org.apache.carbondata.core.datamap.DataMapMeta.java Source code

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Here is the source code for org.apache.carbondata.core.datamap.DataMapMeta.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.core.datamap;

import java.util.List;

import org.apache.carbondata.common.annotations.InterfaceAudience;
import org.apache.carbondata.common.annotations.InterfaceStability;
import org.apache.carbondata.core.metadata.schema.table.column.CarbonColumn;
import org.apache.carbondata.core.scan.filter.intf.ExpressionType;

import org.apache.commons.collections.CollectionUtils;
import org.apache.commons.collections.Transformer;
import org.apache.commons.lang3.StringUtils;

/**
 * Metadata of the datamap, set by DataMap developer
 */
@InterfaceAudience.Developer("DataMap")
@InterfaceStability.Evolving
public class DataMapMeta {
    private String dataMapName;

    private List<CarbonColumn> indexedColumns;

    private List<ExpressionType> optimizedOperation;

    public DataMapMeta(List<CarbonColumn> indexedColumns, List<ExpressionType> optimizedOperation) {
        this.indexedColumns = indexedColumns;
        this.optimizedOperation = optimizedOperation;
    }

    public DataMapMeta(String dataMapName, List<CarbonColumn> indexedColumns,
            List<ExpressionType> optimizedOperation) {
        this(indexedColumns, optimizedOperation);
        this.dataMapName = dataMapName;
    }

    public String getDataMapName() {
        return dataMapName;
    }

    public List<CarbonColumn> getIndexedColumns() {
        return indexedColumns;
    }

    public List<String> getIndexedColumnNames() {
        return (List<String>) CollectionUtils.collect(indexedColumns, new Transformer() {
            @Override
            public Object transform(Object input) {
                return ((CarbonColumn) input).getColName();
            }
        });
    }

    public List<ExpressionType> getOptimizedOperation() {
        return optimizedOperation;
    }

    @Override
    public String toString() {
        return new StringBuilder("DataMapMeta{").append("dataMapName='").append(dataMapName).append('\'')
                .append(", indexedColumns=[").append(StringUtils.join(getIndexedColumnNames(), ", ")).append("]\'")
                .append(", optimizedOperation=").append(optimizedOperation).append('}').toString();
    }
}