PartialViewContext (Jakarta EE 8 Specification APIs)

java.lang.Object
- javax.faces.context.PartialViewContext

Direct Known Subclasses:

PartialViewContextWrapper
```
public abstract class PartialViewContext
extends Object
```
PartialViewContext contains methods and properties that pertain to partial request processing and partial response rendering on a view.

The PartialViewContext instance is used to determine if the current request indicates the requirement to perform partial processing and/or partial rendering. Partial processing is the processing of selected components through the execute portion of the request processing lifecycle. Partial rendering is the rendering of specified components in the Render Response Phase of the request processing lifecycle.

Field Summary

Fields
Modifier and Type	Field and Description
`static String`	`ALL_PARTIAL_PHASE_CLIENT_IDS` The value that when used with `PARTIAL_EXECUTE_PARAM_NAME` or `PARTIAL_RENDER_PARAM_NAME` indicates these phases must be skipped.
`static String`	`PARTIAL_EVENT_PARAM_NAME` The request parameter name whose request parameter value identifies the type of partial event.
`static String`	`PARTIAL_EXECUTE_PARAM_NAME` The request parameter name whose request parameter value is a `Collection` of client identifiers identifying the components that must be processed during the Apply Request Values, Process Validations, and Update Model Values phases of the request processing lifecycle.
`static String`	`PARTIAL_RENDER_PARAM_NAME` The request parameter name whose request parameter value is a `Collection` of client identifiers identifying the components that must be processed during the Render Response phase of the request processing lifecycle.
`static String`	`RESET_VALUES_PARAM_NAME` If the request parameter named by the value of this constant has a parameter value of `true`, the implementation must return `true` from `isResetValues()`.

Constructor Summary

Constructors
Constructor and Description

PartialViewContext()

Constructors
Constructor and Description
`PartialViewContext()`

Method Summary

All Methods Instance Methods Abstract Methods Concrete Methods
Modifier and Type	Method and Description
`abstract List<String>`	`getEvalScripts()` Returns a mutable `List` of scripts to be evaluated in client side on complete of ajax request.
`abstract Collection<String>`	`getExecuteIds()` Return a `Collection` of client identifiers from the current request with the request parameter name `PARTIAL_EXECUTE_PARAM_NAME`.
`abstract PartialResponseWriter`	`getPartialResponseWriter()` Return the `ResponseWriter` to which components should direct their output for partial view rendering.
`abstract Collection<String>`	`getRenderIds()` Return a `Collection` of client identifiers from the current request with the request parameter name `PARTIAL_RENDER_PARAM_NAME`.
`abstract boolean`	`isAjaxRequest()` Return `true` if the request header `Faces-Request` is present with the value `partial/ajax`.
`abstract boolean`	`isExecuteAll()` Return `true` if `isAjaxRequest()` returns `true` and `PARTIAL_EXECUTE_PARAM_NAME` is present in the current request with the value `ALL_PARTIAL_PHASE_CLIENT_IDS`.
`abstract boolean`	`isPartialRequest()` Return `true` `isAjaxRequest()` returns `true` or if the request header `Faces-Request` is present with the value `partial/process`.
`abstract boolean`	`isRenderAll()` Return `true` if `isAjaxRequest()` returns `true` and `PARTIAL_RENDER_PARAM_NAME` is present in the current request with the value `ALL_PARTIAL_PHASE_CLIENT_IDS`.
`boolean`	`isResetValues()` Return `true` if the incoming request has a parameter named by the value of `RESET_VALUES_PARAM_NAME` and that value is `true`.
`abstract void`	`processPartial(PhaseId phaseId)` Perform lifecycle processing on components during the indicated `phaseId`.
`abstract void`	`release()` Release any resources associated with this `PartialViewContext` instance.
`abstract void`	`setPartialRequest(boolean isPartialRequest)` Dynamically indicate that this is a partial request.
`abstract void`	`setRenderAll(boolean renderAll)` Indicate the entire view must be rendered if `renderAll` is `true`.

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Field Detail
  - PARTIAL_EVENT_PARAM_NAME
```
public static final String PARTIAL_EVENT_PARAM_NAME
```
    The request parameter name whose request parameter value identifies the type of partial event.
    
    Since:
    
    2.3
    
    See Also:
    
    Constant Field Values
  - PARTIAL_RENDER_PARAM_NAME
```
public static final String PARTIAL_RENDER_PARAM_NAME
```
    The request parameter name whose request parameter value is a Collection of client identifiers identifying the components that must be processed during the Render Response phase of the request processing lifecycle.
    
    Since:
    
    2.0
    
    See Also:
    
    Constant Field Values
  - PARTIAL_EXECUTE_PARAM_NAME
```
public static final String PARTIAL_EXECUTE_PARAM_NAME
```
    The request parameter name whose request parameter value is a Collection of client identifiers identifying the components that must be processed during the Apply Request Values, Process Validations, and Update Model Values phases of the request processing lifecycle.
    
    Since:
    
    2.0
    
    See Also:
    
    Constant Field Values
  - RESET_VALUES_PARAM_NAME
```
public static final String RESET_VALUES_PARAM_NAME
```
    If the request parameter named by the value of this constant has a parameter value of true, the implementation must return true from isResetValues().
    
    Since:
    
    2.2
    
    See Also:
    
    Constant Field Values
  - ALL_PARTIAL_PHASE_CLIENT_IDS
```
public static final String ALL_PARTIAL_PHASE_CLIENT_IDS
```
    The value that when used with PARTIAL_EXECUTE_PARAM_NAME or PARTIAL_RENDER_PARAM_NAME indicates these phases must be skipped.
    
    Since:
    
    2.0
    
    See Also:
    
    Constant Field Values
- Constructor Detail
  - PartialViewContext
```
public PartialViewContext()
```
- Method Detail
  - getExecuteIds
```
public abstract Collection<String> getExecuteIds()
```
    Return a Collection of client identifiers from the current request with the request parameter name PARTIAL_EXECUTE_PARAM_NAME. If there is no such request parameter, return an empty Collection. These client identifiers are used to identify components that will be processed during the execute phase of the request processing lifecycle. The returned Collection is mutable.
    
    Returns:
    
    the ids for the execute portion of the lifecycle
    
    Throws:
    
    IllegalStateException - if this method is called after this instance has been released
    
    Since:
    
    2.0
  - getRenderIds
```
public abstract Collection<String> getRenderIds()
```
    Return a Collection of client identifiers from the current request with the request parameter name PARTIAL_RENDER_PARAM_NAME. If there is no such request parameter, return an empty Collection. These client identifiers are used to identify components that will be processed during the render phase of the request processing lifecycle. The returned Collection is mutable.
    
    Returns:
    
    the ids for the render portion of the lifecycle
    
    Throws:
    
    IllegalStateException - if this method is called after this instance has been released
    
    Since:
    
    2.0
  - getEvalScripts
```
public abstract List<String> getEvalScripts()
```
    Returns a mutable List of scripts to be evaluated in client side on complete of ajax request.
    
    Returns:
    
    A mutable List of scripts to be evaluated in client side on complete of ajax request.
    
    Throws:
    
    IllegalStateException - If this method is called after this instance has been released.
    
    Since:
    
    2.3
  - getPartialResponseWriter
```
public abstract PartialResponseWriter getPartialResponseWriter()
```
    Return the ResponseWriter to which components should direct their output for partial view rendering. Within a given response, components can use either the ResponseStream or the ResponseWriter, but not both.
    
    Returns:
    
    the ResponseWriter for output
    
    Throws:
    
    IllegalStateException - if this method is called after this instance has been released
    
    Since:
    
    2.0
  - isAjaxRequest
```
public abstract boolean isAjaxRequest()
```
    Return true if the request header Faces-Request is present with the value partial/ajax. Otherwise, return false.
    
    Returns:
    
    whether or not this is an ajax request
    
    Throws:
    
    IllegalStateException - if this method is called after this instance has been released
    
    Since:
    
    2.0
  - isPartialRequest
```
public abstract boolean isPartialRequest()
```
    Return true isAjaxRequest() returns true or if the request header Faces-Request is present with the value partial/process. Otherwise, return false.
    
    Returns:
    
    whether or not this request is partial
    
    Throws:
    
    IllegalStateException - if this method is called after this instance has been released
    
    Since:
    
    2.0
  - isExecuteAll
```
public abstract boolean isExecuteAll()
```
    Return true if isAjaxRequest() returns true and PARTIAL_EXECUTE_PARAM_NAME is present in the current request with the value ALL_PARTIAL_PHASE_CLIENT_IDS. Otherwise, return false.
    
    Returns:
    
    whether or not this is an execute all request
    
    Throws:
    
    IllegalStateException - if this method is called after this instance has been released
    
    Since:
    
    2.0
  - isRenderAll
```
public abstract boolean isRenderAll()
```
    Return true if isAjaxRequest() returns true and PARTIAL_RENDER_PARAM_NAME is present in the current request with the value ALL_PARTIAL_PHASE_CLIENT_IDS. Otherwise, return false.
    
    Returns:
    
    whether or not this is a render all request
    
    Throws:
    
    IllegalStateException - if this method is called after this instance has been released
    
    Since:
    
    2.0
  - isResetValues
```
public boolean isResetValues()
```
    Return true if the incoming request has a parameter named by the value of RESET_VALUES_PARAM_NAME and that value is true. To preserve backward compatibility with custom implementations that may have extended from an earlier version of this class, an implementation is provided that returns false. A compliant implementation must override this method to take the specified action.
    
    Returns:
    
    whether or not this is a reset values request
    
    Since:
    
    2.2
  - setRenderAll
```
public abstract void setRenderAll(boolean renderAll)
```
    Indicate the entire view must be rendered if renderAll is true.
    
    Parameters:
    
    renderAll - the value true indicates the entire view must be rendered.
    
    Throws:
    
    IllegalStateException - if this method is called after this instance has been released
    
    Since:
    
    2.0
  - setPartialRequest
```
public abstract void setPartialRequest(boolean isPartialRequest)
```
    Dynamically indicate that this is a partial request.
    
    Parameters:
    
    isPartialRequest - the value true indicates this is a partial request.
    
    Throws:
    
    IllegalStateException - if this method is called after this instance has been released
    
    Since:
    
    2.0
  - release
```
public abstract void release()
```
    Release any resources associated with this PartialViewContext instance.
    
    Throws:
    
    IllegalStateException - if this method is called after this instance has been released
  - processPartial
```
public abstract void processPartial(PhaseId phaseId)
```
    Perform lifecycle processing on components during the indicated phaseId. Only those components with identifiers existing in the Collection returned from getExecuteIds() and getRenderIds() will be processed.
    When the indicated phaseId equals PhaseId.RENDER_RESPONSE, then perform the following tasks in sequence:
    If isResetValues() returns true, then call UIViewRoot.resetValues(FacesContext, Collection), passing getRenderIds().
    
    If isRenderAll() returns false, then render any component resource of UIViewRoot whose ResourceHandler.getRendererTypeForResourceName(String) does not return null, and whose UIComponent.getChildCount() is zero, and whose ResourceHandler.isResourceRendered(FacesContext, String, String) returns false, in an update element with an identifier of javax.faces.Resource.
    
    Process the components.
    
    Obtain the state by calling StateManager.getViewState(javax.faces.context.FacesContext) and write it out as an update element with an identifier of <VIEW_ROOT_CONTAINER_CLIENT_ID><SEP>javax.faces.ViewState where <VIEW_ROOT_CONTAINER_CLIENT_ID> is the return from UIComponent.getContainerClientId(FacesContext) on the view from whence this state originated, and <SEP> is the currently configured UINamingContainer.getSeparatorChar(FacesContext).
    
    If isRenderAll() returns false, then write out each script of getEvalScripts() as an eval element.
    Parameters:
    
    phaseId - the PhaseId that indicates the lifecycle phase the components will be processed in.

Class PartialViewContext

Field Summary

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Field Detail

PARTIAL_EVENT_PARAM_NAME

PARTIAL_RENDER_PARAM_NAME

PARTIAL_EXECUTE_PARAM_NAME

RESET_VALUES_PARAM_NAME

ALL_PARTIAL_PHASE_CLIENT_IDS

Constructor Detail

PartialViewContext

Method Detail

getExecuteIds

getRenderIds

getEvalScripts

getPartialResponseWriter

isAjaxRequest

isPartialRequest

isExecuteAll

isRenderAll

isResetValues

setRenderAll

setPartialRequest

release

processPartial