arces.unibo.SEPA.commons.response.Notification.java Source code

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Here is the source code for arces.unibo.SEPA.commons.response.Notification.java

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/* This class represents a SEPA notification
 * 
 * Author: Luca Roffia (luca.roffia@unibo.it)
    
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
    
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.
    
You should have received a copy of the GNU General Public License
along with this program.  If not, see <http://www.gnu.org/licenses/>.
*/
package arces.unibo.SEPA.commons.response;

import com.google.gson.JsonObject;
import com.google.gson.JsonPrimitive;

import arces.unibo.SEPA.commons.SPARQL.ARBindingsResults;

/**
 * This class represents a SPARQL Notification (see SPARQL 1.1 Subscription Language)
 *
 * The JSON serialization looks like:
 *
 * {
 *       "spuid" : "SPUID" , 
 *       "sequence" : "SEQUENTIAL NUMBER", 
 *       "results" : <JSON Notification Results>
 * }
 * 
* @author Luca Roffia (luca.roffia@unibo.it)
* @version 0.1
* */

public class Notification extends Response {

    public Notification(String spuid, ARBindingsResults results, Integer sequence) {
        super();

        if (results != null)
            json.add("results", results.toJson());
        if (spuid != null)
            json.add("spuid", new JsonPrimitive(spuid));
        json.add("sequence", new JsonPrimitive(sequence));
    }

    public Notification(JsonObject notify) {
        super();

        json = notify;
    }

    public String getSPUID() {
        if (json.get("spuid") != null)
            return json.get("spuid").getAsString();
        return "";
    }

    public ARBindingsResults getARBindingsResults() {
        if (json.getAsJsonObject("results") != null)
            return new ARBindingsResults(json.getAsJsonObject("results"));
        return null;
    }

    public Integer getSequence() {
        return json.get("sequence").getAsInt();
    }

    public boolean toBeNotified() {
        return json.get("results") != null;
    }
}