Initial data commit

Task/Text-processing-1/Java/text-processing-1.java

@@ -0,0 +1,89 @@
+import java.io.File;
+import java.util.*;
+import static java.lang.System.out;
+
+public class TextProcessing1 {
+
+    public static void main(String[] args) throws Exception {
+        Locale.setDefault(new Locale("en", "US"));
+        Metrics metrics = new Metrics();
+
+        int dataGap = 0;
+        String gapBeginDate = null;
+        try (Scanner lines = new Scanner(new File("readings.txt"))) {
+            while (lines.hasNextLine()) {
+
+                double lineTotal = 0.0;
+                int linePairs = 0;
+                int lineInvalid = 0;
+                String lineDate;
+
+                try (Scanner line = new Scanner(lines.nextLine())) {
+
+                    lineDate = line.next();
+
+                    while (line.hasNext()) {
+                        final double value = line.nextDouble();
+                        if (line.nextInt() <= 0) {
+                            if (dataGap == 0)
+                                gapBeginDate = lineDate;
+                            dataGap++;
+                            lineInvalid++;
+                            continue;
+                        }
+                        lineTotal += value;
+                        linePairs++;
+
+                        metrics.addDataGap(dataGap, gapBeginDate, lineDate);
+                        dataGap = 0;
+                    }
+                }
+                metrics.addLine(lineTotal, linePairs);
+                metrics.lineResult(lineDate, lineInvalid, linePairs, lineTotal);
+            }
+            metrics.report();
+        }
+    }
+
+    private static class Metrics {
+        private List<String[]> gapDates;
+        private int maxDataGap = -1;
+        private double total;
+        private int pairs;
+        private int lineResultCount;
+
+        void addLine(double tot, double prs) {
+            total += tot;
+            pairs += prs;
+        }
+
+        void addDataGap(int gap, String begin, String end) {
+            if (gap > 0 && gap >= maxDataGap) {
+                if (gap > maxDataGap) {
+                    maxDataGap = gap;
+                    gapDates = new ArrayList<>();
+                }
+                gapDates.add(new String[]{begin, end});
+            }
+        }
+
+        void lineResult(String date, int invalid, int prs, double tot) {
+            if (lineResultCount >= 3)
+                return;
+            out.printf("%10s  out: %2d  in: %2d  tot: %10.3f  avg: %10.3f%n",
+                    date, invalid, prs, tot, (prs > 0) ? tot / prs : 0.0);
+            lineResultCount++;
+        }
+
+        void report() {
+            out.printf("%ntotal    = %10.3f%n", total);
+            out.printf("readings = %6d%n", pairs);
+            out.printf("average  = %010.3f%n", total / pairs);
+            out.printf("%nmaximum run(s) of %d invalid measurements: %n",
+                    maxDataGap);
+            for (String[] dates : gapDates)
+                out.printf("begins at %s and ends at %s%n", dates[0], dates[1]);
+
+        }
+    }
+}