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Difference between revisions of "BundleProxyClassLoader recipe"

 
Line 14: Line 14:
 
}
 
}
  
// Note: Both ClassLoader.getResources(...) and bundle.getResources(...) consult  
+
// Note: Both ClassLoader.getResources(...) and bundle.getResources(...) consult  
// the boot classloader. As a result, BundleProxyClassLoader.getResources(...)  
+
// the boot classloader. As a result, BundleProxyClassLoader.getResources(...)  
// might return duplicate results from the boot classloader. Prior to Java 5  
+
// might return duplicate results from the boot classloader. Prior to Java 5  
// Classloader.getResources was marked final. If your target environment requires
+
// Classloader.getResources was marked final. If your target environment requires
// at least Java 5 you can prevent the occurence of duplicate boot classloader  
+
// at least Java 5 you can prevent the occurence of duplicate boot classloader  
// resources by overriding ClassLoader.getResources(...) instead of  
+
// resources by overriding ClassLoader.getResources(...) instead of  
// ClassLoader.findResources(...).   
+
// ClassLoader.findResources(...).   
 
public Enumeration findResources(String name) throws IOException {
 
public Enumeration findResources(String name) throws IOException {
 
    return bundle.getResources(name);
 
    return bundle.getResources(name);

Revision as of 14:20, 7 June 2006

import java.io.IOException;
import java.net.URL;
import java.util.Enumeration;

import org.osgi.framework.Bundle;

public class BundleProxyClassLoader extends ClassLoader {

	private Bundle bundle;

	public BundleProxyClassLoader(Bundle bundle) {
	    this.bundle = bundle;
	}

	// Note: Both ClassLoader.getResources(...) and bundle.getResources(...) consult 
	// the boot classloader. As a result, BundleProxyClassLoader.getResources(...) 
	// might return duplicate results from the boot classloader. Prior to Java 5 
	// Classloader.getResources was marked final. If your target environment requires
	// at least Java 5 you can prevent the occurence of duplicate boot classloader 
	// resources by overriding ClassLoader.getResources(...) instead of 
	// ClassLoader.findResources(...).   
	public Enumeration findResources(String name) throws IOException {
	    return bundle.getResources(name);
	}
	
	public URL getResource(String name) {
	    return bundle.getResource(name);
	}

	public Class loadClass(String name) throws ClassNotFoundException {
	    return bundle.loadClass(name);
	}
}