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/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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.
*/
package org.apache.commons.lang3;
import java.net.URL;
import java.net.URLClassLoader;
import java.util.Arrays;
/**
* Helps work with {@link ClassLoader}.
*
* @since 3.10
*/
public class ClassLoaderUtils {
private static final URL[] EMPTY_URL_ARRAY = new URL[] {};
/**
* Gets the system class loader's URLs, if any.
*
* @return the system class loader's URLs, if any.
* @since 3.13.0
*/
public static URL[] getSystemURLs() {
return getURLs(ClassLoader.getSystemClassLoader());
}
/**
* Gets the current thread's context class loader's URLs, if any.
*
* @return the current thread's context class loader's URLs, if any.
* @since 3.13.0
*/
public static URL[] getThreadURLs() {
return getURLs(Thread.currentThread().getContextClassLoader());
}
private static URL[] getURLs(final ClassLoader cl) {
return cl instanceof URLClassLoader ? ((URLClassLoader) cl).getURLs() : EMPTY_URL_ARRAY;
}
/**
* Converts the given class loader to a String calling {@link #toString(URLClassLoader)}.
*
* @param classLoader to URLClassLoader to convert.
* @return the formatted string.
*/
public static String toString(final ClassLoader classLoader) {
if (classLoader instanceof URLClassLoader) {
return toString((URLClassLoader) classLoader);
}
return classLoader.toString();
}
/**
* Converts the given URLClassLoader to a String in the format {@code "URLClassLoader.toString() + [URL1, URL2, ...]"}.
*
* @param classLoader to URLClassLoader to convert.
* @return the formatted string.
*/
public static String toString(final URLClassLoader classLoader) {
return classLoader + Arrays.toString(classLoader.getURLs());
}
}
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