FibonacciMaker.java revision 5692b3b0303c55524ff206dc7840ffdb1fa47628
10e49fb9243b7463835ab80ef7cc62435f55846ceJesse Wilson/* 20e49fb9243b7463835ab80ef7cc62435f55846ceJesse Wilson * Copyright (C) 2012 The Android Open Source Project 30e49fb9243b7463835ab80ef7cc62435f55846ceJesse Wilson * 40e49fb9243b7463835ab80ef7cc62435f55846ceJesse Wilson * Licensed under the Apache License, Version 2.0 (the "License"); 50e49fb9243b7463835ab80ef7cc62435f55846ceJesse Wilson * you may not use this file except in compliance with the License. 60e49fb9243b7463835ab80ef7cc62435f55846ceJesse Wilson * You may obtain a copy of the License at 70e49fb9243b7463835ab80ef7cc62435f55846ceJesse Wilson * 80e49fb9243b7463835ab80ef7cc62435f55846ceJesse Wilson * http://www.apache.org/licenses/LICENSE-2.0 90e49fb9243b7463835ab80ef7cc62435f55846ceJesse Wilson * 100e49fb9243b7463835ab80ef7cc62435f55846ceJesse Wilson * Unless required by applicable law or agreed to in writing, software 110e49fb9243b7463835ab80ef7cc62435f55846ceJesse Wilson * distributed under the License is distributed on an "AS IS" BASIS, 120e49fb9243b7463835ab80ef7cc62435f55846ceJesse Wilson * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 130e49fb9243b7463835ab80ef7cc62435f55846ceJesse Wilson * See the License for the specific language governing permissions and 140e49fb9243b7463835ab80ef7cc62435f55846ceJesse Wilson * limitations under the License. 150e49fb9243b7463835ab80ef7cc62435f55846ceJesse Wilson */ 160e49fb9243b7463835ab80ef7cc62435f55846ceJesse Wilson 170e49fb9243b7463835ab80ef7cc62435f55846ceJesse Wilsonpackage com.google.dexmaker.examples; 180e49fb9243b7463835ab80ef7cc62435f55846ceJesse Wilson 190e49fb9243b7463835ab80ef7cc62435f55846ceJesse Wilsonimport com.google.dexmaker.BinaryOp; 200e49fb9243b7463835ab80ef7cc62435f55846ceJesse Wilsonimport com.google.dexmaker.Code; 210e49fb9243b7463835ab80ef7cc62435f55846ceJesse Wilsonimport com.google.dexmaker.Comparison; 220e49fb9243b7463835ab80ef7cc62435f55846ceJesse Wilsonimport com.google.dexmaker.DexMaker; 230e49fb9243b7463835ab80ef7cc62435f55846ceJesse Wilsonimport com.google.dexmaker.Label; 240e49fb9243b7463835ab80ef7cc62435f55846ceJesse Wilsonimport com.google.dexmaker.Local; 250e49fb9243b7463835ab80ef7cc62435f55846ceJesse Wilsonimport com.google.dexmaker.MethodId; 260e49fb9243b7463835ab80ef7cc62435f55846ceJesse Wilsonimport com.google.dexmaker.TypeId; 270e49fb9243b7463835ab80ef7cc62435f55846ceJesse Wilsonimport java.io.File; 280e49fb9243b7463835ab80ef7cc62435f55846ceJesse Wilsonimport java.lang.reflect.Method; 290e49fb9243b7463835ab80ef7cc62435f55846ceJesse Wilsonimport java.lang.reflect.Modifier; 300e49fb9243b7463835ab80ef7cc62435f55846ceJesse Wilson 310e49fb9243b7463835ab80ef7cc62435f55846ceJesse Wilsonpublic final class FibonacciMaker { 320e49fb9243b7463835ab80ef7cc62435f55846ceJesse Wilson public static void main(String[] args) throws Exception { 330e49fb9243b7463835ab80ef7cc62435f55846ceJesse Wilson TypeId<?> fibonacci = TypeId.get("Lcom/google/dexmaker/examples/Fibonacci;"); 345692b3b0303c55524ff206dc7840ffdb1fa47628Jesse Wilson 350e49fb9243b7463835ab80ef7cc62435f55846ceJesse Wilson String fileName = "Fibonacci.generated"; 365692b3b0303c55524ff206dc7840ffdb1fa47628Jesse Wilson DexMaker dexMaker = new DexMaker(); 370e49fb9243b7463835ab80ef7cc62435f55846ceJesse Wilson dexMaker.declare(fibonacci, fileName, Modifier.PUBLIC, TypeId.OBJECT); 380e49fb9243b7463835ab80ef7cc62435f55846ceJesse Wilson 390e49fb9243b7463835ab80ef7cc62435f55846ceJesse Wilson MethodId<?, Integer> fib = fibonacci.getMethod(TypeId.INT, "fib", TypeId.INT); 400e49fb9243b7463835ab80ef7cc62435f55846ceJesse Wilson Code code = dexMaker.declare(fib, Modifier.PUBLIC | Modifier.STATIC); 415692b3b0303c55524ff206dc7840ffdb1fa47628Jesse Wilson 420e49fb9243b7463835ab80ef7cc62435f55846ceJesse Wilson Local<Integer> i = code.getParameter(0, TypeId.INT); 430e49fb9243b7463835ab80ef7cc62435f55846ceJesse Wilson Local<Integer> constant1 = code.newLocal(TypeId.INT); 440e49fb9243b7463835ab80ef7cc62435f55846ceJesse Wilson Local<Integer> constant2 = code.newLocal(TypeId.INT); 450e49fb9243b7463835ab80ef7cc62435f55846ceJesse Wilson Local<Integer> a = code.newLocal(TypeId.INT); 460e49fb9243b7463835ab80ef7cc62435f55846ceJesse Wilson Local<Integer> b = code.newLocal(TypeId.INT); 470e49fb9243b7463835ab80ef7cc62435f55846ceJesse Wilson Local<Integer> c = code.newLocal(TypeId.INT); 480e49fb9243b7463835ab80ef7cc62435f55846ceJesse Wilson Local<Integer> d = code.newLocal(TypeId.INT); 490e49fb9243b7463835ab80ef7cc62435f55846ceJesse Wilson Local<Integer> result = code.newLocal(TypeId.INT); 505692b3b0303c55524ff206dc7840ffdb1fa47628Jesse Wilson 510e49fb9243b7463835ab80ef7cc62435f55846ceJesse Wilson code.loadConstant(constant1, 1); 520e49fb9243b7463835ab80ef7cc62435f55846ceJesse Wilson code.loadConstant(constant2, 2); 5323abc2fe89ec3713645d64bdb74415a9090084f4Jesse Wilson Label baseCase = new Label(); 540e49fb9243b7463835ab80ef7cc62435f55846ceJesse Wilson code.compare(Comparison.LT, baseCase, i, constant2); 550e49fb9243b7463835ab80ef7cc62435f55846ceJesse Wilson code.op(BinaryOp.SUBTRACT, a, i, constant1); 560e49fb9243b7463835ab80ef7cc62435f55846ceJesse Wilson code.op(BinaryOp.SUBTRACT, b, i, constant2); 570e49fb9243b7463835ab80ef7cc62435f55846ceJesse Wilson code.invokeStatic(fib, c, a); 580e49fb9243b7463835ab80ef7cc62435f55846ceJesse Wilson code.invokeStatic(fib, d, b); 590e49fb9243b7463835ab80ef7cc62435f55846ceJesse Wilson code.op(BinaryOp.ADD, result, c, d); 600e49fb9243b7463835ab80ef7cc62435f55846ceJesse Wilson code.returnValue(result); 610e49fb9243b7463835ab80ef7cc62435f55846ceJesse Wilson code.mark(baseCase); 620e49fb9243b7463835ab80ef7cc62435f55846ceJesse Wilson code.returnValue(i); 630e49fb9243b7463835ab80ef7cc62435f55846ceJesse Wilson 640e49fb9243b7463835ab80ef7cc62435f55846ceJesse Wilson ClassLoader loader = dexMaker.generateAndLoad( 65ff314e1f06b974be78de3356a71072dbf0a450cdJesse Wilson FibonacciMaker.class.getClassLoader(), getDataDirectory()); 665692b3b0303c55524ff206dc7840ffdb1fa47628Jesse Wilson 670e49fb9243b7463835ab80ef7cc62435f55846ceJesse Wilson Class<?> fibonacciClass = loader.loadClass("com.google.dexmaker.examples.Fibonacci"); 680e49fb9243b7463835ab80ef7cc62435f55846ceJesse Wilson Method fibMethod = fibonacciClass.getMethod("fib", int.class); 690e49fb9243b7463835ab80ef7cc62435f55846ceJesse Wilson System.out.println(fibMethod.invoke(null, 8)); 700e49fb9243b7463835ab80ef7cc62435f55846ceJesse Wilson } 710e49fb9243b7463835ab80ef7cc62435f55846ceJesse Wilson 720e49fb9243b7463835ab80ef7cc62435f55846ceJesse Wilson public static File getDataDirectory() throws Exception { 730e49fb9243b7463835ab80ef7cc62435f55846ceJesse Wilson Class<?> environmentClass = Class.forName("android.os.Environment"); 740e49fb9243b7463835ab80ef7cc62435f55846ceJesse Wilson Method method = environmentClass.getMethod("getDataDirectory"); 750e49fb9243b7463835ab80ef7cc62435f55846ceJesse Wilson Object dataDirectory = method.invoke(null); 760e49fb9243b7463835ab80ef7cc62435f55846ceJesse Wilson return (File) dataDirectory; 770e49fb9243b7463835ab80ef7cc62435f55846ceJesse Wilson } 780e49fb9243b7463835ab80ef7cc62435f55846ceJesse Wilson} 79