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java/javax/el/JreCompat.java

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+/*
+ *  Licensed to the Apache Software Foundation (ASF) under one or more
+ *  contributor license agreements.  See the NOTICE file distributed with
+ *  this work for additional information regarding copyright ownership.
+ *  The ASF licenses this file to You under the Apache License, Version 2.0
+ *  (the "License"); you may not use this file except in compliance with
+ *  the License.  You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS,
+ *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ */
+package javax.el;
+
+import java.lang.reflect.AccessibleObject;
+
+/*
+ * This is cut down version of org.apache.tomcat.util.JreCompat that provides
+ * only the methods required by the EL implementation.
+ *
+ * This class is duplicated in org.apache.el.util
+ * When making changes keep the two in sync.
+ */
+class JreCompat {
+
+    private static final JreCompat instance;
+
+    static {
+        if (Jre9Compat.isSupported()) {
+            instance = new Jre9Compat();
+        } else {
+            instance = new JreCompat();
+        }
+    }
+
+
+    public static JreCompat getInstance() {
+        return instance;
+    }
+
+
+    /**
+     * Is the accessibleObject accessible (as a result of appropriate module
+     * exports) on the provided instance?
+     *
+     * @param base  The specific instance to be tested.
+     * @param accessibleObject  The method/field/constructor to be tested.
+     *
+     * @return {code true} if the AccessibleObject can be accessed otherwise
+     *         {code false}
+     */
+    public boolean canAcccess(Object base, AccessibleObject accessibleObject) {
+        // Java 8 doesn't support modules so default to true
+        return true;
+    }
+
+
+    /**
+     * Is the given class in an exported package?
+     *
+     * @param type  The class to test
+     *
+     * @return Always {@code true} for Java 8. {@code true} if the enclosing
+     *         package is exported for Java 9+
+     */
+    public boolean isExported(Class<?> type) {
+        return true;
+    }
+}