/**
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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 org.apache.marmotta.platform.sparql.services.sparqlio.sparqljson;
import org.openrdf.query.resultio.BooleanQueryResultFormat;
import org.openrdf.query.resultio.BooleanQueryResultWriter;
import java.io.IOException;
import java.io.OutputStream;
import java.io.OutputStreamWriter;
import java.io.PrintWriter;
import java.nio.charset.Charset;
/**
* Add file description here!
* <p/>
* User: sschaffe
*/
public class SPARQLBooleanJSONWriter implements BooleanQueryResultWriter {
private OutputStream out;
public SPARQLBooleanJSONWriter(OutputStream out) {
this.out = out;
}
/**
* Gets the query result format that this writer uses.
*/
@Override
public BooleanQueryResultFormat getBooleanQueryResultFormat() {
return new BooleanQueryResultFormat("SPARQL/JSON",
"application/sparql-results+json", Charset.forName("UTF-8"), "srj");
}
/**
* Writes the specified boolean value.
*/
@Override
public void write(boolean value) throws IOException {
PrintWriter writer = new PrintWriter(new OutputStreamWriter(out));
writer.println("{ \"head\": {}, \"boolean\": \""+value+"\" }");
writer.flush();
writer.close();
}
}