com.interface21.validation
Interface Errors

All Known Implementing Classes:
BindException, EscapedErrors

public interface Errors

Interface to be implemented by objects that can store and expose information about data binding errors.

Field names can be properties of the given object (e.g. "name" when binding to a customer object), or nested fields in case of subobjects (e.g. "address.street"). Supports subtree navigation via setNestedPath, e.g. an AddressValidator validates "address", not being aware that this is a subobject of customer.

Note: Errors objects are single-threaded.

Author:
Rod Johnson, Juergen Hoeller
See Also:
setNestedPath(java.lang.String)

Method Summary
 java.util.List getAllErrors()
          Get all errors, both global and field ones.
 int getErrorCount()
          Return the total number of errors.
 FieldError getFieldError(java.lang.String field)
          Get the first error associated with the given field, if any.
 int getFieldErrorCount(java.lang.String field)
          Return the number of errors associated with the given field.
 java.util.List getFieldErrors(java.lang.String field)
          Get all errors associated with the given field.
 java.lang.Object getFieldValue(java.lang.String field)
          Return the current value of the given field, either the current bean property value or a rejected update from the last binding.
 ObjectError getGlobalError()
          Get the first global error, if any.
 int getGlobalErrorCount()
          Return the number of global (i.e. not field-specific) errors.
 java.util.List getGlobalErrors()
          Get all global errors.
 java.lang.String getObjectName()
          Return the name of the bound object.
 boolean hasErrors()
          Return if there were any errors.
 boolean hasFieldErrors(java.lang.String field)
          Return if there are any errors associated with the given field.
 boolean hasGlobalErrors()
          Return if there were any global (i.e. not field-specific) errors.
 void reject(java.lang.String errorCode, java.lang.Object[] errorArgs, java.lang.String defaultMessage)
          Reject the current object, using the given error description.
 void rejectValue(java.lang.String field, java.lang.String errorCode, java.lang.Object[] errorArgs, java.lang.String defaultMessage)
          Reject the given field of the current object, using the given error description.
 void setNestedPath(java.lang.String nestedPath)
          Allow context to be changed so that standard validators can validate subtrees.
 

Method Detail

getObjectName

public java.lang.String getObjectName()
Return the name of the bound object.

reject

public void reject(java.lang.String errorCode,
                   java.lang.Object[] errorArgs,
                   java.lang.String defaultMessage)
Reject the current object, using the given error description.
Parameters:
errorCode - error code, interpretable as message key
errorArgs - error arguments, for argument binding via MessageFormat
defaultMessage - fallback default message

rejectValue

public void rejectValue(java.lang.String field,
                        java.lang.String errorCode,
                        java.lang.Object[] errorArgs,
                        java.lang.String defaultMessage)
Reject the given field of the current object, using the given error description.
Parameters:
field - field name
errorCode - error code, interpretable as message key
errorArgs - error arguments, for argument binding via MessageFormat
defaultMessage - fallback default message

hasErrors

public boolean hasErrors()
Return if there were any errors.

getErrorCount

public int getErrorCount()
Return the total number of errors.

getAllErrors

public java.util.List getAllErrors()
Get all errors, both global and field ones.
Returns:
List of ObjectError instances

hasGlobalErrors

public boolean hasGlobalErrors()
Return if there were any global (i.e. not field-specific) errors.

getGlobalErrorCount

public int getGlobalErrorCount()
Return the number of global (i.e. not field-specific) errors.

getGlobalErrors

public java.util.List getGlobalErrors()
Get all global errors.
Returns:
List of ObjectError instances

getGlobalError

public ObjectError getGlobalError()
Get the first global error, if any.
Returns:
the global error, or null

hasFieldErrors

public boolean hasFieldErrors(java.lang.String field)
Return if there are any errors associated with the given field.
Parameters:
field - field name
Returns:
if there were any errors associated with the given field

getFieldErrorCount

public int getFieldErrorCount(java.lang.String field)
Return the number of errors associated with the given field.
Parameters:
field - field name
Returns:
the number of errors associated with the given field

getFieldErrors

public java.util.List getFieldErrors(java.lang.String field)
Get all errors associated with the given field.
Parameters:
field - field name
Returns:
List of FieldError instances

getFieldError

public FieldError getFieldError(java.lang.String field)
Get the first error associated with the given field, if any.
Returns:
the field-specific error, or null

getFieldValue

public java.lang.Object getFieldValue(java.lang.String field)
Return the current value of the given field, either the current bean property value or a rejected update from the last binding. Allows for convenient access to user-specified field values, even if there were type mismatches.
Parameters:
field - field name
Returns:
the current value of the given field

setNestedPath

public void setNestedPath(java.lang.String nestedPath)
Allow context to be changed so that standard validators can validate subtrees. Reject calls prepend the given nested path to the field names.

For example, an address validator could validate the subobject address of a customer object.

Parameters:
nestedPath - nested path within this object, e.g. "address" (defaults to "", null is also acceptable)


Rod Johnson and Spring contributors 2001-2003.