/**
* This function gets all EMF objects in the specified collection from MongoDB. This function
* assumes that MongoDB is running on localhost.
*
* @param <T> The type of object to return.
* @param resourceSet The resource set to use when loading the objects.
* @param db The name of the MongoDB database containing the objects.
* @param collection The name of the MongoDB collection containing the objects.
* @return The EMF objects in the collection.
*/
@SuppressWarnings("unchecked")
public static <T extends EObject> Collection<T> getObjects(
ResourceSet resourceSet, String db, String collection) {
Resource resource =
resourceSet.getResource(
URI.createURI("mongodb://localhost/" + db + "/" + collection + "/?"), true);
assertThat(resource, is(notNullValue()));
ECollection eCollection = (ECollection) resource.getContents().get(0);
ArrayList<T> objects = new ArrayList<T>();
for (EObject object : eCollection.getValues()) objects.add((T) object);
return objects;
}
/**
* This function gets the specified EMF object from MongoDB. The object is located by querying all
* of the objects in the collection. If more than one object is found in the collection, the unit
* test will be failed. This function is useful when you don't have full visibility to a process
* that stores a single object to MongoDB. This function assumes that MongoDB is running on
* localhost.
*
* @param <T> The type of object to return.
* @param resourceSet The resource set to use when loading the object.
* @param db The name of the MongoDB database containing the object.
* @param collection The name of the MongoDB collection containing the object.
* @return The EMF object or null if it was not found.
*/
@SuppressWarnings("unchecked")
public static <T extends EObject> T getObject(
ResourceSet resourceSet, String db, String collection) {
Resource resource =
resourceSet.getResource(
URI.createURI("mongodb://localhost/" + db + "/" + collection + "/?"), true);
assertThat(resource, is(notNullValue()));
ECollection eCollection = (ECollection) resource.getContents().get(0);
if (eCollection.getValues().isEmpty()) return null;
assertThat(eCollection.getValues().size(), is(1));
return (T) eCollection.getValues().get(0);
}