Main.java Source code

Introduction

Here is the source code for Main.java

Source

//package com.java2s;
/*
 * Copyright (C) 2014 The Android Open Source Project
 *
 * Licensed 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.
 */

import java.lang.reflect.Constructor;

import java.security.Provider;
import java.security.Security;

public class Main {
    private static void loadProviderIfNecessary(String providerClassName) {
        if (providerClassName == null) {
            return;
        }

        final Class<?> klass;
        try {
            final ClassLoader sysLoader = ClassLoader.getSystemClassLoader();
            if (sysLoader != null) {
                klass = sysLoader.loadClass(providerClassName);
            } else {
                klass = Class.forName(providerClassName);
            }
        } catch (ClassNotFoundException e) {
            e.printStackTrace();
            System.exit(1);
            return;
        }

        Constructor<?> constructor = null;
        for (Constructor<?> c : klass.getConstructors()) {
            if (c.getParameterTypes().length == 0) {
                constructor = c;
                break;
            }
        }
        if (constructor == null) {
            System.err.println("No zero-arg constructor found for " + providerClassName);
            System.exit(1);
            return;
        }

        final Object o;
        try {
            o = constructor.newInstance();
        } catch (Exception e) {
            e.printStackTrace();
            System.exit(1);
            return;
        }
        if (!(o instanceof Provider)) {
            System.err.println("Not a Provider class: " + providerClassName);
            System.exit(1);
        }

        Security.insertProviderAt((Provider) o, 1);
    }
}