org.talika.tarsis.filters.validator
Class ValidatorFilter

java.lang.Object
  org.talika.tarsis.filters.AbstractFilter
      org.talika.tarsis.filters.CommandFilter
          org.talika.tarsis.filters.validator.ValidatorFilter

All Implemented Interfaces:

javax.servlet.Filter

Direct Known Subclasses:

ExtendedValidatorFilter

public class ValidatorFilter
extends CommandFilter

ValidatorFilter validates command parameters sent in client's request.

Version:

$Revision: 269 $

Author:

Jose M. Palomar

Constructor Summary

ValidatorFilter()

Method Summary

protected void	checkRequired(CommandParameter parameter, java.lang.String value) Checks if a parameter required was sent.
void	doFilter(javax.servlet.ServletRequest servletRequest, javax.servlet.ServletResponse servletResponse, javax.servlet.FilterChain filterChain) Validates command parameters sent in client's request.
protected java.lang.Object	getMultipleParameter(CommandParameter parameter, java.lang.String[] values) Obtains parsed Collection of parameters values from array of string values.
protected java.lang.Object	getParameter(CommandParameter parameter, java.lang.String value) Obtains parsed parameter value from string value.
protected void	validate(CommandParameter[] parameters, javax.servlet.ServletRequest request) Validates command parameters sent in request.

Methods inherited from class org.talika.tarsis.filters.CommandFilter

destroy, findCommand, getCommandFactory, init

Methods inherited from class org.talika.tarsis.filters.AbstractFilter

getContext, getFilterConfig, getLogger

Methods inherited from class java.lang.Object

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

Constructor Detail

ValidatorFilter

public ValidatorFilter()

Method Detail

doFilter

public void doFilter(javax.servlet.ServletRequest servletRequest,
                     javax.servlet.ServletResponse servletResponse,
                     javax.servlet.FilterChain filterChain)
              throws java.io.IOException,
                     javax.servlet.ServletException

Validates command parameters sent in client's request.

Specified by:

doFilter in interface javax.servlet.Filter

Specified by:

doFilter in class AbstractFilter

Parameters:

servletRequest - ServletRequest the ServletRequest object that contains the client's request.

servletResponse - ServletResponse the ServletResponse object that contains the servlet's response.

filterChain - FilterChain invocation chain of filtered request.

Throws:

java.io.IOException - if an input or output exception occurs

javax.servlet.ServletException - if an exception has occurred that interferes with the filter's normal operation

See Also:

Filter.doFilter(ServletRequest, ServletResponse, FilterChain)

validate

protected final void validate(CommandParameter[] parameters,
                              javax.servlet.ServletRequest request)
                       throws InvalidParametersException

Validates command parameters sent in request.

Parameters:

parameters - CommandParameter[] array of parameters definitions.

request - ServletRequest the ServletRequest object that contains the client's request.

Throws:

InvalidParametersException - if a invalid parameter value was found.

checkRequired

protected final void checkRequired(CommandParameter parameter,
                                   java.lang.String value)
                            throws RequiredParameterException

Checks if a parameter required was sent.

Parameters:

parameter - CommandParameter parameter definition.

value - String parameter value.

Throws:

RequiredParameterException - if parameter is required and was not sent.

getParameter

protected final java.lang.Object getParameter(CommandParameter parameter,
                                              java.lang.String value)
                                       throws InvalidValueException

Obtains parsed parameter value from string value.

Parameters:

parameter - CommandParameter parameter definition.

value - String parameter value.

Returns:

Object parsed parameter value.

Throws:

InvalidValueException - if parameter value can not be parsed.

getMultipleParameter

protected final java.lang.Object getMultipleParameter(CommandParameter parameter,
                                                      java.lang.String[] values)
                                               throws InvalidValueException

Obtains parsed Collection of parameters values from array of string values.

Parameters:

parameter - CommandParameter parameter definition.

values - String[] array of parameter values.

Returns:

Object Collection of parsed parameters values.

Throws:

InvalidValueException - if parameters values can not be parsed.