Top Description Fields Constructors Methods
com.fasterxml.jackson.module.afterburner.util

public Class MyClassLoader

extends ClassLoader
Class Inheritance
Imports
java.lang.reflect.Method, java.nio.charset.Charset, java.util.concurrent.ConcurrentHashMap, java.util.logging.Level, .Logger
Class loader that is needed to load generated classes.

Field Summary

Modifier and TypeField and Description
protected final boolean
_cfgUseParentLoader

Flag that determines if we should first try to load new class using parent class loader or not; this may be done to try to force access to protected/package-access properties.

private static final ConcurrentHashMap<String, Object>
parentParallelLockMap

private static final Charset
UTF8

Constructor Summary

AccessConstructor and Description
public
MyClassLoader(ClassLoader parent, boolean tryToUseParent)

Method Summary

Modifier and TypeMethod and Description
public static boolean
canAddClassInPackageOf(Class<?> cls)

Helper method called to check whether it is acceptable to create a new class in package that given class is part of.

pack-priv Class<?>
defineClassOnParent(ClassLoader parentClassLoader, String className, byte[] byteCode, int offset, int length)

private Class<?>
findLoadedClassOnParent(ClassLoader parentClassLoader, String className)

private Object
getParentClassLoadingLock(ClassLoader
The parent ClassLoader
parentClassLoader, String
The name of the to-be-loaded class
className)

Get the class loading lock for the parent class loader for loading the named class.

public Class<?>
loadAndResolve(ClassName
Interface or abstract class that class to load should extend or implement
className, byte[] byteCode)

private Class<?>

Returns:

the loaded class, or null if the class could not be loaded on the parent classloader.
loadAndResolveUsingParentClassloader(ClassName
Interface or abstract class that class to load should extend or implement
className, byte[]
the generated bytecode for the class to load
byteCode)

Attempt to load (and resolve) the class using the parent class loader (if it is configured and present).

public static int
replaceName(byte[] byteCode, String from, String to)

private void
resolveClassOnParent(ClassLoader parentClassLoader, Class<?> clazz)

Inherited from java.lang.ClassLoader:
clearAssertionStatusdefineClassdefineClassdefineClassdefineClassdefinePackagefindClassfindClassfindLibraryfindLoadedClassfindResourcefindResourcefindResourcesfindSystemClassgetClassLoadingLockgetDefinedPackagegetDefinedPackagesgetNamegetPackagegetPackagesgetParentgetPlatformClassLoadergetResourcegetResourceAsStreamgetResourcesgetSystemClassLoadergetSystemResourcegetSystemResourceAsStreamgetSystemResourcesgetUnnamedModuleisRegisteredAsParallelCapableloadClassloadClassregisterAsParallelCapableresolveClassresourcessetClassAssertionStatussetDefaultAssertionStatussetPackageAssertionStatussetSigners

Field Detail

_cfgUseParentLoaderback to summary
protected final boolean _cfgUseParentLoader

Flag that determines if we should first try to load new class using parent class loader or not; this may be done to try to force access to protected/package-access properties.

parentParallelLockMapback to summary
private static final ConcurrentHashMap<String, Object> parentParallelLockMap
UTF8back to summary
private static final Charset UTF8

Constructor Detail

MyClassLoaderback to summary
public MyClassLoader(ClassLoader parent, boolean tryToUseParent)

Method Detail

canAddClassInPackageOfback to summary
public static boolean canAddClassInPackageOf(Class<?> cls)

Helper method called to check whether it is acceptable to create a new class in package that given class is part of. This is used to prevent certain class of failures, related to access limitations: for example, we can not add classes in sealed packages, or core Java packages (java.*).

Since
2.2.1
defineClassOnParentback to summary
pack-priv Class<?> defineClassOnParent(ClassLoader parentClassLoader, String className, byte[] byteCode, int offset, int length)
findLoadedClassOnParentback to summary
private Class<?> findLoadedClassOnParent(ClassLoader parentClassLoader, String className)
getParentClassLoadingLockback to summary
private Object getParentClassLoadingLock(ClassLoader parentClassLoader, String className)

Get the class loading lock for the parent class loader for loading the named class. This is effectively the same implementation as ClassLoader#getClassLoadingLock, but using our static parentParallelLockMap and keying off of the parent ClassLoader instance as well as the class name to load.

Parameters
parentClassLoader:ClassLoader

The parent ClassLoader

className:String

The name of the to-be-loaded class

loadAndResolveback to summary
public Class<?> loadAndResolve(ClassName className, byte[] byteCode) throws IllegalArgumentException
Parameters
className:ClassName

Interface or abstract class that class to load should extend or implement

loadAndResolveUsingParentClassloaderback to summary
private Class<?> loadAndResolveUsingParentClassloader(ClassName className, byte[] byteCode)

Attempt to load (and resolve) the class using the parent class loader (if it is configured and present). This method will return null if the parent classloader is not configured or cannot be retrieved.

Parameters
className:ClassName

Interface or abstract class that class to load should extend or implement

byteCode:byte[]

the generated bytecode for the class to load

Returns:Class<?>

the loaded class, or null if the class could not be loaded on the parent classloader.

replaceNameback to summary
public static int replaceName(byte[] byteCode, String from, String to)
resolveClassOnParentback to summary
private void resolveClassOnParent(ClassLoader parentClassLoader, Class<?> clazz)