/*
 * Copyright (c) nosqlbench
 *
 * 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 io.nosqlbench.virtdata.predicates;

import com.google.gson.Gson;
import com.google.gson.GsonBuilder;
import com.google.gson.reflect.TypeToken;
import io.nosqlbench.nb.annotations.Service;
import io.nosqlbench.virtdata.predicates.ast.PredicateExpr;
import io.nosqlbench.virtdata.predicates.ast.PredicateExprDefaultImpl;
import io.nosqlbench.virtdata.predicates.types.PredicateSerDes;

@Service(value=PredicateSerDes.class,selector = "json-serdes")
public class JsonPredicateSerDes implements PredicateSerDes {
    private final static Gson gson = new GsonBuilder().setPrettyPrinting().create();
    private final static TypeToken<PredicateExprDefaultImpl> pexprType = TypeToken.get(PredicateExprDefaultImpl.class);

    @Override
    public PredicateExpr unserialize(String predicateData) {
        PredicateExpr expr = gson.fromJson(predicateData, pexprType);
        return expr;
    }

    @Override
    public String serialize(PredicateExpr predicateExpr) {
        return gson.toJson(predicateExpr);
    }
}
