| /* |
| * 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.aries.proxy.impl; |
| |
| import java.math.BigDecimal; |
| |
| import org.objectweb.asm.Opcodes; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| public class ProxyUtils |
| { |
| private static Logger LOGGER = LoggerFactory.getLogger(ProxyUtils.class); |
| public static final int JAVA_CLASS_VERSION = new BigDecimal(System.getProperty("java.class.version")).intValue(); |
| private static int weavingJavaVersion = -1; // initialise an invalid number |
| |
| /** |
| * Get the java version to be woven at. |
| * @return |
| */ |
| public static int getWeavingJavaVersion() { |
| if (weavingJavaVersion == -1 ) { |
| //In order to avoid an inconsistent stack error the version of the woven byte code needs to match |
| //the level of byte codes in the original class |
| switch(JAVA_CLASS_VERSION) { |
| case Opcodes.V15: |
| LOGGER.debug("Weaving to Java 15"); |
| weavingJavaVersion = Opcodes.V15; |
| break; |
| case Opcodes.V14: |
| LOGGER.debug("Weaving to Java 14"); |
| weavingJavaVersion = Opcodes.V14; |
| break; |
| case Opcodes.V13: |
| LOGGER.debug("Weaving to Java 13"); |
| weavingJavaVersion = Opcodes.V13; |
| break; |
| case Opcodes.V12: |
| LOGGER.debug("Weaving to Java 12"); |
| weavingJavaVersion = Opcodes.V12; |
| break; |
| case Opcodes.V11: |
| LOGGER.debug("Weaving to Java 11"); |
| weavingJavaVersion = Opcodes.V11; |
| break; |
| case Opcodes.V10: |
| LOGGER.debug("Weaving to Java 10"); |
| weavingJavaVersion = Opcodes.V10; |
| break; |
| case Opcodes.V9: |
| LOGGER.debug("Weaving to Java 9"); |
| weavingJavaVersion = Opcodes.V9; |
| break; |
| case Opcodes.V1_8: |
| LOGGER.debug("Weaving to Java 8"); |
| weavingJavaVersion = Opcodes.V1_8; |
| break; |
| case Opcodes.V1_7: |
| LOGGER.debug("Weaving to Java 7"); |
| weavingJavaVersion = Opcodes.V1_7; |
| break; |
| case Opcodes.V1_6: |
| LOGGER.debug("Weaving to Java 6"); |
| weavingJavaVersion = Opcodes.V1_6; |
| break; |
| case Opcodes.V1_5: |
| LOGGER.debug("Weaving to Java 5"); |
| weavingJavaVersion = Opcodes.V1_5; |
| break; |
| default: |
| //aries should work with Java 5 or above - also will highlight when a higher level (and unsupported) level of Java is released |
| throw new IllegalArgumentException("Invalid Java version " + JAVA_CLASS_VERSION); |
| } |
| } |
| return weavingJavaVersion; |
| } |
| } |