/**
* Finds a value for a given annotation in the method parameter, converts it with the given
* builder.
*
* @param annotationType the annotation type.
* @param invocation the method invocation.
* @param returnValue the method's return value.
* @param objectType the object type
* @param builder the object builder.
* @return a converted value, possibly null of the parameter was null or the {@link
* ObjectBuilder#build(Object, Class)} returned null;
*/
protected <T, A extends Annotation> T findValueForType(
Class<A> annotationType,
MethodInvocation invocation,
Object returnValue,
Class<T> objectType,
ObjectBuilder builder) {
if (builder == null) {
return null;
}
Method method = invocation.getMethod();
int index = AopReflectionUtils.findParameterIndex(method, annotationType);
Object[] arguments = invocation.getArguments();
if (index != -1 && index < arguments.length) {
Object object = arguments[index];
return builder.build(object, objectType);
}
// Annotated on method, eg the return type
A annotation = method.getAnnotation(annotationType);
if (annotation != null) {
return builder.build(returnValue, objectType);
}
// Call the builder with NULL.
return builder.build(null, objectType);
}
/**
* Runs the {@link Statement} enhancement.
*
* @param invocation the invocation of the method call.
* @param returnValue the return value of the method call.
* @param statementAnnotation the {@link Statement} annotation.
*/
protected void processStatement(
MethodInvocation invocation, Object returnValue, Statement statementAnnotation) {
ObjectBuilder objectBuilder = getObjectBuilder(statementAnnotation);
StatementBuilder statementBuilder = getStatementBuilder(statementAnnotation);
Assert.notNull(
objectBuilder,
"An ObjectBuilder is required, please provide an instance of the ObjectBuilder as a bean.");
// Required
Actor actor =
findValueForType(
nl.edia.xapi.annotation.Actor.class,
invocation,
returnValue,
Actor.class,
objectBuilder);
// Required
Verb verb = objectBuilder.build(statementAnnotation.verb(), Verb.class);
// Required
IStatementObject object =
findValueForType(
nl.edia.xapi.annotation.StatementObject.class,
invocation,
returnValue,
IStatementObject.class,
objectBuilder);
if (actor != null && verb != null && object != null) {
Context context =
findValueForType(
nl.edia.xapi.annotation.Context.class,
invocation,
returnValue,
Context.class,
objectBuilder);
Result result =
findValueForType(
nl.edia.xapi.annotation.Result.class,
invocation,
returnValue,
Result.class,
objectBuilder);
gov.adlnet.xapi.model.Statement statement =
statementBuilder.build(actor, verb, object, result, context, null, null);
StatementClient statementClient = statementClientFactory.build(invocation, returnValue);
if (statementClient != null && statement != null) {
send(statementClient, statement);
}
}
}