Add regex_program java APIs and unit tests

java/src/main/java/ai/rapids/cudf/CaptureGroups.java

@@ -0,0 +1,35 @@
+/*
+ *
+ *  Copyright (c) 2023, NVIDIA CORPORATION.
+ *
+ *  Licensed 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 ai.rapids.cudf;
+
+/**
+ * Capture groups setting, closely following cudf::strings::capture_groups.
+ * For processing a regex pattern containing capture groups. These can be used
+ * to optimize the generated regex instructions where the capture groups do not
+ * require extracting the groups.
+ */
+public enum CaptureGroups {
+  EXTRACT(0),     // capture groups processed normally for extract
+  NON_CAPTURE(1); // convert all capture groups to non-capture groups
+
+  final int nativeId; // Native id, for use with libcudf.
+  CaptureGroups(int nativeId) {
+    this.nativeId = nativeId;
+  }
+}