io.druid.query.select.EventHolder.java Source code

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Here is the source code for io.druid.query.select.EventHolder.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.query.select;

import com.fasterxml.jackson.annotation.JsonCreator;
import com.fasterxml.jackson.annotation.JsonProperty;
import com.google.common.collect.Maps;
import com.metamx.common.ISE;
import org.joda.time.DateTime;

import java.util.Map;

/**
 */
public class EventHolder {
    public static final String timestampKey = "timestamp";

    private final String segmentId;
    private final int offset;
    private final Map<String, Object> event;

    @JsonCreator
    public EventHolder(@JsonProperty("segmentId") String segmentId, @JsonProperty("offset") int offset,
            @JsonProperty("event") Map<String, Object> event) {
        this.segmentId = segmentId;
        this.offset = offset;
        this.event = event;
    }

    public DateTime getTimestamp() {
        Object retVal = event.get(timestampKey);
        if (retVal instanceof String) {
            return new DateTime(retVal);
        } else if (retVal instanceof DateTime) {
            return (DateTime) retVal;
        } else {
            throw new ISE("Do not understand format [%s]", retVal.getClass());
        }
    }

    @JsonProperty
    public String getSegmentId() {
        return segmentId;
    }

    @JsonProperty
    public int getOffset() {
        return offset;
    }

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

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

        EventHolder that = (EventHolder) o;

        if (offset != that.offset) {
            return false;
        }
        if (!Maps.difference(event, ((EventHolder) o).event).areEqual()) {
            return false;
        }
        if (segmentId != null ? !segmentId.equals(that.segmentId) : that.segmentId != null) {
            return false;
        }

        return true;
    }

    @Override
    public int hashCode() {
        int result = segmentId != null ? segmentId.hashCode() : 0;
        result = 31 * result + offset;
        result = 31 * result + (event != null ? event.hashCode() : 0);
        return result;
    }

    @Override
    public String toString() {
        return "EventHolder{" + "segmentId='" + segmentId + '\'' + ", offset=" + offset + ", event=" + event + '}';
    }
}