Package org.pentaho.platform.plugin.services.security.userrole

Class ClassloaderSwitcherInterceptor

java.lang.Object

org.pentaho.platform.plugin.services.security.userrole.ClassloaderSwitcherInterceptor

All Implemented Interfaces:

org.aopalliance.aop.Advice, org.aopalliance.intercept.Interceptor, org.aopalliance.intercept.MethodInterceptor

public class ClassloaderSwitcherInterceptor
extends Object
implements org.aopalliance.intercept.MethodInterceptor

This interceptor changes the thread context classloader to the class' current classloader.

We need this because of the ConversionServiceConverterManager which was introduced in spring-security-2.0.0.

This manager uses ClassUtils.getDefaultClassLoader() which creates new class instance using thread context classloader which differs from the current classloader of the caller class:

• thread context classloader is the org.apache.activemq.activemq-osgi
• current classloader is the spring's WebappClassLoader

When ConversionServiceConverterManager tries to cast clazz.newInstance() to the GenericConversionService it throws ClassCastException if the context classloader hadn't changed.

That's why we need to proxy all classes which might use the ConversionServiceConverterManager.

Author:

Andrei Abramov

Constructor Summary

Constructors

Constructor	Description
ClassloaderSwitcherInterceptor()

Method Summary

Modifier and Type	Method	Description
Object	invoke(org.aopalliance.intercept.MethodInvocation invocation)

Methods inherited from class java.lang.Object

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

Constructor Detail

ClassloaderSwitcherInterceptor

public ClassloaderSwitcherInterceptor()

Method Detail

invoke

public Object invoke(org.aopalliance.intercept.MethodInvocation invocation)
              throws Throwable

Specified by:

invoke in interface org.aopalliance.intercept.MethodInterceptor

Throws:

Throwable