Github user isper3at commented on a diff in the pull request:
https://github.com/apache/incubator-rya/pull/124#discussion_r94812004
--- Diff:
dao/mongodb.rya/src/main/java/org/apache/rya/mongodb/document/operators/aggregation/PipelineOperators.java
---
@@ -0,0 +1,92 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements. See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership. The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied. See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+package org.apache.rya.mongodb.document.operators.aggregation;
+
+import static
org.apache.rya.mongodb.document.operators.query.ConditionalOperators.cond;
+
+import com.mongodb.BasicDBObject;
+import com.mongodb.BasicDBObjectBuilder;
+
+/**
+ * Utility methods for pipeline operators.
+ */
+public final class PipelineOperators {
--- End diff --
For all the *Operators, I think it would be helpful to make the functions
return the actual BasicDBObjectBuilder. That way you can supply each function
with a builder and it appends the operation to it, making it a lot easier to
spin up more complicated queries.
If you have time to do this, awesome, if not we can open a ticket
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