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EE4J Compatible Implementation for Jakarta Faces API
/*
* Copyright (c) 1997, 2018 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 com.sun.faces.renderkit.html_basic;
import java.util.Collection;
import java.util.Collections;
import java.util.LinkedList;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.faces.component.ActionSource;
import javax.faces.component.EditableValueHolder;
import javax.faces.component.UIComponent;
import javax.faces.component.behavior.AjaxBehavior;
import javax.faces.component.behavior.ClientBehavior;
import javax.faces.component.behavior.ClientBehaviorContext;
import javax.faces.component.html.HtmlCommandScript;
import javax.faces.context.FacesContext;
import javax.faces.event.AjaxBehaviorEvent;
import javax.faces.event.PhaseId;
import javax.faces.render.ClientBehaviorRenderer;
import com.sun.faces.renderkit.RenderKitUtils;
import com.sun.faces.util.FacesLogger;
import java.util.EnumSet;
import java.util.Set;
import javax.faces.component.UINamingContainer;
import javax.faces.component.search.ComponentNotFoundException;
import javax.faces.component.search.SearchExpressionContext;
import javax.faces.component.search.SearchExpressionHandler;
import javax.faces.component.search.SearchExpressionHint;
/*
*AjaxBehaviorRenderer renders Ajax behavior for a component.
* It also
*/
public class AjaxBehaviorRenderer extends ClientBehaviorRenderer {
// Log instance for this class
protected static final Logger logger = FacesLogger.RENDERKIT.getLogger();
// ------------------------------------------------------ Rendering Methods
@Override
public String getScript(ClientBehaviorContext behaviorContext,
ClientBehavior behavior) {
if (!(behavior instanceof AjaxBehavior)) {
// TODO: use MessageUtils for this error message?
throw new IllegalArgumentException(
"Instance of javax.faces.component.behavior.AjaxBehavior required: " + behavior);
}
if (((AjaxBehavior)behavior).isDisabled()) {
return null;
}
return buildAjaxCommand(behaviorContext, (AjaxBehavior)behavior);
}
@Override
public void decode(FacesContext context,
UIComponent component,
ClientBehavior behavior) {
if (null == context || null == component || null == behavior) {
throw new NullPointerException();
}
if (!(behavior instanceof AjaxBehavior)) {
// TODO: use MessageUtils for this error message?
throw new IllegalArgumentException(
"Instance of javax.faces.component.behavior.AjaxBehavior required: " + behavior);
}
AjaxBehavior ajaxBehavior = (AjaxBehavior)behavior;
// First things first - if AjaxBehavior is disabled, we are done.
if (ajaxBehavior.isDisabled()) {
return;
}
component.queueEvent(createEvent(context, component, ajaxBehavior));
if (logger.isLoggable(Level.FINE)) {
logger.fine("This command resulted in form submission " +
" AjaxBehaviorEvent queued.");
logger.log(Level.FINE,
"End decoding component {0}", component.getId());
}
}
// Creates an AjaxBehaviorEvent for the specified component/behavior
private static AjaxBehaviorEvent createEvent(
FacesContext facesContext, UIComponent component, AjaxBehavior ajaxBehavior) {
AjaxBehaviorEvent event = new AjaxBehaviorEvent(facesContext, component, ajaxBehavior);
PhaseId phaseId = isImmediate(component, ajaxBehavior) ?
PhaseId.APPLY_REQUEST_VALUES :
PhaseId.INVOKE_APPLICATION;
event.setPhaseId(phaseId);
return event;
}
// Tests whether we should perform immediate processing. Note
// that we "inherit" immediate from the parent if not specified
// on the behavior.
private static boolean isImmediate(UIComponent component,
AjaxBehavior ajaxBehavior) {
boolean immediate = false;
if (ajaxBehavior.isImmediateSet()) {
immediate = ajaxBehavior.isImmediate();
} else if (component instanceof EditableValueHolder) {
immediate = ((EditableValueHolder)component).isImmediate();
} else if (component instanceof ActionSource) {
immediate = ((ActionSource)component).isImmediate();
}
return immediate;
}
private static String buildAjaxCommand(ClientBehaviorContext behaviorContext,
AjaxBehavior ajaxBehavior) {
// First things first - if AjaxBehavior is disabled, we are done.
if (ajaxBehavior.isDisabled()) {
return null;
}
UIComponent component = behaviorContext.getComponent();
String eventName = behaviorContext.getEventName();
StringBuilder ajaxCommand = new StringBuilder(256);
Collection execute = ajaxBehavior.getExecute();
Collection render = ajaxBehavior.getRender();
String onevent = ajaxBehavior.getOnevent();
String onerror = ajaxBehavior.getOnerror();
String sourceId = behaviorContext.getSourceId();
String delay = ajaxBehavior.getDelay();
Boolean resetValues = null;
if (ajaxBehavior.isResetValuesSet()) {
resetValues = ajaxBehavior.isResetValues();
}
Collection params = behaviorContext.getParameters();
// Needed workaround for SelectManyCheckbox - if execute doesn't have sourceId,
// we need to add it - otherwise, we use the default, which is sourceId:child, which
// won't work.
ClientBehaviorContext.Parameter foundparam = null;
for (ClientBehaviorContext.Parameter param : params) {
if (param.getName().equals("incExec") && (Boolean)param.getValue()) {
foundparam = param;
}
}
if (foundparam != null && !execute.contains(sourceId)) {
execute = new LinkedList<>(execute);
execute.add(component.getClientId());
}
if (foundparam != null) {
try {
// And since this is a hack, we now try to remove the param
params.remove(foundparam);
} catch (UnsupportedOperationException uoe) {
if (logger.isLoggable(Level.FINEST)) {
logger.log(Level.FINEST, "Unsupported operation", uoe);
}
}
}
HtmlCommandScript commandScript = (component instanceof HtmlCommandScript) ? (HtmlCommandScript) component : null;
if (commandScript != null) {
String name = commandScript.getName();
if (!name.contains(".")) {
ajaxCommand.append("var ");
}
ajaxCommand.append(name).append('=').append("function(o){var o=(typeof o==='object')&&o?o:{};");
for (ClientBehaviorContext.Parameter param : params) {
ajaxCommand.append("o[");
RenderKitUtils.appendQuotedValue(ajaxCommand, param.getName());
ajaxCommand.append("]=");
Object paramValue = param.getValue();
if (paramValue == null) {
ajaxCommand.append("null");
}
else {
RenderKitUtils.appendQuotedValue(ajaxCommand, paramValue.toString());
}
ajaxCommand.append(";");
}
params = Collections.singleton(new ClientBehaviorContext.Parameter("o", null));
}
ajaxCommand.append("mojarra.ab(");
if (sourceId == null) {
ajaxCommand.append("this");
} else {
ajaxCommand.append("'");
ajaxCommand.append(sourceId);
ajaxCommand.append("'");
}
ajaxCommand.append(",");
ajaxCommand.append(commandScript == null ? "event" : "null");
ajaxCommand.append(",'");
ajaxCommand.append(eventName);
ajaxCommand.append("',");
appendIds(behaviorContext.getFacesContext(), component, ajaxCommand, execute);
ajaxCommand.append(",");
appendIds(behaviorContext.getFacesContext(), component, ajaxCommand, render);
if ((onevent != null) || (onerror != null) || (delay != null) ||
(resetValues != null) || !params.isEmpty()) {
ajaxCommand.append(",{");
if (onevent != null) {
RenderKitUtils.appendProperty(ajaxCommand, "onevent", onevent, false);
}
if (onerror != null) {
RenderKitUtils.appendProperty(ajaxCommand, "onerror", onerror, false);
}
if (delay != null) {
RenderKitUtils.appendProperty(ajaxCommand, "delay", delay, true);
}
if (resetValues != null) {
RenderKitUtils.appendProperty(ajaxCommand, "resetValues", resetValues, false);
}
if (!params.isEmpty()) {
if (commandScript != null) {
RenderKitUtils.appendProperty(ajaxCommand, "params", params.iterator().next().getName(), false);
}
else {
RenderKitUtils.appendProperty(ajaxCommand, "params", "{", false);
for (ClientBehaviorContext.Parameter param : params) {
RenderKitUtils.appendProperty(ajaxCommand,
param.getName(),
param.getValue());
}
ajaxCommand.append("}");
}
}
ajaxCommand.append("}");
}
ajaxCommand.append(")");
if (commandScript != null) {
ajaxCommand.append("}");
if (commandScript.isAutorun()) {
ajaxCommand.append(";mojarra.l(").append(commandScript.getName()).append(")");
}
}
return ajaxCommand.toString();
}
private static final Set EXPRESSION_HINTS =
EnumSet.of(SearchExpressionHint.RESOLVE_CLIENT_SIDE, SearchExpressionHint.RESOLVE_SINGLE_COMPONENT);
// Appends an ids argument to the ajax command
private static void appendIds(FacesContext facesContext,
UIComponent component,
StringBuilder builder,
Collection ids) {
if ((null == ids) || ids.isEmpty()) {
builder.append('0');
return;
}
builder.append("'");
SearchExpressionHandler handler = null;
SearchExpressionContext searchExpressionContext = null;
boolean first = true;
for (String id : ids) {
if (id.trim().length() == 0) {
continue;
}
if (!first) {
builder.append(' ');
} else {
first = false;
}
if (id.equals("@all") || id.equals("@none") ||
id.equals("@form") || id.equals("@this")) {
builder.append(id);
} else {
if (searchExpressionContext == null) {
searchExpressionContext = SearchExpressionContext.createSearchExpressionContext(
facesContext, component, EXPRESSION_HINTS, null);
}
if (handler == null) {
handler = facesContext.getApplication().getSearchExpressionHandler();
}
String resolvedClientId = null;
try {
resolvedClientId = handler.resolveClientId(searchExpressionContext, id);
} catch (ComponentNotFoundException cnfe) {
resolvedClientId = getResolvedId(component, id);
}
builder.append(resolvedClientId);
}
}
builder.append("'");
}
// Returns the resolved (client id) for a particular id.
private static String getResolvedId(UIComponent component, String id) {
UIComponent resolvedComponent = component.findComponent(id);
if (resolvedComponent == null) {
if (id.charAt(0) == UINamingContainer.getSeparatorChar(FacesContext.getCurrentInstance())) {
return id.substring(1);
}
return id;
}
return resolvedComponent.getClientId();
}
}