Modularize gandiva

- Add module-info.java and make it an open module
- Add dependency on org.immutables.value

java/gandiva/pom.xml

@@ -34,6 +34,10 @@
             <groupId>org.apache.arrow</groupId>
             <artifactId>arrow-memory-core</artifactId>
         </dependency>
+        <dependency>
+            <groupId>org.immutables</groupId>
+            <artifactId>value</artifactId>
+        </dependency>
         <dependency>
             <groupId>org.apache.arrow</groupId>
             <artifactId>arrow-memory-netty</artifactId>

java/gandiva/src/main/java/module-info.java

@@ -0,0 +1,29 @@
+/*
+ * 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.
+ */
+open module org.apache.arrow.gandiva {
+  exports org.apache.arrow.gandiva.expression;
+  exports org.apache.arrow.gandiva.exceptions;
+  exports org.apache.arrow.gandiva.evaluator;
+  exports org.apache.arrow.gandiva.ipc;
+
+  requires com.google.common;
+  requires org.apache.arrow.format;
+  requires org.apache.arrow.memory.core;
+  requires org.apache.arrow.vector;
+  requires org.slf4j;
+  requires protobuf.java;
+}