Github user akashrn5 commented on a diff in the pull request:
https://github.com/apache/carbondata/pull/2310#discussion_r188869927
--- Diff: core/src/main/java/org/apache/carbondata/core/datamap/DataMapUtil.java ---
@@ -0,0 +1,132 @@
+/*
+ * 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.carbondata.core.datamap;
+
+import java.io.IOException;
+import java.lang.reflect.Constructor;
+import java.util.List;
+
+import org.apache.carbondata.common.logging.LogService;
+import org.apache.carbondata.common.logging.LogServiceFactory;
+import org.apache.carbondata.core.datamap.dev.expr.DataMapExprWrapper;
+import org.apache.carbondata.core.indexstore.ExtendedBlocklet;
+import org.apache.carbondata.core.indexstore.PartitionSpec;
+import org.apache.carbondata.core.indexstore.blockletindex.BlockletDataMapFactory;
+import org.apache.carbondata.core.metadata.schema.table.CarbonTable;
+import org.apache.carbondata.core.scan.filter.resolver.FilterResolverIntf;
+import org.apache.carbondata.core.statusmanager.SegmentStatusManager;
+import org.apache.carbondata.core.util.ObjectSerializationUtil;
+
+import org.apache.hadoop.conf.Configuration;
+
+public class DataMapUtil {
+
+ private static final String DATA_MAP_DSTR = "mapreduce.input.carboninputformat.datamapdstr";
+
+ private static final LogService LOGGER =
+ LogServiceFactory.getLogService(DataMapUtil.class.getName());
+
+ /**
+ * This method set DataMapJob if configured
+ *
+ * @param conf
+ * @throws IOException
+ */
+ public static void setDataMapJobIfConfigured(Configuration conf) throws IOException {
+ String className = "org.apache.carbondata.spark.rdd.SparkDataMapJob";
+ setDataMapJob(conf, createDataMapJob(className));
+ }
+
+ /**
+ * Creates instance for the DataMap Job class
+ *
+ * @param className
+ * @return
+ */
+ public static Object createDataMapJob(String className) {
+ try {
+ return Class.forName(className).getDeclaredConstructors()[0].newInstance();
+ } catch (Exception e) {
+ LOGGER.error(e);
+ return null;
+ }
+ }
+
+ public static void setDataMapJob(Configuration configuration, Object dataMapJob)
+ throws IOException {
+ if (dataMapJob != null) {
+ String toString = ObjectSerializationUtil.convertObjectToString(dataMapJob);
+ configuration.set(DATA_MAP_DSTR, toString);
+ }
+ }
+
+ public static DataMapJob getDataMapJob(Configuration configuration) throws IOException {
+ String jobString = configuration.get(DATA_MAP_DSTR);
+ if (jobString != null) {
+ return (DataMapJob) ObjectSerializationUtil.convertStringToObject(jobString);
+ }
+ return null;
+ }
+
+ public static void executeDataMapJobForClearingDataMaps(CarbonTable carbonTable)
+ throws IOException {
+ String dataMapJobClassName = "org.apache.carbondata.spark.rdd.SparkDataMapJob";
+ DataMapJob dataMapJob = (DataMapJob) createDataMapJob(dataMapJobClassName);
+ String className = "org.apache.carbondata.core.datamap.DistributableDataMapFormat";
+ SegmentStatusManager ssm = new SegmentStatusManager(carbonTable.getAbsoluteTableIdentifier());
+ List<Segment> validSegments = ssm.getValidAndInvalidSegments().getValidSegments();
+ DataMapExprWrapper dataMapExprWrapper = null;
+ if (DataMapStoreManager.getInstance().getAllDataMap(carbonTable).size() > 0) {
+ DataMapChooser dataMapChooser = new DataMapChooser(carbonTable);
+ dataMapExprWrapper = dataMapChooser.getAllDataMapsForClear(carbonTable);
+ } else {
+ return;
+ }
+ DistributableDataMapFormat dataMapFormat =
--- End diff --
no, if there are no datamaps present, it will return
---
Locked
