DomainValidator (Apache Commons Validator 1.6 API)

java.lang.Object
- org.apache.commons.validator.routines.DomainValidator

All Implemented Interfaces:

Serializable
```
public class DomainValidator
extends Object
implements Serializable
```
Domain name validation routines.

This validator provides methods for validating Internet domain names and top-level domains.

Domain names are evaluated according to the standards RFC1034, section 3, and RFC1123, section 2.1. No accommodation is provided for the specialized needs of other applications; if the domain name has been URL-encoded, for example, validation will fail even though the equivalent plaintext version of the same name would have passed.

Validation is also provided for top-level domains (TLDs) as defined and maintained by the Internet Assigned Numbers Authority (IANA):
- isValidInfrastructureTld(java.lang.String) - validates infrastructure TLDs (.arpa, etc.)
- isValidGenericTld(java.lang.String) - validates generic TLDs (.com, .org, etc.)
- isValidCountryCodeTld(java.lang.String) - validates country code TLDs (.us, .uk, .cn, etc.)
(NOTE: This class does not provide IP address lookup for domain names or methods to ensure that a given domain name matches a specific IP; see InetAddress for that functionality.)
Since:

Validator 1.4

Version:

$Revision: 1781829 $

See Also:
Serialized Form

Nested Class Summary

Nested Classes
Modifier and Type	Class and Description
`static class`	`DomainValidator.ArrayType` enum used by `updateTLDOverride(ArrayType, String[])` to determine which override array to update / fetch

Method Summary

Methods
Modifier and Type	Method and Description
`static DomainValidator`	`getInstance()` Returns the singleton instance of this validator.
`static DomainValidator`	`getInstance(boolean allowLocal)` Returns the singleton instance of this validator, with local validation as required.
`static String[]`	`getTLDEntries(DomainValidator.ArrayType table)` Get a copy of the internal array.
`boolean`	`isValid(String domain)` Returns true if the specified `String` parses as a valid domain name with a recognized top-level domain.
`boolean`	`isValidCountryCodeTld(String ccTld)` Returns true if the specified `String` matches any IANA-defined country code top-level domain.
`boolean`	`isValidGenericTld(String gTld)` Returns true if the specified `String` matches any IANA-defined generic top-level domain.
`boolean`	`isValidInfrastructureTld(String iTld)` Returns true if the specified `String` matches any IANA-defined infrastructure top-level domain.
`boolean`	`isValidLocalTld(String lTld)` Returns true if the specified `String` matches any widely used "local" domains (localhost or localdomain).
`boolean`	`isValidTld(String tld)` Returns true if the specified `String` matches any IANA-defined top-level domain.
`static void`	`updateTLDOverride(DomainValidator.ArrayType table, String[] tlds)` Update one of the TLD override arrays.

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

- Method Detail
  - getInstance
```
public static DomainValidator getInstance()
```
    Returns the singleton instance of this validator. It will not consider local addresses as valid.
    
    Returns:
    the singleton instance of this validator
  - getInstance
```
public static DomainValidator getInstance(boolean allowLocal)
```
    Returns the singleton instance of this validator, with local validation as required.
    
    Parameters:
    allowLocal - Should local addresses be considered valid?
    
    Returns:
    the singleton instance of this validator
  - isValid
```
public boolean isValid(String domain)
```
    Returns true if the specified String parses as a valid domain name with a recognized top-level domain. The parsing is case-insensitive.
    
    Parameters:
    domain - the parameter to check for domain name syntax
    
    Returns:
    true if the parameter is a valid domain name
  - isValidTld
```
public boolean isValidTld(String tld)
```
    Returns true if the specified String matches any IANA-defined top-level domain. Leading dots are ignored if present. The search is case-insensitive.
    
    Parameters:
    tld - the parameter to check for TLD status, not null
    
    Returns:
    true if the parameter is a TLD
  - isValidInfrastructureTld
```
public boolean isValidInfrastructureTld(String iTld)
```
    Returns true if the specified String matches any IANA-defined infrastructure top-level domain. Leading dots are ignored if present. The search is case-insensitive.
    
    Parameters:
    iTld - the parameter to check for infrastructure TLD status, not null
    
    Returns:
    true if the parameter is an infrastructure TLD
  - isValidGenericTld
```
public boolean isValidGenericTld(String gTld)
```
    Returns true if the specified String matches any IANA-defined generic top-level domain. Leading dots are ignored if present. The search is case-insensitive.
    
    Parameters:
    gTld - the parameter to check for generic TLD status, not null
    
    Returns:
    true if the parameter is a generic TLD
  - isValidCountryCodeTld
```
public boolean isValidCountryCodeTld(String ccTld)
```
    Returns true if the specified String matches any IANA-defined country code top-level domain. Leading dots are ignored if present. The search is case-insensitive.
    
    Parameters:
    ccTld - the parameter to check for country code TLD status, not null
    
    Returns:
    true if the parameter is a country code TLD
  - isValidLocalTld
```
public boolean isValidLocalTld(String lTld)
```
    Returns true if the specified String matches any widely used "local" domains (localhost or localdomain). Leading dots are ignored if present. The search is case-insensitive.
    
    Parameters:
    lTld - the parameter to check for local TLD status, not null
    
    Returns:
    true if the parameter is an local TLD
  - updateTLDOverride
```
public static void updateTLDOverride(DomainValidator.ArrayType table,
                     String[] tlds)
```
    Update one of the TLD override arrays. This must only be done at program startup, before any instances are accessed using getInstance.
    For example:
    DomainValidator.updateTLDOverride(ArrayType.GENERIC_PLUS, new String[]{"apache"})
    To clear an override array, provide an empty array.
    Parameters:
    table - the table to update, see DomainValidator.ArrayType Must be one of the following
    
    COUNTRY_CODE_MINUS
    
    COUNTRY_CODE_PLUS
    
    GENERIC_MINUS
    
    GENERIC_PLUS
    tlds - the array of TLDs, must not be null
    
    Throws:
    
    IllegalStateException - if the method is called after getInstance
    
    IllegalArgumentException - if one of the read-only tables is requested
    Since:
    
    1.5.0
  - getTLDEntries
```
public static String[] getTLDEntries(DomainValidator.ArrayType table)
```
    Get a copy of the internal array.
    
    Parameters:
    table - the array type (any of the enum values)
    
    Returns:
    a copy of the array
    
    Throws:
    
    IllegalArgumentException - if the table type is unexpected (should not happen)
    Since:
    
    1.5.1

Class DomainValidator

Nested Class Summary

Method Summary

Methods inherited from class java.lang.Object

Method Detail

getInstance

getInstance

isValid

isValidTld

isValidInfrastructureTld

isValidGenericTld

isValidCountryCodeTld

isValidLocalTld

updateTLDOverride

getTLDEntries