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package org.apache.tuscany.sca.impl;

import java.net.URLClassLoader;

import org.apache.tuscany.sca.common.xml.dom.DOMHelper;
import org.apache.tuscany.sca.contribution.Contribution;
import org.apache.tuscany.sca.contribution.java.impl.ClassLoaderModelResolver;
import org.apache.tuscany.sca.contribution.resolver.ClassReference;
import org.apache.tuscany.sca.contribution.resolver.ExtensibleModelResolver;
import org.apache.tuscany.sca.contribution.resolver.ModelResolver;
import org.apache.tuscany.sca.core.ExtensionPointRegistry;
import org.apache.tuscany.sca.core.FactoryExtensionPoint;
import org.apache.tuscany.sca.core.UtilityExtensionPoint;
import org.apache.tuscany.sca.core.invocation.ProxyFactory;
import org.apache.tuscany.sca.core.invocation.ProxyFactoryExtensionPoint;
import org.apache.tuscany.sca.databinding.jaxb.JAXBContextHelper;
import org.apache.tuscany.sca.interfacedef.java.JavaInterfaceFactory;

import sun.misc.ClassLoaderUtil;

public class ContributionHelper {

	public static void close(Contribution contribution, ExtensionPointRegistry extensionPointRegistry) {
        ClassLoader contributionClassloader = contribution.getClassLoader();  

        if (contributionClassloader == null && contribution.getModelResolver() instanceof ExtensibleModelResolver) {
            ModelResolver o = ((ExtensibleModelResolver)contribution.getModelResolver()).getModelResolverInstance(ClassReference.class);
            if (o instanceof ClassLoader) {
            	contributionClassloader = (ClassLoader)o;        
            	contribution.setClassLoader(contributionClassloader);
            }
        }
        
        UtilityExtensionPoint utilityExtensionPoint = extensionPointRegistry.getExtensionPoint(UtilityExtensionPoint.class);
        FactoryExtensionPoint factoryExtensionPoint = extensionPointRegistry.getExtensionPoint(FactoryExtensionPoint.class);

        JAXBContextHelper jaxbContextHelper = utilityExtensionPoint.getUtility(JAXBContextHelper.class);
        jaxbContextHelper.removeJAXBContextForContribution(contributionClassloader);
        
        JavaInterfaceFactory javaInterfaceFactory = factoryExtensionPoint.getFactory(JavaInterfaceFactory.class);
        javaInterfaceFactory.removeInterfacesForContribution(contributionClassloader);
        
        ProxyFactoryExtensionPoint proxyFactoryExtensionPoint = extensionPointRegistry.getExtensionPoint(ProxyFactoryExtensionPoint.class);
        ProxyFactory interfaceProxyFactory = proxyFactoryExtensionPoint.getInterfaceProxyFactory();
        interfaceProxyFactory.removeProxiesForContribution(contributionClassloader);

        DOMHelper.getInstance(extensionPointRegistry).stop();
        java.beans.Introspector.flushCaches();

        if (contributionClassloader instanceof URLClassLoader) {
            ClassLoaderUtil.releaseLoader((URLClassLoader)contributionClassloader);
        }

        if (contributionClassloader instanceof ClassLoaderModelResolver) {
        	ClassLoaderModelResolver clmr = (ClassLoaderModelResolver) contributionClassloader;
        	clmr.clear();
        }

        contribution.setClassLoader(null);
	}
	
}