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## org.springframework.instrument.classloading
Class ShadowingClassLoader

    java.lang.Object
      java.lang.ClassLoader
          org.springframework.core.DecoratingClassLoader
              org.springframework.instrument.classloading.ShadowingClassLoader

Direct Known Subclasses:
  ResourceOverridingShadowingClassLoader

    public class ShadowingClassLoader

extends DecoratingClassLoader

ClassLoader decorator that shadows an enclosing ClassLoader, applying registered transformers to all affected classes.

Since:
  2.0
Author:
  Rob Harrop, Juergen Hoeller, Costin Leau
See Also:
  `addTransformer(java.lang.instrument.ClassFileTransformer)`, `OverridingClassLoader`

Field Summary
`static String[]` | `DEFAULT_EXCLUDED_PACKAGES` Packages that are excluded by default

Constructor Summary
`ShadowingClassLoader(ClassLoader enclosingClassLoader)` Create a new ShadowingClassLoader, decorating the given ClassLoader.

Method Summary
`void` | `addTransformer(ClassFileTransformer transformer)` Add the given ClassFileTransformer to the list of transformers that this ClassLoader will apply.
`void` | `copyTransformers(ShadowingClassLoader other)` Copy all ClassFileTransformers from the given ClassLoader to the list of transformers that this ClassLoader will apply.
`URL` | `getResource(String name)`
`InputStream` | `getResourceAsStream(String name)`
`Enumeration<URL>` | `getResources(String name)`
`protected boolean` | `isClassNameExcludedFromShadowing(String className)` Deprecated. in favor of `isEligibleForShadowing(java.lang.String)`
`protected boolean` | `isEligibleForShadowing(String className)` Determine whether the specified class is eligible for shadowing by this class loader.
`Class<?>` | `loadClass(String name)`

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

Methods inherited from class java.lang.ClassLoader
`clearAssertionStatus, defineClass, defineClass, defineClass, defineClass, definePackage, findClass, findLibrary, findLoadedClass, findResource, findResources, findSystemClass, getPackage, getPackages, getParent, getSystemClassLoader, getSystemResource, getSystemResourceAsStream, getSystemResources, loadClass, resolveClass, setClassAssertionStatus, setDefaultAssertionStatus, setPackageAssertionStatus, setSigners`

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

Field Detail

### DEFAULT_EXCLUDED_PACKAGES

    public static final String[] DEFAULT_EXCLUDED_PACKAGES

  Packages that are excluded by default

Constructor Detail

### ShadowingClassLoader

    public ShadowingClassLoader(ClassLoader enclosingClassLoader)

  Create a new ShadowingClassLoader, decorating the given ClassLoader.

  Parameters:
    `enclosingClassLoader` - the ClassLoader to decorate

Method Detail

### addTransformer

    public void addTransformer(ClassFileTransformer transformer)

  Add the given ClassFileTransformer to the list of transformers that this ClassLoader will apply.

  Parameters:
    `transformer` - the ClassFileTransformer

### copyTransformers

    public void copyTransformers(ShadowingClassLoader other)

  Copy all ClassFileTransformers from the given ClassLoader to the list of transformers that this ClassLoader will apply.

  Parameters:
    `other` - the ClassLoader to copy from

### loadClass

    public Class<?> loadClass(String name)
                       throws ClassNotFoundException

  Overrides:
    `loadClass` in class `ClassLoader`
  Throws:
    `ClassNotFoundException`

### isEligibleForShadowing

    protected boolean isEligibleForShadowing(String className)

  Determine whether the specified class is eligible for shadowing by this class loader.

  Parameters:
    `className` - the class name to check
  Returns:
    whether the specified class is eligible
  See Also:
    `DecoratingClassLoader.isExcluded(java.lang.String)`

### isClassNameExcludedFromShadowing

    protected boolean isClassNameExcludedFromShadowing(String className)

  Deprecated. in favor of `isEligibleForShadowing(java.lang.String)`

  Subclasses can override this method to specify whether or not a particular class should be excluded from shadowing.

  Parameters:
    `className` - the class name to test
  Returns:
    whether the specified class is excluded

### getResource

    public URL getResource(String name)

  Overrides:
    `getResource` in class `ClassLoader`

### getResourceAsStream

    public InputStream getResourceAsStream(String name)

  Overrides:
    `getResourceAsStream` in class `ClassLoader`

### getResources

    public Enumeration<URL> getResources(String name)
                                  throws IOException

  Overrides:
    `getResources` in class `ClassLoader`
  Throws:
    `IOException`

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