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package com.sun.ejb.containers.interceptors;
import jakarta.interceptor.AroundConstruct;
import jakarta.interceptor.AroundInvoke;
import jakarta.annotation.PostConstruct;
import jakarta.annotation.PreDestroy;
import jakarta.interceptor.AroundTimeout;
import jakarta.interceptor.InvocationContext;
import com.sun.enterprise.deployment.InterceptorDescriptor;
import com.sun.enterprise.deployment.LifecycleCallbackDescriptor;
import static com.sun.enterprise.deployment.LifecycleCallbackDescriptor.CallbackType;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.util.List;
import java.io.Serializable;
/**
*
* @author Kenneth Saks
*/
public class SystemInterceptorProxy
{
// Won't actually be Serialized since it only applies to Stateless/Singleton
public Object delegate;
private Method aroundConstruct;
private Method postConstruct;
private Method preDestroy;
private Method aroundInvoke;
private Method aroundTimeout;
public void setDelegate(Object d) {
Class delegateClass = d.getClass();
try {
for(Method m : delegateClass.getDeclaredMethods() ) {
if( m.getAnnotation(PostConstruct.class) != null ) {
postConstruct = m;
prepareMethod(m);
} else if( m.getAnnotation(PreDestroy.class) != null ) {
preDestroy = m;
prepareMethod(m);
} else if( m.getAnnotation(AroundInvoke.class) != null ) {
aroundInvoke = m;
prepareMethod(m);
} else if( m.getAnnotation(AroundTimeout.class) != null ) {
aroundTimeout = m;
prepareMethod(m);
} else if( m.getAnnotation(AroundConstruct.class) != null ) {
aroundConstruct = m;
prepareMethod(m);
}
}
} catch(Exception e) {
throw new IllegalArgumentException(e);
}
delegate = d;
}
private void prepareMethod(final Method m) throws Exception {
java.security.AccessController
.doPrivileged(new java.security.PrivilegedExceptionAction() {
public java.lang.Object run() throws Exception {
if (!m.isAccessible()) {
m.setAccessible(true);
}
return null;
}});
}
@PostConstruct
public Object init(InvocationContext ctx) throws Exception {
return doCall(ctx, postConstruct);
}
@PreDestroy
public Object destroy(InvocationContext ctx) throws Exception {
return doCall(ctx, preDestroy);
}
@AroundConstruct
public Object create(InvocationContext ctx) throws Exception {
return doCall(ctx, aroundConstruct);
}
@AroundInvoke
public Object aroundInvoke(InvocationContext ctx) throws Exception {
return doCall(ctx, aroundInvoke);
}
@AroundTimeout
public Object aroundTimeout(InvocationContext ctx) throws Exception {
return doCall(ctx, aroundTimeout);
}
private Object doCall(InvocationContext ctx, Method m) throws Exception {
Object returnValue = null;
if( (delegate != null) && (m != null) ) {
try {
returnValue = m.invoke(delegate, ctx);
} catch(InvocationTargetException ite) {
Throwable cause = ite.getCause();
if (cause instanceof Exception) {
throw (Exception) cause;
}
throw new Exception(cause);
}
} else {
returnValue = ctx.proceed();
}
return returnValue;
}
public static InterceptorDescriptor createInterceptorDesc() {
InterceptorDescriptor interceptor = new InterceptorDescriptor();
Class interceptorClass = SystemInterceptorProxy.class;
String interceptorName = interceptorClass.getName();
interceptor.setInterceptorClass(interceptorClass);
{
LifecycleCallbackDescriptor desc = new LifecycleCallbackDescriptor();
desc.setLifecycleCallbackClass(interceptorName);
desc.setLifecycleCallbackMethod("create");
interceptor.addCallbackDescriptor(CallbackType.AROUND_CONSTRUCT, desc);
}
{
LifecycleCallbackDescriptor desc = new LifecycleCallbackDescriptor();
desc.setLifecycleCallbackClass(interceptorName);
desc.setLifecycleCallbackMethod("init");
interceptor.addCallbackDescriptor(CallbackType.POST_CONSTRUCT, desc);
}
{
LifecycleCallbackDescriptor desc = new LifecycleCallbackDescriptor();
desc.setLifecycleCallbackClass(interceptorName);
desc.setLifecycleCallbackMethod("destroy");
interceptor.addCallbackDescriptor(CallbackType.PRE_DESTROY, desc);
}
{
LifecycleCallbackDescriptor desc = new LifecycleCallbackDescriptor();
desc.setLifecycleCallbackClass(interceptorName);
desc.setLifecycleCallbackMethod("aroundInvoke");
interceptor.addAroundInvokeDescriptor(desc);
}
{
LifecycleCallbackDescriptor desc = new LifecycleCallbackDescriptor();
desc.setLifecycleCallbackClass(interceptorName);
desc.setLifecycleCallbackMethod("aroundTimeout");
interceptor.addAroundTimeoutDescriptor(desc);
}
return interceptor;
}
}