com.metamx.druid.indexer.data.StringInputRowParser.java Source code

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Here is the source code for com.metamx.druid.indexer.data.StringInputRowParser.java

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/*
 * Druid - a distributed column store.
 * Copyright (C) 2012  Metamarkets Group Inc.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
 */

package com.metamx.druid.indexer.data;

import com.google.common.base.Function;
import com.google.common.collect.Lists;
import com.google.common.collect.Sets;
import com.metamx.common.exception.FormattedException;
import com.metamx.common.parsers.Parser;
import com.metamx.common.parsers.ToLowerCaseParser;
import com.metamx.druid.input.InputRow;
import com.metamx.druid.input.MapBasedInputRow;
import org.codehaus.jackson.annotate.JsonCreator;
import org.codehaus.jackson.annotate.JsonProperty;
import org.joda.time.DateTime;

import java.util.List;
import java.util.Map;
import java.util.Set;

/**
 */
public class StringInputRowParser {
    private final TimestampSpec timestampSpec;
    private final DataSpec dataSpec;

    private final Set<String> dimensionExclusions;
    private final Parser<String, Object> parser;

    @JsonCreator
    public StringInputRowParser(@JsonProperty("timestampSpec") TimestampSpec timestampSpec,
            @JsonProperty("data") DataSpec dataSpec,
            @JsonProperty("dimensionExclusions") List<String> dimensionExclusions) {
        this.timestampSpec = timestampSpec;
        this.dataSpec = dataSpec;

        this.dimensionExclusions = Sets.newHashSet();
        if (dimensionExclusions != null) {
            this.dimensionExclusions.addAll(Lists.transform(dimensionExclusions, new Function<String, String>() {
                @Override
                public String apply(String s) {
                    return s.toLowerCase();
                }
            }));
        }
        this.dimensionExclusions.add(timestampSpec.getTimestampColumn());

        this.parser = new ToLowerCaseParser(dataSpec.getParser());
    }

    public StringInputRowParser addDimensionExclusion(String dimension) {
        dimensionExclusions.add(dimension);
        return this;
    }

    public InputRow parse(String input) throws FormattedException {
        Map<String, Object> theMap = parser.parse(input);

        final List<String> dimensions = dataSpec.hasCustomDimensions() ? dataSpec.getDimensions()
                : Lists.newArrayList(Sets.difference(theMap.keySet(), dimensionExclusions));

        final DateTime timestamp = timestampSpec.extractTimestamp(theMap);
        if (timestamp == null) {
            throw new NullPointerException(String.format("Null timestamp in input string: %s",
                    input.length() < 100 ? input : input.substring(0, 100) + "..."));
        }

        return new MapBasedInputRow(timestamp.getMillis(), dimensions, theMap);
    }

    @JsonProperty
    public TimestampSpec getTimestampSpec() {
        return timestampSpec;
    }

    @JsonProperty("data")
    public DataSpec getDataSpec() {
        return dataSpec;
    }

    @JsonProperty
    public Set<String> getDimensionExclusions() {
        return dimensionExclusions;
    }
}