Package de.oktoflow.platform.tools.lib.loader

Class ChildFirstIndexedClassloader

java.lang.Object

java.lang.ClassLoader

de.oktoflow.platform.tools.lib.loader.ChildFirstIndexedClassloader

public class ChildFirstIndexedClassloader
extends ClassLoader

A priority (child first) class loader that takes its indexing from an index file.

Author:

ChatGPT, Holger Eichelberger, SSE

Field Summary

Fields

Modifier and Type	Field	Description
private final Map<String,String>	classIndex
private final Map<Path,JarFile>	jarCache
private final Map<String,String>	locationIndex
private final Map<String,String>	resourceIndex

Constructor Summary

Constructors

Constructor	Description
ChildFirstIndexedClassloader(LoaderIndex index, ClassLoader parent)	Creates an indexed classloader.
ChildFirstIndexedClassloader(File index, ClassLoader parent)	Creates an indexed classloader.
ChildFirstIndexedClassloader(Map<String,String> locationIndex, Map<String,String> classIndex, Map<String,String> resourceIndex, ClassLoader parent)	Creates an indexed classloader.

Method Summary

Modifier and Type	Method	Description
void	close()	Close all cached jars when unloading plugin.
protected Class<?>	findClass(String name)
URL	findResource(String name)
InputStream	getResourceAsStream(String name)
private JarFile	openJar(Path path)	Opens a Jar from a path.
private static byte[]	readAllBytes(InputStream in)	As long as readAllBytes is not available on InputStream.

Methods inherited from class java.lang.ClassLoader

clearAssertionStatus, defineClass, defineClass, defineClass, defineClass, definePackage, findClass, findLibrary, findLoadedClass, findResource, findResources, findSystemClass, getClassLoadingLock, getDefinedPackage, getDefinedPackages, getName, getPackage, getPackages, getParent, getPlatformClassLoader, getResource, 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

locationIndex

private final Map<String,String> locationIndex

classIndex

private final Map<String,String> classIndex

resourceIndex

private final Map<String,String> resourceIndex

jarCache

private final Map<Path,JarFile> jarCache

Constructor Details

ChildFirstIndexedClassloader

public ChildFirstIndexedClassloader(Map<String,String> locationIndex,
 Map<String,String> classIndex,
 Map<String,String> resourceIndex,
 ClassLoader parent)

Creates an indexed classloader.

Parameters:

classIndex - the class index (class-to-jar mapping)

resourceIndex - the resource index (class-to-jar mapping)

parent - the parent class loader

ChildFirstIndexedClassloader

public ChildFirstIndexedClassloader(LoaderIndex index,
 ClassLoader parent)

Creates an indexed classloader.

Parameters:

index - the

ChildFirstIndexedClassloader

public ChildFirstIndexedClassloader(File index,
 ClassLoader parent)
                             throws IOException

Creates an indexed classloader.

Parameters:

index - the

Throws:

IOException

Method Details

findClass

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

Overrides:

findClass in class ClassLoader

Throws:

ClassNotFoundException

readAllBytes

private static byte[] readAllBytes(InputStream in)
                            throws IOException

As long as readAllBytes is not available on InputStream. Do not use IOUtils here as plugin may not be loaded.

Parameters:

in - the input stream

Returns:

the read bytes

Throws:

IOException - if reading fails

findResource

public URL findResource(String name)

Overrides:

findResource in class ClassLoader

getResourceAsStream

public InputStream getResourceAsStream(String name)

Overrides:

getResourceAsStream in class ClassLoader

openJar

private JarFile openJar(Path path)
                 throws IllegalArgumentException

Opens a Jar from a path.

Parameters:

path - the path

Returns:

the JarFile

Throws:

IllegalArgumentException - if the file cannot be opened

close

public void close()
           throws IOException

Close all cached jars when unloading plugin.

Throws:

IOException