/*
* 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.expr;
import org.apache.xerces.impl.xpath.regex.ParseException ;
import org.apache.xerces.impl.xpath.regex.RegularExpression ;
public class RegexXerces implements RegexEngine
{
RegularExpression regexPattern ;
public RegexXerces(String pattern, String flags)
{
regexPattern = makePattern(pattern, flags) ;
}
@Override
public boolean match(String s)
{
return regexPattern.matches(s) ;
}
private RegularExpression makePattern(String patternStr, String flags)
{
// Input : only m s i x
// Check/modify flags.
// Always "u", never patternStr
//x: Remove whitespace characters (#x9, #xA, #xD and #x20) unless in [] classes
try { return new RegularExpression(patternStr, flags) ; }
catch (ParseException pEx)
{ throw new ExprException("Regex: Pattern exception: "+pEx) ; }
}
}