do not delete temp directory

gradle.properties

@@ -1,6 +1,6 @@
 group = org.xbib.graphics
 name = graphics
-version = 4.0.3
+version = 4.0.4
 
 gradle.wrapper.version = 6.6.1
 pdfbox.version = 2.0.23
@@ -9,7 +9,7 @@ zxing.version = 3.3.1
 reflections.version = 0.9.11
 jfreechart.version = 1.5.1
 batik.version = 1.13
-junit.version = 5.7.1
+junit.version = 5.7.2
 junit4.version = 4.13.2
 groovy.version = 2.5.12
 spock.version = 1.3-groovy-2.5

gradle/test/junit5.gradle

@@ -13,8 +13,10 @@ test {
     useJUnitPlatform()
     failFast = false
     environment 'TMPDIR', '/var/tmp/gs'
+    file('/var/tmp/gs').mkdirs()
     systemProperty 'java.awt.headless', 'true'
     systemProperty 'java.io.tmpdir', '/var/tmp/'
+    systemProperty 'jna.tmpdir', '/var/tmp/'
     systemProperty 'jna.debug', 'false'
     systemProperty 'java.util.logging.config.file', 'src/test/resources/logging.properties'
     testLogging {

graphics-chart/src/main/java/org/xbib/graphics/chart/series/AxesChartSeriesNumericalNoErrorBars.java

@@ -12,8 +12,10 @@ import java.util.List;
  */
 public abstract class AxesChartSeriesNumericalNoErrorBars extends MarkerSeries {
 
-    protected List<?> xData; // can be Number or Instant
+    protected List<?> xData;
+
     protected List<? extends Number> yData;
+
     protected List<? extends Number> extraValues;
 
     public AxesChartSeriesNumericalNoErrorBars(String name,
@@ -30,11 +32,9 @@ public abstract class AxesChartSeriesNumericalNoErrorBars extends MarkerSeries {
 
     @Override
     protected void calculateMinMax() {
-        // xData
         List<Double> xMinMax = findMinMax(xData);
         setXMin(xMinMax.get(0));
         setXMax(xMinMax.get(1));
-        // yData
         List<Double> yMinMax;
         if (extraValues == null) {
             yMinMax = findMinMax(yData);
@@ -46,6 +46,9 @@ public abstract class AxesChartSeriesNumericalNoErrorBars extends MarkerSeries {
     }
 
     List<Double> findMinMax(List<?> data) {
+        if (data == null) {
+            return Arrays.asList(null, null);
+        }
         Double min = null;
         Double max = null;
         for (Object dataPoint : data) {
@@ -113,7 +116,10 @@ public abstract class AxesChartSeriesNumericalNoErrorBars extends MarkerSeries {
     }
 
     private List<Double> findMinMaxWithErrorBars(List<? extends Number> data,
-                                             List<? extends Number> errorBars) {
+                                                 List<? extends Number> errorBars) {
+        if (data == null) {
+            return Arrays.asList(Double.MAX_VALUE, Double.MAX_VALUE);
+        }
         double min = Double.MAX_VALUE;
         double max = -Double.MAX_VALUE;
         for (int i = 0; i < data.size(); i++) {

graphics-chart/src/main/java/org/xbib/graphics/chart/xy/XYSeries.java

@@ -7,7 +7,7 @@ import org.xbib.graphics.chart.legend.LegendRenderType;
 import java.util.List;
 
 /**
- * A Series containing X and Y data to be plotted on a Chart
+ * A Series containing X and Y data to be plotted on a Chart.
  */
 public class XYSeries extends AxesChartSeriesNumericalNoErrorBars {
 
@@ -33,6 +33,4 @@ public class XYSeries extends AxesChartSeriesNumericalNoErrorBars {
     public LegendRenderType getLegendRenderType() {
         return xySeriesRenderStyle.getLegendRenderType();
     }
-
-
 }

graphics-chart/src/test/java/org/xbib/graphics/chart/MatlabTest.java

@@ -2,6 +2,7 @@ package org.xbib.graphics.chart;
 
 import org.junit.jupiter.api.Test;
 import org.xbib.graphics.chart.io.VectorGraphicsFormat;
+import org.xbib.graphics.chart.legend.LegendPosition;
 import org.xbib.graphics.chart.theme.MatlabTheme;
 import org.xbib.graphics.chart.xy.XYChart;
 import org.xbib.graphics.chart.xy.XYChartBuilder;
@@ -16,7 +17,7 @@ import java.util.List;
 public class MatlabTest {
 
     @Test
-    public void testMatlabInstants() throws IOException {
+    public void testMatlabInstantsWithDoubles() throws IOException {
         XYChart chart = new XYChartBuilder().width(800).height(600)
                 .theme(new MatlabTheme())
                 .title("Matlab Theme")
@@ -61,7 +62,53 @@ public class MatlabTest {
         chart.addSeries("downloads", xData, y1Data);
         chart.addSeries("price", xData, y2Data);
 
-        chart.write(Files.newOutputStream(Paths.get("build/matlab.svg")),
+        chart.write(Files.newOutputStream(Paths.get("build/matlab1.svg")),
                 VectorGraphicsFormat.SVG);
     }
+
+    @Test
+    public void testMatlabInstantsWitInts() throws IOException {
+        XYChart chart = new XYChartBuilder()
+                .width(800)
+                .height(600)
+                .theme(new MatlabTheme())
+                .title("Matlab Style Demo")
+                .xAxisTitle("X")
+                .yAxisTitle("Y")
+                .build();
+        chart.getStyler().setLegendPosition(LegendPosition.OutsideE);
+        chart.getStyler().setDatePattern("LLL yyyy");
+        chart.getStyler().setPlotGridLinesVisible(true);
+        chart.getStyler().setYAxisMin(0.0d);
+
+        List<Instant> xData = new ArrayList<>();
+        List<Integer> y1Data = new ArrayList<>();
+
+        xData.add(Instant.parse("2012-01-01T00:00:00Z"));
+        y1Data.add(120);
+
+        xData.add(Instant.parse("2012-02-01T00:00:00Z"));
+        y1Data.add(165);
+
+        xData.add(Instant.parse("2012-03-01T00:00:00Z"));
+        y1Data.add(210);
+
+        xData.add(Instant.parse("2012-04-01T00:00:00Z"));
+        y1Data.add(400);
+
+        xData.add(Instant.parse("2012-05-01T00:00:00Z"));
+        y1Data.add(80);
+
+        xData.add(Instant.parse("2012-06-01T00:00:00Z"));
+        y1Data.add(200);
+
+        xData.add(Instant.parse("2012-07-01T00:00:00Z"));
+        y1Data.add(300);
+
+        chart.addSeries("Anzahl", xData, y1Data);
+
+        chart.write(Files.newOutputStream(Paths.get("build/matlab2.svg")),
+                VectorGraphicsFormat.SVG);
+    }
+
 }

graphics-ghostscript/src/main/java/org/xbib/graphics/ghostscript/Ghostscript.java

@@ -11,13 +11,9 @@ import org.xbib.graphics.ghostscript.internal.NullOutputStream;
 import java.io.IOException;
 import java.io.InputStream;
 import java.io.OutputStream;
-import java.nio.file.FileVisitResult;
 import java.nio.file.Files;
-import java.nio.file.NoSuchFileException;
 import java.nio.file.Path;
 import java.nio.file.Paths;
-import java.nio.file.SimpleFileVisitor;
-import java.nio.file.attribute.BasicFileAttributes;
 import java.time.LocalDate;
 import java.time.format.DateTimeFormatter;
 import java.util.Arrays;
@@ -99,7 +95,6 @@ public class Ghostscript {
                 nativeInstanceByRef = null;
             }
             instance = null;
-            deleteTmp();
         }
     }
 
@@ -326,38 +321,9 @@ public class Ghostscript {
             throw new IllegalStateException("no TEMP/TMPDIR environment set for ghostscript");
         }
         tmpDir = Paths.get(tmp);
-        deleteTmp();
-        Files.createDirectories(tmpDir);
-    }
-
-    private static void deleteTmp() throws IOException {
-        if (tmpDir == null) {
-            return;
-        }
         if (!Files.exists(tmpDir)) {
-            return;
+            Files.createDirectories(tmpDir);
-        }
-        try {
-            Files.walkFileTree(tmpDir, new SimpleFileVisitor<>() {
-                @Override
-                public FileVisitResult visitFile(Path file, BasicFileAttributes attrs) throws IOException {
-                    logger.info("deleting " + file);
-                    Files.deleteIfExists(file);
-                    return FileVisitResult.CONTINUE;
-                }
-
-                @Override
-                public FileVisitResult postVisitDirectory(Path dir, IOException exc) throws IOException {
-                    logger.info("deleting " + dir);
-                    Files.deleteIfExists(dir);
-                    return FileVisitResult.CONTINUE;
-                }
-            });
-        } catch (NoSuchFileException e) {
-            logger.log(Level.WARNING, e.getMessage(), e);
-        } finally {
-            logger.info("deleting " + tmpDir);
-            Files.deleteIfExists(tmpDir);
         }
+        // never delete TMPDIR or TEMP automatically, it might be a shared directory
     }
 }