[GitHub] mcvsubbu commented on a change in pull request #3543: Segment merge lineage data structure

[GitBox <gi...@apache.org>]

mcvsubbu commented on a change in pull request #3543: Segment merge lineage data structure
URL: https://github.com/apache/incubator-pinot/pull/3543#discussion_r236420996
 
 

 ##########
 File path: pinot-common/src/main/java/com/linkedin/pinot/common/lineage/SegmentMergeLineage.java
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 @@ -0,0 +1,313 @@
+/**
+ * Copyright (C) 2014-2018 LinkedIn Corp. (pinot-core@linkedin.com)
+ *
+ * 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 com.linkedin.pinot.common.lineage;
+
+import com.linkedin.pinot.common.exception.InvalidConfigException;
+import com.linkedin.pinot.common.utils.EqualityUtils;
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.Collections;
+import java.util.HashMap;
+import java.util.HashSet;
+import java.util.List;
+import java.util.Map;
+import org.apache.helix.ZNRecord;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+
+/**
+ * Class to represent segment merge lineage information
+ */
+public class SegmentMergeLineage {
+
+  private static final Logger LOGGER = LoggerFactory.getLogger(SegmentMergeLineage.class);
+
+  private static final String LEVEL_KEY_PREFIX = "level_";
+  private static final String ROOT_NODE_GROUP_ID = "root";
+  private static final String SEGMENT_DELIMITER = ",";
+  private static final int DEFAULT_GROUP_LEVEL = 0;
+
+  private String _tableNameWithType;
+  private Map<String, List<String>> _parentGroupToChildrenGroupsMap;
+  private Map<Integer, Map<String, List<String>>> _levelToGroupToSegmentsMap;
+
+  public SegmentMergeLineage(String tableNameWithType) {
+    _tableNameWithType = tableNameWithType;
+    _parentGroupToChildrenGroupsMap = new HashMap<>();
+    _levelToGroupToSegmentsMap = new HashMap<>();
+  }
+
+  public SegmentMergeLineage(String tableNameWithType, Map<String, List<String>> segmentGroupLineageMap,
+      Map<Integer, Map<String, List<String>>> levelToGroupToSegmentMap, int version) {
 
 Review comment:
   version not used?

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