1/*
2 * Copyright (C) 2008 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17package com.android.internal.util;
18
19import java.lang.reflect.Method;
20
21/**
22 * Binds native framework methods and then invokes a main class with the
23 * remaining arguments.
24 */
25class WithFramework {
26
27    /**
28     * Invokes main(String[]) method on class in args[0] with args[1..n].
29     */
30    public static void main(String[] args) throws Exception {
31        if (args.length == 0) {
32            printUsage();
33            return;
34        }
35
36        Class<?> mainClass = Class.forName(args[0]);
37
38        System.loadLibrary("android_runtime");
39        if (registerNatives() < 0) {
40            throw new RuntimeException("Error registering natives.");
41        }
42
43        String[] newArgs = new String[args.length - 1];
44        System.arraycopy(args, 1, newArgs, 0, newArgs.length);
45        Method mainMethod = mainClass.getMethod("main", String[].class);
46        mainMethod.invoke(null, new Object[] { newArgs });
47    }
48
49    private static void printUsage() {
50        System.err.println("Usage: dalvikvm " + WithFramework.class.getName()
51                + " [main class] [args]");
52    }
53
54    /**
55     * Registers native functions. See AndroidRuntime.cpp.
56     */
57    static native int registerNatives();
58}
59