package bluej.classmgr;

import java.io.File;
import java.net.URL;
import java.net.URLClassLoader;
import java.util.ArrayList;
import java.util.List;

import bluej.utility.Utility;




| A BlueJ Project ClassLoader that can be used to load or obtain information about classes loadable in a bluej project.
| Different projects have different class loaders since they shoule each have a well defined and unique namespace.
| Every time a project is compiled, even when the compilation is started from the GUI, a new ProjectLoader is created and
| if the Extension currently have a copy of the old one it should discard it.
| Note: There is a name clash with ProjectClassLoader that should be deleted at the end of refactornig,
| unfortunately ProjectClassLoader has different semantic and it would be unvise to break the current behaviour before
| having a correct working version. This is the reason for this class being named BPClassLoader.
| it will be renamed when the new classloading is refactored and tested.
|
| @author  Damiano Bolla
|
public final class BPClassLoader
extends URLClassLoader{    
   


| Constructructor.
| @param parent the parent loader that is searched first to resolve classes.
| @param urls the list of jars and directory that are searched next.
|
public BPClassLoader(URL[] urls, ClassLoader parent)
{      
super(urls, parent);     
      }
   
   


| Compare the current array of URLS with the given one.
| Note that is the order of the array is different then the two are considered different.
| @param compare URLs to compare with the original.
| @return true if the two arrays are the same.
|

   
   
   
   
   
   
   
   
   
   
   
   
   
   
   

   
   


| Create a string with this class path as a separated list of strings.
| Note that a classpath to be used to start another local JVM cannot refer to a URL but to a local file.
| It is therefore advisable to move as much as possible from a Classpath oriented vew to a ClassLoader.
|
| @return  The classpath as string.
|
public String getClassPathAsString()
   {
      return Utility.toClasspathString(getClassPathAsFiles());     
      }

   
   


| Return the class path as an array of files.
| Note that there is no guarantee that all files are indeed local files althout this is true for the
| current BlueJ.
| @return a non null array of Files, may be empty if no library at all is defined.
|
public final List getClassPathAsFiles()
   {
      return Utility.urlsToFiles(getURLs());     
      }

   
   public String toString()
   {
      return "BPClassLoader path=" + getClassPathAsString();     
      } 
   }