refactor: extract PartialCursor record

Author: metacosm

measure/src/main/java/net/laprun/sustainability/power/measure/Cursor.java

@@ -60,44 +60,4 @@ public static PartialCursor cursorOver(long[] timestamps, long timestamp, Durati
 
         return new PartialCursor(startIndex, endIndex, startRatio, endRatio);
     }
-
-    public record PartialCursor(int startIndex, int endIndex, double firstMeasureRatio, double lastMeasureRatio) {
-
-        public static final PartialCursor empty = new PartialCursor(-1, -1, 0.0, 0.0);
-
-        public double sum(double[] values) {
-            if (values == null || values.length == 0 || this == empty || values.length < startIndex + endIndex) {
-                return 0.0;
-            }
-
-            if (startIndex == endIndex) {
-                return values[startIndex] * firstMeasureRatio;
-            }
-
-            double sum = values[startIndex] * firstMeasureRatio;
-            for (int i = startIndex + 1; i < endIndex; i++) {
-                sum += values[i];
-            }
-            sum += values[endIndex] * lastMeasureRatio;
-
-            return sum;
-        }
-
-        public double[] viewOf(double[] values) {
-            if (values == null || values.length == 0 || this == empty || values.length < startIndex + endIndex) {
-                return new double[0];
-            }
-
-            if (startIndex == endIndex) {
-                return new double[] { values[startIndex] * firstMeasureRatio };
-            }
-
-            final int len = endIndex - startIndex + 1;
-            final double[] view = new double[len];
-            view[0] = values[startIndex] * firstMeasureRatio;
-            System.arraycopy(values, startIndex + 1, view, 1, len - 1 - 1);
-            view[len - 1] = values[endIndex] * lastMeasureRatio;
-            return view;
-        }
-    }
 }

measure/src/main/java/net/laprun/sustainability/power/measure/PartialCursor.java

@@ -0,0 +1,41 @@
+package net.laprun.sustainability.power.measure;
+
+public record PartialCursor(int startIndex, int endIndex, double firstMeasureRatio, double lastMeasureRatio) {
+
+    public static final PartialCursor empty = new PartialCursor(-1, -1, 0.0, 0.0);
+
+    public double sum(double[] values) {
+        if (values == null || values.length == 0 || this == empty || values.length <= endIndex) {
+            return 0.0;
+        }
+
+        if (startIndex == endIndex) {
+            return values[startIndex] * firstMeasureRatio;
+        }
+
+        double sum = values[startIndex] * firstMeasureRatio;
+        for (int i = startIndex + 1; i < endIndex; i++) {
+            sum += values[i];
+        }
+        sum += values[endIndex] * lastMeasureRatio;
+
+        return sum;
+    }
+
+    public double[] viewOf(double[] values) {
+        if (values == null || values.length == 0 || this == empty || values.length < startIndex + endIndex) {
+            return new double[0];
+        }
+
+        if (startIndex == endIndex) {
+            return new double[] { values[startIndex] * firstMeasureRatio };
+        }
+
+        final int len = endIndex - startIndex + 1;
+        final double[] view = new double[len];
+        view[0] = values[startIndex] * firstMeasureRatio;
+        System.arraycopy(values, startIndex + 1, view, 1, len - 1 - 1);
+        view[len - 1] = values[endIndex] * lastMeasureRatio;
+        return view;
+    }
+}