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## org.apache.commons.validator
Class EmailValidator

    java.lang.Object
      |
      +--org.apache.commons.validator.EmailValidator

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"

.

Since:
  Validator 1.1

Constructor Summary
`protected` | `EmailValidator()` Protected constructor for subclasses to use.

Method Summary
`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(org.apache.oro.text.perl.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.

Methods inherited from class java.lang.Object
`clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

Constructor Detail

### EmailValidator

    protected EmailValidator()

  Protected constructor for subclasses to use.

Method Detail

### getInstance

    public static EmailValidator getInstance()

  Returns the Singleton instance of this validator.
  Returns:
    singleton instance of this validator.

### isValid

    public boolean isValid(java.lang.String email)

  Checks if a field has a valid e-mail address.

  Parameters:
    `email` - The value validation is being performed on. A `null` value is considered invalid.
  Returns:
    true if the email address is valid.

### isValidDomain

    protected boolean isValidDomain(java.lang.String domain)

  Returns true if the domain component of an email address is valid.
  Parameters:
    `domain` - being validatied.
  Returns:
    true if the email address's domain is valid.

### isValidUser

    protected boolean isValidUser(java.lang.String user)

  Returns true if the user component of an email address is valid.
  Parameters:
    `user` - being validated
  Returns:
    true if the user name is valid.

### isValidIpAddress

    protected boolean isValidIpAddress(org.apache.oro.text.perl.Perl5Util ipAddressMatcher)

  Validates an IP address. Returns true if valid.
  Parameters:
    `ipAddressMatcher` - Pattren matcher
  Returns:
    true if the ip address is valid.

### isValidSymbolicDomain

    protected boolean isValidSymbolicDomain(java.lang.String domain)

  Validates a symbolic domain name. Returns true if it's valid.
  Parameters:
    `domain` - symbolic domain name
  Returns:
    true if the symbolic domain name is valid.

### stripComments

    protected java.lang.String stripComments(java.lang.String emailStr)

  Recursively remove comments, and replace with a single space. The simpler regexps in the Email Addressing FAQ are imperfect - they will miss escaped chars in atoms, for example. Derived From Mail::RFC822::Address
  Parameters:
    `emailStr` - The email address
  Returns:
    address with comments removed.

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