junit.runner
Class TestCaseClassLoader

java.lang.Object
  java.lang.ClassLoader
      junit.runner.TestCaseClassLoader

public class TestCaseClassLoader
extends ClassLoader

A custom class loader which enables the reloading of classes for each test run. The class loader can be configured with a list of package paths that should be excluded from loading. The loading of these packages is delegated to the system class loader. They will be shared across test runs.

The list of excluded package paths is specified in a properties file "excluded.properties" that is located in the same place as the TestCaseClassLoader class.

Known limitation: the TestCaseClassLoader cannot load classes from jar files.

Field Summary

private String[]	defaultExclusions default excluded paths
(package private) static String	EXCLUDED_FILE name of excluded properties file
private Vector	fExcluded excluded paths
private Vector	fPathItems scanned class path

Constructor Summary

TestCaseClassLoader()
Constructs a TestCaseLoader.

TestCaseClassLoader(String classPath)
Constructs a TestCaseLoader.

Method Summary

private byte[]	getClassData(File f)
URL	getResource(String name)
InputStream	getResourceAsStream(String name)
boolean	isExcluded(String name)
(package private) boolean	isJar(String pathEntry)
Class	loadClass(String name, boolean resolve)
private byte[]	loadFileData(String path, String fileName)
private byte[]	loadJarData(String path, String fileName)
private byte[]	lookupClassData(String className)
private void	readExcludedPackages()
private void	scanPath(String classPath)

Methods inherited from class java.lang.ClassLoader

clearAssertionStatus, defineClass, defineClass, defineClass, defineClass, definePackage, findClass, findLibrary, findLoadedClass, findResource, findResources, findSystemClass, getPackage, getPackages, getParent, getResources, getSystemClassLoader, getSystemResource, getSystemResourceAsStream, getSystemResources, 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

fPathItems

private Vector fPathItems

scanned class path

defaultExclusions

private String[] defaultExclusions

default excluded paths

EXCLUDED_FILE

static final String EXCLUDED_FILE

name of excluded properties file

See Also:

Constant Field Values

fExcluded

private Vector fExcluded

excluded paths

Constructor Detail

TestCaseClassLoader

public TestCaseClassLoader()

Constructs a TestCaseLoader. It scans the class path and the excluded package paths

TestCaseClassLoader

public TestCaseClassLoader(String classPath)

Constructs a TestCaseLoader. It scans the class path and the excluded package paths

Method Detail

scanPath

private void scanPath(String classPath)

getResource

public URL getResource(String name)

Overrides:

getResource in class ClassLoader

getResourceAsStream

public InputStream getResourceAsStream(String name)

Overrides:

getResourceAsStream in class ClassLoader

isExcluded

public boolean isExcluded(String name)

loadClass

public Class loadClass(String name,
                       boolean resolve)
                throws ClassNotFoundException

Overrides:

loadClass in class ClassLoader

Throws:

ClassNotFoundException

lookupClassData

private byte[] lookupClassData(String className)
                        throws ClassNotFoundException

Throws:

ClassNotFoundException

isJar

boolean isJar(String pathEntry)

loadFileData

private byte[] loadFileData(String path,
                            String fileName)

getClassData

private byte[] getClassData(File f)

loadJarData

private byte[] loadJarData(String path,
                           String fileName)

readExcludedPackages

private void readExcludedPackages()