org.apache.carbondata.spark.util.Util.java Source code

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Here is the source code for org.apache.carbondata.spark.util.Util.java

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/*
 * 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.spark.util;

import java.util.ArrayList;
import java.util.List;

import org.apache.carbondata.core.metadata.datatype.DataType;
import org.apache.carbondata.core.metadata.schema.table.CarbonTable;
import org.apache.carbondata.core.metadata.schema.table.column.CarbonColumn;
import org.apache.carbondata.core.metadata.schema.table.column.ColumnSchema;
import org.apache.carbondata.hadoop.CarbonInputSplit;

import org.apache.spark.SparkConf;
import org.apache.spark.sql.types.DataTypes;
import org.apache.spark.sql.types.DecimalType;
import org.apache.spark.sql.types.Metadata;
import org.apache.spark.sql.types.StructField;
import org.apache.spark.sql.types.StructType;
import org.apache.spark.sql.util.CarbonMetastoreTypes;
import org.apache.spark.sql.util.SparkTypeConverter;
import org.apache.spark.util.Utils;

public class Util {
    /**
     * return the Array of available local-dirs
     */
    public static String[] getConfiguredLocalDirs(SparkConf conf) {
        return Utils.getConfiguredLocalDirs(conf);
    }

    /**
     * Method to check whether there exists any block which does not contain the blocklet info
     *
     * @param splitList
     * @return
     */
    public static boolean isBlockWithoutBlockletInfoExists(List<CarbonInputSplit> splitList) {
        for (CarbonInputSplit inputSplit : splitList) {
            if (null == inputSplit.getDetailInfo().getBlockletInfo()) {
                return true;
            }
        }
        return false;
    }

    public static org.apache.spark.sql.types.DataType convertCarbonToSparkDataType(DataType carbonDataType) {
        if (carbonDataType == org.apache.carbondata.core.metadata.datatype.DataTypes.STRING) {
            return DataTypes.StringType;
        } else if (carbonDataType == org.apache.carbondata.core.metadata.datatype.DataTypes.SHORT) {
            return DataTypes.ShortType;
        } else if (carbonDataType == org.apache.carbondata.core.metadata.datatype.DataTypes.INT) {
            return DataTypes.IntegerType;
        } else if (carbonDataType == org.apache.carbondata.core.metadata.datatype.DataTypes.LONG) {
            return DataTypes.LongType;
        } else if (carbonDataType == org.apache.carbondata.core.metadata.datatype.DataTypes.DOUBLE) {
            return DataTypes.DoubleType;
        } else if (carbonDataType == org.apache.carbondata.core.metadata.datatype.DataTypes.BOOLEAN) {
            return DataTypes.BooleanType;
        } else if (org.apache.carbondata.core.metadata.datatype.DataTypes.isDecimal(carbonDataType)) {
            return DataTypes.createDecimalType();
        } else if (carbonDataType == org.apache.carbondata.core.metadata.datatype.DataTypes.TIMESTAMP) {
            return DataTypes.TimestampType;
        } else if (carbonDataType == org.apache.carbondata.core.metadata.datatype.DataTypes.DATE) {
            return DataTypes.DateType;
        } else {
            return null;
        }
    }

    public static StructType convertToSparkSchema(CarbonTable table) {
        List<CarbonColumn> columns = table.getCreateOrderColumn(table.getTableName());
        ColumnSchema[] schema = new ColumnSchema[columns.size()];
        int i = 0;
        for (CarbonColumn column : columns) {
            schema[i++] = column.getColumnSchema();
        }
        return convertToSparkSchema(table, schema);
    }

    public static StructType convertToSparkSchema(CarbonTable table, ColumnSchema[] carbonColumns) {
        List<StructField> fields = new ArrayList<>(carbonColumns.length);
        for (int i = 0; i < carbonColumns.length; i++) {
            ColumnSchema carbonColumn = carbonColumns[i];
            DataType dataType = carbonColumn.getDataType();
            if (org.apache.carbondata.core.metadata.datatype.DataTypes.isDecimal(dataType)) {
                fields.add(new StructField(carbonColumn.getColumnName(),
                        new DecimalType(carbonColumn.getPrecision(), carbonColumn.getScale()), true,
                        Metadata.empty()));
            } else if (org.apache.carbondata.core.metadata.datatype.DataTypes.isStructType(dataType)) {
                fields.add(new StructField(carbonColumn.getColumnName(),
                        CarbonMetastoreTypes.toDataType(String.format("struct<%s>",
                                SparkTypeConverter.getStructChildren(table, carbonColumn.getColumnName()))),
                        true, Metadata.empty()));
            } else if (org.apache.carbondata.core.metadata.datatype.DataTypes.isArrayType(dataType)) {
                fields.add(new StructField(carbonColumn.getColumnName(),
                        CarbonMetastoreTypes.toDataType(String.format("array<%s>",
                                SparkTypeConverter.getArrayChildren(table, carbonColumn.getColumnName()))),
                        true, Metadata.empty()));
            } else {
                fields.add(new StructField(carbonColumn.getColumnName(),
                        convertCarbonToSparkDataType(carbonColumn.getDataType()), true, Metadata.empty()));
            }
        }
        return new StructType(fields.toArray(new StructField[0]));
    }
}