程序包 cn.taketoday.validation

接口 Errors

所有已知子接口:
BindingResult
所有已知实现类:
AbstractBindingResult, AbstractErrors, AbstractPropertyBindingResult, BeanPropertyBindingResult, BindException, DirectFieldBindingResult, MapBindingResult
public interface Errors
Stores and exposes information about data-binding and validation errors for a specific object.

Field names can be properties of the target 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(String): for example, an AddressValidator validates "address", not being aware that this is a subobject of customer.

Note: Errors objects are single-threaded.

从以下版本开始:
4.0
作者:
Rod Johnson, Juergen Hoeller
另请参阅:

  • 字段详细资料

    • 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.

      另请参阅:

  • 方法详细资料

    • 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.

      参数:
      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

      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.

    • 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.

      参数:
      subPath - the sub path to push onto the nested path stack
      另请参阅:

    • popNestedPath

      void popNestedPath() throws IllegalStateException
      Pop the former nested path from the nested path stack.
      抛出:
      IllegalStateException - if there is no former nested path on the stack
      另请参阅:

    • reject

      void reject(String errorCode)
      Register a global error for the entire target object, using the given error description.
      参数:
      errorCode - error code, interpretable as a message key

    • reject

      void reject(String errorCode, String defaultMessage)
      Register a global error for the entire target object, using the given error description.
      参数:
      errorCode - error code, interpretable as a message key
      defaultMessage - fallback default message

    • 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.
      参数:
      errorCode - error code, interpretable as a message key
      errorArgs - error arguments, for argument binding via MessageFormat (can be null)
      defaultMessage - fallback default message

    • 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.

      参数:
      field - the field name (may be null or empty String)
      errorCode - error code, interpretable as a message key
      另请参阅:

    • 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.

      参数:
      field - the field name (may be null or empty String)
      errorCode - error code, interpretable as a message key
      defaultMessage - fallback default message
      另请参阅:

    • 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.

      参数:
      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
      另请参阅:

    • 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.

      参数:
      errors - the Errors instance to merge in

    • hasErrors

      boolean hasErrors()
      Return if there were any errors.

    • getErrorCount

      int getErrorCount()
      Return the total number of errors.

    • getAllErrors

      List<ObjectError> getAllErrors()
      Get all errors, both global and field ones.
      返回:
      a list of ObjectError instances

    • hasGlobalErrors

      boolean hasGlobalErrors()
      Are there any global errors?
      返回:
      true if there are any global errors
      另请参阅:

    • getGlobalErrorCount

      int getGlobalErrorCount()
      Return the number of global errors.
      返回:
      the number of global errors
      另请参阅:

    • getGlobalErrors

      List<ObjectError> getGlobalErrors()
      Get all global errors.
      返回:
      a list of ObjectError instances

    • getGlobalError

      @Nullable ObjectError getGlobalError()
      Get the first global error, if any.
      返回:
      the global error, or null

    • hasFieldErrors

      boolean hasFieldErrors()
      Are there any field errors?
      返回:
      true if there are any errors associated with a field
      另请参阅:

    • getFieldErrorCount

      int getFieldErrorCount()
      Return the number of errors associated with a field.
      返回:
      the number of errors associated with a field
      另请参阅:

    • getFieldErrors

      List<FieldError> getFieldErrors()
      Get all errors associated with a field.
      返回:
      a List of FieldError instances

    • getFieldError

      @Nullable FieldError getFieldError()
      Get the first error associated with a field, if any.
      返回:
      the field-specific error, or null

    • hasFieldErrors

      boolean hasFieldErrors(String field)
      Are there any errors associated with the given field?
      参数:
      field - the field name
      返回:
      true if there were any errors associated with the given field

    • getFieldErrorCount

      int getFieldErrorCount(String field)
      Return the number of errors associated with the given field.
      参数:
      field - the field name
      返回:
      the number of errors associated with the given field

    • getFieldErrors

      List<FieldError> getFieldErrors(String field)
      Get all errors associated with the given field.

      Implementations should support not only full field names like "name" but also pattern matches like "na*" or "address.*".

      参数:
      field - the field name
      返回:
      a List of FieldError instances

    • getFieldError

      @Nullable FieldError getFieldError(String field)
      Get the first error associated with the given field, if any.
      参数:
      field - the field name
      返回:
      the field-specific error, or null

    • 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.

      参数:
      field - the field name
      返回:
      the current value of the given field

    • getFieldType

      @Nullable Class<?> getFieldType(String field)
      Return the type of a given field.

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

      参数:
      field - the field name
      返回:
      the type of the field, or null if not determinable