Java Class Find findClasses(String path, String packageName)

Description

find Classes

License

BSD License

Declaration

private static TreeSet<String> findClasses(String path, String packageName)
            throws MalformedURLException, IOException 

Method Source Code

//package com.java2s;
/*// w w w .j  a v a 2  s  .c o  m
 * [The "BSD licence"]
 * Copyright (c) 2012 Dandelion
 * 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 Dandelion 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 AUTHOR ``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 AUTHOR 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.
 */

import java.io.File;
import java.io.IOException;

import java.net.MalformedURLException;
import java.net.URL;

import java.util.TreeSet;
import java.util.zip.ZipEntry;
import java.util.zip.ZipInputStream;

public class Main {
    private static TreeSet<String> findClasses(String path, String packageName)
            throws MalformedURLException, IOException {
        TreeSet<String> classes = new TreeSet<String>();
        if (path.startsWith("file:") && path.contains("!")) {
            String[] split = path.split("!");
            URL jar = new URL(split[0]);
            ZipInputStream zip = new ZipInputStream(jar.openStream());
            ZipEntry entry;
            while ((entry = zip.getNextEntry()) != null) {
                if (entry.getName().endsWith(".class")) {
                    String className = entry.getName().replaceAll("[$].*", "").replaceAll("[.]class", "")
                            .replace('/', '.');
                    if (className.startsWith(packageName)) {
                        classes.add(className);
                    }
                }
            }
        }
        File dir = new File(path);
        if (!dir.exists()) {
            return classes;
        }
        File[] files = dir.listFiles();
        for (File file : files) {
            if (file.isDirectory()) {
                classes.addAll(findClasses(file.getAbsolutePath(), packageName + "." + file.getName()));
            } else if (file.getName().endsWith(".class")) {
                // Build the class name with the package name and the file after
                // removing the .class extension
                String className = packageName + '.' + file.getName().substring(0, file.getName().length() - 6);
                classes.add(className);
            }
        }
        return classes;
    }
}

Related

1. findAllClasses(String packageName)
2. findClass(String packageName, Class[] superClass)
3. findClassBase(Class clazz)
4. findClasses(String directory, String packageName)
5. findClassesAnnotatedWith(String packageName, Class a)
6. findClassesAssignableFrom(String packageName, Class assignableFrom)
7. findClassLocation(Class context)
8. findClassOriginFile(Class cls)