// ========================================================================
// Copyright (c) 2002 Mort Bay Consulting (Australia) Pty. Ltd.
// $Id$
// ========================================================================
package org.exist.start;
import java.io.File;
import java.io.IOException;
import java.net.MalformedURLException;
import java.net.URL;
import java.net.URLClassLoader;
import java.util.StringTokenizer;
import java.util.Vector;
/**
* Class to handle CLASSPATH construction
* @author Jan Hlavat�
*/
public class Classpath {
Vector _elements = new Vector();
public Classpath()
{}
public Classpath(String initial)
{
addClasspath(initial);
}
public boolean addComponent(String component)
{
if ((component != null)&&(component.length()>0)) {
try {
File f = new File(component);
if (f.exists())
{
File key = f.getCanonicalFile();
if (!_elements.contains(key))
{
_elements.add(key);
return true;
}
}
} catch (IOException e) {}
}
return false;
}
public boolean addComponent(File component)
{
if (component != null) {
try {
if (component.exists()) {
File key = component.getCanonicalFile();
if (!_elements.contains(key)) {
_elements.add(key);
return true;
}
}
} catch (IOException e) {}
}
return false;
}
public void addClasspath(String s)
{
if (s != null)
{
StringTokenizer t = new StringTokenizer(s, File.pathSeparator);
while (t.hasMoreTokens())
{
addComponent(t.nextToken());
}
}
}
public String toString()
{
StringBuilder cp = new StringBuilder(1024);
int cnt = _elements.size();
if (cnt >= 1) {
cp.append( ((File)(_elements.elementAt(0))).getPath() );
}
for (int i=1; i < cnt; i++) {
cp.append(File.pathSeparatorChar);
cp.append( ((File)(_elements.elementAt(i))).getPath() );
}
return cp.toString();
}
public ClassLoader getClassLoader(ClassLoader parent) {
int cnt = _elements.size();
URL[] urls = new URL[cnt];
for (int i=0; i < cnt; i++) {
try {
urls[i] = ((File)(_elements.elementAt(i))).toURI().toURL();
} catch (MalformedURLException e) {}
}
if (parent == null)
parent = Thread.currentThread().getContextClassLoader();
if (parent == null) {
parent = Classpath.class.getClassLoader();
}
if (parent == null) {
parent = ClassLoader.getSystemClassLoader();
}
return new URLClassLoader(urls, parent);
}
}