1 /* 2 * Licensed to the Apache Software Foundation (ASF) under one or more 3 * contributor license agreements. See the NOTICE file distributed with 4 * this work for additional information regarding copyright ownership. 5 * The ASF licenses this file to You under the Apache License, Version 2.0 6 * (the "License"); you may not use this file except in compliance with 7 * the License. You may obtain a copy of the License at 8 * 9 * http://www.apache.org/licenses/LICENSE-2.0 10 * 11 * Unless required by applicable law or agreed to in writing, software 12 * distributed under the License is distributed on an "AS IS" BASIS, 13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 14 * See the License for the specific language governing permissions and 15 * limitations under the License. 16 */ 17 18 package java.lang; 19 20 /** 21 * Does nothing on Android. 22 */ 23 public final class Compiler { 24 /** 25 * Prevent this class from being instantiated. 26 */ 27 private Compiler() { 28 //do nothing 29 } 30 31 /** 32 * Executes an operation according to the specified command object. This 33 * method is the low-level interface to the JIT compiler. It may return any 34 * object or {@code null} if no JIT compiler is available. Returns null 35 * on Android, whether or not the system has a JIT. 36 * 37 * @param cmd 38 * the command object for the JIT compiler. 39 * @return the result of executing command or {@code null}. 40 */ 41 public static Object command(Object cmd) { 42 return null; 43 } 44 45 /** 46 * Compiles the specified class using the JIT compiler and indicates if 47 * compilation has been successful. Does nothing and returns false on 48 * Android. 49 * 50 * @param classToCompile 51 * java.lang.Class the class to JIT compile 52 * @return {@code true} if the compilation has been successful; 53 * {@code false} if it has failed or if there is no JIT compiler 54 * available. 55 */ 56 public static boolean compileClass(Class<?> classToCompile) { 57 return false; 58 } 59 60 /** 61 * Compiles all classes whose name matches the specified name using the JIT 62 * compiler and indicates if compilation has been successful. Does nothing 63 * and returns false on Android. 64 * 65 * @param nameRoot 66 * the string to match class names with. 67 * @return {@code true} if the compilation has been successful; 68 * {@code false} if it has failed or if there is no JIT compiler 69 * available. 70 */ 71 public static boolean compileClasses(String nameRoot) { 72 return false; 73 } 74 75 /** 76 * Disables the JIT compiler. Does nothing on Android. 77 */ 78 public static void disable() { 79 } 80 81 /** 82 * Enables the JIT compiler. Does nothing on Android. 83 */ 84 public static void enable() { 85 } 86 } 87
