/*
* $Id: RegexValidatorTag.java,v 1.2 2008/04/01 22:31:22 driscoll Exp $
*/
/*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
*
* Copyright 1997-2007 Sun Microsystems, Inc. All rights reserved.
*
* The contents of this file are subject to the terms of either the GNU
* General Public License Version 2 only ("GPL") or the Common Development
* and Distribution License("CDDL") (collectively, the "License"). You
* may not use this file except in compliance with the License. You can obtain
* a copy of the License at https://glassfish.dev.java.net/public/CDDL+GPL.html
* or glassfish/bootstrap/legal/LICENSE.txt. See the License for the specific
* language governing permissions and limitations under the License.
*
* When distributing the software, include this License Header Notice in each
* file and include the License file at glassfish/bootstrap/legal/LICENSE.txt.
* Sun designates this particular file as subject to the "Classpath" exception
* as provided by Sun in the GPL Version 2 section of the License file that
* accompanied this code. If applicable, add the following below the License
* Header, with the fields enclosed by brackets [] replaced by your own
* identifying information: "Portions Copyrighted [year]
* [name of copyright owner]"
*
* Contributor(s):
*
* If you wish your version of this file to be governed by only the CDDL or
* only the GPL Version 2, indicate your decision by adding "[Contributor]
* elects to include this software in this distribution under the [CDDL or GPL
* Version 2] license." If you don't indicate a single choice of license, a
* recipient has the option to distribute your version of this file under
* either the CDDL, the GPL Version 2 or to extend the choice of license to
* its licensees as provided above. However, if you add GPL Version 2 code
* and therefore, elected the GPL Version 2 license, then the option applies
* only if the new code is made subject to such option by the copyright
* holder.
*/
package com.sun.faces.taglib.jsf_core;
import javax.faces.validator.RegexValidator;
import javax.faces.application.Application;
import javax.faces.context.FacesContext;
import javax.faces.validator.Validator;
import javax.faces.webapp.ValidatorELTag;
import javax.el.ValueExpression;
import javax.el.ExpressionFactory;
import javax.servlet.jsp.JspException;
/**
* Tag for the Regular Expression Validator. Can accept a regex pattern as a
* property - this will be used to validate against.
* @author driscoll
*/
public class RegexValidatorTag extends AbstractValidatorTag {
private ValueExpression regex;
private ValueExpression VALIDATOR_ID_EXPR;
// ------------------------------------------------------------ Constructors
public RegexValidatorTag() {
if (VALIDATOR_ID_EXPR == null) {
FacesContext context = FacesContext.getCurrentInstance();
ExpressionFactory factory =
context.getApplication().getExpressionFactory();
VALIDATOR_ID_EXPR =
factory.createValueExpression(context.getELContext(),
"javax.faces.RegularExpression",String.class);
}
}
/**
* Set the Regular Expression to use for validation.
* @param pattern A regular expression - needs to be escaped, @see java.util.regex .
*/
public void setPattern(ValueExpression pattern) {
this.regex = pattern;
}
@Override
protected Validator createValidator() throws JspException {
super.setValidatorId(VALIDATOR_ID_EXPR);
RegexValidator validator = (RegexValidator) super.createValidator();
assert (validator != null);
if (regex != null) {
FacesContext ctx = FacesContext.getCurrentInstance();
validator.setPattern((String) regex.getValue(ctx.getELContext()));
}
return validator;
}
}