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One time only runtime check if MyFaces is in use

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Issue: SWF-1698
This commit is contained in:
Rossen Stoyanchev
2017-05-25 14:57:04 -04:00
parent 380de15a97
commit 5a86845b09
1 changed files with 8 additions and 22 deletions
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30
spring-faces/src/main/java/org/springframework/faces/webflow/JsfRuntimeInformation.java
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@@ -1,5 +1,5 @@
/*
* Copyright 2004-2016 the original author or authors.
* Copyright 2004-2017 the original author or authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
@@ -16,8 +16,6 @@
package org.springframework.faces.webflow;
import javax.faces.FacesWrapper;
import javax.faces.FactoryFinder;
import javax.faces.context.FacesContext;
import org.springframework.util.Assert;
@@ -77,7 +75,7 @@ public class JsfRuntimeInformation {
private static final boolean myFacesPresent =
ClassUtils.isPresent("org.apache.myfaces.webapp.MyFacesServlet", CLASSLOADER);
private static boolean myFacesInUse = isMyFacesContextFactoryInUse();
private static Boolean myFacesInUse;
private static boolean portletPresent = ClassUtils.isPresent("javax.portlet.Portlet", CLASSLOADER);
@@ -121,26 +119,14 @@ public class JsfRuntimeInformation {
}
public static boolean isMyFacesInUse() {
if (myFacesInUse) {
return true;
}
// On WebSphere MyFaces may have loaded after this class...
myFacesInUse = isMyFacesContextFactoryInUse();
return myFacesInUse;
}
private static boolean isMyFacesContextFactoryInUse() {
try {
Class<?> clazz = CLASSLOADER.loadClass("org.apache.myfaces.context.FacesContextFactoryImpl");
Object factory = FactoryFinder.getFactory(FactoryFinder.FACES_CONTEXT_FACTORY);
while (!clazz.isInstance(factory) && factory instanceof FacesWrapper) {
factory = ((FacesWrapper) factory).getWrapped();
if (myFacesInUse == null) {
FacesContext facesContext = FacesContext.getCurrentInstance();
if (facesContext == null) {
return false;
}
return (factory != null && clazz.isInstance(factory));
}
catch (Throwable ex) {
return false;
myFacesInUse = facesContext.getClass().getPackage().getName().startsWith("org.apache.myfaces.");
}
return myFacesInUse;
}