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Glassfish example source code file (ClassPathBuilder.java)

This example Glassfish source code file (ClassPathBuilder.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Java - Glassfish tags/keywords

arraylist, classloader, classloader, classpathbuilder, e, file, file, io, ioexception, ioexception, net, network, no, pattern, regex, string, string, stringbuilder, util

The Glassfish ClassPathBuilder.java source code

/*
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
 *
 * Copyright (c) 1997-2010 Oracle and/or its affiliates. All rights reserved.
 *
 * The contents of this file are subject to the terms of either the GNU
 * General Public License Version 2 only ("GPL") or the Common Development
 * and Distribution License("CDDL") (collectively, the "License").  You
 * may not use this file except in compliance with the License.  You can
 * obtain a copy of the License at
 * https://glassfish.dev.java.net/public/CDDL+GPL_1_1.html
 * or packager/legal/LICENSE.txt.  See the License for the specific
 * language governing permissions and limitations under the License.
 *
 * When distributing the software, include this License Header Notice in each
 * file and include the License file at packager/legal/LICENSE.txt.
 *
 * GPL Classpath Exception:
 * Oracle designates this particular file as subject to the "Classpath"
 * exception as provided by Oracle in the GPL Version 2 section of the License
 * file that accompanied this code.
 *
 * Modifications:
 * If applicable, add the following below the License Header, with the fields
 * enclosed by brackets [] replaced by your own identifying information:
 * "Portions Copyright [year] [name of copyright owner]"
 *
 * Contributor(s):
 * If you wish your version of this file to be governed by only the CDDL or
 * only the GPL Version 2, indicate your decision by adding "[Contributor]
 * elects to include this software in this distribution under the [CDDL or GPL
 * Version 2] license."  If you don't indicate a single choice of license, a
 * recipient has the option to distribute your version of this file under
 * either the CDDL, the GPL Version 2 or to extend the choice of license to
 * its licensees as provided above.  However, if you add GPL Version 2 code
 * and therefore, elected the GPL Version 2 license, then the option applies
 * only if the new code is made subject to such option by the copyright
 * holder.
 */

package com.sun.enterprise.glassfish.bootstrap;

import com.sun.enterprise.module.Repository;

import java.io.File;
import java.io.FileFilter;
import java.io.IOException;
import java.net.URL;
import java.net.URLClassLoader;
import java.util.ArrayList;
import java.util.List;
import java.util.regex.Pattern;

/**
 * Builds up a {@link ClassLoader}.
 *
 * @author Kohsuke Kawaguchi
 */
public final class ClassPathBuilder {
    private final List<URL> urls = new ArrayList();
    private final ClassLoader parent;

    public ClassPathBuilder(ClassLoader parent) {
        this.parent = parent;
    }

    /**
     * Adds a single jar.
     */
    public void addJar(File jar) throws IOException {
        if(!jar.exists())
            throw new IOException("No such file: "+jar);
        urls.add(jar.toURI().toURL());
    }

    /**
     * Adds a single class folder.
     */
    public void addClassFolder(File classFolder) throws IOException {
        addJar(classFolder);
    }

    /**
     * Adds all jars in the given folder.
     *
     * @param folder
     *      A directory that contains a bunch of jar files.
     * @param excludes
     *      List of jars to be excluded
     */
    public void addJarFolder(File folder, final String... excludes) throws IOException {
        if(!folder.isDirectory())
            throw new IOException("Not a directory "+folder);

        File[] children = folder.listFiles(new FileFilter() {
            public boolean accept(File pathname) {
                for (String name : excludes) {
                    if(pathname.getName().equals(name))
                        return false;   // excluded
                }
                return pathname.getPath().endsWith(".jar");
            }
        });

        if(children==null)
            return; // in a very rare race condition, the directory can disappear after we checked.

        for (File child : children) {
            addJar(child);
        }
    }

    /**
     * Looks for the child files/directories in the given folder that matches the specified GLOB patterns
     * (like "foo-*.jar") and adds them to the classpath.
     */
    public void addGlob(File folder, String... masks) throws IOException {
        StringBuilder regexp = new StringBuilder();
        for (String mask : masks) {
            if(regexp.length()>0)   regexp.append('|');
            regexp.append("(\\Q");
            regexp.append(mask.replace("?","\\E.\\Q").replace("*","\\E.*\\Q"));
            regexp.append("\\E)");
        }
        Pattern p = Pattern.compile(regexp.toString());

        File[] children = folder.listFiles();
        if(children==null)  return;
        for (File child : children) {
            if(p.matcher(child.getName()).matches())
                addJar(child);
        }
    }

    public ClassLoader create() {
        return new URLClassLoader(urls.toArray(new URL[urls.size()]),parent);
    }

    public ClassLoader createExtensible(List<Repository> repositories) {
        return new ExtensibleClassLoader(urls.toArray(new URL[urls.size()]),parent,repositories);
    }


}

Other Glassfish examples (source code examples)

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