Package org.apache.wicket.validation.validator

Class UrlValidator

java.lang.Object
org.apache.wicket.validation.validator.UrlValidator
All Implemented Interfaces:
Serializable, IClusterable, IValidator<String>
public class UrlValidator extends Object implements IValidator<String>
Validator for checking URLs. The default schemes allowed are http://, https://, and ftp://.

The behavior of validation is modified by passing in one of these options:

  • ALLOW_2_SLASHES - [FALSE]: Allows double '/' characters in the path component.
  • NO_FRAGMENT- [FALSE]: By default fragments are allowed. If this option is included then fragments are flagged as illegal.
  • ALLOW_ALL_SCHEMES - [FALSE]: By default only http, https, and ftp are considered valid schemes. Enabling this option will let any scheme pass validation.

This was originally based org.apache.commons.validator.UrlValidator, but the dependency on Jakarta-ORO was removed and it now uses java.util.regexp instead. Usage example: 

 <code>
 Component.add(new UrlValidator({"http", "https"}));
 </code>
Since:
1.2.6
Author:
Vincent Demay
See Also:

  • Field Summary

    Fields
    Modifier and Type
    Field
    Description
    static final int
    ALLOW_2_SLASHES
    Allow two slashes in the path component of the URL.
    static final int
    ALLOW_ALL_SCHEMES
    Allows all validly-formatted schemes to pass validation instead of supplying a set of valid schemes.
    protected String[]
    defaultSchemes
    If no schemes are provided, default to this set of protocols.
    static final int
    NO_FRAGMENTS
    Enabling this option disallows any URL fragments.

  • Constructor Summary

    Constructors
    Constructor
    Description
    UrlValidator()
    Constructs a UrlValidator with default properties.
    UrlValidator(int options)
    Constructs a UrlValidator with the given validation options.
    UrlValidator(String[] schemes)
    Constructs a UrlValidator with the given String array of scheme options.
    UrlValidator(String[] schemes, int options)
    Constructs a UrlValidator with the given scheme and validation options (see class description).

  • Method Summary

    Modifier and Type
    Method
    Description
    protected int
    countToken(String token, String target)
    Returns the number of times the token appears in the target.
    protected IValidationError
    decorate(IValidationError error, IValidatable<String> validatable)
    Allows subclasses to decorate reported errors
    static boolean
    isBlankOrNull(String value)
    Checks if the field isn't null and if length of the field is greater than zero, not including whitespace.
    boolean
    isOff(long flag)
    Tests whether the given flag is off.
    boolean
    isOn(long flag)
    Tests whether the given flag is on.
    final boolean
    isValid(String value)
    Checks if a field has a valid URL.
    protected boolean
    isValidAuthority(String authority)
    Returns true if the authority is properly formatted.
    protected boolean
    isValidFragment(String fragment)
    Returns true if the given fragment is null or fragments are allowed.
    protected boolean
    isValidPath(String path)
    Returns true if the path is valid.
    protected boolean
    isValidQuery(String query)
    Returns true if the query is null or if it's a properly-formatted query string.
    protected boolean
    isValidScheme(String scheme)
    Validates a scheme.
    void
    validate(IValidatable<String> validatable)
    Validates the IValidatable instance.

    Methods inherited from class java.lang.Object

    clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

  • Field Details

  • Constructor Details

    • UrlValidator

      public UrlValidator()
      Constructs a UrlValidator with default properties.

    • UrlValidator

      public UrlValidator(String[] schemes)
      Constructs a UrlValidator with the given String array of scheme options. The validation is modified by passing in options in the schemes argument.
      Parameters:
      schemes - Pass in one or more URL schemes to consider valid. Passing in a null will default to "http,https,ftp" being used. If a non-null scheme is specified, then all valid schemes must be specified. Setting the ALLOW_ALL_SCHEMES option will ignore the contents of schemes.

    • UrlValidator

      public UrlValidator(int options)
      Constructs a UrlValidator with the given validation options.
      Parameters:
      options - The options should be set using the public constants declared in this class. To set multiple options you simply add them together. For example, ALLOW_2_SLASHES + NO_FRAGMENTS enables both of those options.

    • UrlValidator

      public UrlValidator(String[] schemes, int options)
      Constructs a UrlValidator with the given scheme and validation options (see class description).
      Parameters:
      schemes - Pass in one or more URL schemes to consider valid. Passing in a null will default to "http,https,ftp" being used. If a non-null scheme is specified, then all valid schemes must be specified. Setting the ALLOW_ALL_SCHEMES option will ignore the contents of schemes.
      options - The options should be set using the public constants declared in this class. To set multiple options you simply add them together. For example, ALLOW_2_SLASHES + NO_FRAGMENTS enables both of those options.

  • Method Details

    • validate

      public void validate(IValidatable<String> validatable)
      Description copied from interface: IValidator
      Validates the IValidatable instance. Validation errors should be reported using the IValidatable.error(IValidationError) method.
      Specified by:
      validate in interface IValidator<String>
      Parameters:
      validatable - the IValidatable instance being validated

    • decorate

      protected IValidationError decorate(IValidationError error, IValidatable<String> validatable)
      Allows subclasses to decorate reported errors
      Parameters:
      error -
      Returns:
      decorated error

    • isValid

      public final boolean isValid(String value)
      Checks if a field has a valid URL. This method is public because it is directly used in tests.
      Parameters:
      value - The value validation is being performed on. A null value is considered invalid.
      Returns:
      true if the URL is valid

    • isValidScheme

      protected boolean isValidScheme(String scheme)
      Validates a scheme. If schemes[] was initialized to non-null, then only those schemes are allowed. Note that this is slightly different than for the constructor.
      Parameters:
      scheme - The scheme to validate. A null value is considered invalid.
      Returns:
      true if the URL is valid

    • isValidAuthority

      protected boolean isValidAuthority(String authority)
      Returns true if the authority is properly formatted. An authority is the combination of host name and port. A null authority value is considered invalid.
      Parameters:
      authority - an authority value to validate
      Returns:
      true if authority (host name and port) is valid.

    • isValidPath

      protected boolean isValidPath(String path)
      Returns true if the path is valid. A null value is considered invalid.
      Parameters:
      path - a path value to validate.
      Returns:
      true if path is valid.

    • isValidQuery

      protected boolean isValidQuery(String query)
      Returns true if the query is null or if it's a properly-formatted query string.
      Parameters:
      query - a query value to validate
      Returns:
      true if the query is valid

    • isValidFragment

      protected boolean isValidFragment(String fragment)
      Returns true if the given fragment is null or fragments are allowed.
      Parameters:
      fragment - a fragment value to validate
      Returns:
      true if the fragment is valid

    • countToken

      protected int countToken(String token, String target)
      Returns the number of times the token appears in the target.
      Parameters:
      token - a token value to be counted
      target - a target String to count tokens in
      Returns:
      the number of tokens

    • isBlankOrNull

      public static boolean isBlankOrNull(String value)
      Checks if the field isn't null and if length of the field is greater than zero, not including whitespace.
      Parameters:
      value - the value validation is being performed on
      Returns:
      true if blank or null

    • isOn

      public boolean isOn(long flag)
      Tests whether the given flag is on. If the flag is not a power of 2 (ie. 3) this tests whether the combination of flags is on.
      Parameters:
      flag - flag value to check
      Returns:
      whether the specified flag value is on

    • isOff

      public boolean isOff(long flag)
      Tests whether the given flag is off. If the flag is not a power of 2 (ie. 3) this tests whether the combination of flags is off.
      Parameters:
      flag - flag value to check.
      Returns:
      whether the specified flag value is off