io.druid.data.input.impl.MapInputRowParser.java Source code

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Here is the source code for io.druid.data.input.impl.MapInputRowParser.java

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/*
 * Druid - a distributed column store.
 * Copyright 2012 - 2015 Metamarkets Group Inc.
 *
 * Licensed 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 io.druid.data.input.impl;

import com.fasterxml.jackson.annotation.JsonCreator;
import com.fasterxml.jackson.annotation.JsonProperty;
import com.google.common.collect.Lists;
import com.google.common.collect.Sets;

import io.druid.data.input.InputRow;
import io.druid.data.input.MapBasedInputRow;
import io.druid.java.util.common.parsers.ParseException;

import org.joda.time.DateTime;

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

public class MapInputRowParser implements InputRowParser<Map<String, Object>> {
    private final ParseSpec parseSpec;

    @JsonCreator
    public MapInputRowParser(@JsonProperty("parseSpec") ParseSpec parseSpec) {
        this.parseSpec = parseSpec;
    }

    @Override
    public InputRow parse(Map<String, Object> theMap) {
        final List<String> dimensions = parseSpec.getDimensionsSpec().hasCustomDimensions()
                ? parseSpec.getDimensionsSpec().getDimensionNames()
                : Lists.newArrayList(
                        Sets.difference(theMap.keySet(), parseSpec.getDimensionsSpec().getDimensionExclusions()));

        final DateTime timestamp;
        try {
            timestamp = parseSpec.getTimestampSpec().extractTimestamp(theMap);
            if (timestamp == null) {
                final String input = theMap.toString();
                throw new NullPointerException(String.format("Null timestamp in input: %s",
                        input.length() < 100 ? input : input.substring(0, 100) + "..."));
            }
        } catch (Exception e) {
            throw new ParseException(e, "Unparseable timestamp found!");
        }

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

    @JsonProperty
    @Override
    public ParseSpec getParseSpec() {
        return parseSpec;
    }

    @Override
    public InputRowParser withParseSpec(ParseSpec parseSpec) {
        return new MapInputRowParser(parseSpec);
    }
}