private <T extends Mergeable> Object mergeProperties(
Merge mergeAnnotation, String propertyName, T target, T source) throws MergerException {
try {
String tag = null;
if (mergeAnnotation != null) {
tag = mergeAnnotation.value();
}
Object targetProperty = PropertyUtils.getProperty(target, propertyName);
Object sourceProperty = PropertyUtils.getProperty(source, propertyName);
Class propertyType = PropertyUtils.getPropertyType(target, propertyName);
Object merged;
if (tag != null && target.isGenerated() && target.containsTag(tag)) {
merged = sourceProperty;
} else {
merged = merge(propertyType, targetProperty, sourceProperty);
}
updateTag(target, tag, merged == null);
return merged;
} catch (NoSuchMethodException e) {
throw new MergerException("NoSuchMethodException while trying to merge", e);
} catch (IllegalAccessException e) {
throw new MergerException("IllegalAccessException while trying to merge", e);
} catch (InvocationTargetException e) {
throw new MergerException("InvocationTargetException while trying to merge", e);
}
}
