private List<FieldNode> getAnnotatedFieldOfClass(ClassNode target, ClassNode annotation) {
List<FieldNode> result = new ArrayList<FieldNode>();
for (FieldNode fieldNode : target.getFields())
if (!fieldNode.getAnnotations(annotation).isEmpty()) result.add(fieldNode);
return result;
}
private List<FieldNode> getAnnotatedFieldsOfHierarchy(ClassNode target, ClassNode annotation) {
List<FieldNode> result = new ArrayList<FieldNode>();
for (ClassNode level : ASTHelper.getHierarchyOfDSLObjectAncestors(target)) {
result.addAll(getAnnotatedFieldOfClass(level, annotation));
}
return result;
}
private FieldNode getOwnerField(ClassNode target) {
List<FieldNode> annotatedFields = getAnnotatedFieldsOfHierarchy(target, OWNER_ANNOTATION);
if (annotatedFields.isEmpty()) return null;
if (annotatedFields.size() > 1) {
addCompileError(
String.format(
"Found more than owner key fields, only one is allowed in hierarchy (%s, %s)",
getQualifiedName(annotatedFields.get(0)), getQualifiedName(annotatedFields.get(1))),
annotatedFields.get(0));
return null;
}
return annotatedFields.get(0);
}
private FieldNode getKeyField(ClassNode target) {
List<FieldNode> annotatedFields = getAnnotatedFieldsOfHierarchy(target, KEY_ANNOTATION);
if (annotatedFields.isEmpty()) return null;
if (annotatedFields.size() > 1) {
addCompileError(
String.format(
"Found more than one key fields, only one is allowed in hierarchy (%s, %s)",
getQualifiedName(annotatedFields.get(0)), getQualifiedName(annotatedFields.get(1))),
annotatedFields.get(0));
return null;
}
FieldNode result = annotatedFields.get(0);
if (!result.getType().equals(ClassHelper.STRING_TYPE)) {
addCompileError(
String.format(
"Key field '%s' must be of type String, but is '%s' instead",
result.getName(), result.getType().getName()),
result);
return null;
}
ClassNode ancestor = ASTHelper.getHighestAncestorDSLObject(target);
if (target.equals(ancestor)) return result;
FieldNode firstKey = getKeyField(ancestor);
if (firstKey == null) {
addCompileError(
String.format(
"Inconsistent hierarchy: Toplevel class %s has no key, but child class %s defines '%s'.",
ancestor.getName(), target.getName(), result.getName()),
result);
return null;
}
return result;
}