/*
* 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.cocoon.forms.datatype.validationruleimpl;
import org.apache.cocoon.forms.datatype.ValidationRule;
import org.apache.cocoon.forms.util.DomHelper;
import org.apache.oro.text.regex.Perl5Compiler;
import org.apache.oro.text.regex.Pattern;
import org.apache.oro.text.regex.MalformedPatternException;
import org.w3c.dom.Element;
/**
* Builds {@link RegExpValidationRule}s.
*
* @version $Id$
*/
public class RegExpValidationRuleBuilder extends AbstractValidationRuleBuilder {
public ValidationRule build(Element validationRuleElement) throws Exception {
RegExpValidationRule rule = new RegExpValidationRule();
String regexp = DomHelper.getAttribute(validationRuleElement, "pattern");
buildFailMessage(validationRuleElement, rule);
Perl5Compiler compiler = new Perl5Compiler();
Pattern pattern;
try {
pattern = compiler.compile(regexp, Perl5Compiler.READ_ONLY_MASK);
} catch (MalformedPatternException e) {
throw new Exception("Invalid regular expression at " + DomHelper.getLocation(validationRuleElement) + ": " + e.getMessage());
}
rule.setPattern(regexp, pattern);
buildFailMessage(validationRuleElement, rule);
return rule;
}
}