ij.io
Class PluginClassLoader

java.lang.Object
  extended by java.lang.ClassLoader
      extended by java.security.SecureClassLoader
          extended by java.net.URLClassLoader
              extended by ij.io.PluginClassLoader

public class PluginClassLoader
extends java.net.URLClassLoader

ImageJ uses this class loader to load plugins and resources from the plugins directory and immediate subdirectories. This class loader will also load classes and resources from JAR files.

The class loader searches for classes and resources in the following order:

  1. Plugins directory
  2. Subdirectories of the Plugins directory
  3. JAR and ZIP files in the plugins directory and subdirectories

The class loader does not recurse into subdirectories beyond the first level.


Field Summary
protected  java.lang.String path
           
 
Constructor Summary
PluginClassLoader(java.lang.String path)
          Creates a new PluginClassLoader that searches in the directory path passed as a parameter.
PluginClassLoader(java.lang.String path, boolean callSuper)
          This version of the constructor is used when ImageJ is launched using Java WebStart.
 
Method Summary
 
Methods inherited from class java.net.URLClassLoader
addURL, definePackage, findClass, findResource, findResources, getPermissions, getURLs, newInstance, newInstance
 
Methods inherited from class java.security.SecureClassLoader
defineClass, defineClass
 
Methods inherited from class java.lang.ClassLoader
clearAssertionStatus, defineClass, defineClass, defineClass, defineClass, definePackage, findLibrary, findLoadedClass, findSystemClass, getPackage, getPackages, getParent, getResource, getResourceAsStream, getResources, getSystemClassLoader, getSystemResource, getSystemResourceAsStream, getSystemResources, loadClass, loadClass, resolveClass, setClassAssertionStatus, setDefaultAssertionStatus, setPackageAssertionStatus, setSigners
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Field Detail

path

protected java.lang.String path
Constructor Detail

PluginClassLoader

public PluginClassLoader(java.lang.String path)
Creates a new PluginClassLoader that searches in the directory path passed as a parameter. The constructor automatically finds all JAR and ZIP files in the path and first level of subdirectories. The JAR and ZIP files are stored in a Vector for future searches.

Parameters:
path - the path to the plugins directory.

PluginClassLoader

public PluginClassLoader(java.lang.String path,
                         boolean callSuper)
This version of the constructor is used when ImageJ is launched using Java WebStart.