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## org.springframework.core
Class DecoratingClassLoader

    java.lang.Object
      java.lang.ClassLoader
          org.springframework.core.DecoratingClassLoader

Direct Known Subclasses:
  OverridingClassLoader, ShadowingClassLoader

    public abstract class DecoratingClassLoader

extends ClassLoader

Base class for decorating ClassLoaders such as `OverridingClassLoader` and `ShadowingClassLoader`, providing common handling of excluded packages and classes.

Since:
  2.5.2
Author:
  Juergen Hoeller, Rod Johnson

Constructor Summary
`DecoratingClassLoader()` Create a new DecoratingClassLoader with no parent ClassLoader.
`DecoratingClassLoader(ClassLoader parent)` Create a new DecoratingClassLoader using the given parent ClassLoader for delegation.

Method Summary
`void` | `excludeClass(String className)` Add a class name to exclude from decoration (e.g.
`void` | `excludePackage(String packageName)` Add a package name to exclude from decoration (e.g.
`protected boolean` | `isExcluded(String className)` Determine whether the specified class is excluded from decoration by this class loader.

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

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

Constructor Detail

### DecoratingClassLoader

    public DecoratingClassLoader()

  Create a new DecoratingClassLoader with no parent ClassLoader.

### DecoratingClassLoader

    public DecoratingClassLoader(ClassLoader parent)

  Create a new DecoratingClassLoader using the given parent ClassLoader for delegation.

Method Detail

### excludePackage

    public void excludePackage(String packageName)

  Add a package name to exclude from decoration (e.g. overriding).

  Any class whose fully-qualified name starts with the name registered here will be handled by the parent ClassLoader in the usual fashion.

  Parameters:
    `packageName` - the package name to exclude

### excludeClass

    public void excludeClass(String className)

  Add a class name to exclude from decoration (e.g. overriding).

  Any class name registered here will be handled by the parent ClassLoader in the usual fashion.

  Parameters:
    `className` - the class name to exclude

### isExcluded

    protected boolean isExcluded(String className)

  Determine whether the specified class is excluded from decoration by this class loader.

  The default implementation checks against excluded packages and classes.

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

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