io.druid.data.input.MapBasedRow.java Source code

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

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/*
 * Druid - a distributed column store.
 * Copyright (C) 2012, 2013  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 io.druid.data.input;

import com.fasterxml.jackson.annotation.JsonCreator;
import com.fasterxml.jackson.annotation.JsonProperty;
import com.google.common.base.Function;
import com.google.common.collect.ImmutableMap;
import com.google.common.collect.Lists;
import com.metamx.common.IAE;
import com.metamx.common.exception.FormattedException;
import org.joda.time.DateTime;

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

/**
 */
public class MapBasedRow implements Row {
    private final DateTime timestamp;
    private final Map<String, Object> event;

    @JsonCreator
    public MapBasedRow(@JsonProperty("timestamp") DateTime timestamp,
            @JsonProperty("event") Map<String, Object> event) {
        this.timestamp = timestamp;
        this.event = event;
    }

    public MapBasedRow(long timestamp, Map<String, Object> event) {
        this(new DateTime(timestamp), event);
    }

    @Override
    public long getTimestampFromEpoch() {
        return timestamp.getMillis();
    }

    @Override
    public List<String> getDimension(String dimension) {
        Object dimValue = event.get(dimension);

        if (dimValue == null) {
            return Lists.newArrayList();
        } else if (dimValue instanceof List) {
            return Lists.transform((List) dimValue, new Function<Object, String>() {
                @Override
                public String apply(@Nullable Object input) {
                    return String.valueOf(input);
                }
            });
        } else if (dimValue instanceof Object) {
            return Arrays.asList(String.valueOf(event.get(dimension)));
        } else {
            throw new IAE("Unknown dim type[%s]", dimValue.getClass());
        }
    }

    @Override
    public float getFloatMetric(String metric) {
        Object metricValue = event.get(metric);

        if (metricValue == null) {
            return 0.0f;
        }

        if (metricValue instanceof Number) {
            return ((Number) metricValue).floatValue();
        } else if (metricValue instanceof String) {
            try {
                return Float.valueOf(((String) metricValue).replace(",", ""));
            } catch (Exception e) {
                throw new FormattedException.Builder().withErrorCode(FormattedException.ErrorCode.UNPARSABLE_METRIC)
                        .withDetails(
                                ImmutableMap.<String, Object>of("metricName", metric, "metricValue", metricValue))
                        .withMessage(e.getMessage()).build();
            }
        } else {
            throw new IAE("Unknown type[%s]", metricValue.getClass());
        }
    }

    @JsonProperty
    public DateTime getTimestamp() {
        return timestamp;
    }

    @JsonProperty
    public Map<String, Object> getEvent() {
        return event;
    }

    @Override
    public String toString() {
        return "MapBasedRow{" + "timestamp=" + timestamp + ", event=" + event + '}';
    }

    @Override
    public boolean equals(Object o) {
        if (this == o) {
            return true;
        }
        if (o == null || getClass() != o.getClass()) {
            return false;
        }

        MapBasedRow that = (MapBasedRow) o;

        if (!event.equals(that.event)) {
            return false;
        }
        if (!timestamp.equals(that.timestamp)) {
            return false;
        }

        return true;
    }

    @Override
    public int hashCode() {
        int result = timestamp.hashCode();
        result = 31 * result + event.hashCode();
        return result;
    }
}