org.apache.tapestry5

## Class ValidationTrackerImpl

- java.lang.Object
- - org.apache.tapestry5.BaseOptimizedSessionPersistedObject
  - - org.apache.tapestry5.ValidationTrackerImpl

- All Implemented Interfaces:
    Serializable, OptimizedSessionPersistedObject, ValidationTracker

      public final class ValidationTrackerImpl
      extends BaseOptimizedSessionPersistedObject
      implements ValidationTracker, Serializable

  Standard implementation of `ValidationTracker`. Works pretty hard to ensure a minimum amount of data is stored in the HttpSession.
  See Also:
    Serialized Form

- - ### Constructor Summary

    Constructors
    Constructor and Description
    `ValidationTrackerImpl()`

  - ### Method Summary

    All Methods Instance Methods Concrete Methods
    Modifier and Type | Method and Description
    --- | ---
    `void` | `clear()` Clears all information stored by the tracker.
    `String` | `getError(Field field)` Returns a previously recorded error message.
    `List<String>` | `getErrors()` Returns a list of all error messages.
    `boolean` | `getHasErrors()` Returns true if any field contains an error.
    `String` | `getInput(Field field)` Returns a previously recorded input value.
    `List<String>` | `getUnassociatedErrors()` Returns just the errors that are not associated with any fields.
    `boolean` | `inError(Field field)` For a given field, determines if the field is "in error", meaning that an error message has been previously recorded for the field.
    `void` | `recordError(Field field, String errorMessage)` Records an error message for a field.
    `void` | `recordError(String errorMessage)` Records an error message that is not associated with any specific field.
    `void` | `recordInput(Field field, String input)` Called by a field to record the exact input from the user, prior to any validation.

    - ### Methods inherited from class org.apache.tapestry5.BaseOptimizedSessionPersistedObject

      `checkAndResetDirtyMarker, markDirty`

    - ### Methods inherited from class java.lang.Object

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

- - ### Constructor Detail

    - #### ValidationTrackerImpl

          public ValidationTrackerImpl()

  - ### Method Detail

    - #### clear

          public void clear()

      Description copied from interface: `ValidationTracker`
      Clears all information stored by the tracker.
      Specified by:
        `clear` in interface `ValidationTracker`

    - #### getError

          public String getError(Field field)

      Description copied from interface: `ValidationTracker`
      Returns a previously recorded error message.
      Specified by:
        `getError` in interface `ValidationTracker`

    - #### getErrors

          public List<String> getErrors()

      Description copied from interface: `ValidationTracker`
      Returns a list of all error messages. The messages are stored in the order that they were added to the tracker, except that unassociated errors (unassociated with any field) are listed first.
      Specified by:
        `getErrors` in interface `ValidationTracker`

    - #### getUnassociatedErrors

          public List<String> getUnassociatedErrors()

      Description copied from interface: `ValidationTracker`
      Returns just the errors that are not associated with any fields.
      Specified by:
        `getUnassociatedErrors` in interface `ValidationTracker`

    - #### getHasErrors

          public boolean getHasErrors()

      Description copied from interface: `ValidationTracker`
      Returns true if any field contains an error.
      Specified by:
        `getHasErrors` in interface `ValidationTracker`

    - #### getInput

          public String getInput(Field field)

      Description copied from interface: `ValidationTracker`
      Returns a previously recorded input value.
      Specified by:
        `getInput` in interface `ValidationTracker`

    - #### inError

          public boolean inError(Field field)

      Description copied from interface: `ValidationTracker`
      For a given field, determines if the field is "in error", meaning that an error message has been previously recorded for the field.
      Specified by:
        `inError` in interface `ValidationTracker`
      Returns:
        true if an error message is present

    - #### recordError

          public void recordError(Field field,
                                  String errorMessage)

      Description copied from interface: `ValidationTracker`
      Records an error message for a field. The error message is primarily derived from a `ValidationException` thrown by a `Validator` or `Translator`.
      Specified by:
        `recordError` in interface `ValidationTracker`

    - #### recordError

          public void recordError(String errorMessage)

      Description copied from interface: `ValidationTracker`
      Records an error message that is not associated with any specific field. This often reflects some amount of cross-form validation.
      Specified by:
        `recordError` in interface `ValidationTracker`

    - #### recordInput

          public void recordInput(Field field,
                                  String input)

      Description copied from interface: `ValidationTracker`
      Called by a field to record the exact input from the user, prior to any validation. If the form is redisplayed (to present errors), the input value will be sent back to the user for correction.
      Specified by:
        `recordInput` in interface `ValidationTracker`
      Parameters:
        `field` - the field recording the input
        `input` - the value obtained from the forms submission

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