Package com.vaadin.data

Class ReadOnlyHasValue<V>

  • Type Parameters:
    V - the value type
    All Implemented Interfaces:
    HasValue<V>, Serializable
    public class ReadOnlyHasValue<V>
extends Object
implements HasValue<V>, Serializable
    Generic HasValue to use any type of component with Vaadin data binding.

    Example: 

     Label label = new Label();
 ReadOnlyHasValue<String> hasValue = new ReadOnlyHasValue<>(
         label::setCaption);
 binder.forField(hasValue).bind(SomeBean::getName);
    Since:
    8.4
    See Also:
    Serialized Form

    • Method Detail

      • setValue

        public void setValue​(V value)
        Description copied from interface: HasValue
        Sets the value of this object. If the new value is not equal to getValue(), fires a value change event. May throw IllegalArgumentException if the value is not acceptable.

        Implementation note: the implementing class should document whether null values are accepted or not.

        Specified by:
        setValue in interface HasValue<V>
        Parameters:
        value - the new value

      • getValue

        public V getValue()
        Description copied from interface: HasValue
        Returns the current value of this object.

        Implementation note: the implementing class should document whether null values may be returned or not.

        Specified by:
        getValue in interface HasValue<V>
        Returns:
        the current value

      • addValueChangeListener

        public Registration addValueChangeListener​(HasValue.ValueChangeListener<V> listener)
        Description copied from interface: HasValue
        Adds a value change listener. The listener is called when the value of this HasValue is changed either by the user or programmatically.
        Specified by:
        addValueChangeListener in interface HasValue<V>
        Parameters:
        listener - the value change listener, not null
        Returns:
        a registration for the listener

      • isRequiredIndicatorVisible

        public boolean isRequiredIndicatorVisible()
        Description copied from interface: HasValue
        Checks whether the required indicator is visible.
        Specified by:
        isRequiredIndicatorVisible in interface HasValue<V>
        Returns:
        true if visible, false if not

      • setRequiredIndicatorVisible

        public void setRequiredIndicatorVisible​(boolean requiredIndicatorVisible)
        Description copied from interface: HasValue
        Sets the required indicator visible or not.

        If set visible, it is visually indicated in the user interface.

        Specified by:
        setRequiredIndicatorVisible in interface HasValue<V>
        Parameters:
        requiredIndicatorVisible - true to make the required indicator visible, false if not

      • setReadOnly

        public void setReadOnly​(boolean readOnly)
        Description copied from interface: HasValue
        Sets the read-only mode of this HasValue to given mode. The user can't change the value when in read-only mode.

        A HasValue with a visual component in read-only mode typically looks visually different to signal to the user that the value cannot be edited.

        Specified by:
        setReadOnly in interface HasValue<V>
        Parameters:
        readOnly - a boolean value specifying whether the component is put read-only mode or not

      • isReadOnly

        public boolean isReadOnly()
        Description copied from interface: HasValue
        Returns whether this HasValue is in read-only mode or not.
        Specified by:
        isReadOnly in interface HasValue<V>
        Returns:
        false if the user can modify the value, true if not.