jakarta.faces.component.UIComponent Maven / Gradle / Ivy
/*
* Copyright (c) 1997, 2020 Oracle and/or its affiliates. All rights reserved.
*
* This program and the accompanying materials are made available under the
* terms of the Eclipse Public License v. 2.0, which is available at
* http://www.eclipse.org/legal/epl-2.0.
*
* This Source Code may also be made available under the following Secondary
* Licenses when the conditions for such availability set forth in the
* Eclipse Public License v. 2.0 are satisfied: GNU General Public License,
* version 2 with the GNU Classpath Exception, which is available at
* https://www.gnu.org/software/classpath/license.html.
*
* SPDX-License-Identifier: EPL-2.0 OR GPL-2.0 WITH Classpath-exception-2.0
*/
package jakarta.faces.component;
import static com.sun.faces.util.Util.isAnyNull;
import static com.sun.faces.util.Util.isOneOf;
import static jakarta.faces.application.Resource.COMPONENT_RESOURCE_KEY;
import static jakarta.faces.component.visit.VisitHint.SKIP_TRANSIENT;
import static jakarta.faces.component.visit.VisitHint.SKIP_UNRENDERED;
import static jakarta.faces.component.visit.VisitResult.ACCEPT;
import static jakarta.faces.component.visit.VisitResult.COMPLETE;
import static java.util.Collections.emptyMap;
import static java.util.logging.Level.SEVERE;
import java.io.IOException;
import java.io.InputStream;
import java.util.ArrayDeque;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Enumeration;
import java.util.HashMap;
import java.util.HashSet;
import java.util.Iterator;
import java.util.List;
import java.util.Locale;
import java.util.Map;
import java.util.MissingResourceException;
import java.util.Objects;
import java.util.PropertyResourceBundle;
import java.util.ResourceBundle;
import java.util.Set;
import java.util.logging.Level;
import java.util.logging.Logger;
import jakarta.el.ELContext;
import jakarta.el.ELException;
import jakarta.el.ValueExpression;
import jakarta.faces.FacesException;
import jakarta.faces.FacesWrapper;
import jakarta.faces.application.Resource;
import jakarta.faces.component.visit.VisitCallback;
import jakarta.faces.component.visit.VisitContext;
import jakarta.faces.component.visit.VisitHint;
import jakarta.faces.component.visit.VisitResult;
import jakarta.faces.context.FacesContext;
import jakarta.faces.event.AbortProcessingException;
import jakarta.faces.event.ComponentSystemEvent;
import jakarta.faces.event.ComponentSystemEventListener;
import jakarta.faces.event.FacesEvent;
import jakarta.faces.event.FacesListener;
import jakarta.faces.event.PostRestoreStateEvent;
import jakarta.faces.event.SystemEvent;
import jakarta.faces.event.SystemEventListener;
import jakarta.faces.event.SystemEventListenerHolder;
import jakarta.faces.render.Renderer;
/**
*
* UIComponent is the base class for all user interface components in Jakarta Server
* Faces. The set of {@link UIComponent} instances associated with a particular request and response are organized into
* a component tree under a {@link UIViewRoot} that represents the entire content of the request or response.
*
*
*
* For the convenience of component developers, {@link UIComponentBase} provides the default behavior that is specified
* for a {@link UIComponent}, and is the base class for all of the concrete {@link UIComponent} "base" implementations.
* Component writers are encouraged to subclass {@link UIComponentBase}, instead of directly implementing this abstract
* class, to reduce the impact of any future changes to the method signatures.
*
*
*
* If the {@link jakarta.faces.event.ListenerFor} annotation is attached to the class definition of a
* Component, that class must also implement {@link jakarta.faces.event.ComponentSystemEventListener}.
*
*
*
* Dynamically modifying the component tree can happen at any time, during and after restoring the view, but not during
* state saving and needs to function properly with respect to rendering and state saving
*
*/
public abstract class UIComponent implements PartialStateHolder, TransientStateHolder, SystemEventListenerHolder, ComponentSystemEventListener {
private static Logger LOGGER = Logger.getLogger("jakarta.faces.component", "jakarta.faces.LogStrings");
/**
*
* The value of this constant is used as the key in the component attribute map, the value for which is a
* java.beans.BeanInfo implementation describing the composite component. This BeanInfo is
* known as the composite component BeanInfo.
*
*
* @since 2.0
*/
public static final String BEANINFO_KEY = "jakarta.faces.component.BEANINFO_KEY";
/**
*
* The value of this constant is used as the key in the composite component BeanDescriptor for the
* Map<PropertyDescriptor> that contains meta-information for the declared facets for this composite
* component. This map must contain an entry under the key {@link #COMPOSITE_FACET_NAME}, even if no facets were
* explicitly declared. See {@link #COMPOSITE_FACET_NAME}.
*
*
* @since 2.0
*/
public static final String FACETS_KEY = "jakarta.faces.component.FACETS_KEY";
/**
*
* The value of this constant is used as the key in the component attributes Map for the
* {@link jakarta.faces.view.Location} in the view at which this component instance resides.
*
*
* @since 2.0
*/
public static final String VIEW_LOCATION_KEY = "jakarta.faces.component.VIEW_LOCATION_KEY";
/**
*
* The value of this constant is used as the key in the composite component BeanDescriptor for a
* ValueExpression that evaluates to the component-type of the composite component
* root UIComponent for this composite component, if one was declared by the composite component
* author.
*
*
* @since 2.0
*/
public static final String COMPOSITE_COMPONENT_TYPE_KEY = "jakarta.faces.component.COMPOSITE_COMPONENT_TYPE";
/**
*
* The value of this constant is used as the key in the Map returned as described in {@link #FACETS_KEY}
* for the PropertyDescriptor describing the composite component facet. The value of this constant is also
* used as the key in the Map returned from {@link #getFacets}. In this case, it refers to the actual facet
* that is the {@link jakarta.faces.component.UIPanel} that is the parent of the all of the components in the
* <composite:implementation> section of the composite component VDL file.
*
*
* @since 2.0
*/
public static final String COMPOSITE_FACET_NAME = "jakarta.faces.component.COMPOSITE_FACET_NAME";
/**
*
* This constant enables one to quickly discover the names of the declared composite component attributes that have been
* given default values by the composite component author. The information is exposed as a
* Collection<String> returned from the getValue() method on the composite component
* BeanDescriptor, when this constant is passed as the argument.
*
*
* @since 2.1
*/
public static final String ATTRS_WITH_DECLARED_DEFAULT_VALUES = "jakarta.faces.component.ATTR_NAMES_WITH_DEFAULT_VALUES";
/**
* key used to look up current component stack if FacesContext attributes
*/
private static final String _CURRENT_COMPONENT_STACK_KEY = "jakarta.faces.component.CURRENT_COMPONENT_STACK";
/**
* key used to look up current composite component stack if FacesContext attributes
*/
private static final String _CURRENT_COMPOSITE_COMPONENT_STACK_KEY = "jakarta.faces.component.CURRENT_COMPOSITE_COMPONENT_STACK";
enum PropertyKeysPrivate {
attributesThatAreSet
}
/**
* Properties that are tracked by state saving.
*/
enum PropertyKeys {
rendered, attributes, bindings, rendererType, systemEventListeners, behaviors, passThroughAttributes
}
/**
* List of attributes that have been set on the component (this may be from setValueExpression, the attributes map, or
* setters from the concrete HTML components. This allows for faster rendering of attributes as this list is
* authoritative on what has been set.
*/
List attributesThatAreSet;
ComponentStateHelper stateHelper;
UIComponent compositeParent;
private boolean isInView;
private Map resourceBundleMap;
// It is safe to cache this because components never go from being
// composite to non-composite.
private transient Boolean isCompositeComponent;
/**
* Track whether we have been pushed as current in order to handle mismatched pushes and pops of Jakarta Expression
* Language context stack. We use a counter to handle cases where the same component is pushed on multiple times
*/
private int _isPushedAsCurrentRefCount = 0;
// -------------------------------------------------------------- Attributes
/**
*
* Return a mutable Map representing the attributes (and properties, see below) associated wth this
* {@link UIComponent}, keyed by attribute name (which must be a String). The returned implementation must support all
* of the standard and optional Map methods, plus support the following additional requirements:
*
*
* - The
Map implementation must implement the java.io.Serializable interface.
* - Any attempt to add a
null key or value must throw a NullPointerException.
* - Any attempt to add a key that is not a String must throw a
ClassCastException.
* - If the attribute name specified as a key matches a property of this {@link UIComponent}'s implementation class,
* the following methods will have special behavior:
*
* containsKey - Return false.get() - If the property is readable, call the getter method and return the returned value (wrapping
* primitive values in their corresponding wrapper classes); otherwise throw IllegalArgumentException.put() - If the property is writeable, call the setter method to set the corresponding value
* (unwrapping primitive values in their corresponding wrapper classes). If the property is not writeable, or an attempt
* is made to set a property of primitive type to null, throw IllegalArgumentException.remove - Throw IllegalArgumentException.
*
*
*
* @return the component attribute map.
*/
public abstract Map getAttributes();
/**
*
* This is a convenience method that simply calls {@link #getPassThroughAttributes(boolean)}, passing {@code true} as
* the argument. This method must never return {@code null}.
*
*
* @return the pass-through attribute map.
* @since 2.2
*/
public Map getPassThroughAttributes() {
return getPassThroughAttributes(true);
}
/**
*
* This method has the same specification as {@link #getPassThroughAttributes() } except that it is allowed to return
* {@code null} if and only if the argument {@code create} is {@code false} and no pass through attribute data structure
* exists for this instance. The returned {@code Map} implementation must support all of the standard and optional
* {@code Map} methods, plus support the following additional requirements. The map must be stored in using
* {@link #getStateHelper}.
*
*
*
*
*
* The {@code Map} implementation must implement {@code java.io.Serializable}.
*
*
*
* Any attempt to add a {@code null} key or value must throw a {@code NullPointerException}.
*
*
*
* Any attempt to add a key that is not a {@code String} must throw an {@code IllegalArgumentException}.
*
*
*
* For backward compatibility with components that extend directly from this class, a default implementation is provided
* that returns the empty map.
*
*
*
*
* @param create if true, a new {@code Map} instance will be created if it does not exist already. If
* false, and there is no existing Map instance, one will not be created and null
* will be returned.
* @return A {@code Map} instance, or {@code null}.
*
* @since 2.2
*/
public Map getPassThroughAttributes(boolean create) {
return emptyMap();
}
// ---------------------------------------------------------------- Bindings
/**
*
* Return the {@link ValueExpression} used to calculate the value for the specified attribute or property name, if any.
*
*
*
* This method must be overridden and implemented for components that comply with Jakarta Faces 1.2 and later.
*
*
* @param name Name of the attribute or property for which to retrieve a {@link ValueExpression}
* @return the value expression, or null.
* @since 1.2
* @throws NullPointerException if name is null
*
*/
public ValueExpression getValueExpression(String name) {
if (name == null) {
throw new NullPointerException();
}
@SuppressWarnings("unchecked")
Map map = (Map) getStateHelper().get(UIComponentBase.PropertyKeys.bindings);
return map != null ? map.get(name) : null;
}
/**
*
* Set the {@link ValueExpression} used to calculate the value for the specified attribute or property name, if any.
*
*
*
* The implementation must call {@link ValueExpression#isLiteralText} on the argument expression. If
* isLiteralText() returns true, invoke {@link ValueExpression#getValue} on the argument
* expression and pass the result as the value parameter in a call to this.{@link
* #getAttributes()}.put(name, value) where name is the argument name. If an exception
* is thrown as a result of calling {@link ValueExpression#getValue}, wrap it in a {@link jakarta.faces.FacesException}
* and re-throw it. If isLiteralText() returns false, simply store the un-evaluated
* expression argument in the collection of ValueExpressions under the key given by the
* argument name.
*
*
*
* This method must be overridden and implemented for components that comply with Jakarta Faces 1.2 and later.
*
*
* @since 1.2
*
* @param name Name of the attribute or property for which to set a {@link ValueExpression}
* @param binding The {@link ValueExpression} to set, or null to remove any currently set
* {@link ValueExpression}
*
* @throws IllegalArgumentException if name is one of id or parent
* @throws NullPointerException if name is null
*
*/
public void setValueExpression(String name, ValueExpression binding) {
if (name == null) {
throw new NullPointerException();
}
if (isOneOf(name, "id", "parent")) {
throw new IllegalArgumentException();
}
if (binding != null) {
if (!binding.isLiteralText()) {
@SuppressWarnings("unchecked")
List sProperties = (List) getStateHelper().get(PropertyKeysPrivate.attributesThatAreSet);
if (sProperties == null) {
getStateHelper().add(PropertyKeysPrivate.attributesThatAreSet, name);
} else if (!sProperties.contains(name)) {
getStateHelper().add(PropertyKeysPrivate.attributesThatAreSet, name);
}
getStateHelper().put(UIComponentBase.PropertyKeys.bindings, name, binding);
} else {
ELContext context = FacesContext.getCurrentInstance().getELContext();
try {
getAttributes().put(name, binding.getValue(context));
} catch (ELException ele) {
throw new FacesException(ele);
}
}
} else {
getStateHelper().remove(PropertyKeysPrivate.attributesThatAreSet, name);
getStateHelper().remove(UIComponentBase.PropertyKeys.bindings, name);
}
}
// -------------------------------------------------------------- Properties
boolean initialState;
/**
*
* An implementation of {@link PartialStateHolder#markInitialState}, this method is called by the runtime to indicate
* that the instance should start tracking changes to its state.
*
*
* @since 2.0
*/
@Override
public void markInitialState() {
initialState = true;
}
/**
*
* An implementation of {@link PartialStateHolder#initialStateMarked}, this method is called by the runtime to test if
* the {@link PartialStateHolder#markInitialState} method was called.
*
*
* @since 2.0
*/
@Override
public boolean initialStateMarked() {
return initialState;
}
/**
*
* An implementation of {@link PartialStateHolder#clearInitialState}, this method is called by the runtime to tell the
* instance to stop tracking state changes.
*
*
* @since 2.0
*/
@Override
public void clearInitialState() {
initialState = false;
}
/**
*
* Return the {@link StateHelper} instance used to help this component implement {@link PartialStateHolder}.
*
*
* @return the state helper.
* @since 2.0
*/
protected StateHelper getStateHelper() {
return getStateHelper(true);
}
/**
*
* Like {@link #getStateHelper()}, but only create a state helper instance if the argument creat is
* true.
*
*
* @param create if true, a new {@link StateHelper} instance will be created if it does not exist already.
* If false, and there is no existing StateHelper instance, one will not be created and
* null will be returned.
*
* @return the state helper.
* @since 2.0
*/
protected StateHelper getStateHelper(boolean create) {
if (create && stateHelper == null) {
stateHelper = new ComponentStateHelper(this);
}
return stateHelper;
}
/**
*
* Return the {@link TransientStateHelper} instance for this UIComponent instance. The default
* implementation simply calls through to {@link #getTransientStateHelper(boolean)} passing true as the
* argument.
*
*
* @return the transient state helper.
* @since 2.1
*/
public TransientStateHelper getTransientStateHelper() {
return getTransientStateHelper(true);
}
/**
*
* Return the {@link TransientStateHelper} instance for this UIComponent instance.
*
*
* @param create if true create, if necessary, any internal data structures. If false, do not
* create any instances. In this case, it is possible for this method to return null.
* @return the transient state helper.
* @since 2.1
*/
public TransientStateHelper getTransientStateHelper(boolean create) {
if (create && stateHelper == null) {
stateHelper = new ComponentStateHelper(this);
}
return stateHelper;
}
/**
*
* For components that need to support the concept of transient state, this method will restore any state saved on a
* prior call to {@link #saveTransientState}.
*
*
* @since 2.1
*/
@Override
public void restoreTransientState(FacesContext context, Object state) {
boolean forceCreate = state != null;
TransientStateHelper helper = getTransientStateHelper(forceCreate);
if (helper != null) {
helper.restoreTransientState(context, state);
}
}
/**
*
* For components that need to support the concept of transient state, this method will save any state that is known to
* be transient in nature.
*
*
* @since 2.1
*/
@Override
public Object saveTransientState(FacesContext context) {
TransientStateHelper helper = getTransientStateHelper(false);
return helper == null ? null : helper.saveTransientState(context);
}
/**
*
* Return true if this component is within the view hierarchy otherwise false
*
* @return true if within a view hierarchy, false otherwise.
* @since 2.0
*/
public boolean isInView() {
return isInView;
}
/**
*
* Updates the status as to whether or not this component is currently within the view hierarchy. This method
* must never be called by developers; a {@link UIComponent}'s internal implementation will call it as components are
* added to or removed from a parent's child List or facet Map.
*
*
* @param isInView flag indicating whether or not this component is within the view hierachy
*
* @since 2.0
*/
public void setInView(boolean isInView) {
this.isInView = isInView;
}
/**
*
* Enable Jakarta Expression Language to access the clientId of a component. This is particularly useful in
* combination with the component and cc implicit objects. A default implementation is
* provided that simply calls {@link FacesContext#getCurrentInstance} and then calls through to
* {@link #getClientId(FacesContext)}.
*
*
* @return the client id.
* @since 2.0
*/
public String getClientId() {
return getClientId(FacesContext.getCurrentInstance());
}
/**
*
* Return a client-side identifier for this component, generating one if necessary. The associated {@link Renderer}, if
* any, will be asked to convert the clientId to a form suitable for transmission to the client.
*
*
*
* The return from this method must be the same value throughout the lifetime of the instance, unless the
* id property of the component is changed, or the component is placed in a {@link NamingContainer} whose
* client ID changes (for example, {@link UIData}). However, even in these cases, consecutive calls to this method must
* always return the same value. The implementation must follow these steps in determining the clientId:
*
*
*
* Find the closest ancestor to this component in the view hierarchy that implements
* NamingContainer. Call getContainerClientId() on it and save the result as the
* parentId local variable. Call {@link #getId} on this component and save the result as the
* myId local variable. If myId is null, call
* context.getViewRoot().createUniqueId() and assign the result to myId. If parentId is
* non-null, let myId equal parentId
* + {@link UINamingContainer#getSeparatorChar} + myId. Call {@link Renderer#convertClientId}, passing
* myId, and return the result.
*
*
* @param context The {@link FacesContext} for the current request
* @return the client id.
*
* @throws NullPointerException if context is null
*/
public abstract String getClientId(FacesContext context);
/**
*
* Allow components that implement {@link NamingContainer} to selectively disable prepending their clientId to their
* descendent's clientIds by breaking the prepending logic into a separately callable method. See {@link #getClientId}
* for usage.
*
*
*
* By default, this method will call through to {@link #getClientId} and return the result.
*
* @param context the Faces context.
* @return the container client id.
* @since 1.2
*
* @throws NullPointerException if context is null
*/
public String getContainerClientId(FacesContext context) {
if (context == null) {
throw new NullPointerException();
}
return getClientId(context);
}
/**
*
* Return the identifier of the component family to which this component belongs. This identifier, in conjunction with
* the value of the rendererType property, may be used to select the appropriate {@link Renderer} for this
* component instance. Note this method should NOT return null
*
*
* @return the component family (not null).
*/
public abstract String getFamily();
/**
*
* Return the component identifier of this {@link UIComponent}.
*
*
* @return the component identifier.
*/
public abstract String getId();
/**
*
* Set the component identifier of this {@link UIComponent} (if any). Component identifiers must obey the following
* syntax restrictions:
*
*
* - Must not be a zero-length String.
* - First character must be a letter or an underscore ('_').
* - Subsequent characters must be a letter, a digit, an underscore ('_'), or a dash ('-').
* -
*
*
*
* Component identifiers must also obey the following semantic restrictions (note that this restriction is
* NOT enforced by the setId() implementation):
*
*
* - The specified identifier must be unique among all the components (including facets) that are descendents of the
* nearest ancestor {@link UIComponent} that is a {@link NamingContainer}, or within the scope of the entire component
* tree if there is no such ancestor that is a {@link NamingContainer}.
*
*
* @param id The new component identifier, or null to indicate that this {@link UIComponent} does not have
* a component identifier
*
* @throws IllegalArgumentException if id is not syntactically valid
*/
public abstract void setId(String id);
/**
*
* Return the parent {@link UIComponent} of this UIComponent, if any. A component must allow child
* components to be added to and removed from the list of children of this component, even though the child component
* returns null from getParent( ).
*
*
* @return the parent component.
*/
public abstract UIComponent getParent();
/**
*
* Set the parent UIComponent of this
* UIComponent. If
* parent.isInView() returns true, calling this method will first cause a
* {@link jakarta.faces.event.PreRemoveFromViewEvent} to be published, for this node, and then the children of this
* node. Then, once the re-parenting has occurred, a {@link jakarta.faces.event.PostAddToViewEvent} will be published as
* well, first for this node, and then for the node's children, but only if any
* of the following conditions are true.
*
*
*
*
*
* -
*
* {@link jakarta.faces.context.FacesContext#getCurrentPhaseId} returns {@link jakarta.faces.event.PhaseId#RESTORE_VIEW}
* and partial state saving is enabled.
*
*
*
* -
*
* {@link jakarta.faces.context.FacesContext#isPostback} returns false and
* {@link jakarta.faces.context.FacesContext#getCurrentPhaseId} returns something other than
* {@link jakarta.faces.event.PhaseId#RESTORE_VIEW}
*
*
*
*
*
*
*
*
* This method must never be called by developers; a {@link UIComponent}'s internal implementation will call it
* as components are added to or removed from a parent's child List or facet Map.
*
*
* @param parent The new parent, or null for the root node of a component tree
*/
public abstract void setParent(UIComponent parent);
/**
*
* Return true if this component (and its children) should be rendered during the Render Response
* phase of the request processing lifecycle.
*
*
* @return true if the component should be rendered, false otherwise.
*/
public abstract boolean isRendered();
/**
*
* Set the rendered property of this {@link UIComponent}.
*
*
* @param rendered If true render this component; otherwise, do not render this component
*/
public abstract void setRendered(boolean rendered);
/**
*
* Return the {@link Renderer} type for this {@link UIComponent} (if any).
*
*
* @return the renderer type.
*/
public abstract String getRendererType();
/**
*
* Set the {@link Renderer} type for this {@link UIComponent}, or null for components that render
* themselves.
*
*
* @param rendererType Logical identifier of the type of {@link Renderer} to use, or null for components
* that render themselves
*/
public abstract void setRendererType(String rendererType);
/**
*
* Return a flag indicating whether this component is responsible for rendering its child components. The default
* implementation in {@link UIComponentBase#getRendersChildren} tries to find the renderer for this component. If it
* does, it calls {@link Renderer#getRendersChildren} and returns the result. If it doesn't, it returns false. As of
* version 1.2 of the Jakarta Faces Specification, component authors are encouraged to return true
* from this method and rely on {@link UIComponentBase#encodeChildren}.
*
*
* @return true if the component renders its children, false otherwise.
*/
public abstract boolean getRendersChildren();
/**
*
* Return a Map<String,String> of the ResourceBundle for this component. A component may
* have a ResourceBundle associated with it. This bundle may contain localized properties relating to
* instances of this component. The default implementation first looks for a ResourceBundle with a base
* name equal to the fully qualified class name of the current UIComponent this and Locale
* equal to the Locale of the current UIViewRoot. If no such bundle is found, and the
* component is a composite component, let resourceName be the resourceName of the {@link Resource}
* for this composite component, replacing the file extension with ".properties". Let libraryName be the
* libraryName of the the {@link Resource} for this composite component. Call
* {@link jakarta.faces.application.ResourceHandler#createResource(java.lang.String,java.lang.String)}, passing the
* derived resourceName and libraryName. Note that this will automatically allow for the localization
* of the ResourceBundle due to the localization facility implemented in createResource, which
* is specified in section 2.6.1.3 "Resource Identifiers" of the Jakarta Faces Specification Document.
* If the resultant {@link Resource} exists and can be
* found, the InputStream for the resource is used to create a ResourceBundle. If either of
* the two previous steps for obtaining the ResourceBundle for this component is successful, the
* ResourceBundle is wrapped in a Map<String,String> and returned. Otherwise
* Collections.EMPTY_MAP is returned.
*
*
* @return the resource bundle map.
* @since 2.0
*/
public Map getResourceBundleMap() {
if (resourceBundleMap == null) {
FacesContext context = FacesContext.getCurrentInstance();
// Step 1: look for a ResourceBundle under the FQCN of this instance
ResourceBundle resourceBundle = findResourceBundleUnderFQCNofThis(context);
// Step 2: if this is a composite component, look for a
// ResourceBundle as a Resource
if (resourceBundle == null) {
resourceBundle = findResourceBundleAsResource(context);
}
// Step 3: if the previous steps yielded a ResourceBundle, wrap it
// with a Map
if (resourceBundle != null) {
resourceBundleMap = wrapBundleAsMap(resourceBundle);
}
if (resourceBundleMap == null) {
resourceBundleMap = emptyMap();
}
}
return resourceBundleMap;
}
// This is necessary for Jakarta Faces components that extend from UIComponent
// directly rather than extending from UIComponentBase. Such components
// may need to have implementations provided for methods that originated
// from a spec version more recent than the version with which the component
// complies. Currently this private property is only consulted in the
// getValueExpression() method.
// private boolean isUIComponentBase;
// private boolean isUIComponentBaseIsSet = false;
//
// private boolean isUIComponentBase() {
// if (!isUIComponentBaseIsSet) {
// isUIComponentBase = (this instanceof UIComponentBase);
// }
//
// return isUIComponentBase;
// }
// ------------------------------------------------- Tree Management Methods
/**
*
* Return a mutable List representing the child
* {@link UIComponent}s associated with this component. The returned implementation must support all of the standard and
* optional List methods, plus support the following additional requirements:
*
*
* - The
List implementation must implement the java.io.Serializable interface.
* - Any attempt to add a
null must throw a NullPointerException
* - Any attempt to add an object that does not implement {@link UIComponent} must throw a ClassCastException.
* - Whenever a new child component is added, the
parent property of the child must be set to this
* component instance. If the parent property of the child was already non-null, the child must first be
* removed from its previous parent (where it may have been either a child or a facet).
* - Whenever an existing child component is removed, the
parent property of the child must be set to
* null.
*
* -
*
* After the child component has been added to the view, {@link jakarta.faces.application.Application#publishEvent} must
* be called, passing {@link jakarta.faces.event.PostAddToViewEvent}.class as the first argument and the
* newly added component as the second argument if any the following cases are true.
*
*
*
*
* -
*
* {@link jakarta.faces.context.FacesContext#getCurrentPhaseId} returns {@link jakarta.faces.event.PhaseId#RESTORE_VIEW}
* and partial state saving is enabled.
*
*
*
* -
*
* {@link jakarta.faces.context.FacesContext#isPostback} returns false and
* {@link jakarta.faces.context.FacesContext#getCurrentPhaseId} returns something other than
* {@link jakarta.faces.event.PhaseId#RESTORE_VIEW}
*
*
*
*
*
*
*
*
*
* @return the list of children.
*/
public abstract List getChildren();
/**
*
* Return the number of child {@link UIComponent}s that are associated with this {@link UIComponent}. If there are no
* children, this method must return 0. The method must not cause the creation of a child component list.
*
*
* @return the number of child components.
*/
public abstract int getChildCount();
/**
*
* Search for and return the {@link UIComponent} with an id that
* matches the specified search expression (if any), according to the algorithm described below.
*
*
*
* WARNING: The found UIComponent instance, if any, is returned without regard for its
* tree traversal context. Retrieving an Jakarta Expression Language-bound attribute from the component is not safe.
* Jakarta Expression Language expressions can contain implicit objects, such as #{component}, which assume
* they are being evaluated within the scope of a tree traversal context. Evaluating expressions with these kinds of
* implicit objects outside of a tree traversal context produces undefined results. See {@link #invokeOnComponent} for a
* method that does correctly account for the tree traversal context when operating on the found
* UIComponent instance. {@link #invokeOnComponent} is also useful to find components given a simple
* clientId.
*
*
* Component identifiers are required to be unique within the scope of the closest ancestor {@link NamingContainer} that
* encloses this component (which might be this component itself). If there are no {@link NamingContainer} components in
* the ancestry of this component, the root component in the tree is treated as if it were a {@link NamingContainer},
* whether or not its class actually implements the {@link NamingContainer} interface.
*
*
*
* A search expression consists of either an identifier (which is matched exactly against the id
* property of a {@link UIComponent}, or a series of such identifiers linked by the
* {@link UINamingContainer#getSeparatorChar} character value. The search algorithm should operates as follows, though
* alternate alogrithms may be used as long as the end result is the same:
*
*
*
* - Identify the {@link UIComponent} that will be the base for searching, by stopping as soon as one of the following
* conditions is met:
*
* - If the search expression begins with the the separator character (called an "absolute" search expression), the
* base will be the root {@link UIComponent} of the component tree. The leading separator character will be stripped
* off, and the remainder of the search expression will be treated as a "relative" search expression as described
* below.
* - Otherwise, if this {@link UIComponent} is a {@link NamingContainer} it will serve as the basis.
* - Otherwise, search up the parents of this component. If a {@link NamingContainer} is encountered, it will be the
* base.
* - Otherwise (if no {@link NamingContainer} is encountered) the root {@link UIComponent} will be the base.
*
*
* - The search expression (possibly modified in the previous step) is now a "relative" search expression that will be
* used to locate the component (if any) that has an
id that matches, within the scope of the base
* component. The match is performed as follows:
*
* - If the search expression is a simple identifier, this value is compared to the
id property, and then
* recursively through the facets and children of the base {@link UIComponent} (except that if a descendant
* {@link NamingContainer} is found, its own facets and children are not searched).
* - If the search expression includes more than one identifier separated by the separator character, the first
* identifier is used to locate a {@link NamingContainer} by the rules in the previous bullet point. Then, the
*
findComponent() method of this {@link NamingContainer} will be called, passing the remainder of the
* search expression.
*
*
*
*
* @param expr Search expression identifying the {@link UIComponent} to be returned
*
* @return the found {@link UIComponent}, or null if the component was not found.
*
* @throws IllegalArgumentException if an intermediate identifier in a search expression identifies a
* {@link UIComponent} that is not a {@link NamingContainer}
* @throws NullPointerException if expr is null
*/
public abstract UIComponent findComponent(String expr);
/**
*
* Starting at this component in the View hierarchy, search for a component
* with a clientId equal to the argument clientId and, if found, call the
* {@link ContextCallback#invokeContextCallback} method on the argument callback, passing the current
* {@link FacesContext} and the found component as arguments. This method is similar to {@link #findComponent} but it
* does not support the leading {@link UINamingContainer#getSeparatorChar} syntax for searching from the root of the
* View.
*
*
*
* The default implementation will first check if this.getClientId() is equal to the argument
* clientId. If so, first call {@link #pushComponentToEL}, then call
* the {@link ContextCallback#invokeContextCallback} method on the argument callback, passing through the
* FacesContext argument and passing this as the component argument. Then
* call {@link #popComponentFromEL}. If an Exception is thrown by the callback, wrap it in a
* {@link FacesException} and re-throw it. Otherwise, return true.
*
*
*
* Otherwise, for each component returned by {@link #getFacetsAndChildren}, call invokeOnComponent()
* passing the arguments to this method, in order. The first time invokeOnComponent() returns true, abort
* traversing the rest of the Iterator and return true.
*
*
*
* When calling {@link ContextCallback#invokeContextCallback} the implementation of this method must guarantee that the
* state of the component passed to the callback correctly reflects the component's position in the View hierarchy with
* respect to any state found in the argument clientId. For example, an iterating component such as
* {@link UIData} will need to set its row index to correctly reflect the argument clientId before finding
* the appropriate child component backed by the correct row. When the callback returns, either normally or by throwing
* an Exception the implementation of this method must restore the state of the view to the way it was
* before invoking the callback.
*
*
*
* If none of the elements from {@link #getFacetsAndChildren} returned true from
* invokeOnComponent(), return false.
*
*
*
* Simple usage example to find a component by clientId.
*
*
*
*
private UIComponent found = null;
private void doFind(FacesContext context, String clientId) {
context.getViewRoot().invokeOnComponent(context, clientId,
new ContextCallback() {
public void invokeContextCallback(FacesContext context,
UIComponent component) {
found = component;
}
});
}
*
*
*
*
*
* @since 1.2
*
* @param context the {@link FacesContext} for the current request
*
* @param clientId the client identifier of the component to be passed to the argument callback.
*
* @param callback an implementation of the Callback interface.
*
* @throws NullPointerException if any of the arguments are null
*
* @throws FacesException if the argument Callback throws an Exception, it is wrapped in a FacesException
* and re-thrown.
*
* @return true if the a component with the given clientId is found, the callback method was
* successfully invoked passing that component as an argument, and no Exception was thrown. Returns false
* if no component with the given clientId is found.
*
*/
public boolean invokeOnComponent(FacesContext context, String clientId, ContextCallback callback) throws FacesException {
if (isAnyNull(context, clientId, callback)) {
throw new NullPointerException();
}
boolean found = false;
if (clientId.equals(getClientId(context))) {
try {
pushComponentToEL(context, this);
callback.invokeContextCallback(context, this);
return true;
} catch (Exception e) {
throw new FacesException(e);
} finally {
popComponentFromEL(context);
}
} else {
Iterator facetsAndChildrenIterator = getFacetsAndChildren();
while (facetsAndChildrenIterator.hasNext() && !found) {
found = facetsAndChildrenIterator.next().invokeOnComponent(context, clientId, callback);
}
}
return found;
}
// ------------------------------------------------ Facet Management Methods
/**
*
* Return a mutable Map representing the facet {@link UIComponent}s associated with this
* {@link UIComponent}, keyed by facet name (which must be a String). The returned implementation must support all of
* the standard and optional Map methods, plus support the following additional requirements:
*
*
*
* - The
Map implementation must implement the java.io.Serializable interface.
* - Any attempt to add a
null key or value must throw a NullPointerException.
* - Any attempt to add a key that is not a String must throw a ClassCastException.
* - Any attempt to add a value that is not a {@link UIComponent} must throw a ClassCastException.
* - Whenever a new facet {@link UIComponent} is added:
*
* - The
parent property of the component must be set to this component instance.
* - If the
parent property of the component was already non-null, the component must first be removed
* from its previous parent (where it may have been either a child or a facet).
*
*
*
* - Whenever an existing facet {@link UIComponent} is removed:
*
* - The
parent property of the facet must be set to null.
*
*
*
*
* @return the map of facets.
*/
public abstract Map getFacets();
/**
*
* Return the number of facet {@link UIComponent}s that are associated with this {@link UIComponent}. If there are no
* facets, this method must return 0. The method must not cause the creation of a facet component map.
*
*
*
* For backwards compatability with classes that extend UIComponent directly, a default implementation is provided that
* simply calls {@link #getFacets} and then calls the size() method on the returned Map. A
* more optimized version of this method is provided in {@link UIComponentBase#getFacetCount}.
*
* @return the number of facets.
* @since 1.2
*/
public int getFacetCount() {
return getFacets().size();
}
/**
*
* Convenience method to return the named facet, if it exists, or null otherwise. If the requested facet
* does not exist, the facets Map must not be created.
*
*
* @param name Name of the desired facet
* @return the component, or null.
*/
public abstract UIComponent getFacet(String name);
/**
*
* Return an Iterator over the facet followed by child {@link UIComponent}s of this {@link UIComponent}.
* Facets are returned in an undefined order, followed by all the children in the order they are stored in the child
* list. If this component has no facets or children, an empty Iterator is returned.
*
*
*
* The returned Iterator must not support the remove() operation.
*
*
* @return the facets and children iterator.
*/
public abstract Iterator getFacetsAndChildren();
// -------------------------------------------- Lifecycle Processing Methods
/**
*
* Broadcast the specified {@link FacesEvent} to all registered event listeners who have expressed an interest in events
* of this type. Listeners are called in the order in which they were added.
*
*
* If the event is an instance of {@link jakarta.faces.event.BehaviorEvent} and the current
* component is the source of the event call
* {@link jakarta.faces.event.BehaviorEvent#getBehavior} to get the {@link jakarta.faces.component.behavior.Behavior}
* for the event.
*
* Call
* {@link jakarta.faces.component.behavior.Behavior#broadcast(jakarta.faces.event.BehaviorEvent)} on the
* Behavior instance.
*
*
* @param event The {@link FacesEvent} to be broadcast
*
* @throws AbortProcessingException Signal the Jakarta Faces implementation that no further processing on the
* current event should be performed
* @throws IllegalArgumentException if the implementation class of this {@link FacesEvent} is not supported by this
* component
* @throws NullPointerException if event is null
*/
public abstract void broadcast(FacesEvent event) throws AbortProcessingException;
/**
*
* Decode any new state of this {@link UIComponent} from the request contained in the specified {@link FacesContext},
* and store this state as needed.
*
*
* During decoding, events may be enqueued for later processing (by event listeners who have registered an interest), by
* calling queueEvent().
*
*
* @param context {@link FacesContext} for the request we are processing
*
* @throws NullPointerException if context is null
*/
public abstract void decode(FacesContext context);
/**
*
* Perform a tree visit starting at this node in the tree.
*
*
*
*
*
* UIComponent.visitTree() implementations do not invoke the {@link VisitCallback} directly, but instead call
* {@link VisitContext#invokeVisitCallback} to invoke the callback. This allows {@code VisitContext} implementations to
* provide optimized tree traversals, for example by only calling the {@code
* VisitCallback} for a subset of components.
*
*
*
* UIComponent.visitTree() implementations must call UIComponent.pushComponentToEL() before performing the visit and
* UIComponent.popComponentFromEL() after the visit.
*
*
*
* @param visitContext the VisitContext for this visit
* @param callback the VisitCallback instance whose visit method will be called for each node
* visited.
* @return component implementations may return true to indicate that the tree visit is complete (eg. all
* components that need to be visited have been visited). This results in the tree visit being short-circuited such that
* no more components are visited.
*
* @see VisitContext#invokeVisitCallback VisitContext.invokeVisitCallback()
*
* @since 2.0
*/
public boolean visitTree(VisitContext visitContext, VisitCallback callback) {
// First check to see whether we are visitable. If not
// short-circuit out of this subtree, though allow the
// visit to proceed through to other subtrees.
if (!isVisitable(visitContext)) {
return false;
}
// Push ourselves to Jakarta Expression Language before visiting
FacesContext facesContext = visitContext.getFacesContext();
pushComponentToEL(facesContext, null);
try {
// Visit ourselves. Note that we delegate to the
// VisitContext to actually perform the visit.
VisitResult result = visitContext.invokeVisitCallback(this, callback);
// If the visit is complete, short-circuit out and end the visit
if (result == COMPLETE) {
return true;
}
// Visit children if necessary
if (result == ACCEPT) {
Iterator kids = getFacetsAndChildren();
while (kids.hasNext()) {
boolean done = kids.next().visitTree(visitContext, callback);
// If any kid visit returns true, we are done.
if (done) {
return true;
}
}
}
} finally {
// Pop ourselves off the Jakarta Expression Language stack
popComponentFromEL(facesContext);
}
// Return false to allow the visit to continue
return false;
}
/**
*
* Return true if this component should be visited, false otherwise. Called by
* {@link UIComponent#visitTree UIComponent.visitTree()} to determine whether this component satisfies the hints
* returned by {@link jakarta.faces.component.visit.VisitContext#getHints}.
*
*
*
*
*
* If this method returns false, the tree visited is short-circuited such that neither the component nor any of its
* descendents will be visited
*
*
*
* Custom {@code visitTree()} implementations may call this method to determine whether the component is visitable
* before performing any visit-related processing.
*
*
*
*
* @param context the Visit context.
* @return true if visitable, false otherwise.
* @since 2.0
*/
protected boolean isVisitable(VisitContext context) {
// VisitHints currently defines two hints that affect visitability:
// VIIST_RENDERED and VISIT_TRANSIENT.
// Check for both of these and if set, verify that we comply.
Set hints = context.getHints();
if (hints.contains(SKIP_UNRENDERED) && !isRendered() || hints.contains(SKIP_TRANSIENT) && isTransient()) {
return false;
}
return true;
}
/**
*
* If our rendered property is true, render the
* beginning of the current state of this {@link UIComponent} to the response contained in the specified
* {@link FacesContext}. Call
* {@link #pushComponentToEL(jakarta.faces.context.FacesContext,jakarta.faces.component.UIComponent)}. Call
* {@link jakarta.faces.application.Application#publishEvent}, passing
* {@link jakarta.faces.event.PreRenderComponentEvent}.class as the first argument and the component
* instance to be rendered as the second argument.
*
*
*
* If a {@link Renderer} is associated with this {@link UIComponent}, the actual encoding will be delegated to
* {@link Renderer#encodeBegin(FacesContext, UIComponent)}.
*
*
*
* If our rendered property is false, call
* {@link #pushComponentToEL(jakarta.faces.context.FacesContext,jakarta.faces.component.UIComponent)} and return
* immediately.
*
*
* @param context {@link FacesContext} for the response we are creating
*
* @throws IOException if an input/output error occurs while rendering
* @throws NullPointerException if context is null
*/
public abstract void encodeBegin(FacesContext context) throws IOException;
/**
*
* If our rendered property is true, render the child {@link UIComponent}s of this
* {@link UIComponent}. This method will only be called if the rendersChildren property is
* true.
*
*
*
* If a {@link Renderer} is associated with this {@link UIComponent}, the actual encoding will be delegated to
* {@link Renderer#encodeChildren(FacesContext, UIComponent)}. If no {@link Renderer}
* is associated with this {@link UIComponent}, iterate over each of the children of this component and call
* {@link #encodeAll(jakarta.faces.context.FacesContext)}.
*
*
* @param context {@link FacesContext} for the response we are creating
*
* @throws IOException if an input/output error occurs while rendering
* @throws NullPointerException if context is null
*/
public abstract void encodeChildren(FacesContext context) throws IOException;
/**
*
* If our rendered property is true, render the
* ending of the current state of this {@link UIComponent}.
*
*
*
* If a {@link Renderer} is associated with this {@link UIComponent}, the actual encoding will be delegated to
* {@link Renderer#encodeEnd(FacesContext, UIComponent)}.
*
*
*
* Call {@link UIComponent#popComponentFromEL}. before returning regardless of the value of the rendered
* property.
*
*
* @param context {@link FacesContext} for the response we are creating
*
* @throws IOException if an input/output error occurs while rendering
* @throws NullPointerException if context is null
*/
public abstract void encodeEnd(FacesContext context) throws IOException;
/**
*
* If this component returns true from {@link #isRendered}, take the following action.
*
*
*
* Render this component and all its children that return true from isRendered(), regardless
* of the value of the {@link #getRendersChildren} flag.
*
*
* @param context the Faces context.
* @since 1.2
* @throws IOException if an input/output error occurs while rendering
* @throws NullPointerException if context is null
*/
public void encodeAll(FacesContext context) throws IOException {
if (context == null) {
throw new NullPointerException();
}
if (!isRendered()) {
return;
}
encodeBegin(context);
if (getRendersChildren()) {
encodeChildren(context);
} else if (getChildCount() > 0) {
for (UIComponent kid : getChildren()) {
kid.encodeAll(context);
}
}
encodeEnd(context);
}
@SuppressWarnings("unchecked")
private static ArrayDeque _getComponentELStack(String keyName, Map contextAttributes) {
return (ArrayDeque) contextAttributes.computeIfAbsent(keyName, e -> new ArrayDeque<>());
}
/**
*
* Push the current UIComponent this to the {@link FacesContext} attribute map
* saving the previous UIComponent
* for a subsequent call to {@link #popComponentFromEL}.
*
*
*
* This method and popComponentFromEL() form the basis for the contract that enables the Jakarta Expression
* Language Expression "#{component}" to resolve to the "current" component that is being processed in the
* lifecycle. The requirements for when pushComponentToEL() and popComponentFromEL() must be
* called are specified as needed in the javadoc for this class.
*
*
*
* After pushComponentToEL() returns, a call to {@link #getCurrentComponent} must return this
* UIComponent instance until popComponentFromEL() is called, after which point the previous
* UIComponent instance will be returned from getCurrentComponent()
*
*
* @param context the {@link FacesContext} for the current request
* @param component the component to push to the EL. If component is null the
* UIComponent instance that this call was invoked upon will be pushed to the EL.
*
* @throws NullPointerException if context is null
*
* @see jakarta.faces.context.FacesContext#getAttributes()
*
* @since 2.0
*/
public void pushComponentToEL(FacesContext context, UIComponent component) {
if (context == null) {
throw new NullPointerException();
}
if (component == null) {
component = this;
}
Map contextAttributes = context.getAttributes();
ArrayDeque componentELStack = _getComponentELStack(_CURRENT_COMPONENT_STACK_KEY, contextAttributes);
componentELStack.push(component);
component._isPushedAsCurrentRefCount++;
// If the pushed component is a composite component, we need to update that
// stack as well
if (UIComponent.isCompositeComponent(component)) {
_getComponentELStack(_CURRENT_COMPOSITE_COMPONENT_STACK_KEY, contextAttributes).push(component);
}
}
/**
*
* Pop the current UIComponent from the {@link FacesContext} attributes map so that the previous
* UIComponent, if any, becomes the current component.
*
*
* @param context the {@link FacesContext} for the current request
*
* @throws NullPointerException if context is null
*
* @see jakarta.faces.context.FacesContext#getAttributes()
*
* @since 2.0
*/
public void popComponentFromEL(FacesContext context) {
if (context == null) {
throw new NullPointerException();
}
Map contextAttributes = context.getAttributes();
ArrayDeque componentELStack = _getComponentELStack(_CURRENT_COMPONENT_STACK_KEY, contextAttributes);
// Detect cases where the stack has become unbalanced. Due to how UIComponentBase
// implemented pushing and pooping of components from the ELContext, components
// that
// overrode just one of encodeBegin or encodeEnd, or only called super in one case
// will become unbalanced. Detect and correct for those cases here.
//
// detect case where push was never called. In that case, pop should be a no-op
if (_isPushedAsCurrentRefCount < 1) {
if (componentELStack.peek() != this) {
return;
}
LOGGER.log(Level.SEVERE, "the component(" + this + ") is the head component of the stack, but it's _isPushedAsCurrentRefCount < 1");
}
// check for the other unbalanced case, a component was pushed but never popped.
// Keep
// popping those components until we get to our component
for (UIComponent topComponent = componentELStack.peek(); topComponent != this; topComponent = componentELStack.peek()) {
topComponent.popComponentFromEL(context);
}
// pop ourselves off of the stack
componentELStack.pop();
_isPushedAsCurrentRefCount--;
// If we're a composite component, we also have to pop ourselves off of the
// composite stack
if (UIComponent.isCompositeComponent(this)) {
ArrayDeque compositeELStack = _getComponentELStack(_CURRENT_COMPOSITE_COMPONENT_STACK_KEY, contextAttributes);
if (!compositeELStack.isEmpty()) {
compositeELStack.pop();
}
}
}
/**
*
* Return true if component is a composite component, otherwise false.
*
*
* @param component the {@link UIComponent} to test
* @return true if this is a composite component, false otherwise.
* @throws NullPointerException if component is null
* @since 2.0
*/
public static boolean isCompositeComponent(UIComponent component) {
if (component == null) {
throw new NullPointerException();
}
boolean result = false;
if (null != component.isCompositeComponent) {
result = component.isCompositeComponent.booleanValue();
} else {
result = component.isCompositeComponent = component.getAttributes().containsKey(Resource.COMPONENT_RESOURCE_KEY);
}
return result;
}
/**
*
* Finds the nearest composite component parent of the specified component.
*
*
* @param component the component from which to start the search from
*
* @return if component is null, return null, otherwise search the component's
* parent hierachy for the nearest parent composite component. If no parent composite component is found, return
* null
*
* @since 2.0
*/
public static UIComponent getCompositeComponentParent(UIComponent component) {
if (component == null) {
return null;
} else {
if (component.compositeParent != null) {
return component.compositeParent;
}
UIComponent parent = component.getParent();
while (parent != null) {
if (UIComponent.isCompositeComponent(parent)) {
if (component.isInView()) {
component.compositeParent = parent;
}
return parent;
}
parent = parent.getParent();
}
return null;
}
}
/**
*
* Return the UIComponent instance that is currently processing. This is equivalent to evaluating the
* Jakarta Expression Language expression "#{component}" and doing a getValue operation on the
* resultant ValueExpression.
*
*
*
* This method must return null if there is no currently processing UIComponent
*
*
* @param context {@link FacesContext} for the request we are processing
* @return the current component, or null.
* @throws NullPointerException if context is null
*
* @since 2.0
*/
public static UIComponent getCurrentComponent(FacesContext context) {
Map contextAttributes = context.getAttributes();
ArrayDeque componentELStack = _getComponentELStack(_CURRENT_COMPONENT_STACK_KEY, contextAttributes);
return componentELStack.peek();
}
/**
*
* Return the closest ancestor component, relative to the component returned from {@link #getCurrentComponent}, that is
* a composite component, or null if no such component exists.
*
*
* @param context {@link FacesContext} for the request we are processing
* @return the current composite component, or null.
* @throws NullPointerException if context is null
*
* @since 2.0
*/
public static UIComponent getCurrentCompositeComponent(FacesContext context) {
return _getComponentELStack(_CURRENT_COMPOSITE_COMPONENT_STACK_KEY, context.getAttributes()).peek();
}
// -------------------------------------------------- Event Listener Methods
/**
*
* Add the specified {@link FacesListener} to the set of listeners registered to receive event notifications from this
* {@link UIComponent}. It is expected that {@link UIComponent} classes acting as event sources will have corresponding
* typesafe APIs for registering listeners of the required type, and the implementation of those registration methods
* will delegate to this method. For example:
*
*
*
* public class FooEvent extends FacesEvent { ... }
*
* public interface FooListener extends FacesListener {
* public void processFoo(FooEvent event);
* }
*
* public class FooComponent extends UIComponentBase {
* ...
* public void addFooListener(FooListener listener) {
* addFacesListener(listener);
* }
* public void removeFooListener(FooListener listener) {
* removeFacesListener(listener);
* }
* ...
* }
*
*
* @param listener The {@link FacesListener} to be registered
*
* @throws NullPointerException if listener is null
*/
protected abstract void addFacesListener(FacesListener listener);
/**
*
* Return an array of registered {@link FacesListener}s that are instances of the specified class. If there are no such
* registered listeners, a zero-length array is returned. The returned array can be safely be cast to an array strongly
* typed to an element type of clazz.
*
*
* @param clazz Class that must be implemented by a {@link FacesListener} for it to be returned
* @return the Faces listeners, or a zero-length array.
* @throws IllegalArgumentException if class is not, and does not implement, {@link FacesListener}
* @throws NullPointerException if clazz is null
*/
protected abstract FacesListener[] getFacesListeners(Class clazz);
/**
*
* Remove the specified {@link FacesListener} from the set of listeners registered to receive event notifications from
* this {@link UIComponent}.
*
* @param listener The {@link FacesListener} to be deregistered
*
* @throws NullPointerException if listener is null
*/
protected abstract void removeFacesListener(FacesListener listener);
/**
*
* Queue an event for broadcast at the end of the current request processing lifecycle phase. The default implementation
* in {@link UIComponentBase} must delegate this call to the queueEvent() method of the parent
* {@link UIComponent}.
*
*
* @param event {@link FacesEvent} to be queued
*
* @throws IllegalStateException if this component is not a descendant of a {@link UIViewRoot}
* @throws NullPointerException if event is null
*/
public abstract void queueEvent(FacesEvent event);
/**
*
* This implementation throws UnsupportedOperationException and is provided for the sole purpose of not
* breaking existing applications that extend this class. {@link UIComponentBase} provides the implementation of this
* method.
*
*
* @param eventClass the event class.
* @param componentListener the listener.
* @since 2.1
*/
public void subscribeToEvent(Class eventClass, ComponentSystemEventListener componentListener) {
throw new UnsupportedOperationException();
}
/**
*
* This implementation throws UnsupportedOperationException and is provided for the sole purpose of not
* breaking existing applications that extend this class. {@link UIComponentBase} provides the implementation of this
* method.
*
*
* @param eventClass the event class.
* @param componentListener the component listener.
* @since 2.1
*/
public void unsubscribeFromEvent(Class eventClass, ComponentSystemEventListener componentListener) {
throw new UnsupportedOperationException();
}
/**
*
* This implementation throws UnsupportedOperationException and is provided for the sole purpose of not
* breaking existing applications that extend this class. {@link UIComponentBase} provides the implementation of this
* method.
*
*
* @param eventClass the event class.
* @return the list of listeners, never null.
* @since 2.1
*/
@Override
public List getListenersForEventClass(Class eventClass) {
throw new UnsupportedOperationException();
}
/**
*
* Starting with "this", return the closest component in the ancestry that is a NamingContainer or
* null if none can be found.
*
*
* @return the naming container, or null.
* @since 2.0
*/
public UIComponent getNamingContainer() {
UIComponent namingContainer = this;
while (namingContainer != null) {
if (namingContainer instanceof NamingContainer) {
return namingContainer;
}
namingContainer = namingContainer.getParent();
}
return null;
}
// ------------------------------------------------ Lifecycle Phase Handlers
/**
*
* Perform the component tree processing required by the Restore View
* phase of the request processing lifecycle for all facets of this component, all children of this component, and this
* component itself, as follows.
*
*
* - Call the
restoreState() method of this component.
*
* - Call {@link UIComponent#pushComponentToEL}.
*
* - Call the
processRestoreState() method of all facets and children of this {@link UIComponent} in the
* order determined by a call to getFacetsAndChildren(). After returning
* from the processRestoreState() method on a child or facet, call
* {@link UIComponent#popComponentFromEL}
*
*
*
* This method may not be called if the state saving method is set to server.
*
*
* @param context {@link FacesContext} for the request we are processing
* @param state the state.
* @throws NullPointerException if context is null
*/
public abstract void processRestoreState(FacesContext context, Object state);
/**
*
* Perform the component tree processing required by the Apply Request
* Values phase of the request processing lifecycle for all facets of this component, all children of this
* component, and this component itself, as follows.
*
*
*
* - If the
rendered property of this {@link UIComponent} is false, skip further
* processing.
* - Call {@link #pushComponentToEL}.
*
* - Call the
processDecodes() method of all facets and children of this {@link UIComponent}, in the
* order determined by a call to getFacetsAndChildren().
*
* - Call the
decode() method of this component.
*
* - Call {@link #popComponentFromEL} from inside of a
finally block, just before returning.
*
* - If a
RuntimeException is thrown during decode processing, call {@link FacesContext#renderResponse}
* and re-throw the exception.
*
*
* @param context {@link FacesContext} for the request we are processing
*
* @throws NullPointerException if context is null
*/
public abstract void processDecodes(FacesContext context);
/**
*
* The default implementation performs the following action. If the argument event is an instance of
* {@link PostRestoreStateEvent}, call this.{@link #getValueExpression} passing the literal string
* “binding”, without the quotes, as the argument. If the result is non-null, set the value of
* the ValueExpression to be this.
*
*/
@Override
public void processEvent(ComponentSystemEvent event) throws AbortProcessingException {
if (event instanceof PostRestoreStateEvent) {
// If this component has a component value reference expression,
// make sure to populate the ValueExpression for it.
ValueExpression valueExpression = getValueExpression("binding");
if (valueExpression != null) {
valueExpression.setValue(FacesContext.getCurrentInstance().getELContext(), this);
}
isCompositeComponent = null;
}
}
/**
*
* Perform the component tree processing required by the Process
* Validations phase of the request processing lifecycle for all facets of this component, all children of this
* component, and this component itself, as follows.
*
*
*
* - If the
rendered property of this {@link UIComponent} is false, skip further
* processing.
* - Call {@link #pushComponentToEL}.
* - Call the
processValidators() method of all facets and children of this {@link UIComponent}, in the
* order determined by a call to getFacetsAndChildren().
* - After returning from calling
getFacetsAndChildren() call
* {@link UIComponent#popComponentFromEL}.
*
*
* @param context {@link FacesContext} for the request we are processing
*
* @throws NullPointerException if context is null
* @see jakarta.faces.event.PreValidateEvent
* @see jakarta.faces.event.PostValidateEvent
*/
public abstract void processValidators(FacesContext context);
/**
*
* Perform the component tree processing required by the Update Model
* Values phase of the request processing lifecycle for all facets of this component, all children of this
* component, and this component itself, as follows.
*
*
*
* - If the
rendered property of this {@link UIComponent} is false, skip further
* processing.
*
* - Call {@link #pushComponentToEL}.
*
* - Call the
processUpdates() method of all facets and children of this {@link UIComponent}, in the
* order determined by a call to getFacetsAndChildren(). After returning
* from the processUpdates() method on a child or facet, call
* {@link UIComponent#popComponentFromEL}
*
*
* @param context {@link FacesContext} for the request we are processing
*
* @throws NullPointerException if context is null
*/
public abstract void processUpdates(FacesContext context);
/**
*
* Perform the component tree processing required by the state saving portion
* of the Render Response phase of the request processing lifecycle for all facets of this component, all
* children of this component, and this component itself, as follows.
*
*
*
*
* - consult the
transient property of this component. If true, just return null.
*
* - Call {@link #pushComponentToEL}.
*
* - Call the
processSaveState() method of all facets and children of this {@link UIComponent} in the
* order determined by a call to getFacetsAndChildren(), skipping children and facets that are transient.
* Ensure that {@link #popComponentFromEL} is called correctly after each child or facet.
*
* - Call the
saveState() method of this component.
*
* - Encapsulate the child state and your state into a Serializable Object and return it.
*
*
*
*
* This method may not be called if the state saving method is set to server.
*
*
* @param context {@link FacesContext} for the request we are processing
* @return the saved state.
* @throws NullPointerException if context is null
*/
public abstract Object processSaveState(FacesContext context);
// ----------------------------------------------------- Convenience Methods
/**
*
* Convenience method to return the {@link FacesContext} instance for the current request.
*
*
* @return the Faces context.
*/
protected abstract FacesContext getFacesContext();
/**
*
* Convenience method to return the {@link Renderer} instance associated with this component, if any; otherwise, return
* null.
*
*
* @param context {@link FacesContext} for the current request
* @return the renderer, or null.
*/
protected abstract Renderer getRenderer(FacesContext context);
// --------------------------------------------------------- Package Private
static final class ComponentSystemEventListenerAdapter
implements ComponentSystemEventListener, SystemEventListener, StateHolder, FacesWrapper {
ComponentSystemEventListener wrapped;
Class instanceClass;
// -------------------------------------------------------- Constructors
ComponentSystemEventListenerAdapter() {
// necessary for state saving
}
ComponentSystemEventListenerAdapter(ComponentSystemEventListener wrapped, UIComponent component) {
this.wrapped = wrapped;
instanceClass = component.getClass();
}
// ------------------------------------ Methods from SystemEventListener
/**
* Process the event.
*
* @param event the event.
* @throws AbortProcessingException if the event processing should be aborted.
*/
@Override
public void processEvent(SystemEvent event) throws AbortProcessingException {
wrapped.processEvent((ComponentSystemEvent) event);
}
// ------------------------------------ Methods from SystemEventListener
/**
* Process the event.
*
* @param event the event.
* @throws AbortProcessingException if the event processing should be aborted.
*/
@Override
public void processEvent(ComponentSystemEvent event) throws AbortProcessingException {
wrapped.processEvent(event);
}
/**
* Is this a listener for the given component.
*
* @param component the component.
* @return true if it is a listener, false otherwise.
*/
@Override
public boolean isListenerForSource(Object component) {
if (wrapped instanceof SystemEventListener) {
return ((SystemEventListener) wrapped).isListenerForSource(component);
}
return instanceClass.isAssignableFrom(component.getClass());
}
// -------------------------------------------- Methods from StateHolder
/**
* Save the state.
*
* @param context the Faces context.
* @return the saved state.
*/
@Override
public Object saveState(FacesContext context) {
if (context == null) {
throw new NullPointerException();
}
return new Object[] { wrapped instanceof UIComponent ? null : new StateHolderSaver(context, wrapped), instanceClass };
}
/**
* Restore the state.
*
* @param context the Faces context.
* @param state the state.
*/
@Override
public void restoreState(FacesContext context, Object state) {
if (context == null) {
throw new NullPointerException();
}
if (state == null) {
return;
}
Object[] s = (Object[]) state;
Object listener = s[0];
wrapped = (ComponentSystemEventListener) (listener == null ? UIComponent.getCurrentComponent(context)
: ((StateHolderSaver) listener).restore(context));
instanceClass = (Class) s[1];
}
/**
* Get the transient flag.
*
* @return true if transient, false otherwise.
*/
@Override
public boolean isTransient() {
if (wrapped instanceof StateHolder) {
return ((StateHolder) wrapped).isTransient();
}
return false;
}
/**
* Set the transient flag.
*
*
* This is a no-op in this case.
*
*
* @param newTransientValue the new transient flag value.
*/
@Override
public void setTransient(boolean newTransientValue) {
// no-op
}
// ------------------------------------------- Methods from FacesWrapper
/**
* Get the wrapped ComponentSystemEventListener.
*
* @return the wrapped ComponentSystemEventListener.
*/
@Override
public ComponentSystemEventListener getWrapped() {
return wrapped;
}
// ------------------------------------------------------ Public Methods
@Override
public int hashCode() {
return wrapped.hashCode() ^ instanceClass.hashCode();
}
@Override
public boolean equals(Object obj) {
if (!(obj instanceof ComponentSystemEventListenerAdapter)) {
return false;
}
ComponentSystemEventListenerAdapter in = (ComponentSystemEventListenerAdapter) obj;
return wrapped.equals(in.wrapped) && instanceClass.equals(in.instanceClass);
}
} // END ComponentSystemEventListenerAdapter
// --------------------------------------------------------- Private methods
private Map wrapBundleAsMap(final ResourceBundle bundle) {
return new Map() {
// This is an immutable Map
@Override
public String toString() {
StringBuffer sb = new StringBuffer();
Iterator> entries = entrySet().iterator();
Map.Entry cur;
while (entries.hasNext()) {
cur = entries.next();
sb.append(cur.getKey()).append(": ").append(cur.getValue()).append('\n');
}
return sb.toString();
}
// Do not need to implement for immutable Map
@Override
public void clear() {
throw new UnsupportedOperationException();
}
@Override
public boolean containsKey(Object key) {
if (key != null) {
return bundle.getString(key.toString()) != null;
}
return false;
}
@Override
public boolean containsValue(Object value) {
Enumeration keys = bundle.getKeys();
while (keys.hasMoreElements()) {
if (Objects.equals(value, bundle.getString(keys.nextElement()))) {
return true;
}
}
return false;
}
@Override
public Set> entrySet() {
HashMap mappings = new HashMap<>();
Enumeration keys = bundle.getKeys();
while (keys.hasMoreElements()) {
String key = keys.nextElement();
String value = bundle.getString(key);
mappings.put(key, value);
}
return mappings.entrySet();
}
@Override
@SuppressWarnings("unchecked")
public boolean equals(Object obj) {
return !(obj == null || !(obj instanceof Map)) && entrySet().equals(((Map) obj).entrySet());
}
@Override
public String get(Object key) {
if (key == null) {
return null;
}
try {
return bundle.getString(key.toString());
} catch (MissingResourceException e) {
return "???" + key + "???";
}
}
@Override
public int hashCode() {
return bundle.hashCode();
}
@Override
public boolean isEmpty() {
return !bundle.getKeys().hasMoreElements();
}
@Override
public Set keySet() {
Set keySet = new HashSet<>();
Enumeration keys = bundle.getKeys();
while (keys.hasMoreElements()) {
keySet.add(keys.nextElement());
}
return keySet;
}
// Do not need to implement for immutable Map
@Override
public String put(String k, String v) {
throw new UnsupportedOperationException();
}
// Do not need to implement for immutable Map
@Override
public void putAll(Map m) {
throw new UnsupportedOperationException();
}
// Do not need to implement for immutable Map
@Override
public String remove(Object k) {
throw new UnsupportedOperationException();
}
@Override
public int size() {
int result = 0;
Enumeration keys = bundle.getKeys();
while (keys.hasMoreElements()) {
keys.nextElement();
result++;
}
return result;
}
@Override
public Collection values() {
List result = new ArrayList<>();
Enumeration keys = bundle.getKeys();
while (keys.hasMoreElements()) {
result.add(bundle.getString(keys.nextElement()));
}
return result;
}
};
}
private ResourceBundle findResourceBundleUnderFQCNofThis(FacesContext context) {
String className = this.getClass().getName();
Locale currentLocale = null;
UIViewRoot root = null;
ResourceBundle resourceBundle = null;
// Step 1: look for a ResourceBundle under the FQCN of this instance
if (context != null) {
if ((root = context.getViewRoot()) != null) {
currentLocale = root.getLocale();
}
}
if (currentLocale == null) {
currentLocale = Locale.getDefault();
}
try {
resourceBundle = ResourceBundle.getBundle(className, currentLocale);
} catch (MissingResourceException e) {
// It is not an error if there is no ResourceBundle
}
return resourceBundle;
}
private ResourceBundle findResourceBundleAsResource(FacesContext context) {
if (getAttributes().containsKey(COMPONENT_RESOURCE_KEY)) {
Resource ccResource = (Resource) getAttributes().get(COMPONENT_RESOURCE_KEY);
if (ccResource != null) {
ccResource = findComponentResourceBundleLocaleMatch(context, ccResource.getResourceName(), ccResource.getLibraryName());
if (ccResource != null) {
try (InputStream propertiesInputStream = ccResource.getInputStream()) {
return new PropertyResourceBundle(propertiesInputStream);
} catch (IOException ex) {
Logger.getLogger(UIComponent.class.getName()).log(SEVERE, null, ex);
}
}
}
}
return null;
}
// PENDING(rlubke): I'm sure there's a more efficient
// way to handle this.
private Resource findComponentResourceBundleLocaleMatch(FacesContext context, String resourceName, String libraryName) {
Resource result = null;
ResourceBundle resourceBundle = null;
int i;
if (-1 != (i = resourceName.lastIndexOf("."))) {
resourceName = resourceName.substring(0, i) + ".properties";
if (null != context) {
result = context.getApplication().getResourceHandler().createResource(resourceName, libraryName);
InputStream propertiesInputStream = null;
try {
propertiesInputStream = result.getInputStream();
resourceBundle = new PropertyResourceBundle(propertiesInputStream);
} catch (IOException ex) {
Logger.getLogger(UIComponent.class.getName()).log(SEVERE, null, ex);
} finally {
if (propertiesInputStream != null) {
try {
propertiesInputStream.close();
} catch (IOException ioe) {
if (LOGGER.isLoggable(SEVERE)) {
LOGGER.log(SEVERE, null, ioe);
}
}
}
}
}
}
return resourceBundle != null ? result : null;
}
// The set of ValueExpressions for this component, keyed by property
// name This collection is lazily instantiated
// The set of ValueExpressions for this component, keyed by property
// name This collection is lazily instantiated
@Deprecated
protected Map bindings = null;
}