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/*The MIT License (MIT)

Copyright (c) 2016 Muhammad Hammad

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Sogiftware.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
THE SOFTWARE.*/


package org.dvare.dynamic.loader;

import java.lang.reflect.Method;
import java.net.URL;
import java.net.URLClassLoader;

public class CustomClassLoader extends ClassLoader {
    private CustomURLClassLoader customURLClassLoader;

    public CustomClassLoader() {
        super(Thread.currentThread().getContextClassLoader());

        try {
            Method method2 = URLClassLoader.class.getDeclaredMethod("getURLs");
            method2.setAccessible(true);
            URL[] urls = (URL[]) method2.invoke((URLClassLoader) Thread.currentThread().getContextClassLoader());
            customURLClassLoader = new CustomURLClassLoader(urls, new DetectClass(this.getParent()));
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    public CustomURLClassLoader getCustomURLClassLoader() {
        return customURLClassLoader;
    }

    public void setCustomURLClassLoader(CustomURLClassLoader customURLClassLoader) {
        this.customURLClassLoader = customURLClassLoader;
    }

    @Override
    protected synchronized Class loadClass(String name, boolean resolve) throws ClassNotFoundException {
        try {
            return customURLClassLoader.findClass(name);
        } catch (ClassNotFoundException e) {
            return super.loadClass(name, resolve);
        }
    }

    public class CustomURLClassLoader extends URLClassLoader {
        private DetectClass realParent;

        public CustomURLClassLoader(URL[] urls, DetectClass realParent) {
            super(urls, null);
            this.realParent = realParent;
        }

        @Override
        public Class findClass(String name) throws ClassNotFoundException {
            try {
                Class loaded = super.findLoadedClass(name);
                if (loaded != null)
                    return loaded;
                return super.findClass(name);
            } catch (ClassNotFoundException e) {
                return realParent.loadClass(name);
            }
        }
    }

    private class DetectClass extends ClassLoader {
        public DetectClass(ClassLoader parent) {
            super(parent);
        }

        @Override
        public Class findClass(String name) throws ClassNotFoundException {
            return super.findClass(name);
        }
    }
}