Github user sounakr commented on a diff in the pull request: https://github.com/apache/carbondata/pull/1359#discussion_r143714764 --- Diff: examples/spark2/src/main/scala/org/apache/carbondata/examples/MinMaxDataMap.java --- @@ -0,0 +1,160 @@ +/* + * 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.examples; + +import java.io.BufferedReader; +import java.io.DataInputStream; +import java.io.IOException; +import java.io.InputStreamReader; +import java.util.ArrayList; +import java.util.BitSet; +import java.util.List; + +import org.apache.carbondata.common.logging.LogService; +import org.apache.carbondata.common.logging.LogServiceFactory; +import org.apache.carbondata.core.cache.Cacheable; +import org.apache.carbondata.core.constants.CarbonCommonConstants; +import org.apache.carbondata.core.datamap.dev.DataMap; +import org.apache.carbondata.core.datastore.IndexKey; +import org.apache.carbondata.core.datastore.block.SegmentProperties; +import org.apache.carbondata.core.datastore.filesystem.CarbonFile; +import org.apache.carbondata.core.datastore.filesystem.CarbonFileFilter; +import org.apache.carbondata.core.datastore.impl.FileFactory; +import org.apache.carbondata.core.fileoperations.AtomicFileOperations; +import org.apache.carbondata.core.fileoperations.AtomicFileOperationsImpl; +import org.apache.carbondata.core.indexstore.Blocklet; +import org.apache.carbondata.core.memory.MemoryException; +import org.apache.carbondata.core.scan.filter.FilterUtil; +import org.apache.carbondata.core.scan.filter.executer.FilterExecuter; +import org.apache.carbondata.core.scan.filter.resolver.FilterResolverIntf; +import org.apache.carbondata.core.util.CarbonUtil; + +import com.google.gson.Gson; + +/** + * Datamap implementation for min max blocklet. + */ +public class MinMaxDataMap implements DataMap, Cacheable { + + private static final LogService LOGGER = + LogServiceFactory.getLogService(MinMaxDataMap.class.getName()); + + public static final String NAME = "clustered.minmax.btree.blocklet"; + + private String filePath; + + private MinMaxIndexBlockDetails[] readMinMaxDataMap; + + @Override public void init(String filePath) throws MemoryException, IOException { + this.filePath = filePath; + CarbonFile[] listFiles = getCarbonIndexFiles(filePath, "0"); + for (int i = 0; i < listFiles.length; i++) { + readMinMaxDataMap = readJson(listFiles[i].getPath()); + } + } + + private CarbonFile[] getCarbonIndexFiles(String filePath, String segmentId) { --- End diff -- Done.
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