com.sun.faces.taglib.jsf_core.RegexValidatorTag Maven / Gradle / Ivy
/*
* Copyright (c) 1997, 2018 Oracle and/or its affiliates. All rights reserved.
*
* This program and the accompanying materials are made available under the
* terms of the Eclipse Public License v. 2.0, which is available at
* http://www.eclipse.org/legal/epl-2.0.
*
* This Source Code may also be made available under the following Secondary
* Licenses when the conditions for such availability set forth in the
* Eclipse Public License v. 2.0 are satisfied: GNU General Public License,
* version 2 with the GNU Classpath Exception, which is available at
* https://www.gnu.org/software/classpath/license.html.
*
* SPDX-License-Identifier: EPL-2.0 OR GPL-2.0 WITH Classpath-exception-2.0
*/
package com.sun.faces.taglib.jsf_core;
import javax.faces.validator.RegexValidator;
import javax.faces.context.FacesContext;
import javax.faces.validator.Validator;
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 static final long serialVersionUID = 5353063400995625645L;
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;
}
}