package com.ack.tools.jarinfo;
import java.net.MalformedURLException;
import java.net.URL;
import java.net.URLClassLoader;
/**
* JarClassLoader provides a convenient abstraction for
* for loading both classes and locating resources from jar
* files whose locations are specified as URLs. It makes
* extensive use of the Java 2 URLClassLoader.
*
* @see java.net.URLClassLoader
*/
public class JarClassLoader extends URLClassLoader {
public JarClassLoader( URL url ) {
super( new URL[]{url} );
}
/**
* Creates a JarClassLoader object a URL string
*
* @param url from which to load classes and locating resources
* @exception reports problems converting string into a URL
*/
public JarClassLoader( String urlString ) throws MalformedURLException {
this( new URL( "jar:" + urlString + "!/" ) );
}
/**
* Adds urls to the JarClassLoader search path
*
* @param urls from which to load classes and locating resources
* @exception reports problems converting strings into a URLs
*/
public void addJarURLs( String[] urlStrings ) throws MalformedURLException {
if( urlStrings != null )
for( int i = 0; i < urlStrings.length; i++ )
addJarURL( urlStrings[i] );
}
/**
* Adds url to the JarClassLoader search path
*
* @param url from which to load classes and locating resources
* @exception reports problems converting string into a URL
*/
public void addJarURL( String urlString ) throws MalformedURLException {
if( urlString != null )
addURL( new URL( "jar:" + urlString + "!/" ) );
}
}