org.cmg.jresp.json.GroupPredicateSerializer.java Source code

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Here is the source code for org.cmg.jresp.json.GroupPredicateSerializer.java

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/**
 * Copyright (c) 2013 Concurrency and Mobility Group.
 * Universita' di Firenze
 *   
 * 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:
 *      Michele Loreti
 */
package org.cmg.jresp.json;

import java.lang.reflect.Type;

import org.cmg.jresp.topology.And;
import org.cmg.jresp.topology.GroupPredicate;
import org.cmg.jresp.topology.HasValue;
import org.cmg.jresp.topology.IsGreaterOrEqualThan;
import org.cmg.jresp.topology.IsGreaterThan;
import org.cmg.jresp.topology.IsLessOrEqualThan;
import org.cmg.jresp.topology.IsLessThan;
import org.cmg.jresp.topology.Not;
import org.cmg.jresp.topology.Or;

import com.google.gson.JsonElement;
import com.google.gson.JsonObject;
import com.google.gson.JsonSerializationContext;
import com.google.gson.JsonSerializer;

/**
 * @author Michele Loreti
 *
 */
public class GroupPredicateSerializer implements JsonSerializer<GroupPredicate> {

    @Override
    public JsonElement serialize(GroupPredicate src, Type typeOfSrc, JsonSerializationContext context) {
        GroupPredicate.PredicateType gType = src.getType();
        JsonObject json = new JsonObject();
        json.add("type", context.serialize(gType, GroupPredicate.PredicateType.class));
        switch (gType) {
        case TRUE:
            return json;
        case ISEQUAL:
            return doSerializeHasValuePredicate((HasValue) src, json, context);
        case ISGTR:
            return doSerializeIsGreaterThanPredicate((IsGreaterThan) src, json, context);
        case ISGEQ:
            return doSerializeIsGreaterOrEqualThanPredicate((IsGreaterOrEqualThan) src, json, context);
        case ISLEQ:
            return doSerializeIsLessOrEqualThanPredicate((IsLessOrEqualThan) src, json, context);
        case ISLES:
            return doSerializeIsLessThanPredicate((IsLessThan) src, json, context);
        case AND:
            return doSerializeAndPredicate((And) src, json, context);
        case OR:
            return doSerializeOrPredicate((Or) src, json, context);
        case NOT:
            return doSerializeNotPredicate((Not) src, json, context);
        }
        return json;
    }

    private JsonElement doSerializeNotPredicate(Not src, JsonObject json, JsonSerializationContext context) {
        json.add("arg", context.serialize(src.getArgument(), GroupPredicate.class));
        return json;
    }

    private JsonElement doSerializeAndPredicate(And src, JsonObject json, JsonSerializationContext context) {
        json.add("left", context.serialize(src.getLeft(), GroupPredicate.class));
        json.add("right", context.serialize(src.getRight(), GroupPredicate.class));
        return json;
    }

    private JsonElement doSerializeOrPredicate(Or src, JsonObject json, JsonSerializationContext context) {
        json.add("left", context.serialize(src.getLeft(), GroupPredicate.class));
        json.add("right", context.serialize(src.getRight(), GroupPredicate.class));
        return json;
    }

    private JsonElement doSerializeIsGreaterOrEqualThanPredicate(IsGreaterOrEqualThan src, JsonObject json,
            JsonSerializationContext context) {
        json.addProperty("attribute", src.getAttribute());
        json.add("value", SCELJsonUtil.jsonFromObject(src.getValue(), context));
        return json;
    }

    private JsonElement doSerializeIsGreaterThanPredicate(IsGreaterThan src, JsonObject json,
            JsonSerializationContext context) {
        json.addProperty("attribute", src.getAttribute());
        json.add("value", SCELJsonUtil.jsonFromObject(src.getValue(), context));
        return json;
    }

    private JsonElement doSerializeIsLessThanPredicate(IsLessThan src, JsonObject json,
            JsonSerializationContext context) {
        json.addProperty("attribute", src.getAttribute());
        json.add("value", SCELJsonUtil.jsonFromObject(src.getValue(), context));
        return json;
    }

    private JsonElement doSerializeIsLessOrEqualThanPredicate(IsLessOrEqualThan src, JsonObject json,
            JsonSerializationContext context) {
        json.addProperty("attribute", src.getAttribute());
        json.add("value", SCELJsonUtil.jsonFromObject(src.getValue(), context));
        return json;
    }

    private JsonElement doSerializeHasValuePredicate(HasValue src, JsonObject json,
            JsonSerializationContext context) {
        json.addProperty("attribute", src.getAttribute());
        json.add("value", SCELJsonUtil.jsonFromObject(src.getValue(), context));
        return json;
    }
}