public class EmailValidator
extends java.lang.Object
Perform email validations.
This class is a Singleton; you can retrieve the instance via the getInstance() method.
Based on a script by Sandeep V. Tamhankar http://javascript.internet.com
This implementation is not guaranteed to catch all possible errors in an email address. For example, an address like nobody@noplace.somedog will pass validator, even though there is no TLD "somedog"
.Modifier and Type | Field and Description |
---|---|
private static java.lang.String |
ATOM |
private static java.lang.String |
ATOM_PATTERN |
private static java.lang.String |
DOMAIN_PATTERN |
private static java.lang.String |
EMAIL_PATTERN |
private static EmailValidator |
instance
Singleton instance of this class.
|
private static java.lang.String |
IP_DOMAIN_PATTERN |
private static java.lang.String |
LEGAL_ASCII_PATTERN |
private static java.lang.String |
QUOTED_USER |
private static java.lang.String |
SPECIAL_CHARS |
private static java.lang.String |
TLD_PATTERN |
private static java.lang.String |
USER_PATTERN |
private static java.lang.String |
VALID_CHARS |
private static java.lang.String |
WORD |
Modifier | Constructor and Description |
---|---|
protected |
EmailValidator()
Protected constructor for subclasses to use.
|
Modifier and Type | Method and Description |
---|---|
static EmailValidator |
getInstance()
Returns the Singleton instance of this validator.
|
boolean |
isValid(java.lang.String email)
Checks if a field has a valid e-mail address.
|
protected boolean |
isValidDomain(java.lang.String domain)
Returns true if the domain component of an email address is valid.
|
protected boolean |
isValidIpAddress(Perl5Util ipAddressMatcher)
Validates an IP address.
|
protected boolean |
isValidSymbolicDomain(java.lang.String domain)
Validates a symbolic domain name.
|
protected boolean |
isValidUser(java.lang.String user)
Returns true if the user component of an email address is valid.
|
protected java.lang.String |
stripComments(java.lang.String emailStr)
Recursively remove comments, and replace with a single space.
|
private static final java.lang.String SPECIAL_CHARS
private static final java.lang.String VALID_CHARS
private static final java.lang.String QUOTED_USER
private static final java.lang.String ATOM
private static final java.lang.String WORD
private static final java.lang.String LEGAL_ASCII_PATTERN
private static final java.lang.String EMAIL_PATTERN
private static final java.lang.String IP_DOMAIN_PATTERN
private static final java.lang.String TLD_PATTERN
private static final java.lang.String USER_PATTERN
private static final java.lang.String DOMAIN_PATTERN
private static final java.lang.String ATOM_PATTERN
private static final EmailValidator instance
protected EmailValidator()
public static EmailValidator getInstance()
public boolean isValid(java.lang.String email)
Checks if a field has a valid e-mail address.
email
- The value validation is being performed on. A null
value is considered invalid.protected boolean isValidDomain(java.lang.String domain)
domain
- being validatied.protected boolean isValidUser(java.lang.String user)
user
- being validatedprotected boolean isValidIpAddress(Perl5Util ipAddressMatcher)
ipAddressMatcher
- Pattren matcherprotected boolean isValidSymbolicDomain(java.lang.String domain)
domain
- symbolic domain nameprotected java.lang.String stripComments(java.lang.String emailStr)
emailStr
- The email addressCopyright (c) 2001-2004 Apache Software Foundation