rempl-maven-plugin-1.1.1.src.main.java.com.rempl.maven.MavenClassLoader Maven / Gradle / Ivy

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Reverse Engineering Meta Programming Library (REMPL) that enables manipulations with source code meta constructs, like classes, methods, files, packages, etc. in runtime.

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/**
 * Copyright (c) 2011, REMPL.com
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1) Redistributions of source code must retain the above copyright
 * notice, this list of conditions and the following disclaimer.
 * 2) Redistributions in binary form must reproduce the above
 * copyright notice, this list of conditions and the following
 * disclaimer in the documentation and/or other materials provided
 * with the distribution.
 * 3) Neither the name of the REMPL.com nor the names of its
 * contributors may be used to endorse or promote products derived
 * from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT
 * NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
 * FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
 * THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
 * OF THE POSSIBILITY OF SUCH DAMAGE.
 */
package com.rempl.maven;

// REMPL API from com.rempl:rempl-api
import com.rempl.api.Logger;

// base classes
import java.net.URL;
import java.net.URLClassLoader;

// for manipulations with arrays
import org.apache.commons.lang.ArrayUtils;

/**
 * Wrapper around {@link URLClassLoader}.
 *
 * @author Yegor Bugayenko ([email protected])
 * @version $Id: MavenClassLoader.java 1530 2011-06-28 17:40:17Z guard $
 * @see MavenLoader
 */
final class MavenClassLoader extends URLClassLoader {

    /**
     * Public ctor.
     * @param parent Parent class loader
     * @see MavenLoader#MavenLoader(MavenResolver)
     */
    public MavenClassLoader(final ClassLoader parent) {
        super(new URL[] {}, parent);
    }

    /**
     * Appends the specified URLs to the list of URLs to search for
     * classes and resources.
     * @param urls URLs to add to search path
     */
    public void addURLs(final URL[] urls) {
        for (URL url : urls) {
            this.addURL(url);
        }
    }

    /**
     * {@inheritDoc}
     */
    @Override
    public void addURL(final URL url) {
        final URL[] urls = this.getURLs();
        if (ArrayUtils.contains(urls, url)) {
            Logger.debug(
                this,
                "#addURL(%s): duplicate",
                url.toString()
            );
        } else {
            super.addURL(url);
            Logger.debug(
                this,
                "#addURL(%s): added #%d",
                url.toString(),
                urls.length + 1
            );
        }
    }

    /**
     * {@inheritDoc}
     */
    @Override
    protected Class findClass(final String name)
        throws ClassNotFoundException {
        Logger.debug(
            this,
            "#findClass(%s)",
            name
        );
        return super.findClass(name);
    }

}