Github user kchilton2 commented on a diff in the pull request:
https://github.com/apache/incubator-rya/pull/127#discussion_r92820516
--- Diff:
common/rya.api/src/main/java/org/apache/rya/api/RdfCloudTripleStoreConfigurationBuilder.java
---
@@ -0,0 +1,158 @@
+/*
+ * 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.api;
+
+import com.google.common.base.Preconditions;
+
+/**
+ * This is a base class meant to be extended by Rya configuration
builders. Any
+ * class extending this class inherits setter methods that should be
common to
+ * all Rya implementations.
+ *
+ * @param <B>
+ * the configuration builder returned by each of the setter
methods
+ * @param <C>
+ * the configuration object returned by the builder when build
is
+ * called
+ */
+public abstract class RdfCloudTripleStoreConfigurationBuilder<B extends
RdfCloudTripleStoreConfigurationBuilder<B, C>, C extends
RdfCloudTripleStoreConfiguration> {
+
+ private String prefix = "rya_";
+ private String auths;
+ private String visibilities;
+ private boolean useInference = false;
+ private boolean displayPlan = false;
+
+ /**
+ * Auxiliary method to return specified Builder in a type safe way
+ *
+ * @return specified builder
+ */
+ protected abstract B confBuilder();
+
+ /**
+ * Auxiliary method to return type of configuration object constructed
by
+ * builder in a type safe way
+ *
+ * @return specified configuration
+ */
+ protected abstract C createConf();
+
+ /**
+ * Set whether to use backwards chaining inferencing during query
+ * evaluation. The default value is false.
+ *
+ * @param useInference
+ * - turn inferencing on and off in Rya
+ * @return B - concrete builder class
+ */
+ public B useInference(boolean useInference) {
+ this.useInference = useInference;
+ return confBuilder();
+ }
+
+ /**
+ *
+ * Sets the authorization for querying the underlying data store.
+ *
+ * @param auths
+ * - authorizations for querying underlying datastore
+ * @return B - concrete builder class
+ */
+ public B auths(String auths) {
+ Preconditions.checkNotNull(auths, "User auths cannot be null.");
--- End diff --
These kind of checks should happen when you build the concrete object
rather than when you're setting values in the builder.
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