io.github.lukehutch.fastclasspathscanner.classloaderhandler.Java9ClassLoaderHandler Maven / Gradle / Ivy

Go to download

Show more of this group Show more artifacts with this name
Show all versions of fast-classpath-scanner Show documentation

Uber-fast, ultra-lightweight Java classpath scanner. Scans the classpath by parsing the classfile binary format directly rather than by using reflection. See https://github.com/lukehutch/fast-classpath-scanner

There is a newer version: 4.0.0-beta-7

Show newest version

/*
 * This file is part of FastClasspathScanner.
 *
 * Author: Luke Hutchison
 *
 * Hosted at: https://github.com/lukehutch/fast-classpath-scanner
 *
 * --
 *
 * The MIT License (MIT)
 *
 * Copyright (c) 2016 Luke Hutchison
 *
 * 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 Software.
 *
 * 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 io.github.lukehutch.fastclasspathscanner.classloaderhandler;

import io.github.lukehutch.fastclasspathscanner.scanner.ClasspathOrder;
import io.github.lukehutch.fastclasspathscanner.scanner.ScanSpec;
import io.github.lukehutch.fastclasspathscanner.utils.LogNode;

/**
 * A basic ClassLoaderHandler that is able to extract the URLs from Java 9+ classloaders.
 *
 * 
 * N.B. does not honor Java 9 module module encapsulation rules.
 */
public class Java9ClassLoaderHandler implements ClassLoaderHandler {
    @Override
    public String[] handledClassLoaders() {
        return new String[] { //
                "jdk.internal.loader.ClassLoaders$AppClassLoader", //
                "jdk.internal.loader.BuiltinClassLoader" };
    }

    @Override
    public DelegationOrder getDelegationOrder(final ClassLoader classLoaderInstance) {
        return DelegationOrder.PARENT_FIRST;
    }

    @Override
    public void handle(final ScanSpec scanSpec, final ClassLoader classLoader,
            final ClasspathOrder classpathOrderOut, final LogNode log) {
        // No need to fetch classpath entries from JDK9+ modules -- they are handled a different way 
    }
}