| /* |
| * 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 org.apache.tomcat.util.compat; |
| |
| import javax.net.ssl.SSLEngine; |
| import javax.net.ssl.SSLServerSocket; |
| |
| import org.apache.tomcat.util.res.StringManager; |
| |
| /** |
| * This is the base implementation class for JRE compatibility and provides an |
| * implementation based on Java 7. Sub-classes may extend this class and provide |
| * alternative implementations for later JRE versions |
| */ |
| public class JreCompat { |
| |
| private static final JreCompat instance; |
| private static StringManager sm = |
| StringManager.getManager(JreCompat.class.getPackage().getName()); |
| private static final boolean jre9Available; |
| private static final boolean jre8Available; |
| |
| |
| static { |
| // This is Tomcat 8 with a minimum Java version of Java 7. The latest |
| // Java version the optional features require is Java 9. |
| // Look for the highest supported JVM first |
| if (Jre9Compat.isSupported()) { |
| instance = new Jre9Compat(); |
| jre9Available = true; |
| jre8Available = true; |
| } |
| else if (Jre8Compat.isSupported()) { |
| instance = new Jre8Compat(); |
| jre9Available = false; |
| jre8Available = true; |
| } else { |
| instance = new JreCompat(); |
| jre9Available = false; |
| jre8Available = false; |
| } |
| } |
| |
| |
| public static JreCompat getInstance() { |
| return instance; |
| } |
| |
| |
| // Java 7 implementation of Java 8 methods |
| |
| public static boolean isJre8Available() { |
| return jre8Available; |
| } |
| |
| |
| @SuppressWarnings("unused") |
| public void setUseServerCipherSuitesOrder(SSLServerSocket socket, |
| boolean useCipherSuitesOrder) { |
| throw new UnsupportedOperationException(sm.getString("jreCompat.noServerCipherSuiteOrder")); |
| } |
| |
| |
| @SuppressWarnings("unused") |
| public void setUseServerCipherSuitesOrder(SSLEngine engine, |
| boolean useCipherSuitesOrder) { |
| throw new UnsupportedOperationException(sm.getString("jreCompat.noServerCipherSuiteOrder")); |
| } |
| |
| |
| // Java 7 implementation of Java 9 methods |
| |
| public static boolean isJre9Available() { |
| return jre9Available; |
| } |
| |
| |
| /** |
| * Test if the provided exception is an instance of |
| * java.lang.reflect.InaccessibleObjectException. |
| * |
| * @param t The exception to test |
| * |
| * @return {@code true} if the exception is an instance of |
| * InaccessibleObjectException, otherwise {@code false} |
| */ |
| public boolean isInstanceOfInaccessibleObjectException(Throwable t) { |
| // Exception does not exist prior to Java 9 |
| return false; |
| } |
| } |