// we set an observer to detect VirtualMachineImpl.dispose call
// and on dispose we add corresponding VirtualMachineImpl.class to
// free VirtualMachimeImpl Class list.
protected static void setVMDisposeObserver(final Object vm) {
try {
Method setDisposeObserverMethod =
vm.getClass()
.getDeclaredMethod("setDisposeObserver", new Class[] {java.util.Observer.class});
setDisposeObserverMethod.setAccessible(true);
setDisposeObserverMethod.invoke(
vm,
new Object[] {
new Observer() {
public void update(Observable o, Object data) {
if (DEBUG) {
System.out.println("got VM.dispose notification");
}
addFreeVMImplClass(vm.getClass());
}
}
});
} catch (Exception exp) {
if (DEBUG) {
System.out.println("setVMDisposeObserver() got an exception:");
exp.printStackTrace();
}
}
}
/* gets target VM version from the given VMVersionMismatchException.
* Note that we need to reflectively call the method because of we may
* have got this from different classloader's namespace */
private static String getVMVersion(Throwable throwable)
throws NoSuchMethodException, InvocationTargetException, IllegalAccessException {
// assert isVMVersionMismatch(throwable), "not a VMVersionMismatch"
Class expClass = throwable.getClass();
Method targetVersionMethod = expClass.getMethod("getTargetVersion", new Class[0]);
return (String) targetVersionMethod.invoke(throwable);
}
private void generateView(
Map<String, DesignDocument.View> views, Method me, Class<?> handledType) {
String name = me.getName();
if (!name.startsWith("findBy") && !name.equals("getAll")) {
throw new ViewGenerationException(
String.format(
"The method: %s in %s annotated with GenerateView does not conform to the naming convention of 'findByXxxx'",
name, me.getDeclaringClass()));
}
Class<?> type = resolveReturnType(me);
if (type == null) {
if (handledType != null) {
type = handledType;
} else {
throw new ViewGenerationException(
"Could not resolve return type for method: %s in %s",
me.getName(), me.getDeclaringClass());
}
}
String typeDiscriminator = resolveTypeDiscriminator(type);
if (name.equals("getAll")) {
if (typeDiscriminator.length() < 1) {
throw new ViewGenerationException(
String.format(
"Cannot generate 'all' view for %s. No type discriminator could be resolved. Try annotate unique field(s) with @TypeDiscriminator",
type.getDeclaringClass()));
}
views.put("all", generateAllView(typeDiscriminator));
return;
}
String finderName = name.substring(6);
String fieldName = resolveFieldName(me, finderName);
Method getter = findMethod(type, "get" + fieldName);
if (getter == null) {
// try pluralis
fieldName += "s";
getter = findMethod(type, "get" + fieldName);
}
if (getter == null) {
throw new ViewGenerationException(
"Could not generate view for method %s. No get method found for property %s in %s",
name, name.substring(6), type);
}
fieldName = firstCharToLowerCase(fieldName);
DesignDocument.View view;
if (isIterable(getter.getReturnType())) {
view = generateFindByIterableView(fieldName, typeDiscriminator);
} else {
view = generateFindByView(fieldName, typeDiscriminator);
}
views.put("by_" + firstCharToLowerCase(finderName), view);
}
private Class<?> resolveReturnType(Method me) {
Type returnType = me.getGenericReturnType();
if (returnType instanceof ParameterizedType) {
ParameterizedType type = (ParameterizedType) returnType;
Type[] typeArguments = type.getActualTypeArguments();
for (Type typeArgument : typeArguments) {
if (typeArgument instanceof Class<?>) {
return (Class<?>) typeArgument;
}
}
return null;
}
return (Class<?>) returnType;
}
protected void generateView(
Map<String, org.ektorp.support.DesignDocument.View> views, Method me) {
DocumentReferences referenceMetaData = me.getAnnotation(DocumentReferences.class);
if (referenceMetaData == null) {
LOG.warn("No DocumentReferences annotation found in method: ", me.getName());
return;
}
if (!me.getName().startsWith("get")) {
throw new ViewGenerationException(
String.format(
"The method: %s in %s annotated with DocumentReferences does not conform to the naming convention of 'getXxxx'",
me.getName(), me.getDeclaringClass()));
}
if (Set.class.isAssignableFrom(me.getReturnType())) {
generateSetBasedDocRefView(views, me, referenceMetaData);
} else {
throw new ViewGenerationException(
String.format(
"The return type of: %s in %s annotated with DocumentReferences is not supported. (Must be assignable from java.util.Set)",
me.getName(), me.getDeclaringClass()));
}
}
private String resolveFieldName(Method me, String finderName) {
GenerateView g = me.getAnnotation(GenerateView.class);
String field = g.field();
return field.length() == 0 ? finderName : g.field();
}