Package com.vaadin.flow.data.binder

Interface Binder.Binding<BEAN,TARGET>

Type Parameters:
BEAN - the bean type
TARGET - the target data type of the binding, matches the field type unless a converter has been set
All Superinterfaces:
Serializable
All Known Implementing Classes:
Binder.BindingImpl
Enclosing class:
Binder<BEAN>
public static interface Binder.Binding<BEAN,TARGET> extends Serializable
Represents the binding between a field and a data property.
See Also:

  • Method Summary

    Modifier and Type
    Method
    Description
    HasValue<?,?>
    getField()
    Gets the field the binding uses.
    ValueProvider<BEAN,TARGET>
    getGetter()
    Gets the getter associated with this Binding.
    Setter<BEAN,TARGET>
    getSetter()
    Gets the setter associated with this Binding.
    BindingValidationStatusHandler
    getValidationStatusHandler()
    Gets the validation status handler for this Binding.
    boolean
    hasChanges()
    Checks whether the field that the binding uses has uncommitted changes.
    boolean
    isAsRequiredEnabled()
    Returns whether asRequired validator is currently enabled or not.
    boolean
    isConvertBackToPresentation()
    Returns whether the value is converted back to the presentation in the field when a converter is used in binding.
    boolean
    isReadOnly()
    Gets the current read-only status for this Binding.
    boolean
    isValidatorsDisabled()
    Returns if validators are currently disabled or not.
    void
    read(BEAN bean)
    Reads the value from given item and stores it to the bound field.
    void
    setAsRequiredEnabled(boolean asRequiredEnabled)
    Enable or disable asRequired validator.
    void
    setConvertBackToPresentation(boolean convertBackToPresentation)
    Define whether the value should be converted back to the presentation in the field when a converter is used in binding.
    void
    setReadOnly(boolean readOnly)
    Sets the read-only status on for this Binding.
    void
    setValidatorsDisabled(boolean validatorsDisabled)
    Define whether validators are disabled or enabled for this specific binding.
    void
    unbind()
    Unbinds the binding from its respective Binder.
    default BindingValidationStatus<TARGET>
    validate()
    Validates the field value and returns a ValidationStatus instance representing the outcome of the validation.
    BindingValidationStatus<TARGET>
    validate(boolean fireEvent)
    Validates the field value and returns a ValidationStatus instance representing the outcome of the validation.

  • Method Details

    • getField

      HasValue<?,?> getField()
      Gets the field the binding uses.
      Returns:
      the field for the binding

    • validate

      default BindingValidationStatus<TARGET> validate()
      Validates the field value and returns a ValidationStatus instance representing the outcome of the validation. This method is a short-hand for calling validate(boolean) with fireEvent true.
      Returns:
      the validation result.
      See Also:

    • validate

      BindingValidationStatus<TARGET> validate(boolean fireEvent)
      Validates the field value and returns a ValidationStatus instance representing the outcome of the validation.
      Parameters:
      fireEvent - true to fire status event; false to not
      Returns:
      the validation result.
      See Also:

    • getValidationStatusHandler

      BindingValidationStatusHandler getValidationStatusHandler()
      Gets the validation status handler for this Binding.
      Returns:
      the validation status handler for this binding

    • unbind

      void unbind()
      Unbinds the binding from its respective Binder. Removes any ValueChangeListener Registration from associated HasValue.

    • read

      void read(BEAN bean)
      Reads the value from given item and stores it to the bound field.
      Parameters:
      bean - the bean to read from

    • setReadOnly

      void setReadOnly(boolean readOnly)
      Sets the read-only status on for this Binding. Setting a Binding read-only will mark the field read-only and not write any values from the fields to the bean.

      This helper method is the preferred way to control the read-only state of the bound field.

      Parameters:
      readOnly - true to set binding read-only; false to enable writes
      Throws:
      IllegalStateException - if trying to make binding read-write and the setter is null

    • isReadOnly

      boolean isReadOnly()
      Gets the current read-only status for this Binding.
      Returns:
      true if read-only; false if not
      See Also:

    • getGetter

      ValueProvider<BEAN,TARGET> getGetter()
      Gets the getter associated with this Binding.
      Returns:
      the getter

    • getSetter

      Setter<BEAN,TARGET> getSetter()
      Gets the setter associated with this Binding.
      Returns:
      the setter

    • setAsRequiredEnabled

      void setAsRequiredEnabled(boolean asRequiredEnabled)
      Enable or disable asRequired validator. The validator is enabled by default.
      Parameters:
      asRequiredEnabled - false if asRequired validator should be disabled, true otherwise (default)
      See Also:

    • isAsRequiredEnabled

      boolean isAsRequiredEnabled()
      Returns whether asRequired validator is currently enabled or not.
      Returns:
      false if asRequired validator is disabled true otherwise (default)
      See Also:

    • setValidatorsDisabled

      void setValidatorsDisabled(boolean validatorsDisabled)
      Define whether validators are disabled or enabled for this specific binding.
      Parameters:
      validatorsDisabled - A boolean value.

    • isValidatorsDisabled

      boolean isValidatorsDisabled()
      Returns if validators are currently disabled or not.
      Returns:
      A boolean value.

    • setConvertBackToPresentation

      void setConvertBackToPresentation(boolean convertBackToPresentation)
      Define whether the value should be converted back to the presentation in the field when a converter is used in binding.

      As of version 6.0, when a converter is used on a binding and the user input value is modified by the converter, the value from the converter is applied back to the input. It is possible to control this behavior with this API.

      Parameters:
      convertBackToPresentation - A boolean value
      See Also:

    • isConvertBackToPresentation

      boolean isConvertBackToPresentation()
      Returns whether the value is converted back to the presentation in the field when a converter is used in binding.
      Returns:
      A boolean value

    • hasChanges

      boolean hasChanges()
      Checks whether the field that the binding uses has uncommitted changes.
      Returns:
      true if the field the binding uses has uncommitted changes, otherwise false.
      Throws:
      IllegalStateException - if the binding is no longer attached to a Binder.