org.springframework.validation
Class BindException

java.lang.Object
  extended byjava.lang.Throwable
      extended byjava.lang.Exception
          extended byorg.springframework.validation.BindException
All Implemented Interfaces:
Errors, Serializable

public class BindException
extends Exception
implements Errors

Default implementation of the Errors interface, supporting registration and evaluation of binding errors. Slightly unusual, as it is an exception.

This is mainly a framework-internal class. Normally, application code will work with the Errors interface, or a DataBinder that in turn exposes a BindException via getErrors().

Supports exporting a model, suitable for example for web MVC. Thus, it is sometimes used as parameter type instead of the Errors interface itself - if extracting the model makes sense in the particular context.

Author:
Rod Johnson, Juergen Hoeller
See Also:
getModel(), DataBinder.getErrors(), Serialized Form

Field Summary
static String ERROR_KEY_PREFIX
          Prefix for the name of the Errors instance in a model, followed by the object name.
 
Fields inherited from class java.lang.Exception
 
Fields inherited from interface org.springframework.validation.Errors
NESTED_PATH_SEPARATOR
 
Constructor Summary
BindException(Object target, String name)
          Create a new BindException instance.
 
Method Summary
protected  void addError(ObjectError error)
          Add a FieldError to the errors list.
protected  void doSetNestedPath(String nestedPath)
          Actually set the nested path.
protected  String fixedField(String field)
          Transform the given field into its full path, regarding the nested path of this instance.
 List getAllErrors()
          Get all errors, both global and field ones.
protected  BeanWrapper getBeanWrapper()
          Return the BeanWrapper that this instance uses.
 PropertyEditor getCustomEditor(String field)
          Retrieve the custom PropertyEditor for the given field, if any.
 int getErrorCount()
          Return the total number of errors.
 FieldError getFieldError(String field)
          Get the first error associated with the given field, if any.
 int getFieldErrorCount(String field)
          Return the number of errors associated with the given field.
 List getFieldErrors(String field)
          Get all errors associated with the given field.
 Object getFieldValue(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.
 List getGlobalErrors()
          Get all global errors.
 String getMessage()
          Returns diagnostic information about the errors held in this object.
 MessageCodesResolver getMessageCodesResolver()
          Return the strategy to use for resolving errors into message codes.
 Map getModel()
          Return a model Map for the obtained state, exposing an Errors instance as 'ERROR_KEY_PREFIX + objectName' and the object itself.
 String getNestedPath()
          Return the current nested path of this Errors object.
 String getObjectName()
          Return the name of the bound object.
 Object getTarget()
          Return the wrapped target object.
 boolean hasErrors()
          Return if there were any errors.
 boolean hasFieldErrors(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.
protected  boolean isMatchingFieldError(String field, FieldError fieldError)
          Check whether the given FieldError matches the given field.
 void popNestedPath()
          Pop the former nested path from the nested path stack.
 void pushNestedPath(String subPath)
          Push the given sub path onto the nested path stack.
 void reject(String errorCode)
          Reject the current object, using the given error description.
 void reject(String errorCode, Object[] errorArgs, String defaultMessage)
          Reject the current object, using the given error description.
 void reject(String errorCode, String defaultMessage)
          Reject the current object, using the given error description.
 void rejectValue(String field, String errorCode)
          Reject the given field of the current object, using the given error description.
 void rejectValue(String field, String errorCode, Object[] errorArgs, String defaultMessage)
          Reject the given field of the current object, using the given error description.
 void rejectValue(String field, String errorCode, String defaultMessage)
          Reject the given field of the current object, using the given error description.
protected  String[] resolveMessageCodes(String errorCode)
           
protected  String[] resolveMessageCodes(String errorCode, String field)
           
 void setMessageCodesResolver(MessageCodesResolver messageCodesResolver)
          Set the strategy to use for resolving errors into message codes.
 void setNestedPath(String nestedPath)
          Allow context to be changed so that standard validators can validate subtrees.
 
Methods inherited from class java.lang.Throwable
fillInStackTrace, getCause, getLocalizedMessage, getStackTrace, initCause, printStackTrace, printStackTrace, printStackTrace, setStackTrace, toString
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait
 

Field Detail

ERROR_KEY_PREFIX

public static final String ERROR_KEY_PREFIX
Prefix for the name of the Errors instance in a model, followed by the object name.

Constructor Detail

BindException

public BindException(Object target,
                     String name)
Create a new BindException instance.

Parameters:
target - target object to bind onto
name - name of the target object
See Also:
DefaultMessageCodesResolver
Method Detail

getTarget

public Object getTarget()
Return the wrapped target object.


getObjectName

public String getObjectName()
Description copied from interface: Errors
Return the name of the bound object.

Specified by:
getObjectName in interface Errors

getBeanWrapper

protected BeanWrapper getBeanWrapper()
Return the BeanWrapper that this instance uses. Creates a new one if none existed before.


setMessageCodesResolver

public void setMessageCodesResolver(MessageCodesResolver messageCodesResolver)
Set the strategy to use for resolving errors into message codes. Default is DefaultMessageCodesResolver.

See Also:
DefaultMessageCodesResolver

getMessageCodesResolver

public MessageCodesResolver getMessageCodesResolver()
Return the strategy to use for resolving errors into message codes.


setNestedPath

public void setNestedPath(String nestedPath)
Description copied from interface: Errors
Allow context to be changed so that standard validators can validate subtrees. Reject calls prepend the given path to the field names.

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

Specified by:
setNestedPath in interface Errors
Parameters:
nestedPath - nested path within this object, e.g. "address" (defaults to "", null is also acceptable). Can end with a dot: both "address" and "address." are valid.

getNestedPath

public String getNestedPath()
Description copied from interface: Errors
Return the current nested path of this Errors object.

Returns a nested path with a dot, i.e. "address.", for easy building of concatenated paths. Default is an empty String.

Specified by:
getNestedPath in interface Errors

pushNestedPath

public void pushNestedPath(String subPath)
Description copied from interface: Errors
Push the given sub path onto the nested path stack. A popNestedStack call will reset the original nested path before the corresponding pushNestedPath call.

Using the nested path stack allows to set temporary nested paths for subobjects without having to worry about a temporary path holder.

For example: current path "spouse.", pushNestedPath("child") -> result path "spouse.child."; popNestedPath() -> "spouse." again

Specified by:
pushNestedPath in interface Errors
Parameters:
subPath - the sub path to push onto the nested path stack
See Also:
Errors.popNestedPath()

popNestedPath

public void popNestedPath()
                   throws IllegalArgumentException
Description copied from interface: Errors
Pop the former nested path from the nested path stack.

Specified by:
popNestedPath in interface Errors
Throws:
IllegalArgumentException
See Also:
Errors.pushNestedPath(java.lang.String)

doSetNestedPath

protected void doSetNestedPath(String nestedPath)
Actually set the nested path. Delegated to by setNestedPath and pushNestedPath.


fixedField

protected String fixedField(String field)
Transform the given field into its full path, regarding the nested path of this instance.


reject

public void reject(String errorCode)
Description copied from interface: Errors
Reject the current object, using the given error description.

Specified by:
reject in interface Errors
Parameters:
errorCode - error code, interpretable as message key

reject

public void reject(String errorCode,
                   String defaultMessage)
Description copied from interface: Errors
Reject the current object, using the given error description.

Specified by:
reject in interface Errors
Parameters:
errorCode - error code, interpretable as message key
defaultMessage - fallback default message

reject

public void reject(String errorCode,
                   Object[] errorArgs,
                   String defaultMessage)
Description copied from interface: Errors
Reject the current object, using the given error description.

Specified by:
reject in interface Errors
Parameters:
errorCode - error code, interpretable as message key
errorArgs - error arguments, for argument binding via MessageFormat (can be null)
defaultMessage - fallback default message

rejectValue

public void rejectValue(String field,
                        String errorCode)
Description copied from interface: Errors
Reject the given field of the current object, using the given error description.

Specified by:
rejectValue in interface Errors
Parameters:
field - the field name
errorCode - error code, interpretable as message key

rejectValue

public void rejectValue(String field,
                        String errorCode,
                        String defaultMessage)
Description copied from interface: Errors
Reject the given field of the current object, using the given error description.

Specified by:
rejectValue in interface Errors
Parameters:
field - the field name
errorCode - error code, interpretable as message key
defaultMessage - fallback default message

rejectValue

public void rejectValue(String field,
                        String errorCode,
                        Object[] errorArgs,
                        String defaultMessage)
Description copied from interface: Errors
Reject the given field of the current object, using the given error description.

Specified by:
rejectValue in interface Errors
Parameters:
field - the field name
errorCode - error code, interpretable as message key
errorArgs - error arguments, for argument binding via MessageFormat (can be null)
defaultMessage - fallback default message

resolveMessageCodes

protected String[] resolveMessageCodes(String errorCode)

resolveMessageCodes

protected String[] resolveMessageCodes(String errorCode,
                                       String field)

addError

protected void addError(ObjectError error)
Add a FieldError to the errors list. Intended to be used by subclasses like DataBinder.


hasErrors

public boolean hasErrors()
Description copied from interface: Errors
Return if there were any errors.

Specified by:
hasErrors in interface Errors

getErrorCount

public int getErrorCount()
Description copied from interface: Errors
Return the total number of errors.

Specified by:
getErrorCount in interface Errors

getAllErrors

public List getAllErrors()
Description copied from interface: Errors
Get all errors, both global and field ones.

Specified by:
getAllErrors in interface Errors
Returns:
List of ObjectError instances

hasGlobalErrors

public boolean hasGlobalErrors()
Description copied from interface: Errors
Return if there were any global (i.e. not field-specific) errors.

Specified by:
hasGlobalErrors in interface Errors

getGlobalErrorCount

public int getGlobalErrorCount()
Description copied from interface: Errors
Return the number of global (i.e. not field-specific) errors.

Specified by:
getGlobalErrorCount in interface Errors

getGlobalErrors

public List getGlobalErrors()
Description copied from interface: Errors
Get all global errors.

Specified by:
getGlobalErrors in interface Errors
Returns:
List of ObjectError instances

getGlobalError

public ObjectError getGlobalError()
Description copied from interface: Errors
Get the first global error, if any.

Specified by:
getGlobalError in interface Errors
Returns:
the global error, or null

hasFieldErrors

public boolean hasFieldErrors(String field)
Description copied from interface: Errors
Return if there are any errors associated with the given field.

Specified by:
hasFieldErrors in interface Errors
Parameters:
field - the field name
Returns:
if there were any errors associated with the given field

getFieldErrorCount

public int getFieldErrorCount(String field)
Description copied from interface: Errors
Return the number of errors associated with the given field.

Specified by:
getFieldErrorCount in interface Errors
Parameters:
field - the field name
Returns:
the number of errors associated with the given field

getFieldErrors

public List getFieldErrors(String field)
Description copied from interface: Errors
Get all errors associated with the given field.

Should support full field names like "name" but also pattern matches like "na*" or "address.*".

Specified by:
getFieldErrors in interface Errors
Parameters:
field - the field name
Returns:
List of FieldError instances

getFieldError

public FieldError getFieldError(String field)
Description copied from interface: Errors
Get the first error associated with the given field, if any.

Specified by:
getFieldError in interface Errors
Returns:
the field-specific error, or null

isMatchingFieldError

protected boolean isMatchingFieldError(String field,
                                       FieldError fieldError)
Check whether the given FieldError matches the given field.

Parameters:
field - the field that we are looking up FieldErrors for
fieldError - the candidate FieldError
Returns:
whether the FieldError matches the given field

getFieldValue

public Object getFieldValue(String field)
Description copied from interface: Errors
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.

Specified by:
getFieldValue in interface Errors
Parameters:
field - the field name
Returns:
the current value of the given field

getCustomEditor

public PropertyEditor getCustomEditor(String field)
Retrieve the custom PropertyEditor for the given field, if any.

Parameters:
field - the field name
Returns:
the custom PropertyEditor, or null

getModel

public Map getModel()
Return a model Map for the obtained state, exposing an Errors instance as 'ERROR_KEY_PREFIX + objectName' and the object itself.

Note that the Map is constructed every time you're calling this method. Adding things to the map and then re-calling this method will not work.

The attributes in the model Map returned by this method are usually included in the ModelAndView for a form view that uses Spring's bind tag, which needs access to the Errors instance. Spring's SimpleFormController will do this for you when rendering its form or success view. When building the ModelAndView yourself, you need to include the attributes from the model Map returned by this method yourself.

See Also:
getObjectName(), ERROR_KEY_PREFIX, ModelAndView, BindTag, SimpleFormController

getMessage

public String getMessage()
Returns diagnostic information about the errors held in this object.



Copyright (C) 2003-2004 The Spring Framework Project.