de.smartics.properties.utils
Class AbstractProjectClassLoader

java.lang.Object
  java.lang.ClassLoader
      de.smartics.properties.utils.AbstractProjectClassLoader

Direct Known Subclasses:

ProjectClassLoader

public abstract class AbstractProjectClassLoader
     
     

      
      extends 
      
      ClassLoader
     
     

Base implementation of class loaders that serve classes from the given directories.

Author:

Robert Reiner

Constructor Summary

protected

AbstractProjectClassLoader(ClassLoader parent) Default constructor.

Method Summary

protected void	ensurePackageProvided(String className) Ensures that the package of a class specified by the given name is already defined.
protected Class<?>	loadClassFile(String className, File classFile) Loads the class.
protected Class<?>	loadClassFromLibrary(String className, String fileName, File dirName) Opens a reader to the class file within the archive.
protected URL	loadResourceFromLibrary(String resourceName, String fileName, File dirName) Opens a reader to the resource file within the archive.

Methods inherited from class java.lang.ClassLoader

clearAssertionStatus, defineClass, defineClass, defineClass, defineClass, definePackage, findClass, findLibrary, findLoadedClass, findResource, findResources, 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

Constructor Detail

AbstractProjectClassLoader

protected AbstractProjectClassLoader(ClassLoader parent)

Default constructor.

Parameters:

parent - the parent class loader.

Method Detail

ensurePackageProvided

protected final void ensurePackageProvided(String className)

Ensures that the package of a class specified by the given name is already defined. If it is not defined the loaded class instance will not have a package reference.

Parameters:

className - the name of the class whose package is to check to be already defined.

loadClassFile

protected final Class<?> loadClassFile(String className,
                                       File classFile)
                                throws ClassNotFoundException

Loads the class. Ensures that the package of the class is defined.

Parameters:

className - the name of the class.

classFile - the file with the binary data.

Returns:

the loaded class definition.

Throws:

ClassNotFoundException - if the class cannot be loaded.

loadClassFromLibrary

protected final Class<?> loadClassFromLibrary(String className,
                                              String fileName,
                                              File dirName)
                                       throws ClassNotFoundException

Opens a reader to the class file within the archive.

Parameters:

className - the name of the class to load.

fileName - the name of the class file to load.

dirName - the name of the directory the archive file is located.

Returns:

the reader to the source file for the given class in the archive.

Throws:

ClassNotFoundException - if the class cannot be found.

loadResourceFromLibrary

protected final URL loadResourceFromLibrary(String resourceName,
                                            String fileName,
                                            File dirName)
                                     throws IOException

Opens a reader to the resource file within the archive.

Parameters:

resourceName - the name of the resource to load.

fileName - the name of the resource file to load.

dirName - the name of the directory the archive file is located.

Returns:

the reader to the source file for the given class in the archive.

Throws:

IOException - if the class cannot be found.