/*
* 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.forms.datatype.validationruleimpl;
import org.apache.cocoon.forms.Constants;
import org.apache.cocoon.forms.util.I18nMessage;
import org.apache.cocoon.forms.validation.ValidationError;
import org.apache.oro.text.regex.Pattern;
import org.apache.oro.text.regex.PatternMatcher;
import org.apache.oro.text.regex.Perl5Matcher;
import org.outerj.expression.ExpressionContext;
/**
* Checks that a String matches a regular expression.
*
* <p>The <a href="http://jakarta.apache.org/oro/">Jakarta ORO</a> library
* is used as regexp engine.
*
* @version $Id: RegExpValidationRule.java,v 1.2 2004/03/09 14:58:45 cziegeler Exp $
*/
public class RegExpValidationRule extends AbstractValidationRule {
/** Compiled regular expression. */
private Pattern pattern;
/** Original string representation of the regexp, used for informational purposes only. */
private String regexp;
public ValidationError validate(Object value, ExpressionContext expressionContext) {
String string = (String)value;
if(matchesRegExp(string))
return null;
else
return hasFailMessage() ? getFailMessage() : new ValidationError(new I18nMessage("validation.string.regexp", new String[] {regexp}, Constants.I18N_CATALOGUE));
}
private boolean matchesRegExp(String string) {
PatternMatcher matcher = new Perl5Matcher();
return matcher.matches(string, pattern);
}
void setPattern(String regexp, Pattern pattern) {
this.regexp = regexp;
this.pattern = pattern;
}
public boolean supportsType(Class clazz, boolean arrayType) {
return clazz.isAssignableFrom(String.class) && !arrayType;
}
}