org.apache.bval.routines.EMailValidationUtils Maven / Gradle / Ivy
/*
* 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.bval.routines;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
/**
* Description: holds the regexp to validate an email address
* User: roman.stumm
* Date: 17.06.2010
* Time: 10:40:59
*/
public class EMailValidationUtils {
private static String ATOM = "[^\\x00-\\x1F^\\(^\\)^\\<^\\>^\\@^\\,^\\;^\\:^\\\\^\\\"^\\.^\\[^\\]^\\s]";
private static String DOMAIN = "(" + ATOM + "+(\\." + ATOM + "+)*";
private static String IP_DOMAIN = "\\[[0-9]{1,3}\\.[0-9]{1,3}\\.[0-9]{1,3}\\.[0-9]{1,3}\\]";
public static final java.util.regex.Pattern DEFAULT_EMAIL_PATTERN;
static {
DEFAULT_EMAIL_PATTERN =
java.util.regex.Pattern.compile("^" + ATOM + "+(\\." + ATOM + "+)*@" + DOMAIN + "|" + IP_DOMAIN + ")$",
java.util.regex.Pattern.CASE_INSENSITIVE);
}
/**
* Learn whether a given object is a valid email address.
*
* @param value
* to check
* @return true if the validation passes
*/
public static boolean isValid(Object value) {
return isValid(value, DEFAULT_EMAIL_PATTERN);
}
/**
* Learn whether a particular value matches a given pattern per
* {@link Matcher#matches()}.
*
* @param value
* @param aPattern
* @return true if value was a String
* matching aPattern
*/
// TODO it would seem to make sense to move or reduce the visibility of this
// method as it is more general than email.
public static boolean isValid(Object value, Pattern aPattern) {
if (value == null)
return true;
if (!(value instanceof CharSequence))
return false;
CharSequence seq = (CharSequence) value;
if (seq.length() == 0)
return true;
Matcher m = aPattern.matcher(seq);
return m.matches();
}
}