org.apache.druid.segment.SimpleQueryableIndex.java Source code

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Here is the source code for org.apache.druid.segment.SimpleQueryableIndex.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.druid.segment;

import com.google.common.annotations.VisibleForTesting;
import com.google.common.base.Preconditions;
import com.google.common.collect.ImmutableList;
import com.google.common.collect.Maps;
import org.apache.druid.collections.bitmap.BitmapFactory;
import org.apache.druid.java.util.common.io.smoosh.SmooshedFileMapper;
import org.apache.druid.segment.column.ColumnCapabilities;
import org.apache.druid.segment.column.ColumnHolder;
import org.apache.druid.segment.data.Indexed;
import org.joda.time.Interval;

import javax.annotation.Nullable;
import java.util.List;
import java.util.Map;

/**
 */
public class SimpleQueryableIndex extends AbstractIndex implements QueryableIndex {
    private final Interval dataInterval;
    private final List<String> columnNames;
    private final Indexed<String> availableDimensions;
    private final BitmapFactory bitmapFactory;
    private final Map<String, ColumnHolder> columns;
    private final SmooshedFileMapper fileMapper;
    @Nullable
    private final Metadata metadata;
    private final Map<String, DimensionHandler> dimensionHandlers;

    public SimpleQueryableIndex(Interval dataInterval, Indexed<String> dimNames, BitmapFactory bitmapFactory,
            Map<String, ColumnHolder> columns, SmooshedFileMapper fileMapper, @Nullable Metadata metadata) {
        Preconditions.checkNotNull(columns.get(ColumnHolder.TIME_COLUMN_NAME));
        this.dataInterval = Preconditions.checkNotNull(dataInterval, "dataInterval");
        ImmutableList.Builder<String> columnNamesBuilder = ImmutableList.builder();
        for (String column : columns.keySet()) {
            if (!ColumnHolder.TIME_COLUMN_NAME.equals(column)) {
                columnNamesBuilder.add(column);
            }
        }
        this.columnNames = columnNamesBuilder.build();
        this.availableDimensions = dimNames;
        this.bitmapFactory = bitmapFactory;
        this.columns = columns;
        this.fileMapper = fileMapper;
        this.metadata = metadata;
        this.dimensionHandlers = Maps.newLinkedHashMap();
        initDimensionHandlers();
    }

    @VisibleForTesting
    public SimpleQueryableIndex(Interval interval, List<String> columnNames, Indexed<String> availableDimensions,
            BitmapFactory bitmapFactory, Map<String, ColumnHolder> columns, SmooshedFileMapper fileMapper,
            @Nullable Metadata metadata, Map<String, DimensionHandler> dimensionHandlers) {
        this.dataInterval = interval;
        this.columnNames = columnNames;
        this.availableDimensions = availableDimensions;
        this.bitmapFactory = bitmapFactory;
        this.columns = columns;
        this.fileMapper = fileMapper;
        this.metadata = metadata;
        this.dimensionHandlers = dimensionHandlers;
    }

    @Override
    public Interval getDataInterval() {
        return dataInterval;
    }

    @Override
    public int getNumRows() {
        return columns.get(ColumnHolder.TIME_COLUMN_NAME).getLength();
    }

    @Override
    public List<String> getColumnNames() {
        return columnNames;
    }

    @Override
    public StorageAdapter toStorageAdapter() {
        return new QueryableIndexStorageAdapter(this);
    }

    @Override
    public Indexed<String> getAvailableDimensions() {
        return availableDimensions;
    }

    @Override
    public BitmapFactory getBitmapFactoryForDimensions() {
        return bitmapFactory;
    }

    @Nullable
    @Override
    public ColumnHolder getColumnHolder(String columnName) {
        return columns.get(columnName);
    }

    @VisibleForTesting
    public Map<String, ColumnHolder> getColumns() {
        return columns;
    }

    @VisibleForTesting
    public SmooshedFileMapper getFileMapper() {
        return fileMapper;
    }

    @Override
    public void close() {
        fileMapper.close();
    }

    @Override
    public Metadata getMetadata() {
        return metadata;
    }

    @Override
    public Map<String, DimensionHandler> getDimensionHandlers() {
        return dimensionHandlers;
    }

    private void initDimensionHandlers() {
        for (String dim : availableDimensions) {
            ColumnCapabilities capabilities = getColumnHolder(dim).getCapabilities();
            DimensionHandler handler = DimensionHandlerUtils.getHandlerFromCapabilities(dim, capabilities, null);
            dimensionHandlers.put(dim, handler);
        }
    }
}