com.sun.faces.application.view.FormOmittedChecker Maven / Gradle / Ivy
/*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
*
* Copyright (c) 1997-2012 Oracle and/or its affiliates. All rights reserved.
*
* The contents of this file are subject to the terms of either the GNU
* General Public License Version 2 only ("GPL") or the Common Development
* and Distribution License("CDDL") (collectively, the "License"). You
* may not use this file except in compliance with the License. You can
* obtain a copy of the License at
* https://glassfish.dev.java.net/public/CDDL+GPL_1_1.html
* or packager/legal/LICENSE.txt. See the License for the specific
* language governing permissions and limitations under the License.
*
* When distributing the software, include this License Header Notice in each
* file and include the License file at packager/legal/LICENSE.txt.
*
* GPL Classpath Exception:
* Oracle designates this particular file as subject to the "Classpath"
* exception as provided by Oracle in the GPL Version 2 section of the License
* file that accompanied this code.
*
* Modifications:
* If applicable, add the following below the License Header, with the fields
* enclosed by brackets [] replaced by your own identifying information:
* "Portions Copyright [year] [name of copyright owner]"
*
* Contributor(s):
* If you wish your version of this file to be governed by only the CDDL or
* only the GPL Version 2, indicate your decision by adding "[Contributor]
* elects to include this software in this distribution under the [CDDL or GPL
* Version 2] license." If you don't indicate a single choice of license, a
* recipient has the option to distribute your version of this file under
* either the CDDL, the GPL Version 2 or to extend the choice of license to
* its licensees as provided above. However, if you add GPL Version 2 code
* and therefore, elected the GPL Version 2 license, then the option applies
* only if the new code is made subject to such option by the copyright
* holder.
*/
package com.sun.faces.application.view;
import com.sun.faces.util.MessageUtils;
import java.util.EnumSet;
import java.util.List;
import java.util.Set;
import javax.faces.application.FacesMessage;
import javax.faces.component.ActionSource;
import javax.faces.component.ActionSource2;
import javax.faces.component.EditableValueHolder;
import javax.faces.component.UIComponent;
import javax.faces.component.UIForm;
import javax.faces.component.UIViewRoot;
import javax.faces.component.visit.VisitCallback;
import javax.faces.component.visit.VisitContext;
import javax.faces.component.visit.VisitHint;
import javax.faces.component.visit.VisitResult;
import javax.faces.context.FacesContext;
/**
* A convenience class that checks for omitted forms.
*/
class FormOmittedChecker {
/**
* Stores the skip hint.
*/
private static String SKIP_ITERATION_HINT = "javax.faces.visit.SKIP_ITERATION";
/**
* Constructor.
*/
private FormOmittedChecker() {
}
/**
* Check if omitted forms are present.
*
* @param context the Faces context.
*/
public static void check(FacesContext context) {
final FacesContext finalContext = context;
UIViewRoot viewRoot = context.getViewRoot();
List children = viewRoot.getChildren();
for (UIComponent child : children) {
try {
context.getAttributes().put(SKIP_ITERATION_HINT, true);
Set hints = EnumSet.of(VisitHint.SKIP_ITERATION);
VisitContext visitContext = VisitContext.createVisitContext(context, null, hints);
child.visitTree(visitContext, new VisitCallback() {
public VisitResult visit(VisitContext visitContext, UIComponent component) {
VisitResult result = VisitResult.ACCEPT;
if (isForm(component)) {
result = VisitResult.REJECT;
} else if (isInNeedOfForm(component)) {
addFormOmittedMessage(finalContext);
}
return result;
}
});
} finally {
context.getAttributes().remove(SKIP_ITERATION_HINT);
}
}
}
/**
* Is the component a form.
*
* Note normally a form inherits from UIForm, but there might be some
* component libraries out there that might not honor that. So we check the
* component family to avoid warning in cases where 3rd party form component
* that does not extend UIForm (eg. tr:form) is used.
*
* @param component the UI component.
* @return true if it is a form, false otherwise.
*/
private static boolean isForm(UIComponent component) {
return (component instanceof UIForm || (component.getFamily() != null && component.getFamily().endsWith("Form")));
}
/**
* Is the component in need of a form.
*
* @param component the UI component.
* @return true if the component is in need of a form, false otherwise.
*/
private static boolean isInNeedOfForm(UIComponent component) {
return (component instanceof ActionSource
|| component instanceof ActionSource2
|| component instanceof EditableValueHolder);
}
/**
* Add the form omitted message.
*
* @param context the Faces context.
*/
private static void addFormOmittedMessage(FacesContext context) {
String key = MessageUtils.MISSING_FORM_ERROR;
Object[] parameters = new Object[]{};
boolean missingFormReported = false;
FacesMessage message = MessageUtils.getExceptionMessage(key, parameters);
List messages = context.getMessageList();
for (FacesMessage item : messages) {
if (item.getDetail().equals(message.getDetail())) {
missingFormReported = true;
break;
}
}
if (!missingFormReported) {
message.setSeverity(FacesMessage.SEVERITY_WARN);
context.addMessage(null, message);
}
}
}