org.owasp.esapi

Class ValidationErrorList

java.lang.Object

org.owasp.esapi.ValidationErrorList

public class ValidationErrorList
extends Object

The ValidationErrorList class defines a well-formed collection of ValidationExceptions so that groups of validation functions can be called in a non-blocking fashion.

To use the ValidationErrorList to execute groups of validation attempts, your controller code would look something like:

 ValidationErrorList() errorList = new ValidationErrorList();.
 String name  = getValidInput("Name", form.getName(), "SomeESAPIRegExName1", 255, false, errorList);
 String address = getValidInput("Address", form.getAddress(), "SomeESAPIRegExName2", 255, false, errorList);
 Integer weight = getValidInteger("Weight", form.getWeight(), 1, 1000000000, false, errorList);
 Integer sortOrder = getValidInteger("Sort Order", form.getSortOrder(), -100000, +100000, false, errorList);
 request.setAttribute( "ERROR_LIST", errorList );
 

The at your view layer you would be able to retrieve all of your error messages via a helper function like:

 public static ValidationErrorList getErrors() {          
     HttpServletRequest request = ESAPI.httpUtilities().getCurrentRequest();
     ValidationErrorList errors = new ValidationErrorList();
     if (request.getAttribute(Constants.ERROR_LIST) != null) {
        errors = (ValidationErrorList)request.getAttribute("ERROR_LIST");
     }
           return errors;
 }
 

You can list all errors like:

 <%
      for (Object vo : errorList.errors()) {
         ValidationException ve = (ValidationException)vo;
 %>
 <%= ESAPI.encoder().encodeForHTML(ve.getMessage()) %>

 <%
     }
 %>
 

And even check if a specific UI component is in error via calls like:

 ValidationException e = errorList.getError("Name");
 

Since:

August 15, 2008

Author:

Jim Manico (jim@manico.net) Manico.net

Constructor Summary

Constructors

Constructor and Description
ValidationErrorList()

Method Summary

Methods

Modifier and Type	Method and Description
void	addError(String context, ValidationException vex) Adds a new error to list with a unique named context.
List<ValidationException>	errors() Returns list of ValidationException, or empty list of no errors exist.
ValidationException	getError(String context) Retrieves ValidationException for given context if one exists.
boolean	isEmpty() Returns true if no error are present.
int	size() Returns the numbers of errors present.

Methods inherited from class java.lang.Object

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

Constructor Detail

ValidationErrorList

public ValidationErrorList()

Method Detail

addError

public void addError(String context,
            ValidationException vex)

Adds a new error to list with a unique named context. No action taken if either element is null. Existing contexts will be overwritten.

Parameters:

context - Unique named context for this ValidationErrorList.

vex - A ValidationException.

errors

public List<ValidationException> errors()

Returns list of ValidationException, or empty list of no errors exist.

Returns:

List

getError

public ValidationException getError(String context)

Retrieves ValidationException for given context if one exists.

Parameters:

context - unique name for each error

Returns:

ValidationException or null for given context

isEmpty

public boolean isEmpty()

Returns true if no error are present.

Returns:

boolean

size

public int size()

Returns the numbers of errors present.

Returns:

boolean