// Copyright 2008 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.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 java.util.regex.Pattern;
/**
* A validator that checks if a given string is well-formed email address. This validator is not configurable.
*/
public class Email extends AbstractValidator<Void, String>
{
private static final String ATOM = "[^\\x00-\\x1F^\\(^\\)^\\<^\\>^\\@^\\,^\\;^\\:^\\\\^\\\"^\\.^\\[^\\]^\\s]";
private static final String DOMAIN = "(" + ATOM + "+(\\." + ATOM + "+)*";
private static final String IP_DOMAIN = "\\[[0-9]{1,3}\\.[0-9]{1,3}\\.[0-9]{1,3}\\.[0-9]{1,3}\\]";
private static final Pattern PATTERN = Pattern
.compile("^" + ATOM + "+(\\." + ATOM + "+)*@" + DOMAIN + "|" + IP_DOMAIN + ")$", Pattern.CASE_INSENSITIVE);
public Email()
{
super(null, String.class, "invalid-email");
}
public void render(Field field, Void constraintValue, MessageFormatter formatter, MarkupWriter markupWriter,
FormSupport formSupport)
{
formSupport.addValidation(field, "email", buildMessage(formatter, field), null);
}
private String buildMessage(MessageFormatter formatter, Field field)
{
return formatter.format(field.getLabel());
}
public void validate(Field field, Void constraintValue, MessageFormatter formatter, String value)
throws ValidationException
{
if (!PATTERN.matcher(value).matches()) throw new ValidationException(buildMessage(formatter, field));
}
}