Java Resource Load getResources(final Pattern pattern)

Description

for all elements of java.class.path get a Collection of resources Pattern pattern = Pattern.compile(".*"); gets all resources

License

Open Source License

Parameter

Parameter	Description
pattern	the pattern to match

Return

the resources in the order they are found

Declaration

public static Collection<String> getResources(final Pattern pattern) 

Method Source Code

//package com.java2s;
/**/*from   w ww .  j a v  a  2s.c o  m*/
 * Project: phoenix-router
 * 
 * File Created at 2013-6-6
 * $Id$
 * 
 * Copyright 2010 dianping.com.
 * All rights reserved.
 *
 * This software is the confidential and proprietary information of
 * Dianping Company. ("Confidential Information").  You shall not
 * disclose such Confidential Information and shall use it only in
 * accordance with the terms of the license agreement you entered into
 * with dianping.com.
 */

import java.io.File;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Enumeration;
import java.util.regex.Pattern;
import java.util.zip.ZipEntry;
import java.util.zip.ZipException;
import java.util.zip.ZipFile;

public class Main {
    /**
     * for all elements of java.class.path get a Collection of resources Pattern
     * pattern = Pattern.compile(".*"); gets all resources
     * 
     * @param pattern
     *            the pattern to match
     * @return the resources in the order they are found
     */
    public static Collection<String> getResources(final Pattern pattern) {
        final ArrayList<String> retval = new ArrayList<String>();
        final String classPath = System.getProperty("java.class.path", ".");
        final String[] classPathElements = classPath.split(System.getProperty("path.separator"));
        for (final String element : classPathElements) {
            retval.addAll(getResources(element, pattern));
        }
        return retval;
    }

    private static Collection<String> getResources(final String element, final Pattern pattern) {
        final ArrayList<String> retval = new ArrayList<String>();
        final File file = new File(element);
        if (file.isDirectory()) {
            retval.addAll(getResourcesFromDirectory(file, pattern));
        } else {
            retval.addAll(getResourcesFromJarFile(file, pattern));
        }
        return retval;
    }

    private static Collection<String> getResourcesFromDirectory(final File directory, final Pattern pattern) {
        final ArrayList<String> retval = new ArrayList<String>();
        final File[] fileList = directory.listFiles();
        for (final File file : fileList) {
            if (file.isDirectory()) {
                retval.addAll(getResourcesFromDirectory(file, pattern));
            } else {
                final String fileName = file.getName();
                final boolean accept = pattern.matcher(fileName).matches();
                if (accept) {
                    retval.add(fileName);
                }
            }
        }
        return retval;
    }

    @SuppressWarnings("rawtypes")
    private static Collection<String> getResourcesFromJarFile(final File file, final Pattern pattern) {
        final ArrayList<String> retval = new ArrayList<String>();
        ZipFile zf;
        try {
            zf = new ZipFile(file);
        } catch (final ZipException e) {
            throw new Error(e);
        } catch (final IOException e) {
            throw new Error(e);
        }
        final Enumeration e = zf.entries();
        while (e.hasMoreElements()) {
            final ZipEntry ze = (ZipEntry) e.nextElement();
            final String fileName = ze.getName();
            final boolean accept = pattern.matcher(fileName).matches();
            if (accept) {
                retval.add(fileName);
            }
        }
        try {
            zf.close();
        } catch (final IOException e1) {
            throw new Error(e1);
        }
        return retval;
    }
}

Related

1. getResourceNamesFromDir(File dir, String extension)
2. getResourcePath()
3. getResourcePath(Class c, String name)
4. getResourceReader(final String aResName)
5. getResources(File root, File path, Vector result)
6. getResourceScripts(String path)
7. getResourcesFromDirectory(File directory)
8. getResourcesFromDirectory(final File directory, final Pattern pattern)
9. getResourcesFromJarFile(File file, String resName)