Move global EL resolvers from static variables to application variables

impl/src/main/java/com/sun/faces/application/ApplicationAssociate.java

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2021 Contributors to Eclipse Foundation.
+ * Copyright (c) 2021, 2024 Contributors to Eclipse Foundation.
  * Copyright (c) 1997, 2020 Oracle and/or its affiliates. All rights reserved.
  *
  * This program and the accompanying materials are made available under the
@@ -79,8 +79,8 @@
 import com.sun.faces.facelets.util.FunctionLibrary;
 import com.sun.faces.spi.InjectionProvider;
 import com.sun.faces.util.FacesLogger;
-
 import jakarta.el.CompositeELResolver;
+
 import jakarta.el.ELResolver;
 import jakarta.el.ExpressionFactory;
 import jakarta.faces.FacesException;
@@ -181,7 +181,6 @@ protected ApplicationAssociate initialValue() {
 
     Map<String, ApplicationResourceBundle> resourceBundles = new HashMap<>();
 
-
     public static void setCurrentInstance(ApplicationAssociate associate) {
         if (associate == null) {
             instance.remove();
@@ -473,6 +472,10 @@ public InjectionProvider getInjectionProvider() {
         return injectionProvider;
     }
 
+    public ResolversRegistry getGlobalResolversRegistry() {
+        return applicationImpl.getGlobalResolversRegistry();
+    }
+
     public void setContextName(String contextName) {
         this.contextName = contextName;
     }
@@ -569,6 +572,14 @@ public ResourceBundle getResourceBundle(FacesContext context, String var) {
         return bundle.getResourceBundle(locale);
     }
 
+    /**
+     * Returns a container with EL resolvers global to this application associate
+     * @return global EL resolvers for the current application
+     */
+    public ResolversRegistry getApplicationResolvers() {
+        return applicationImpl.getGlobalResolversRegistry();
+    }
+
     /**
      * keys: element from faces-config
      * <p>

impl/src/main/java/com/sun/faces/application/ApplicationImpl.java

@@ -1,4 +1,5 @@
 /*
+ * Copyright (c) 2024 Contributors to Eclipse Foundation.
  * Copyright (c) 1997, 2020 Oracle and/or its affiliates. All rights reserved.
  *
  * This program and the accompanying materials are made available under the
@@ -81,6 +82,7 @@ public class ApplicationImpl extends Application {
     private final InstanceFactory instanceFactory;
     private final SearchExpression searchExpression;
     private final Stage stage;
+    private final ResolversRegistry globalResolversRegistry = new ResolversRegistry();
 
     /**
      * Constructor
@@ -212,6 +214,10 @@ public CompositeELResolver getApplicationELResolvers() {
         return expressionLanguage.getApplicationELResolvers();
     }
 
+    public ResolversRegistry getGlobalResolversRegistry() {
+        return globalResolversRegistry;
+    }
+
     public FacesCompositeELResolver getCompositeELResolver() {
         return expressionLanguage.getCompositeELResolver();
     }

impl/src/main/java/com/sun/faces/application/ResolversRegistry.java

@@ -0,0 +1,43 @@
+/*
+ * Copyright (c) 2024 Contributors to Eclipse Foundation.
+ *
+ * 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.application;
+
+import com.sun.faces.context.flash.FlashELResolver;
+import com.sun.faces.el.CompositeComponentAttributesELResolver;
+import com.sun.faces.el.EmptyStringToNullELResolver;
+import com.sun.faces.el.FacesResourceBundleELResolver;
+import com.sun.faces.el.ResourceELResolver;
+import com.sun.faces.el.ScopedAttributeELResolver;
+import jakarta.el.ArrayELResolver;
+import jakarta.el.BeanELResolver;
+import jakarta.el.ListELResolver;
+import jakarta.el.MapELResolver;
+import jakarta.el.ResourceBundleELResolver;
+
+public class ResolversRegistry {
+    public final BeanELResolver BEAN_RESOLVER = new BeanELResolver();
+    public final ArrayELResolver ARRAY_RESOLVER = new ArrayELResolver();
+    public final FacesResourceBundleELResolver FACES_BUNDLE_RESOLVER = new FacesResourceBundleELResolver();
+    public final FlashELResolver FLASH_RESOLVER = new FlashELResolver();
+    public final ListELResolver LIST_RESOLVER = new ListELResolver();
+    public final MapELResolver MAP_RESOLVER = new MapELResolver();
+    public final ResourceBundleELResolver BUNDLE_RESOLVER = new ResourceBundleELResolver();
+    public final ScopedAttributeELResolver SCOPED_RESOLVER = new ScopedAttributeELResolver();
+    public final ResourceELResolver RESOURCE_RESOLVER = new ResourceELResolver();
+    public final CompositeComponentAttributesELResolver COMPOSITE_COMPONENT_ATTRIBUTES_EL_RESOLVER = new CompositeComponentAttributesELResolver();
+    public final EmptyStringToNullELResolver EMPTY_STRING_TO_NULL_RESOLVER = new EmptyStringToNullELResolver();
+
+}

impl/src/main/java/com/sun/faces/el/ELUtils.java

@@ -1,4 +1,5 @@
 /*
+ * Copyright (c) 2023, 2024 Contributors to Eclipse Foundation.
  * Copyright (c) 1997, 2020 Oracle and/or its affiliates. All rights reserved.
  *
  * This program and the accompanying materials are made available under the
@@ -30,18 +31,12 @@
 import java.util.regex.Pattern;
 
 import com.sun.faces.application.ApplicationAssociate;
+import com.sun.faces.application.ResolversRegistry;
 import com.sun.faces.config.WebConfiguration;
-import com.sun.faces.context.flash.FlashELResolver;
-
-import jakarta.el.ArrayELResolver;
-import jakarta.el.BeanELResolver;
 import jakarta.el.CompositeELResolver;
 import jakarta.el.ELContext;
 import jakarta.el.ELResolver;
 import jakarta.el.ExpressionFactory;
-import jakarta.el.ListELResolver;
-import jakarta.el.MapELResolver;
-import jakarta.el.ResourceBundleELResolver;
 import jakarta.el.ValueExpression;
 import jakarta.enterprise.inject.spi.BeanManager;
 import jakarta.faces.context.ExternalContext;
@@ -103,18 +98,6 @@ public class ELUtils {
      */
     private static final Pattern METHOD_EXPRESSION_LOOKUP = Pattern.compile(".[{]cc[.]attrs[.]\\w+[}]");
 
-    public static final ArrayELResolver ARRAY_RESOLVER = new ArrayELResolver();
-    public static final BeanELResolver BEAN_RESOLVER = new BeanELResolver();
-    public static final FacesResourceBundleELResolver FACES_BUNDLE_RESOLVER = new FacesResourceBundleELResolver();
-    public static final FlashELResolver FLASH_RESOLVER = new FlashELResolver();
-    public static final ListELResolver LIST_RESOLVER = new ListELResolver();
-    public static final MapELResolver MAP_RESOLVER = new MapELResolver();
-    public static final ResourceBundleELResolver BUNDLE_RESOLVER = new ResourceBundleELResolver();
-    public static final ScopedAttributeELResolver SCOPED_RESOLVER = new ScopedAttributeELResolver();
-    public static final ResourceELResolver RESOURCE_RESOLVER = new ResourceELResolver();
-    public static final CompositeComponentAttributesELResolver COMPOSITE_COMPONENT_ATTRIBUTES_EL_RESOLVER = new CompositeComponentAttributesELResolver();
-    public static final EmptyStringToNullELResolver EMPTY_STRING_TO_NULL_RESOLVER = new EmptyStringToNullELResolver();
-
     // ------------------------------------------------------------ Constructors
 
     private ELUtils() {
@@ -164,24 +147,25 @@ public static boolean isCompositeComponentLookupWithArgs(String expression) {
     public static void buildFacesResolver(FacesCompositeELResolver composite, ApplicationAssociate associate) {
         checkNotNull(composite, associate);
         addCDIELResolver(composite);
-        composite.add(FLASH_RESOLVER);
-        composite.addPropertyELResolver(COMPOSITE_COMPONENT_ATTRIBUTES_EL_RESOLVER);
+        ResolversRegistry elRegistry = associate.getGlobalResolversRegistry();
+        composite.add(elRegistry.FLASH_RESOLVER);
+        composite.addPropertyELResolver(elRegistry.COMPOSITE_COMPONENT_ATTRIBUTES_EL_RESOLVER);
         addELResolvers(composite, associate.getELResolversFromFacesConfig());
         composite.add(associate.getApplicationELResolvers());
 
         if (WebConfiguration.getInstance().isOptionEnabled(InterpretEmptyStringSubmittedValuesAsNull)) {
-            composite.addPropertyELResolver(EMPTY_STRING_TO_NULL_RESOLVER);
+            composite.addPropertyELResolver(elRegistry.EMPTY_STRING_TO_NULL_RESOLVER);
         }
 
-        composite.addPropertyELResolver(RESOURCE_RESOLVER);
-        composite.addPropertyELResolver(BUNDLE_RESOLVER);
-        composite.addRootELResolver(FACES_BUNDLE_RESOLVER);
+        composite.addPropertyELResolver(elRegistry.RESOURCE_RESOLVER);
+        composite.addPropertyELResolver(elRegistry.BUNDLE_RESOLVER);
+        composite.addRootELResolver(elRegistry.FACES_BUNDLE_RESOLVER);
         addEL3_0_Resolvers(composite, associate);
-        composite.addPropertyELResolver(MAP_RESOLVER);
-        composite.addPropertyELResolver(LIST_RESOLVER);
-        composite.addPropertyELResolver(ARRAY_RESOLVER);
-        composite.addPropertyELResolver(BEAN_RESOLVER);
-        composite.addRootELResolver(SCOPED_RESOLVER);
+        composite.addPropertyELResolver(elRegistry.MAP_RESOLVER);
+        composite.addPropertyELResolver(elRegistry.LIST_RESOLVER);
+        composite.addPropertyELResolver(elRegistry.ARRAY_RESOLVER);
+        composite.addPropertyELResolver(elRegistry.BEAN_RESOLVER);
+        composite.addRootELResolver(elRegistry.SCOPED_RESOLVER);
     }
 
     private static void checkNotNull(FacesCompositeELResolver composite, ApplicationAssociate associate) {