SimpleInstrumentableClassLoader (Spring Framework 4.3.30.RELEASE API)

java.lang.Object
- java.lang.ClassLoader
- - org.springframework.core.DecoratingClassLoader
  - - org.springframework.core.OverridingClassLoader
    - - org.springframework.instrument.classloading.SimpleInstrumentableClassLoader

```
@UsesJava7
public class SimpleInstrumentableClassLoader
extends OverridingClassLoader
```
Simplistic implementation of an instrumentable ClassLoader.
Usable in tests and standalone environments.
Since:
2.0
Author:
Rod Johnson, Costin Leau

Field Summary
- Fields inherited from class org.springframework.core.OverridingClassLoader
  DEFAULT_EXCLUDED_PACKAGES
- Fields inherited from class org.springframework.core.DecoratingClassLoader
  parallelCapableClassLoaderAvailable

Constructor Summary
Constructors
Constructor Description
SimpleInstrumentableClassLoader(ClassLoader parent)
Create a new SimpleInstrumentableClassLoader for the given ClassLoader.

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`void`	`addTransformer(ClassFileTransformer transformer)`	Add a `ClassFileTransformer` to be applied by this ClassLoader.
`protected byte[]`	`transformIfNecessary(String name, byte[] bytes)`	Transformation hook to be implemented by subclasses.

Methods inherited from class org.springframework.core.OverridingClassLoader
isEligibleForOverriding, loadBytesForClass, loadClass, loadClass, loadClassForOverriding, openStreamForClass

Methods inherited from class org.springframework.core.DecoratingClassLoader
excludeClass, excludePackage, isExcluded

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Constructor Detail
  - SimpleInstrumentableClassLoader
```
public SimpleInstrumentableClassLoader(ClassLoader parent)
```
    Create a new SimpleInstrumentableClassLoader for the given ClassLoader.
    Parameters:
    parent - the ClassLoader to build an instrumentable ClassLoader for
- Method Detail
  - addTransformer
```
public void addTransformer(ClassFileTransformer transformer)
```
    Add a ClassFileTransformer to be applied by this ClassLoader.
    Parameters:
    transformer - the ClassFileTransformer to register
  - transformIfNecessary
```
protected byte[] transformIfNecessary(String name,
                                      byte[] bytes)
```
    Description copied from class: OverridingClassLoader
    Transformation hook to be implemented by subclasses.
    The default implementation simply returns the given bytes as-is.
    Overrides:
    transformIfNecessary in class OverridingClassLoader
    Parameters:
    name - the fully-qualified name of the class being transformed
    bytes - the raw bytes of the class
    Returns:
    the transformed bytes (never null; same as the input bytes if the transformation produced no changes)