org.apache.druid.data.input.impl.MapInputRowParser.java Source code

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Here is the source code for org.apache.druid.data.input.impl.MapInputRowParser.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.data.input.impl;

import com.fasterxml.jackson.annotation.JsonCreator;
import com.fasterxml.jackson.annotation.JsonProperty;
import com.google.common.collect.ImmutableList;
import com.google.common.collect.Lists;
import com.google.common.collect.Sets;
import org.apache.druid.data.input.InputRow;
import org.apache.druid.data.input.MapBasedInputRow;
import org.apache.druid.java.util.common.StringUtils;
import org.apache.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 List<InputRow> parseBatch(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(StringUtils.format("Null timestamp in input: %s",
                        input.length() < 100 ? input : input.substring(0, 100) + "..."));
            }
        } catch (Exception e) {
            throw new ParseException(e, "Unparseable timestamp found! Event: %s", theMap);
        }

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

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

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