org.springframework.context.support
Class ContextTypeMatchClassLoader

java.lang.Object
  java.lang.ClassLoader
      org.springframework.core.DecoratingClassLoader
          org.springframework.context.support.ContextTypeMatchClassLoader

All Implemented Interfaces:

SmartClassLoader

 class ContextTypeMatchClassLoader
extends DecoratingClassLoader
implements SmartClassLoader

Special variant of an overriding ClassLoader, used for temporary type matching in AbstractApplicationContext. Redefines classes from a cached byte array for every loadClass call in order to pick up recently loaded types in the parent ClassLoader.

Since:

2.5

Author:

Juergen Hoeller

See Also:

AbstractApplicationContext, ConfigurableBeanFactory.setTempClassLoader(java.lang.ClassLoader)

Nested Class Summary

private class

ContextTypeMatchClassLoader.ContextOverridingClassLoader ClassLoader to be created for each loaded class.

Field Summary

private java.util.Map<java.lang.String,byte[]>	bytesCache Cache for byte array per class name
private static java.lang.reflect.Method	findLoadedClassMethod

Constructor Summary

ContextTypeMatchClassLoader(java.lang.ClassLoader parent)

Method Summary

boolean	isClassReloadable(java.lang.Class clazz) Determine whether the given class is reloadable (in this ClassLoader).
java.lang.Class	loadClass(java.lang.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, getResource, getResourceAsStream, getResources, 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

findLoadedClassMethod

private static java.lang.reflect.Method findLoadedClassMethod

bytesCache

private final java.util.Map<java.lang.String,byte[]> bytesCache

Cache for byte array per class name

Constructor Detail

ContextTypeMatchClassLoader

public ContextTypeMatchClassLoader(java.lang.ClassLoader parent)

Method Detail

loadClass

public java.lang.Class loadClass(java.lang.String name)
                          throws java.lang.ClassNotFoundException

Overrides:

loadClass in class java.lang.ClassLoader

Throws:

java.lang.ClassNotFoundException

isClassReloadable

public boolean isClassReloadable(java.lang.Class clazz)

Description copied from interface: SmartClassLoader

Determine whether the given class is reloadable (in this ClassLoader).

Typically used to check whether the result may be cached (for this ClassLoader) or whether it should be reobtained every time.

Specified by:

isClassReloadable in interface SmartClassLoader

Parameters:

clazz - the class to check (usually loaded from this ClassLoader)

Returns:

whether the class should be expected to appear in a reloaded version (with a different Class object) later on