Class BoringClassLoader

java.lang.Object

java.lang.ClassLoader

clazzfish.monitor.internal.BoringClassLoader

public class BoringClassLoader
extends ClassLoader

Die Klasse BoringClassLoader is used for boring into some internals of a ClassLoader. It uses "io.github.classgraph" for boring and encapsulate the needed API calls.

Since:

2.0 (15.02.23)

Author:

oboehm

Field Summary

Fields

Modifier and Type	Field	Description
static BoringClassLoader	DEFAULT_CLOADER
static BoringClassLoader	SYSTEM_CLOADER

Method Summary

Modifier and Type	Method	Description
protected Class<?>	findClass(String name)
Set<String>	getAllPackageNames()	Gets all package names.
Set<Class<?>>	getLoadedClasses()	Gets the laoded classes which normally is stored in the classes field of the parent classloader.
Set<String>	getUnusedPackageNames()
SortedSet<URI>	getUsedClassspath()	Scans the classpath to return a set of the used classpath.
static BoringClassLoader	of(ClassLoader classLoader)	Creates a BoringClassLoader from the given classLoder.

Methods inherited from class java.lang.ClassLoader

clearAssertionStatus, defineClass, defineClass, defineClass, defineClass, definePackage, findClass, findLibrary, findLoadedClass, findResource, findResource, findResources, findSystemClass, getClassLoadingLock, getDefinedPackage, getDefinedPackages, getName, getPackage, getPackages, getParent, getPlatformClassLoader, getResource, getResourceAsStream, getResources, getSystemClassLoader, getSystemResource, getSystemResourceAsStream, getSystemResources, getUnnamedModule, isRegisteredAsParallelCapable, loadClass, loadClass, registerAsParallelCapable, resolveClass, resources, setClassAssertionStatus, setDefaultAssertionStatus, setPackageAssertionStatus, setSigners

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Details

DEFAULT_CLOADER

public static BoringClassLoader DEFAULT_CLOADER

SYSTEM_CLOADER

public static BoringClassLoader SYSTEM_CLOADER

Method Details

of

public static BoringClassLoader of(ClassLoader classLoader)

Creates a BoringClassLoader from the given classLoder. If the given classLoader itself is a BoringClassLoader it will be returned. In this case no new BoringClassLoader is created.

Parameters:

classLoader - the parent ClassLoader

Returns:

a new BoringClassLoader or the classLoader itself

getAllPackageNames

public Set<String> getAllPackageNames()

Gets all package names. Also the packages which are not yet loaded.

Returns:

set of all package names

getUnusedPackageNames

public Set<String> getUnusedPackageNames()

getLoadedClasses

public Set<Class<?>> getLoadedClasses()

Gets the laoded classes which normally is stored in the classes field of the parent classloader. But since Java 11 it is no longer possible to access this field by reflection. So now the loaded packages are scanned for the classes which might be loaded.

The actual implementation uses the DiagnosticCommand MBean as described in Stackoverflow. Other tries with e.g. with the ClassPath class from Googles Guava were not successful.

Returns:

all loaded classes

getUsedClassspath

public SortedSet<URI> getUsedClassspath()

Scans the classpath to return a set of the used classpath.

Returns:

used classpath (sorted)

findClass

protected Class<?> findClass(String name)
                      throws ClassNotFoundException

Overrides:

findClass in class ClassLoader

Throws:

ClassNotFoundException