/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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.woody.datatype.validationruleimpl;
import org.apache.cocoon.woody.datatype.ValidationError;
import org.apache.cocoon.woody.util.I18nMessage;
import org.apache.cocoon.woody.Constants;
import org.outerj.expression.ExpressionContext;
/**
* ValidationRule that checks that a string is an email address.
*
* @version $Id: EmailValidationRule.java 433543 2006-08-22 06:22:54Z crossley $
*/
public class EmailValidationRule extends AbstractValidationRule {
public ValidationError validate(Object value, ExpressionContext expressionContext) {
String email = (String)value;
if (isEmail(email))
return null;
else
return hasFailMessage() ? getFailMessage() : new ValidationError(new I18nMessage("validation.string.invalidemail", Constants.I18N_CATALOGUE));
}
public boolean supportsType(Class clazz, boolean arrayType) {
return clazz.isAssignableFrom(String.class) && !arrayType;
}
private boolean isEmail(String email) {
// TODO there's room for improvement here
// check that the email address does not contain spaces
int space = email.indexOf(' ');
if (space != -1)
return false;
// check that there is an @, and that there's at least one character before the @
int atpos = email.indexOf('@');
if (atpos < 1)
return false;
atpos++;
// check there's not second at
int anotheratpos = email.indexOf('@', atpos);
if (anotheratpos != -1)
return false;
// check there's at least one dot after the at
int dotAfterAt = email.indexOf('.', atpos);
if (dotAfterAt == -1)
return false;
return true;
}
}