/*
* Copyright 1999-2004 The Apache Software Foundation.
*
* Licensed 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.woody.datatype.validationruleimpl;
import org.apache.cocoon.woody.datatype.ValidationRule;
import org.apache.cocoon.woody.datatype.validationruleimpl.AbstractValidationRuleBuilder;
import org.apache.cocoon.woody.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: RegExpValidationRuleBuilder.java,v 1.6 2004/03/09 13:53:47 reinhard Exp $
*/
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 = null;
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;
}
}