// 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.tapestry5.validator;
import org.apache.tapestry5.Field;
import org.apache.tapestry5.MarkupWriter;
import org.apache.tapestry5.ValidationException;
import org.apache.tapestry5.ioc.MessageFormatter;
import org.apache.tapestry5.services.FormSupport;
import org.apache.tapestry5.services.javascript.DataConstants;
import org.apache.tapestry5.services.javascript.JavaScriptSupport;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
/**
* Enforces that the input matches a provided regular expression.
* <p/>
* Starting in 5.4, this always writes the pattern and title attribute, even when client validation is not enabled.
* The title attribute is used specially by modern browsers, in concert with pattern.
*/
public class Regexp extends AbstractValidator<Pattern, String>
{
public Regexp(JavaScriptSupport javaScriptSupport)
{
super(Pattern.class, String.class, "regexp", javaScriptSupport);
}
private String buildMessage(MessageFormatter formatter, Field field, Pattern constraintValue)
{
return formatter.format(constraintValue.toString(), field.getLabel());
}
public void render(Field field, Pattern constraintValue, MessageFormatter formatter, MarkupWriter writer,
FormSupport formSupport)
{
String message = buildMessage(formatter, field, constraintValue);
if (formSupport.isClientValidationEnabled())
{
javaScriptSupport.require("t5/core/validation");
writer.attributes(DataConstants.VALIDATION_ATTRIBUTE, true,
"data-validate-regexp", constraintValue.pattern(),
"data-regexp-message", message,
"pattern", constraintValue.pattern(),
"title", message);
}
}
public void validate(Field field, Pattern constraintValue, MessageFormatter formatter, String value)
throws ValidationException
{
Matcher matcher = constraintValue.matcher(value);
if (!matcher.matches()) throw new ValidationException(buildMessage(formatter, field, constraintValue));
}
}