/*
* 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 com.hp.hpl.jena.sparql.function.library;
import com.hp.hpl.jena.datatypes.xsd.XSDDatatype ;
import com.hp.hpl.jena.sparql.expr.ExprEvalException ;
import com.hp.hpl.jena.sparql.expr.NodeValue ;
import com.hp.hpl.jena.sparql.function.FunctionBase1 ;
import org.apache.jena.atlas.logging.Log ;
/** date(expression) => XSD dateTime
* Attempt to convert an expression to an XSD dateTime.
* Supported conversions: Date as yyyy-mm-dd
*/
public class date extends FunctionBase1
{
public date() { }
@Override
public NodeValue exec(NodeValue v)
{
if ( ! v.isString() )
{
Log.warn(this, "date: argument not a string: "+v) ;
throw new ExprEvalException("date: argument not a string: "+v) ;
}
String lexicalForm = v.getString() ;
// Quite picky about format
if ( ! lexicalForm.matches("\\d{4}-\\d{2}-\\d{2}") )
{
Log.warn(this, "date: argument not in date format: "+v) ;
throw new ExprEvalException("date: argument not in date format: "+v) ;
}
lexicalForm=lexicalForm+"T00:00:00Z" ;
NodeValue nv = NodeValue.makeNode(lexicalForm, XSDDatatype.XSDdateTime) ;
return nv ;
}
}