[CM-1580]: Implemented Curve, DataPoint data types as well as CurveData DTO.

Author: yaricom

comet-java-client/src/main/java/ml/comet/experiment/impl/rest/CurveData.java

@@ -0,0 +1,37 @@
+package ml.comet.experiment.impl.rest;
+
+import com.fasterxml.jackson.annotation.JsonInclude;
+import lombok.Data;
+import ml.comet.experiment.model.Curve;
+import ml.comet.experiment.model.DataPoint;
+
+@Data
+@JsonInclude(JsonInclude.Include.NON_NULL)
+@SuppressWarnings("checkstyle:MemberName")
+public class CurveData {
+    private String name;
+    private float[] x;
+    private float[] y;
+
+    private CurveData() {
+    }
+
+    /**
+     * The factory to create data from provided {@code Curve} instance.
+     *
+     * @param curve the {@code Curve} instance.
+     * @return the initialized data holder.
+     */
+    public static CurveData from(Curve curve) {
+        CurveData data = new CurveData();
+        data.name = curve.getName();
+        DataPoint[] dataPoints = curve.getDataPoints();
+        data.x = new float[dataPoints.length];
+        data.y = new float[dataPoints.length];
+        for (int i = 0; i < dataPoints.length; i++) {
+            data.x[i] = dataPoints[i].getX();
+            data.y[i] = dataPoints[i].getY();
+        }
+        return data;
+    }
+}

comet-java-client/src/main/java/ml/comet/experiment/model/Curve.java

@@ -0,0 +1,25 @@
+package ml.comet.experiment.model;
+
+import lombok.Data;
+import lombok.NonNull;
+
+/**
+ * Represents data of the curve as x/y pairs.
+ */
+@Data
+@SuppressWarnings("checkstyle:MemberName")
+public class Curve {
+    private DataPoint[] dataPoints;
+    private String name;
+
+    /**
+     * Creates new instance with specified parameters.
+     *
+     * @param dataPoints the curve data points.
+     * @param name       the name of the curve.
+     */
+    public Curve(@NonNull DataPoint[] dataPoints, @NonNull String name) {
+        this.dataPoints = dataPoints;
+        this.name = name;
+    }
+}

comet-java-client/src/main/java/ml/comet/experiment/model/DataPoint.java

@@ -0,0 +1,26 @@
+package ml.comet.experiment.model;
+
+import lombok.AllArgsConstructor;
+import lombok.Data;
+
+/**
+ * Represents particular data point on the two dimensional curve.
+ */
+@Data
+@AllArgsConstructor
+@SuppressWarnings("checkstyle:MemberName")
+public class DataPoint {
+    private float x;
+    private float y;
+
+    /**
+     * Creates new instance with specified data.
+     *
+     * @param x the value by X-axis.
+     * @param y the value by Y-axis.
+     * @return initialized instance of {@code DataPoint} with provided values.
+     */
+    public static DataPoint of(float x, float y) {
+        return new DataPoint(x, y);
+    }
+}