org.springframework.validation

Interface Errors

All Known Subinterfaces:

BindingResult

All Known Implementing Classes:

AbstractBindingResult, AbstractErrors, AbstractPropertyBindingResult, BeanPropertyBindingResult, BindException, DirectFieldBindingResult, EscapedErrors, MapBindingResult, MethodArgumentNotValidException, WebExchangeBindException

public interface Errors

Stores and exposes information about data-binding and validation errors for a specific object.

Field names are typically properties of the target object (e.g. "name" when binding to a customer object). Implementations may also support nested fields in case of nested objects (e.g. "address.street"), in conjunction with subtree navigation via setNestedPath(java.lang.String): for example, an AddressValidator may validate "address", not being aware that this is a nested object of a top-level customer object.

Note: Errors objects are single-threaded.

Author:

Rod Johnson, Juergen Hoeller

See Also:

Validator, ValidationUtils, BindException, BindingResult

Field Summary

Fields

Modifier and Type	Field and Description
static String	NESTED_PATH_SEPARATOR The separator between path elements in a nested path, for example in "customer.name" or "customer.address.street".

Method Summary

Modifier and Type	Method and Description
void	addAllErrors(Errors errors) Add all errors from the given Errors instance to this Errors instance.
List<ObjectError>	getAllErrors() Get all errors, both global and field ones.
int	getErrorCount() Determine the total number of errors.
FieldError	getFieldError() Get the first error associated with a field, if any.
FieldError	getFieldError(String field) Get the first error associated with the given field, if any.
int	getFieldErrorCount() Determine the number of errors associated with a field.
int	getFieldErrorCount(String field) Determine the number of errors associated with the given field.
List<FieldError>	getFieldErrors() Get all errors associated with a field.
List<FieldError>	getFieldErrors(String field) Get all errors associated with the given field.
Class<?>	getFieldType(String field) Determine the type of the given field, as far as possible.
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() Determine the number of global errors.
List<ObjectError>	getGlobalErrors() Get all global errors.
String	getNestedPath() Return the current nested path of this Errors object.
String	getObjectName() Return the name of the bound root object.
boolean	hasErrors() Determine if there were any errors.
boolean	hasFieldErrors() Determine if there were any errors associated with a field.
boolean	hasFieldErrors(String field) Determine if there were any errors associated with the given field.
boolean	hasGlobalErrors() Determine if there were any global errors.
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) Register a global error for the entire target object, using the given error description.
void	reject(String errorCode, Object[] errorArgs, String defaultMessage) Register a global error for the entire target object, using the given error description.
void	reject(String errorCode, String defaultMessage) Register a global error for the entire target object, using the given error description.
void	rejectValue(String field, String errorCode) Register a field error for the specified field of the current object (respecting the current nested path, if any), using the given error description.
void	rejectValue(String field, String errorCode, Object[] errorArgs, String defaultMessage) Register a field error for the specified field of the current object (respecting the current nested path, if any), using the given error description.
void	rejectValue(String field, String errorCode, String defaultMessage) Register a field error for the specified field of the current object (respecting the current nested path, if any), using the given error description.
void	setNestedPath(String nestedPath) Allow context to be changed so that standard validators can validate subtrees.

Field Detail

NESTED_PATH_SEPARATOR

static final String NESTED_PATH_SEPARATOR

The separator between path elements in a nested path, for example in "customer.name" or "customer.address.street".

"." = same as the nested property separator in the beans package.

See Also:

Constant Field Values

Method Detail

getObjectName

String getObjectName()

Return the name of the bound root object.

setNestedPath

void setNestedPath(String nestedPath)

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.

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.

See Also:

getNestedPath()

getNestedPath

String getNestedPath()

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.

See Also:

setNestedPath(String)

pushNestedPath

void pushNestedPath(String subPath)

Push the given sub path onto the nested path stack.

A popNestedPath() call will reset the original nested path before the corresponding pushNestedPath(String) 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.

Parameters:

subPath - the sub path to push onto the nested path stack

See Also:

popNestedPath()

popNestedPath

void popNestedPath()
            throws IllegalStateException

Pop the former nested path from the nested path stack.

Throws:

IllegalStateException - if there is no former nested path on the stack

See Also:

pushNestedPath(String)

reject

void reject(String errorCode)

Register a global error for the entire target object, using the given error description.

Parameters:

errorCode - error code, interpretable as a message key

See Also:

reject(String, Object[], String)

reject

void reject(String errorCode,
            String defaultMessage)

Register a global error for the entire target object, using the given error description.

Parameters:

errorCode - error code, interpretable as a message key

defaultMessage - fallback default message

See Also:

reject(String, Object[], String)

reject

void reject(String errorCode,
            @Nullable
            Object[] errorArgs,
            @Nullable
            String defaultMessage)

Register a global error for the entire target object, using the given error description.

Parameters:

errorCode - error code, interpretable as a message key

errorArgs - error arguments, for argument binding via MessageFormat (can be null)

defaultMessage - fallback default message

See Also:

rejectValue(String, String, Object[], String)

rejectValue

void rejectValue(@Nullable
                 String field,
                 String errorCode)

Register a field error for the specified field of the current object (respecting the current nested path, if any), using the given error description.

The field name may be null or empty String to indicate the current object itself rather than a field of it. This may result in a corresponding field error within the nested object graph or a global error if the current object is the top object.

Parameters:

field - the field name (may be null or empty String)

errorCode - error code, interpretable as a message key

See Also:

rejectValue(String, String, Object[], String)

rejectValue

void rejectValue(@Nullable
                 String field,
                 String errorCode,
                 String defaultMessage)

Register a field error for the specified field of the current object (respecting the current nested path, if any), using the given error description.

The field name may be null or empty String to indicate the current object itself rather than a field of it. This may result in a corresponding field error within the nested object graph or a global error if the current object is the top object.

Parameters:

field - the field name (may be null or empty String)

errorCode - error code, interpretable as a message key

defaultMessage - fallback default message

See Also:

rejectValue(String, String, Object[], String)

rejectValue

void rejectValue(@Nullable
                 String field,
                 String errorCode,
                 @Nullable
                 Object[] errorArgs,
                 @Nullable
                 String defaultMessage)

Register a field error for the specified field of the current object (respecting the current nested path, if any), using the given error description.

The field name may be null or empty String to indicate the current object itself rather than a field of it. This may result in a corresponding field error within the nested object graph or a global error if the current object is the top object.

Parameters:

field - the field name (may be null or empty String)

errorCode - error code, interpretable as a message key

errorArgs - error arguments, for argument binding via MessageFormat (can be null)

defaultMessage - fallback default message

See Also:

reject(String, Object[], String)

addAllErrors

void addAllErrors(Errors errors)

Add all errors from the given Errors instance to this Errors instance.

This is a convenience method to avoid repeated reject(..) calls for merging an Errors instance into another Errors instance.

Note that the passed-in Errors instance is supposed to refer to the same target object, or at least contain compatible errors that apply to the target object of this Errors instance.

Parameters:

errors - the Errors instance to merge in

See Also:

getAllErrors()

hasErrors

boolean hasErrors()

Determine if there were any errors.

See Also:

hasGlobalErrors(), hasFieldErrors()

getErrorCount

int getErrorCount()

Determine the total number of errors.

See Also:

getGlobalErrorCount(), getFieldErrorCount()

getAllErrors

List<ObjectError> getAllErrors()

Get all errors, both global and field ones.

Returns:

a list of ObjectError/FieldError instances

See Also:

getGlobalErrors(), getFieldErrors()

hasGlobalErrors

boolean hasGlobalErrors()

Determine if there were any global errors.

See Also:

hasFieldErrors()

getGlobalErrorCount

int getGlobalErrorCount()

Determine the number of global errors.

See Also:

getFieldErrorCount()

getGlobalErrors

List<ObjectError> getGlobalErrors()

Get all global errors.

Returns:

a list of ObjectError instances

See Also:

getFieldErrors()

getGlobalError

@Nullable
ObjectError getGlobalError()

Get the first global error, if any.

Returns:

the global error, or null

See Also:

getFieldError()

hasFieldErrors

boolean hasFieldErrors()

Determine if there were any errors associated with a field.

See Also:

hasGlobalErrors()

getFieldErrorCount

int getFieldErrorCount()

Determine the number of errors associated with a field.

See Also:

getGlobalErrorCount()

getFieldErrors

List<FieldError> getFieldErrors()

Get all errors associated with a field.

Returns:

a List of FieldError instances

See Also:

getGlobalErrors()

getFieldError

@Nullable
FieldError getFieldError()

Get the first error associated with a field, if any.

Returns:

the field-specific error, or null

See Also:

getGlobalError()

hasFieldErrors

boolean hasFieldErrors(String field)

Determine if there were any errors associated with the given field.

Parameters:

field - the field name

See Also:

hasFieldErrors()

getFieldErrorCount

int getFieldErrorCount(String field)

Determine the number of errors associated with the given field.

Parameters:

field - the field name

See Also:

getFieldErrorCount()

getFieldErrors

List<FieldError> getFieldErrors(String field)

Get all errors associated with the given field.

Implementations may support not only full field names like "address.street" but also pattern matches like "address.*".

Parameters:

field - the field name

Returns:

a List of FieldError instances

See Also:

getFieldErrors()

getFieldError

@Nullable
FieldError getFieldError(String field)

Get the first error associated with the given field, if any.

Parameters:

field - the field name

Returns:

the field-specific error, or null

See Also:

getFieldError()

getFieldValue

@Nullable
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.

Allows for convenient access to user-specified field values, even if there were type mismatches.

Parameters:

field - the field name

Returns:

the current value of the given field

See Also:

getFieldType(String)

getFieldType

@Nullable
Class<?> getFieldType(String field)

Determine the type of the given field, as far as possible.

Implementations should be able to determine the type even when the field value is null, for example from some associated descriptor.

Parameters:

field - the field name

Returns:

the type of the field, or null if not determinable

See Also:

getFieldValue(String)