Class ClassLoaderHelper

java.lang.Object

software.amazon.awssdk.utils.ClassLoaderHelper

@SdkProtectedApi
public final class ClassLoaderHelper
extends Object

Method Summary

Modifier and Type	Method	Description
static ClassLoader	classLoader(Class<?>... classes)	Attempt to get class loader that loads the classes and fallback to the thread context classloader if null.
static ClassLoader	contextClassLoader()	Attempt to get the current thread's class loader and fallback to the system classloader if null
static Class<?>	loadClass(String fqcn, boolean classesFirst, Class<?>... classes)	If classesFirst is false, loads the class via the context class loader of the current thread, and if not found, via the class loaders of the optionally specified classes in the order of their specification, and if not found, from the caller class loader as the last resort.
static Class<?>	loadClass(String fqcn, Class<?>... classes)	Loads the class via the optionally specified classes in the order of their specification, and if not found, via the context class loader of the current thread, and if not found, from the caller class loader as the last resort.

Methods inherited from class java.lang.Object

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

Method Details

loadClass

public static Class<?> loadClass(String fqcn,
 Class<?>... classes)
                          throws ClassNotFoundException

Loads the class via the optionally specified classes in the order of their specification, and if not found, via the context class loader of the current thread, and if not found, from the caller class loader as the last resort.

Parameters:

fqcn - fully qualified class name of the target class to be loaded

classes - class loader providers

Returns:

the class loaded; never null

Throws:

ClassNotFoundException - if failed to load the class

loadClass

public static Class<?> loadClass(String fqcn,
 boolean classesFirst,
 Class<?>... classes)
                          throws ClassNotFoundException

If classesFirst is false, loads the class via the context class loader of the current thread, and if not found, via the class loaders of the optionally specified classes in the order of their specification, and if not found, from the caller class loader as the last resort.

If classesFirst is true, loads the class via the optionally specified classes in the order of their specification, and if not found, via the context class loader of the current thread, and if not found, from the caller class loader as the last resort.

Parameters:

fqcn - fully qualified class name of the target class to be loaded

classesFirst - true if the class loaders of the optionally specified classes take precedence over the context class loader of the current thread; false if the opposite is true.

classes - class loader providers

Returns:

the class loaded; never null

Throws:

ClassNotFoundException - if failed to load the class

contextClassLoader

public static ClassLoader contextClassLoader()

Attempt to get the current thread's class loader and fallback to the system classloader if null

Returns:

a ClassLoader or null if none found

classLoader

public static ClassLoader classLoader(Class<?>... classes)

Attempt to get class loader that loads the classes and fallback to the thread context classloader if null.

Parameters:

classes - the classes

Returns:

a ClassLoader or null if none found