com.sun.xml.ws.transport.httpspi.servlet.InvokerImpl Maven / Gradle / Ivy
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package com.sun.xml.ws.transport.httpspi.servlet;
import javax.xml.ws.spi.Invoker;
import javax.xml.ws.WebServiceContext;
import javax.xml.ws.WebServiceException;
import javax.annotation.PostConstruct;
import javax.annotation.PreDestroy;
import com.sun.xml.ws.util.InjectionPlan;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.lang.annotation.Annotation;
import java.security.AccessController;
import java.security.PrivilegedAction;
/**
* @author Jitendra Kotamraju
*/
class InvokerImpl extends Invoker {
private final Class implType;
private final Object impl;
private final Method postConstructMethod;
// private final Method preDestroyMethod;
InvokerImpl(Class implType) {
this.implType = implType;
postConstructMethod = findAnnotatedMethod(implType, PostConstruct.class);
// preDestroyMethod = findAnnotatedMethod(implType, PreDestroy.class);
try {
impl = implType.newInstance();
} catch (InstantiationException e) {
throw new WebServiceException(e);
} catch (IllegalAccessException e) {
throw new WebServiceException(e);
}
}
/*
* Helper for invoking a method with elevated privilege.
*/
private static void invokeMethod(final Method method, final Object instance, final Object... args) {
if(method==null) return;
AccessController.doPrivileged(new PrivilegedAction() {
public Void run() {
try {
if (!method.isAccessible()) {
method.setAccessible(true);
}
method.invoke(instance,args);
} catch (IllegalAccessException e) {
throw new WebServiceException(e);
} catch (InvocationTargetException e) {
throw new WebServiceException(e);
}
return null;
}
});
}
public void inject(WebServiceContext webServiceContext) throws IllegalAccessException, IllegalArgumentException, InvocationTargetException {
InjectionPlan.buildInjectionPlan(
implType, WebServiceContext.class,false).inject(impl,webServiceContext);
invokeMethod(postConstructMethod, impl);
}
public Object invoke(Method m, Object... args) throws IllegalAccessException, IllegalArgumentException, InvocationTargetException {
return m.invoke(impl, args);
}
/*
* Finds the method that has the given annotation, while making sure that
* there's only at most one such method.
*/
private static Method findAnnotatedMethod(Class clazz, Class annType) {
boolean once = false;
Method r = null;
for(Method method : clazz.getDeclaredMethods()) {
if (method.getAnnotation(annType) != null) {
if (once)
throw new WebServiceException("Only one method should have the annotation"+annType);
if (method.getParameterTypes().length != 0)
throw new WebServiceException("Method"+method+"shouldn't have any arguments");
r = method;
once = true;
}
}
return r;
}
}