org.richfaces.component

## Class AbstractPlaceholder

- java.lang.Object
- - javax.faces.component.UIComponent
  - - javax.faces.component.UIComponentBase
    - - javax.faces.component.UIOutput
      - - org.richfaces.component.AbstractPlaceholder

- All Implemented Interfaces:
    EventListener, javax.faces.component.PartialStateHolder, javax.faces.component.StateHolder, javax.faces.component.TransientStateHolder, javax.faces.component.ValueHolder, javax.faces.event.ComponentSystemEventListener, javax.faces.event.FacesListener, javax.faces.event.SystemEventListenerHolder, StyleClassProps
  Direct Known Subclasses:
    UIPlaceholder

      public abstract class AbstractPlaceholder
      extends javax.faces.component.UIOutput
      implements StyleClassProps

  Adds placeholder capability to HTML input and textarea elements. A placeholder typically appears as light gray text within an input or textarea element whenever the element is empty and does not have focus. This provides a hint to the user as to what the input or textarea element is used for, or the type of input that is required.

- - ### Field Summary

    Fields
    Modifier and Type | Field and Description
    --- | ---
    `static String` | `COMPONENT_FAMILY`
    `static String` | `COMPONENT_TYPE`

    - ### Fields inherited from class javax.faces.component.UIComponent

      `ATTRS_WITH_DECLARED_DEFAULT_VALUES, BEANINFO_KEY, bindings, COMPOSITE_COMPONENT_TYPE_KEY, COMPOSITE_FACET_NAME, CURRENT_COMPONENT, CURRENT_COMPOSITE_COMPONENT, FACETS_KEY, HONOR_CURRENT_COMPONENT_ATTRIBUTES_PARAM_NAME, VIEW_LOCATION_KEY`

  - ### Constructor Summary

    Constructors
    Constructor and Description
    `AbstractPlaceholder()`

  - ### Method Summary

    All Methods Instance Methods Abstract Methods Concrete Methods
    Modifier and Type | Method and Description
    --- | ---
    `abstract String` | `getSelector()` The jQuery selector used to filter which child DOM elements will be a placeholder attached to.
    `abstract Object` | `getValue()`
    `void` | `processEvent(javax.faces.event.ComponentSystemEvent event)` Registers component for processing before its parent component when it has empty selector - this logic is used as workaround for text components which does not render children (RF-12589).

    - ### Methods inherited from class javax.faces.component.UIOutput

      `clearInitialState, getConverter, getFamily, getLocalValue, markInitialState, restoreState, saveState, setConverter, setValue`

    - ### Methods inherited from class javax.faces.component.UIComponentBase

      `addClientBehavior, addFacesListener, broadcast, decode, encodeBegin, encodeChildren, encodeEnd, findComponent, getAttributes, getChildCount, getChildren, getClientBehaviors, getClientId, getDefaultEventName, getEventNames, getFacesContext, getFacesListeners, getFacet, getFacetCount, getFacets, getFacetsAndChildren, getId, getListenersForEventClass, getParent, getRenderer, getRendererType, getRendersChildren, getValueBinding, invokeOnComponent, isRendered, isTransient, processDecodes, processRestoreState, processSaveState, processUpdates, processValidators, queueEvent, removeFacesListener, restoreAttachedState, saveAttachedState, setId, setParent, setRendered, setRendererType, setTransient, setValueBinding, subscribeToEvent, unsubscribeFromEvent`

    - ### Methods inherited from class javax.faces.component.UIComponent

      `encodeAll, getClientId, getCompositeComponentParent, getContainerClientId, getCurrentComponent, getCurrentCompositeComponent, getNamingContainer, getResourceBundleMap, getStateHelper, getStateHelper, getTransientStateHelper, getTransientStateHelper, getValueExpression, initialStateMarked, isCompositeComponent, isInView, isVisitable, popComponentFromEL, pushComponentToEL, restoreTransientState, saveTransientState, setInView, setValueExpression, visitTree`

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

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

    - ### Methods inherited from interface org.richfaces.component.attribute.StyleClassProps

      `getStyleClass`

- - ### Field Detail

    - #### COMPONENT_FAMILY

          public static final String COMPONENT_FAMILY

      See Also:
        Constant Field Values

    - #### COMPONENT_TYPE

          public static final String COMPONENT_TYPE

      See Also:
        Constant Field Values

  - ### Constructor Detail

    - #### AbstractPlaceholder

          public AbstractPlaceholder()

  - ### Method Detail

    - #### getValue

          public abstract Object getValue()

      Specified by:
        `getValue` in interface `javax.faces.component.ValueHolder`
      Overrides:
        `getValue` in class `javax.faces.component.UIOutput`

    - #### getSelector

          public abstract String getSelector()

      The jQuery selector used to filter which child DOM elements will be a placeholder attached to.

    - #### processEvent

          public void processEvent(javax.faces.event.ComponentSystemEvent event)
                            throws javax.faces.event.AbortProcessingException

      Registers component for processing before its parent component when it has empty selector - this logic is used as workaround for text components which does not render children (RF-12589).
      Specified by:
        `processEvent` in interface `javax.faces.event.ComponentSystemEventListener`
      Overrides:
        `processEvent` in class `javax.faces.component.UIComponent`
      Throws:
        `javax.faces.event.AbortProcessingException`

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