/*
* 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;
import org.apache.jena.atlas.lib.Lib;
import org.apache.jena.query.QueryBuildException;
import org.apache.jena.sparql.expr.ExprEvalException;
import org.apache.jena.sparql.expr.ExprList;
import org.apache.jena.sparql.expr.NodeValue;
import org.apache.jena.sparql.expr.nodevalue.XSDFuncOp;
import org.apache.jena.sparql.function.FunctionBase;
import java.util.List;
public class FN_Round_Half_Even extends FunctionBase
{
public FN_Round_Half_Even() { super() ; }
@Override
public void checkBuild(String uri, ExprList args)
{
if ( args.size() != 1 && args.size() != 2 )
throw new QueryBuildException("Function '"+ Lib.className(this)+"' takes one or two arguments") ;
}
@Override
public NodeValue exec(List<NodeValue> args)
{
if ( args.size() > 2 )
throw new ExprEvalException("FN_Round_Half_Even: Wrong number of arguments: "+
args.size()+" : [wanted 1 or 2]") ;
NodeValue v1 = args.get(0) ;
if ( args.size() == 2 )
{
NodeValue v2 = args.get(1) ;
return XSDFuncOp.roundXpath3(v1, v2,true) ;
}
return XSDFuncOp.roundXpath3(v1, NodeValue.makeInteger(0),true) ;
}
}