com.ibm.xsp.util
Class FacesUtil

java.lang.Object
  com.ibm.xsp.util.FacesUtil

public class FacesUtil
extends java.lang.Object

This class provides various utility methods.

Field Summary

static java.lang.String	DATASOURCE Deprecated. Use DataPublisher.DATASOURCE instead
static java.lang.String	DEFAULT_DATASOURCE
static java.lang.String	HIDDEN_FIELD_ID
static java.lang.String	RESTORE_ROOT

Constructor Summary

FacesUtil()

Method Summary

static void	addErrorMessage(java.lang.String summary, java.lang.String detail) Add an error FacesMessage to the current context.
static void	addMessage(javax.faces.context.FacesContext context, javax.faces.application.FacesMessage.Severity severity, java.lang.String clientId, java.lang.String summary, java.lang.String detail) Add a FacesMessage to the specified context.
static void	addMessage(javax.faces.context.FacesContext context, javax.faces.component.UIComponent component, javax.faces.application.FacesMessage.Severity severity, java.lang.String summary, java.lang.String detail) Add a FacesMessage to the specified context.
static void	addMessage(javax.faces.context.FacesContext context, javax.faces.component.UIComponent component, java.lang.String summary, java.lang.Throwable t) Add a FacesMessage to the specified context.
static void	addMessage(javax.faces.application.FacesMessage.Severity severity, java.lang.String summary, java.lang.String detail) Add a FacesMessage to the specified context.
static java.util.List<java.lang.String>	calculateBundleNames(java.lang.String baseName, java.util.Locale locale) Calculate bundle names to be loaded
static boolean	canSerializeObject(java.lang.Object data) Returns true if this data can be saved using objectToSerializable.
static void	checkComponentIds(javax.faces.component.UIViewRoot viewRoot, javax.faces.component.UIComponent base) Recursively set unique ids for every component starting at the specified one.
static void	checkForNestedForms(java.lang.String viewId, javax.faces.component.UIComponent component, boolean hasParentForm) Check for nested forms
static void	checkForNonSelectChildren(javax.faces.component.UIComponent component) Throw an exception if any children are invalid
static boolean	containsForm(javax.faces.component.UIComponent component) Check if this component is a form or if it contains one
static java.lang.String	convertValue(javax.faces.context.FacesContext context, javax.faces.component.UIComponent component) Format the value of a component.
static java.lang.String	createId() Utility method for generating a unique ID.
static javax.faces.component.UIComponent	findChildComponent(javax.faces.component.UIComponent component, java.lang.String id) Return the component with the specified id.
static javax.faces.component.UIComponent	findComponentWithFullId(javax.faces.component.UIViewRoot root, java.lang.String id) Return the UIComponent with the specified id, starting from the root.
static javax.faces.component.UIComponent	findRestoreComponent(javax.faces.context.FacesContext context, java.lang.String restoreId)
static javax.faces.component.UIComponent	getComponentFor(javax.faces.component.UIComponent start, java.lang.String id) Return the UIComponent with the specified id, starting from a particular component.
static javax.faces.convert.Converter	getConverterForClass(java.lang.Class<?> clazz) Create a converter for the specified class
static javax.faces.component.UIForm	getForm(javax.faces.component.UIComponent component) Return the parent UIForm component for the specified component.
static java.lang.String	getFullId(javax.faces.component.UIComponent c) Get the full id of a component.
static java.lang.String	getHiddenExecId()
static java.lang.String	getHiddenExecValue(javax.faces.context.FacesContext context)
static java.lang.String	getHiddenFieldId() Gets the id of the form's hidden field containing the ID of the control that submits the event.
static java.lang.String	getHiddenFieldValue(javax.faces.context.FacesContext context)
static javax.faces.lifecycle.Lifecycle	getLifecycle(javax.faces.context.FacesContext context) Return the Lifecycle for the specified FacesContext.
static javax.faces.component.NamingContainer	getNamingContainer(javax.faces.component.UIComponent component) Find the parent NamingContainer for the specified component.
static javax.faces.component.NamingContainer	getNamingContainer(javax.faces.component.UIComponent component, int skip) Find the parent NamingContainer for the specified component skipping the specified number of naming containers.
static java.lang.String	getRealViewId(java.lang.String viewId) Perform any required transformation of the view id
static javax.faces.render.Renderer	getRenderer(javax.faces.context.FacesContext context, java.lang.String family, java.lang.String rendererType) Return the renderer associated with this component or null if there is none.
static javax.faces.render.Renderer	getRendererAs(javax.faces.render.Renderer renderer, java.lang.Class<?> toImplement) Used to find whether the renderer or any of it's delegates implements a certain interface, and if so returns the renderer or delegate.
static java.lang.Object	getRequestObject(javax.faces.context.FacesContext context, java.lang.String name) Return the named object from the request map.
static java.lang.Object	getRequestObject(java.lang.String name) Return the named object from the request map.
static java.lang.Object	getRequestParameter(java.lang.String name) Return the specified value from the request map if it exists.
static RequestParameters	getRequestParameters(javax.faces.context.FacesContext ctx) Get the Request Customizer associayed with a FacesContext returns null if no customizer is available
static java.io.InputStream	getResourceAsStream(java.lang.Class<?> clazz, java.lang.String name) Open an input stream to the named resource
static java.lang.String	getRestoreId(javax.faces.context.FacesContext context, javax.faces.component.UIComponent component)
static java.util.List<javax.faces.model.SelectItem>	getSelectItems(javax.faces.component.UIComponent component) Return list of SelectItem instances associated with the specified component
static StyleKit	getStyleKit(javax.faces.context.FacesContext ctx) Get the stylekit used by the request.
static java.lang.Object	getValue(javax.faces.context.FacesContext context, javax.faces.component.UIComponent component) Get the value of a component.
static javax.faces.component.UIViewRoot	getViewRoot(javax.faces.component.UIComponent component) Return the UIViewRoot for the specified component.
static boolean	hasMessage(javax.faces.context.FacesContext context, java.lang.String summary) Helper method to determine if the FacesContext contains a message with the specified summary.
static boolean	hasStyleSheet(UIViewRootEx viewRoot) Return true if the view root contains any style sheet resource
static boolean	hasStyleSheet(UIViewRootEx viewRoot, java.lang.String href) Return true if the view root contains a style sheet resource matching the href
static boolean	isAbsoluteUrl(java.lang.String url) The following are examples of absolute URLs: http://host:80/path ftp://user:pw@host:port/path news:a.news.group file:/c:/config.sys mailto:alasdair@domain.tld This method does not provide a comprehensive test for all URL cases, but should suffice for most.
static boolean	isCancelled(java.lang.Object value) Static method to return true if the specified value indicates the operation been canceled.
static boolean	isChecked(java.lang.Object value) Return the checked state of the submitted value
static boolean	isClientId(javax.faces.context.FacesContext context, java.lang.String id) Check if an id is a client id
static boolean	isClientIdChildOf(FacesContextEx context, javax.faces.component.UIComponent component, java.lang.String targetId) Check if a component is a child of another, based on its client id.
static boolean	isComponentReadOnly(javax.faces.context.FacesContext context, javax.faces.component.UIComponent component) Test if the specified component should be in a read-only state.
static boolean	isDecodeable(javax.faces.component.UIComponent component) Return true if this component can be decoded
static boolean	isDuplicateMessage(javax.faces.application.FacesMessage.Severity severity, java.lang.String summary, java.lang.String detail, javax.faces.application.FacesMessage message)
static boolean	isEditable(javax.faces.component.UIComponent component) Return true if this component is editable
static java.lang.String	makeUrlAbsolute(javax.faces.context.FacesContext context, java.lang.String path)
static java.lang.String	normalizePageName(javax.faces.context.FacesContext context, java.lang.String name) Normalize the page name if it is a relative page.
static java.lang.Object	objectFromSerializable(javax.faces.context.FacesContext context, java.lang.Object serForm)
static java.lang.Object	objectFromSerializable(javax.faces.context.FacesContext context, javax.faces.component.UIComponent src, java.lang.Object serForm)
static java.lang.Object	objectToSerializable(javax.faces.context.FacesContext context, java.lang.Object data) Utility method for serializing data.
static java.util.List<?>	removeNonSelectItemChildren(javax.faces.component.UIComponent component) Remove any children of the component which are not UISelectItem or UISelectItems instances
static void	renderChildren(javax.faces.context.FacesContext context, javax.faces.component.UIComponent component) Render the children of a specified component
static void	renderComponent(javax.faces.context.FacesContext context, javax.faces.component.UIComponent component) Render the specified component and its children
static java.lang.Object	resolveRequestMapVariable(javax.faces.context.FacesContext context, java.lang.String name)
static java.lang.Object	resolveVariable(javax.faces.context.FacesContext context, java.lang.String name) Resolve the named variable
static void	restoreNonSelectItemChildren(javax.faces.component.UIComponent component, java.util.List<?> removed) Restore any children of the component which are not UISelectItem or UISelectItems instances
static boolean	save(javax.faces.context.FacesContext context, DataSource dataSource, boolean removeFromManager) Save the specified component data if it's is not read only
static boolean	save(javax.faces.context.FacesContext context, javax.faces.component.UIComponent component, boolean removeFromManager) Save all data associated with the specified component and it's children
static void	serviceFacesRequest(com.ibm.xsp.controller.FacesController controller, java.lang.Object request, java.lang.Object response, java.lang.Object containerContext, javax.faces.component.UIViewRoot viewRoot) Execute the lifecycle and render the response for the specified request.
static void	setRestoreRoot(javax.faces.context.FacesContext context, javax.faces.component.UIViewRoot viewRoot)
static java.lang.String	toString(javax.faces.component.UIComponent component) Return a string representation of the specified component tree.

Methods inherited from class java.lang.Object

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

Field Detail

DEFAULT_DATASOURCE

public static final java.lang.String DEFAULT_DATASOURCE

See Also:

Constant Field Values

DATASOURCE

public static final java.lang.String DATASOURCE

Deprecated. Use DataPublisher.DATASOURCE instead

See Also:

Constant Field Values

HIDDEN_FIELD_ID

public static final java.lang.String HIDDEN_FIELD_ID

See Also:

Constant Field Values

RESTORE_ROOT

public static final java.lang.String RESTORE_ROOT

See Also:

Constant Field Values

Constructor Detail

FacesUtil

public FacesUtil()

Method Detail

serviceFacesRequest

public static void serviceFacesRequest(com.ibm.xsp.controller.FacesController controller,
                                       java.lang.Object request,
                                       java.lang.Object response,
                                       java.lang.Object containerContext,
                                       javax.faces.component.UIViewRoot viewRoot)

Execute the lifecycle and render the response for the specified request.

Parameters:

controller -

request -

response -

viewRoot -

getRealViewId

public static java.lang.String getRealViewId(java.lang.String viewId)

Perform any required transformation of the view id

getFullId

public static java.lang.String getFullId(javax.faces.component.UIComponent c)

Get the full id of a component. The full id of a component comprises its own id and the ids of its parents that are naming containers. This allows a component to be uniquely identified in a hierarchy.

getForm

public static javax.faces.component.UIForm getForm(javax.faces.component.UIComponent component)

Return the parent UIForm component for the specified component.

isClientId

public static boolean isClientId(javax.faces.context.FacesContext context,
                                 java.lang.String id)

Check if an id is a client id

findComponentWithFullId

public static javax.faces.component.UIComponent findComponentWithFullId(javax.faces.component.UIViewRoot root,
                                                                        java.lang.String id)

Return the UIComponent with the specified id, starting from the root. This functions stops at the first component with this id, or full id. The full id of a component is comprised of its own id, plus the ids of its parents that are naming containers. See FacesUtil#getFullId.

Parameters:

root - the root component of the page to start from

id - th id (or full id) of the component top search

Returns:

the component found, null if none

findChildComponent

public static javax.faces.component.UIComponent findChildComponent(javax.faces.component.UIComponent component,
                                                                   java.lang.String id)

Return the component with the specified id.

getComponentFor

public static javax.faces.component.UIComponent getComponentFor(javax.faces.component.UIComponent start,
                                                                java.lang.String id)

Return the UIComponent with the specified id, starting from a particular component.

isClientIdChildOf

public static boolean isClientIdChildOf(FacesContextEx context,
                                        javax.faces.component.UIComponent component,
                                        java.lang.String targetId)

Check if a component is a child of another, based on its client id.

Parameters:

context -

component -

Returns:

getViewRoot

public static javax.faces.component.UIViewRoot getViewRoot(javax.faces.component.UIComponent component)

Return the UIViewRoot for the specified component.

getLifecycle

public static javax.faces.lifecycle.Lifecycle getLifecycle(javax.faces.context.FacesContext context)

Return the Lifecycle for the specified FacesContext.

getNamingContainer

public static javax.faces.component.NamingContainer getNamingContainer(javax.faces.component.UIComponent component,
                                                                       int skip)

Find the parent NamingContainer for the specified component skipping the specified number of naming containers.

getNamingContainer

public static javax.faces.component.NamingContainer getNamingContainer(javax.faces.component.UIComponent component)

Find the parent NamingContainer for the specified component.

isEditable

public static boolean isEditable(javax.faces.component.UIComponent component)

Return true if this component is editable

save

public static boolean save(javax.faces.context.FacesContext context,
                           javax.faces.component.UIComponent component,
                           boolean removeFromManager)

Save all data associated with the specified component and it's children

save

public static boolean save(javax.faces.context.FacesContext context,
                           DataSource dataSource,
                           boolean removeFromManager)

Save the specified component data if it's is not read only

checkForNestedForms

public static void checkForNestedForms(java.lang.String viewId,
                                       javax.faces.component.UIComponent component,
                                       boolean hasParentForm)

Check for nested forms

containsForm

public static boolean containsForm(javax.faces.component.UIComponent component)

Check if this component is a form or if it contains one

checkComponentIds

public static void checkComponentIds(javax.faces.component.UIViewRoot viewRoot,
                                     javax.faces.component.UIComponent base)

Recursively set unique ids for every component starting at the specified one.

getRenderer

public static javax.faces.render.Renderer getRenderer(javax.faces.context.FacesContext context,
                                                      java.lang.String family,
                                                      java.lang.String rendererType)

Return the renderer associated with this component or null if there is none.

getRequestParameter

public static java.lang.Object getRequestParameter(java.lang.String name)

Return the specified value from the request map if it exists.

getSelectItems

public static java.util.List<javax.faces.model.SelectItem> getSelectItems(javax.faces.component.UIComponent component)

Return list of SelectItem instances associated with the specified component

removeNonSelectItemChildren

public static java.util.List<?> removeNonSelectItemChildren(javax.faces.component.UIComponent component)

Remove any children of the component which are not UISelectItem or UISelectItems instances

restoreNonSelectItemChildren

public static void restoreNonSelectItemChildren(javax.faces.component.UIComponent component,
                                                java.util.List<?> removed)

Restore any children of the component which are not UISelectItem or UISelectItems instances

toString

public static java.lang.String toString(javax.faces.component.UIComponent component)

Return a string representation of the specified component tree.

renderComponent

public static void renderComponent(javax.faces.context.FacesContext context,
                                   javax.faces.component.UIComponent component)
                            throws java.io.IOException

Render the specified component and its children

Throws:

java.io.IOException

renderChildren

public static void renderChildren(javax.faces.context.FacesContext context,
                                  javax.faces.component.UIComponent component)
                           throws java.io.IOException

Render the children of a specified component

Throws:

java.io.IOException

hasStyleSheet

public static boolean hasStyleSheet(UIViewRootEx viewRoot,
                                    java.lang.String href)

Return true if the view root contains a style sheet resource matching the href

hasStyleSheet

public static boolean hasStyleSheet(UIViewRootEx viewRoot)

Return true if the view root contains any style sheet resource

hasMessage

public static boolean hasMessage(javax.faces.context.FacesContext context,
                                 java.lang.String summary)

Helper method to determine if the FacesContext contains a message with the specified summary.

isCancelled

public static boolean isCancelled(java.lang.Object value)

Static method to return true if the specified value indicates the operation been canceled.

addErrorMessage

public static void addErrorMessage(java.lang.String summary,
                                   java.lang.String detail)

Add an error FacesMessage to the current context.

addMessage

public static void addMessage(javax.faces.context.FacesContext context,
                              javax.faces.component.UIComponent component,
                              java.lang.String summary,
                              java.lang.Throwable t)

Add a FacesMessage to the specified context.

addMessage

public static void addMessage(javax.faces.application.FacesMessage.Severity severity,
                              java.lang.String summary,
                              java.lang.String detail)

Add a FacesMessage to the specified context.

addMessage

public static void addMessage(javax.faces.context.FacesContext context,
                              javax.faces.component.UIComponent component,
                              javax.faces.application.FacesMessage.Severity severity,
                              java.lang.String summary,
                              java.lang.String detail)

Add a FacesMessage to the specified context.

addMessage

public static void addMessage(javax.faces.context.FacesContext context,
                              javax.faces.application.FacesMessage.Severity severity,
                              java.lang.String clientId,
                              java.lang.String summary,
                              java.lang.String detail)

Add a FacesMessage to the specified context.

isDuplicateMessage

public static boolean isDuplicateMessage(javax.faces.application.FacesMessage.Severity severity,
                                         java.lang.String summary,
                                         java.lang.String detail,
                                         javax.faces.application.FacesMessage message)

resolveVariable

public static java.lang.Object resolveVariable(javax.faces.context.FacesContext context,
                                               java.lang.String name)

Resolve the named variable

resolveRequestMapVariable

public static java.lang.Object resolveRequestMapVariable(javax.faces.context.FacesContext context,
                                                         java.lang.String name)

isDecodeable

public static boolean isDecodeable(javax.faces.component.UIComponent component)

Return true if this component can be decoded

getValue

public static java.lang.Object getValue(javax.faces.context.FacesContext context,
                                        javax.faces.component.UIComponent component)

Get the value of a component.

Parameters:

context -

component -

Throws:

javax.faces.convert.ConverterException

convertValue

public static java.lang.String convertValue(javax.faces.context.FacesContext context,
                                            javax.faces.component.UIComponent component)
                                     throws javax.faces.convert.ConverterException

Format the value of a component.

Parameters:

context -

component -

Returns:

the converted value, with acf applied

Throws:

javax.faces.convert.ConverterException

isChecked

public static boolean isChecked(java.lang.Object value)

Return the checked state of the submitted value

getConverterForClass

public static javax.faces.convert.Converter getConverterForClass(java.lang.Class<?> clazz)

Create a converter for the specified class

getRequestObject

public static java.lang.Object getRequestObject(java.lang.String name)

Return the named object from the request map.

getRequestObject

public static java.lang.Object getRequestObject(javax.faces.context.FacesContext context,
                                                java.lang.String name)

Return the named object from the request map.

getResourceAsStream

public static java.io.InputStream getResourceAsStream(java.lang.Class<?> clazz,
                                                      java.lang.String name)

Open an input stream to the named resource

canSerializeObject

public static boolean canSerializeObject(java.lang.Object data)

Returns true if this data can be saved using objectToSerializable. This method should be used only in special cases; generally, implementers should know if data can be serialized. Dependence on this method may lead to strange logical errors (e.g. if a List can be serialized; its members cannot; the list is empty when passed to this method). Use of this method may impact performance.

objectToSerializable

public static java.lang.Object objectToSerializable(javax.faces.context.FacesContext context,
                                                    java.lang.Object data)

Utility method for serializing data. Supports (in order of preference):

• null
• javax.faces.component.StateHolder
• java.util.Collection (must be public; have public zero-arg constructor; members must be supported)
• java.util.Map (must be public; have public zero-arg constructor; members must be supported)
• java.io.Serializable

Any other conditions result in a RuntimeException.

Parameters:

context -

data - must implement Serializable or StateHolder; may be null

Returns:

serializable form or null for null argument or transient data

objectFromSerializable

public static java.lang.Object objectFromSerializable(javax.faces.context.FacesContext context,
                                                      javax.faces.component.UIComponent src,
                                                      java.lang.Object serForm)

Parameters:

context -

src -

serForm -

Returns:

the data or null if argument was null

objectFromSerializable

public static java.lang.Object objectFromSerializable(javax.faces.context.FacesContext context,
                                                      java.lang.Object serForm)

getHiddenFieldId

public static java.lang.String getHiddenFieldId()

Gets the id of the form's hidden field containing the ID of the control that submits the event.

Parameters:

context -

component -

submitAsForm -

Returns:

getHiddenFieldValue

public static java.lang.String getHiddenFieldValue(javax.faces.context.FacesContext context)

getHiddenExecId

public static java.lang.String getHiddenExecId()

getHiddenExecValue

public static java.lang.String getHiddenExecValue(javax.faces.context.FacesContext context)

createId

public static java.lang.String createId()

Utility method for generating a unique ID.

Returns:

ID String (in hexadecimal form)

getRestoreId

public static java.lang.String getRestoreId(javax.faces.context.FacesContext context,
                                            javax.faces.component.UIComponent component)

setRestoreRoot

public static void setRestoreRoot(javax.faces.context.FacesContext context,
                                  javax.faces.component.UIViewRoot viewRoot)

findRestoreComponent

public static javax.faces.component.UIComponent findRestoreComponent(javax.faces.context.FacesContext context,
                                                                     java.lang.String restoreId)

checkForNonSelectChildren

public static void checkForNonSelectChildren(javax.faces.component.UIComponent component)

Throw an exception if any children are invalid

calculateBundleNames

public static java.util.List<java.lang.String> calculateBundleNames(java.lang.String baseName,
                                                                    java.util.Locale locale)

Calculate bundle names to be loaded

getRequestParameters

public static RequestParameters getRequestParameters(javax.faces.context.FacesContext ctx)

Get the Request Customizer associayed with a FacesContext returns null if no customizer is available

getStyleKit

public static StyleKit getStyleKit(javax.faces.context.FacesContext ctx)

Get the stylekit used by the request.

Parameters:

ctx -

Returns:

makeUrlAbsolute

public static java.lang.String makeUrlAbsolute(javax.faces.context.FacesContext context,
                                               java.lang.String path)

isAbsoluteUrl

public static boolean isAbsoluteUrl(java.lang.String url)

The following are examples of absolute URLs:

• http://host:80/path
• ftp://user:pw@host:port/path
• news:a.news.group
• file:/c:/config.sys
• mailto:alasdair@domain.tld

This method does not provide a comprehensive test for all URL cases, but should suffice for most.

Parameters:

url - the non-null URL to test

Returns:

true if the pattern matches that of an absolute URL

normalizePageName

public static java.lang.String normalizePageName(javax.faces.context.FacesContext context,
                                                 java.lang.String name)

Normalize the page name if it is a relative page. It computes the page name based on the current page path if it is a relative path.

Parameters:

context -

name -

Returns:

getRendererAs

public static javax.faces.render.Renderer getRendererAs(javax.faces.render.Renderer renderer,
                                                        java.lang.Class<?> toImplement)

Used to find whether the renderer or any of it's delegates implements a certain interface, and if so returns the renderer or delegate.

Parameters:

renderer -

toImplement -

Returns:

isComponentReadOnly

public static boolean isComponentReadOnly(javax.faces.context.FacesContext context,
                                          javax.faces.component.UIComponent component)

Test if the specified component should be in a read-only state.