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SDK to implement Numaflow Source or User Defined Functions or Sinks in Java.

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package io.numaproj.numaflow.reducer;


import lombok.AllArgsConstructor;

import java.time.Instant;
import java.util.Map;

@AllArgsConstructor
class HandlerDatum implements Datum {
    private byte[] value;
    private Instant watermark;
    private Instant eventTime;
    private Map headers;

    @Override
    public Instant getWatermark() {
        return this.watermark;
    }

    @Override
    public byte[] getValue() {
        return this.value;
    }

    @Override
    public Instant getEventTime() {
        return this.eventTime;
    }

    @Override
    public Map getHeaders() {
        return this.headers;
    }
}