com.ibm.streamsx.edgevideo.device.edgent.JsonFaceEvent.java Source code

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Here is the source code for com.ibm.streamsx.edgevideo.device.edgent.JsonFaceEvent.java

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/*
# Licensed Materials - Property of IBM
# Copyright IBM Corp. 2017
 */
package com.ibm.streamsx.edgevideo.device.edgent;

import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.util.TimeZone;

import org.opencv.core.Mat;

import com.google.gson.JsonObject;

/**
 * Face detection event info to/from a JsonObject
 */
@SuppressWarnings("javadoc")
public class JsonFaceEvent {
    private static DateFormat timestampFormatter = newIso8601Formatter();

    /** Create a JsonObject FaceEvent */
    public static JsonObject toJsonObject(long timestamp, Mat face) {

        JsonObject payload = new JsonObject();
        payload.addProperty("timestamp", encodeTimestamp(timestamp));
        payload.add("face", JsonMat.toJsonObject(face));

        return payload;
    }

    /** Get the timestamp from a FaceEvent */
    public static String getTimestamp(JsonObject faceEvent) {
        return faceEvent.get("timestamp").getAsString();
    }

    /** Get the face from a FaceEvent */
    public static Mat getFace(JsonObject faceEvent) {
        return JsonMat.fromJsonObject(faceEvent.getAsJsonObject("face"));
    }

    private static String encodeTimestamp(long timestamp) {
        synchronized (timestampFormatter) {
            return timestampFormatter.format(timestamp);
        }
    }

    private static DateFormat newIso8601Formatter() {
        DateFormat df = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ss.SSSXXX");
        df.setTimeZone(TimeZone.getTimeZone("UTC"));
        return df;
    }

}