSpecs().get()) {
                childSpecs.add(context.serialize(spec));
            }
        }
        flowSpecJson.add(FLOW_SPEC_CHILD_SPECS_KEY, childSpecs);

        return flowSpecJson;
    }
}