Mega Code Archive
Classpath Utils
<![CDATA[
/**
* Redistribution and use of this software and associated documentation
* ("Software"), with or without modification, are permitted provided
* that the following conditions are met:
*
* 1. Redistributions of source code must retain copyright
* statements and notices. Redistributions must also contain a
* copy of this document.
*
* 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. The name "OpenEJB" must not be used to endorse or promote
* products derived from this Software without prior written
* permission of The OpenEJB Group. For written permission,
* please contact openejb-group@openejb.sf.net.
*
* 4. Products derived from this Software may not be called "OpenEJB"
* nor may "OpenEJB" appear in their names without prior written
* permission of The OpenEJB Group. OpenEJB is a registered
* trademark of The OpenEJB Group.
*
* 5. Due credit should be given to the OpenEJB Project
* (http://openejb.sf.net/).
*
* THIS SOFTWARE IS PROVIDED BY THE OPENEJB GROUP AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESSED 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 OPENEJB GROUP OR ITS 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.
*
* Copyright 2001 (C) The OpenEJB Group. All Rights Reserved.
*
* $Id: ClasspathUtils.java 1076 2004-03-01 07:17:26Z dblevins $
*/
import java.io.File;
import java.net.URL;
import java.net.URLClassLoader;
import java.security.AccessController;
import java.security.PrivilegedAction;
/**
*/
public class ClasspathUtils{
private static Loader tomcatLoader = new ClasspathUtils().new TomcatLoader();
private static Loader sysLoader = new ClasspathUtils().new SystemLoader();
private static Loader ctxLoader = new ClasspathUtils().new ContextLoader();
public static void addJarToPath(final File jar) throws Exception {
addJarToPath( jar.toURI().toURL() );
}
public static void addJarToPath(final URL jar) throws Exception {
getLoader().addJarToPath( jar );
}
public static void addJarToPath(final File jar, String loaderName) throws Exception {
addJarToPath( jar.toURI().toURL() , loaderName);
}
public static void addJarToPath(final URL jar, String loaderName) throws Exception {
getLoader(loaderName).addJarToPath( jar );
}
public static void addJarsToPath(final File dir) throws Exception {
if ( dir == null ) return;
getLoader().addJarsToPath( dir );
}
public static void addJarsToPath(final File dir, String loaderName) throws Exception {
getLoader(loaderName).addJarsToPath( dir );
}
/**
* Appends the jar to the classpath of the classloader passed in.
*
* @param url the URL to be added to the search path of URLs
*/
public static void addJarToSystemPath(final File jar) throws Exception {
addJarToSystemPath( jar.toURI().toURL() );
}
/**
* Appends the jar to the classpath of the classloader passed in.
*
* @param url the URL to be added to the search path of URLs
*/
public static void addJarToSystemPath(final URL jar) throws Exception {
}
protected static Loader getLoader(){
String name = getContextClassLoader().getClass().getName();
if (name.startsWith("org.apache.catalina.loader")) {
return tomcatLoader;
} else if (name.startsWith("org.apache.jasper.servlet")) {
return tomcatLoader;
} else if (name.startsWith( "sun.misc.Launcher" )) {
return sysLoader;
} else {
return ctxLoader;
}
}
protected static Loader getLoader(String name){
if (name.equalsIgnoreCase("tomcat")) {
return tomcatLoader;
} else if (name.equalsIgnoreCase("bootstrap")) {
return sysLoader;
} else if (name.equalsIgnoreCase("system")) {
return sysLoader;
} else if (name.equalsIgnoreCase("thread")) {
return ctxLoader;
} else if (name.equalsIgnoreCase("context")) {
return ctxLoader;
} else {
return ctxLoader;
}
}
public static ClassLoader getContextClassLoader() {
return (ClassLoader) java.security.AccessController.doPrivileged(
new java.security.PrivilegedAction() {
public Object run() {
return Thread.currentThread().getContextClassLoader();
}
}
);
}
public static void rebuildJavaClassPathVariable() throws Exception{
}
interface Loader {
public void addJarsToPath(File dir) throws Exception;
public void addJarToPath(URL dir) throws Exception;
}
class BasicURLLoader implements Loader{
public void addJarsToPath(File dir) throws Exception {
}
public void addJarToPath(URL jar) throws Exception {
}
private java.lang.reflect.Field ucpField;
protected void addJarToPath(final URL jar, final URLClassLoader loader) throws Exception {
this.getURLClassPath(loader).addURL( jar );
}
protected void addJarsToPath(final File dir, final URLClassLoader loader) throws Exception {
//System.out.println("DIR "+dir);
// Get the list of jars and zips
String[] jarNames = dir.list(new java.io.FilenameFilter(){
public boolean accept(File dir, String name) {
//System.out.println("FILE "+name);
return (name.endsWith(".jar") ||name.endsWith(".zip"));
}
});
// Create URLs from them
final URL[] jars = new URL[jarNames.length];
for (int j=0; j < jarNames.length; j++){
jars[j] = new File( dir, jarNames[j]).toURI().toURL();
}
sun.misc.URLClassPath path = getURLClassPath(loader);
for (int i=0; i < jars.length; i++){
//System.out.println("URL "+jars[i]);
path.addURL( jars[i] );
}
}
protected sun.misc.URLClassPath getURLClassPath(URLClassLoader loader) throws Exception{
return (sun.misc.URLClassPath)getUcpField().get(loader);
}
private java.lang.reflect.Field getUcpField() throws Exception{
if (ucpField == null) {
// Add them to the URLClassLoader's classpath
ucpField = (java.lang.reflect.Field)AccessController.doPrivileged(
new PrivilegedAction(){
public Object run() {
java.lang.reflect.Field ucp = null;
try{
ucp = URLClassLoader.class.getDeclaredField("ucp");
ucp.setAccessible(true);
} catch (Exception e2){
e2.printStackTrace();
}
return ucp;
}
}
);
}
return ucpField;
}
}
/*-------------------------------------------------------*/
/* System ClassLoader Support */
/*-------------------------------------------------------*/
class SystemLoader extends BasicURLLoader{
private URLClassLoader sysLoader;
public void addJarsToPath(File dir) throws Exception {
this.addJarsToPath( dir , getSystemLoader() );
this.rebuildJavaClassPathVariable();
}
public void addJarToPath(URL jar) throws Exception {
//System.out.println("[|] SYSTEM "+jar.toExternalForm());
this.addJarToPath( jar, getSystemLoader() );
this.rebuildJavaClassPathVariable();
}
private URLClassLoader getSystemLoader() throws Exception{
if (sysLoader == null) {
sysLoader = (java.net.URLClassLoader)ClassLoader.getSystemClassLoader();
}
return sysLoader;
}
private void rebuildJavaClassPathVariable() throws Exception{
sun.misc.URLClassPath cp = getURLClassPath(getSystemLoader());
URL[] urls = cp.getURLs();
//for (int i=0; i < urls.length; i++){
// System.out.println(urls[i].toExternalForm());
//}
if (urls.length < 1) return;
StringBuffer path = new StringBuffer(urls.length*32);
File s = new File( urls[0].getFile() );
path.append( s.getPath() );
//System.out.println(s.getPath());
for (int i=1; i < urls.length; i++){
path.append( File.pathSeparator );
s = new File( urls[i].getFile() );
//System.out.println(s.getPath());
path.append( s.getPath() );
}
try{
System.setProperty("java.class.path", path.toString() );
} catch (Exception e){}
}
}
/*-------------------------------------------------------*/
/* Thread Context ClassLoader Support */
/*-------------------------------------------------------*/
class ContextLoader extends BasicURLLoader{
public void addJarsToPath(File dir) throws Exception {
URLClassLoader loader = (URLClassLoader)ClasspathUtils.getContextClassLoader();
this.addJarsToPath( dir , loader );
}
public void addJarToPath(URL jar) throws Exception {
URLClassLoader loader = (URLClassLoader)ClasspathUtils.getContextClassLoader();
this.addJarToPath( jar, loader );
}
}
/*-------------------------------------------------------*/
/* Tomcat ClassLoader Support */
/*-------------------------------------------------------*/
class TomcatLoader extends BasicURLLoader{
/**
* The Tomcat Common ClassLoader
*/
private ClassLoader tomcatLoader;
/**
* The addRepository(String jar) method of the Tomcat Common ClassLoader
*/
private java.lang.reflect.Method addRepositoryMethod;
public void addJarsToPath(File dir) throws Exception {
String[] jarNames = dir.list(new java.io.FilenameFilter(){
public boolean accept(File dir, String name) {
//System.out.println("FILE "+name);
return (name.endsWith(".jar") ||name.endsWith(".zip"));
}
});
for (int j=0; j < jarNames.length; j++){
this.addJarToPath( new File( dir, jarNames[j]).toURL() );
}
rebuild();
}
public void addJarToPath(URL jar) throws Exception {
//System.out.println("[|] TOMCAT "+jar.toExternalForm());
this._addJarToPath(jar);
rebuild();
}
public void _addJarToPath(URL jar) throws Exception {
String path = jar.toExternalForm();
//System.out.println("[] PATH "+path);
//if (path.startsWith("file:/C")) {
// path = path.substring("file:/C".length());
// path = "file:C"+path;
//}
this.addRepository( path );
//ClassLoader cl = ClasspathUtils.getContextClassLoader();
//cl = getCommonLoader(cl);
//System.out.println("[] "+cl.getClass().getName());
//System.out.println("[] "+cl);
//
////Reloader loader = (Reloader)cl.getParent();
//cl = cl.getParent();
//java.lang.reflect.Method m = getAddRepositoryMethod( cl.getClass());
//m.invoke( cl, new Object[]{jar.toExternalForm()});
////loader.addRepository( jar.toExternalForm() );
}
public void addRepository(String path) throws Exception{
this.getAddRepositoryMethod().invoke(getCommonLoader(), new Object[]{path});
}
private void rebuild(){
try{
sun.misc.URLClassPath cp = getURLClassPath((URLClassLoader)getCommonLoader());
URL[] urls = cp.getURLs();
//for (int i=0; i < urls.length; i++){
// System.out.println(urls[i].toExternalForm());
//}
if (urls.length < 1) return;
StringBuffer path = new StringBuffer(urls.length*32);
File s = new File( urls[0].getFile() );
path.append( s.getPath() );
//System.out.println(s.getPath());
for (int i=1; i < urls.length; i++){
path.append( File.pathSeparator );
s = new File( urls[i].getFile() );
//System.out.println(s.getPath());
path.append( s.getPath() );
}
System.setProperty("java.class.path", path.toString() );
} catch (Exception e){}
}
private ClassLoader getCommonLoader(){
if (tomcatLoader == null) {
tomcatLoader = this.getCommonLoader(ClasspathUtils.getContextClassLoader()).getParent();
}
return tomcatLoader;
}
private ClassLoader getCommonLoader(ClassLoader loader){
if (loader.getClass().getName().equals("org.apache.catalina.loader.StandardClassLoader")) {
return loader;
} else {
return this.getCommonLoader(loader.getParent());
}
}
/**
* This method gets the Tomcat StandardClassLoader.addRepository method via
* reflection. This allows us to call the addRepository method for Tomcat
* integration, but doesn't require us to include or ship any Tomcat
* libraries.
*
* @param clazz
* @return
* @exception Exception
*/
private java.lang.reflect.Method getAddRepositoryMethod()
throws Exception{
if (addRepositoryMethod == null) {
final Class clazz = getCommonLoader().getClass();
this.addRepositoryMethod = (java.lang.reflect.Method)AccessController.doPrivileged(
new PrivilegedAction(){
public Object run() {
java.lang.reflect.Method method = null;
try{
method = clazz.getDeclaredMethod("addRepository",
new Class[]{String.class});
method.setAccessible(true);
} catch (Exception e2){
e2.printStackTrace();
}
return method;
}
}
);
}
return addRepositoryMethod;
}
}
}
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