Java Class Loader getClassInputStream(String className, ClassLoader cl)

Description

get Class Input Stream

License

Open Source License

Declaration

public static InputStream getClassInputStream(String className, ClassLoader cl) 

Method Source Code

//package com.java2s;
/*// www.ja  v  a 2 s.c  o  m
 * Copyright (c) 2015, Parallel Universe Software Co. All rights reserved.
 * 
 * This program and the accompanying materials are licensed under
 * GNU General Public License, version 2, with the Classpath Exception
 * 
 * http://openjdk.java.net/legal/gplv2+ce.html
 */

import java.io.InputStream;

public class Main {
    private static final String CLASS_FILE_NAME_EXTENSION = ".class";

    public static InputStream getClassInputStream(String className, ClassLoader cl) {
        return cl.getResourceAsStream(classToResource(className));
    }

    public static InputStream getClassInputStream(Class<?> clazz) {
        final InputStream is = getClassInputStream(clazz.getName(), clazz.getClassLoader());
        if (is == null)
            throw new UnsupportedOperationException("Class file " + clazz.getName()
                    + " could not be loaded by the class's classloader " + clazz.getClassLoader());
        return is;
    }

    public static String classToResource(String className) {
        if (className == null)
            return null;
        return className.replace('.', '/') + CLASS_FILE_NAME_EXTENSION;
    }

    public static String classToResource(Class<?> clazz) {
        if (clazz == null)
            return null;
        return classToResource(clazz.getName());
    }
}

Related

1. createClassLoader(final String[] cpEntries)
2. createClassLoader(String fileName)
3. createFallbackClassLoader(Collection files)
4. dumpClassLoader(ClassLoader cl, PrintWriter out)
5. getClass(Object classLoaderMakedObject, File file, String targetClass)
6. getClassLoader()
7. getClassLoader(File[] directories)
8. getClassLoader(String path)
9. getClassLoaderForClass(final Class clazz)