/*
* 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.jena.sparql.function.library;
// Contribution from Leigh Dodds
import org.apache.jena.sparql.expr.E_SHA1 ;
import org.apache.jena.sparql.expr.NodeValue ;
import org.apache.jena.sparql.expr.nodevalue.NodeFunctions ;
import org.apache.jena.sparql.function.FunctionBase1 ;
/**
* ARQ Extension Function that will calculate the
* SHA1 sum of any literal. Useful for working with
* FOAF data.
*/
public class sha1sum extends FunctionBase1
{
// This exists for compatibility.
// SPARQL 1.1 has a SHA1(expression) function.
// This stub implements afn:sha1(expr) as an indirection to that function.
private E_SHA1 sha1 = new E_SHA1(null) ;
public sha1sum() {}
@Override
public NodeValue exec(NodeValue nodeValue)
{
nodeValue = NodeFunctions.str(nodeValue) ;
return sha1.eval(nodeValue) ;
}
}