org.apache.tajo.catalog.json.TableMetaAdapter.java Source code

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Here is the source code for org.apache.tajo.catalog.json.TableMetaAdapter.java

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/**
 * 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.tajo.catalog.json;

import com.google.common.base.Preconditions;
import com.google.gson.*;
import org.apache.tajo.json.CommonGsonHelper;
import org.apache.tajo.util.KeyValueSet;
import org.apache.tajo.catalog.TableMeta;
import org.apache.tajo.catalog.proto.CatalogProtos;
import org.apache.tajo.json.GsonSerDerAdapter;

import java.lang.reflect.Type;

public class TableMetaAdapter implements GsonSerDerAdapter<TableMeta> {

    @Override
    public TableMeta deserialize(JsonElement json, Type typeOfT, JsonDeserializationContext context)
            throws JsonParseException {
        Preconditions.checkNotNull(json);
        JsonObject jsonObject = json.getAsJsonObject();

        CatalogProtos.StoreType type = CatalogProtos.StoreType
                .valueOf(CommonGsonHelper.getOrDie(jsonObject, "store").getAsString());

        KeyValueSet keyValueSet = context.deserialize(CommonGsonHelper.getOrDie(jsonObject, "options"),
                KeyValueSet.class);
        return new TableMeta(type, keyValueSet);
    }

    @Override
    public JsonElement serialize(TableMeta src, Type typeOfSrc, JsonSerializationContext context) {
        JsonObject jsonObj = new JsonObject();
        jsonObj.addProperty("store", src.getStoreType().name());
        jsonObj.add("options", context.serialize(src.getOptions(), KeyValueSet.class));
        return jsonObj;
    }

}