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package com.sun.enterprise.security.appclient;

import com.sun.enterprise.iiop.security.AlternateSecurityInterceptorFactory;
import com.sun.enterprise.iiop.security.SecClientRequestInterceptor;
import com.sun.logging.LogDomains;
import java.util.logging.Level;
import java.util.logging.Logger;

import org.glassfish.api.admin.ProcessEnvironment;

import org.glassfish.enterprise.iiop.api.IIOPInterceptorFactory;


import org.jvnet.hk2.annotations.Service;
import javax.inject.Singleton;

import org.omg.IOP.Codec;
import org.omg.PortableInterceptor.ClientRequestInterceptor;
import org.omg.PortableInterceptor.ORBInitInfo;
import org.omg.PortableInterceptor.ServerRequestInterceptor;

import javax.inject.Inject;

/**
 *
 * @author Kumar
 */
@Service(name="ClientSecurityInterceptorFactory")
@Singleton
public class AppclientIIOPInterceptorFactory implements IIOPInterceptorFactory {

    private static Logger _logger = null;
    final String interceptorFactory =
            System.getProperty(AlternateSecurityInterceptorFactory.SEC_INTEROP_INTFACTORY_PROP);

    static {
        _logger = LogDomains.getLogger(AppclientIIOPInterceptorFactory.class, LogDomains.SECURITY_LOGGER);
    }
    private ClientRequestInterceptor creq;
    @Inject
    private ProcessEnvironment penv;

    private AlternateSecurityInterceptorFactory altSecFactory;
    
    // are we supposed to add the interceptor and then return or just return an instance ?.
    public ClientRequestInterceptor createClientRequestInterceptor(ORBInitInfo info, Codec codec) {
        if (penv.getProcessType().isServer()) {
            return null;
        }
        if (altSecFactory != null ||
                (interceptorFactory != null && createAlternateSecurityInterceptorFactory())) {
            return altSecFactory.getClientRequestInterceptor(codec);
        }
        ClientRequestInterceptor ret = getClientInterceptorInstance(codec);
        return ret;
    }

    public ServerRequestInterceptor createServerRequestInterceptor(ORBInitInfo info, Codec codec) {
        return null;
    }

    private synchronized boolean createAlternateSecurityInterceptorFactory() {
        try {
            Class clazz = Thread.currentThread().getContextClassLoader().loadClass(interceptorFactory);
            if (AlternateSecurityInterceptorFactory.class.isAssignableFrom(clazz) &&
                    !clazz.isInterface()) {
                altSecFactory = (AlternateSecurityInterceptorFactory) clazz.newInstance();
                return true;
            } else {
                _logger.log(Level.INFO, "Not a valid factory class: " + interceptorFactory +
                        ". Must implement " + AlternateSecurityInterceptorFactory.class.getName());
            }
        } catch (ClassNotFoundException ex) {
            _logger.log(Level.INFO, "Interceptor Factory class " + interceptorFactory + " not loaded: ", ex);
        } catch (InstantiationException ex) {
            _logger.log(Level.INFO, "Interceptor Factory class " + interceptorFactory + " not loaded: ", ex);
        } catch (IllegalAccessException ex) {
            _logger.log(Level.INFO, "Interceptor Factory class " + interceptorFactory + " not loaded: ", ex);
        }
        return false;
    }

    private synchronized ClientRequestInterceptor getClientInterceptorInstance(Codec codec) {
        if (creq == null) {
            creq = new SecClientRequestInterceptor(
                "SecClientRequestInterceptor", codec);
        }
        return creq;
    }
    
}