arces.unibo.SEPA.commons.SPARQL.ARBindingsResults.java Source code

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Here is the source code for arces.unibo.SEPA.commons.SPARQL.ARBindingsResults.java

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/* This class represents the content of a 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.SPARQL;

import com.google.gson.JsonArray;
import com.google.gson.JsonObject;

/**
 * This class represents the content of a SEPA notification
 * 
 * It includes the added and removed bindings since the previous notification
 * 
 * @author Luca Roffia (luca.roffia@unibo.it)
 * @version 0.1
 */

public class ARBindingsResults {
    JsonObject results = new JsonObject();

    public ARBindingsResults(JsonObject results) {
        this.results = results;
    }

    public ARBindingsResults(BindingsResults added, BindingsResults removed) {
        JsonObject nullResults = new JsonObject();
        JsonArray arr = new JsonArray();
        nullResults.add("bindings", arr);

        JsonObject nullHead = new JsonObject();
        nullHead.add("vars", new JsonArray());

        JsonObject addedResults = nullResults;
        JsonObject removedResults = nullResults;
        JsonObject head = nullHead;

        if (added != null) {
            head = added.toJson().get("head").getAsJsonObject();
            addedResults = added.toJson().get("results").getAsJsonObject();
        }

        if (removed != null) {
            head = removed.toJson().get("head").getAsJsonObject();
            removedResults = removed.toJson().get("results").getAsJsonObject();
        }

        results.add("addedresults", addedResults);
        results.add("removedresults", removedResults);
        results.add("head", head);
    }

    //TODO serialized according to the SPARQL 1.1 SE Notification JSON format (TBD)
    public String toString() {
        return results.toString();
    }

    public JsonObject toJson() {
        return results;
    }

    public BindingsResults getAddedBindings() {
        JsonObject ret = new JsonObject();
        ret.add("results", results.get("addedresults"));
        ret.add("head", results.get("head"));
        return new BindingsResults(ret);
    }

    public BindingsResults getRemovedBindings() {
        JsonObject ret = new JsonObject();
        ret.add("results", results.get("removedresults"));
        ret.add("head", results.get("head"));
        return new BindingsResults(ret);
    }
}