org.restlet.routing
Class Validator

java.lang.Object
  org.restlet.Restlet
      org.restlet.routing.Filter
          org.restlet.routing.Validator

All Implemented Interfaces:

Uniform

public class Validator
extends Filter

Filter validating attributes from a call. Validation is verified based on regex pattern matching.

Concurrency note: instances of this class or its subclasses can be invoked by several threads at the same time and therefore must be thread-safe. You should be especially careful when storing state in member variables.

Author:

Jerome Louvel

See Also:

Pattern

Field Summary

Fields inherited from class org.restlet.routing.Filter

CONTINUE, SKIP, STOP

Constructor Summary

Validator()
Constructor.

Validator(Context context)
Constructor.

Validator(Context context, Restlet next)
Constructor.

Method Summary

protected int	beforeHandle(Request request, Response response) Allows filtering before its handling by the target Restlet.
void	validate(String attribute, boolean required, String format) Checks the request attributes for presence or format.
void	validateFormat(String attribute, String format) Checks the request attributes for format only.
void	validatePresence(String attribute) Checks the request attributes for presence only.

Methods inherited from class org.restlet.routing.Filter

afterHandle, doHandle, getNext, handle, hasNext, setNext, setNext, start, stop

Methods inherited from class org.restlet.Restlet

createFinder, finalize, getApplication, getAuthor, getContext, getDescription, getFinderClass, getLogger, getName, getOwner, handle, handle, handle, isStarted, isStopped, setAuthor, setContext, setDescription, setFinderClass, setName, setOwner

Methods inherited from class java.lang.Object

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

Constructor Detail

Validator

public Validator()

Constructor.

Validator

public Validator(Context context)

Constructor.

Parameters:

context - The context.

Validator

public Validator(Context context,
                 Restlet next)

Constructor.

Parameters:

context - The context.

next - The next Restlet.

Method Detail

beforeHandle

protected int beforeHandle(Request request,
                           Response response)

Allows filtering before its handling by the target Restlet. By default it parses the template variable, adjust the base reference, then extracts the attributes from form parameters (query, cookies, entity) and finally tries to validate the variables as indicated by the validate(String, boolean, String) method.

Overrides:

beforeHandle in class Filter

Parameters:

request - The request to filter.

response - The response to filter.

Returns:

The Filter.CONTINUE status.

validate

public void validate(String attribute,
                     boolean required,
                     String format)

Checks the request attributes for presence or format. If the check fails, then a response status CLIENT_ERROR_BAD_REQUEST is returned with the proper status description.

Parameters:

attribute - Name of the attribute to look for.

required - Indicates if the attribute presence is required.

format - Format of the attribute value, using Regex pattern syntax.

validateFormat

public void validateFormat(String attribute,
                           String format)

Checks the request attributes for format only. If the check fails, then a response status CLIENT_ERROR_BAD_REQUEST is returned with the proper status description.

Parameters:

attribute - Name of the attribute to look for.

format - Format of the attribute value, using Regex pattern syntax.

validatePresence

public void validatePresence(String attribute)

Checks the request attributes for presence only. If the check fails, then a response status CLIENT_ERROR_BAD_REQUEST is returned with the proper status description.

Parameters:

attribute - Name of the attribute to look for.