hu.bme.mit.incqueryd.engine.test.util.TupleDeserializer.java Source code

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/*******************************************************************************
 * Copyright (c) 2010-2014, Gabor Szarnyas, Istvan Rath and Daniel Varro
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:
 * Gabor Szarnyas - initial API and implementation
 *******************************************************************************/

package hu.bme.mit.incqueryd.engine.test.util;

import hu.bme.mit.incqueryd.engine.rete.dataunits.Tuple;

import java.lang.reflect.Type;
import java.util.ArrayList;

import com.google.gson.JsonArray;
import com.google.gson.JsonDeserializationContext;
import com.google.gson.JsonDeserializer;
import com.google.gson.JsonElement;
import com.google.gson.JsonObject;
import com.google.gson.JsonParseException;
import com.google.gson.JsonPrimitive;

public class TupleDeserializer implements JsonDeserializer<Tuple> {

    @Override
    public Tuple deserialize(JsonElement json, Type typeOfT, JsonDeserializationContext context)
            throws JsonParseException {

        JsonObject jsonObject = json.getAsJsonObject();
        JsonArray array = jsonObject.getAsJsonArray("tuple");

        ArrayList<Object> list = new ArrayList<Object>();

        for (Object object : array) {
            // checking if the object is a primitive
            if (object instanceof JsonPrimitive) {
                JsonPrimitive primitive = (JsonPrimitive) object;

                // if it is a number, get it as a long
                if (primitive.isNumber()) {
                    long i = primitive.getAsLong();
                    list.add(i);
                }
            }
        }

        Tuple tuple = new Tuple(list.toArray());
        return tuple;
    }

}