added CSV export

xchart-demo/src/main/java/com/xeiam/xchart/standalone/CSVChart.java

@@ -21,6 +21,7 @@
  */
 package com.xeiam.xchart.standalone;
 
+import com.xeiam.xchart.CSVExporter;
 import com.xeiam.xchart.CSVImporter;
 import com.xeiam.xchart.CSVImporter.DataOrientation;
 import com.xeiam.xchart.Chart;
@@ -36,6 +37,8 @@ public class CSVChart {
     // import chart from a folder containing CSV files
     Chart chart = CSVImporter.getChartFromCSVDir("./CSV/CSVChart/", DataOrientation.Rows, 600, 400);
 
+    CSVExporter.writeCSVRows(chart.getSeriesMap().get(0), "./CSV/CSVChartExport/");
+
     // Show it
     new SwingWrapper(chart).displayChart();
 

xchart/src/main/java/com/xeiam/xchart/CSVExporter.java

+/**
+ * Copyright (c) 2013 Knowmtech <http://knowmtech.com>
+ * 
+ * All rights reserved. No warranty, explicit or implicit, provided. In no event shall the author be liable for any claim or damages.
+ * 
+ * IMPORTANT: THIS CODE IS PROPRIETARY!!! ABSOLUTELY NO DUPLICATION OR DISTRIBUTION IS PERMITTED WITHOUT EXPRESS WRITTEN PERMISSION FROM:
+ * M. ALEXANDER NUGENT CONSULTING 22B STACY RD, SANTA FE NM 87585 (505)-988-7016 i@alexnugent.name
+ */
+package com.xeiam.xchart;
+
+import java.io.BufferedWriter;
+import java.io.File;
+import java.io.FileOutputStream;
+import java.io.IOException;
+import java.io.OutputStreamWriter;
+import java.io.Writer;
+import java.util.Collection;
+import java.util.Iterator;
+
+/**
+ * @author timmolter
+ */
+public class CSVExporter {
+
+  public static void writeCSVRows(Series series, String path2Dir) {
+
+    File newFile = new File(path2Dir + series.getName() + ".csv");
+    Writer out = null;
+    try {
+
+      out = new BufferedWriter(new OutputStreamWriter(new FileOutputStream(newFile), "UTF8"));
+      String csv = join(series.getxData(), ",") + System.getProperty("line.separator");
+      out.write(csv);
+      csv = join(series.getyData(), ",") + System.getProperty("line.separator");
+      out.write(csv);
+
+    } catch (Exception e) {
+      e.printStackTrace();
+    } finally {
+      if (out != null) {
+        try {
+          out.flush();
+          out.close();
+        } catch (IOException e) {
+          // NOP
+        }
+      }
+    }
+
+  }
+
+  public static void writeCSVColumns(Series series, String path2Dir) {
+
+    File newFile = new File(path2Dir + series.getName() + ".csv");
+    Writer out = null;
+    try {
+
+      out = new BufferedWriter(new OutputStreamWriter(new FileOutputStream(newFile), "UTF8"));
+      Collection<?> xData = series.getxData();
+      Collection<?> yData = series.getyData();
+      Iterator<?> itrx = xData.iterator();
+      Iterator<?> itry = yData.iterator();
+      while (itrx.hasNext()) {
+        Number xDataPoint = (Number) itrx.next();
+        Number yDataPoint = (Number) itry.next();
+        String csv = xDataPoint + "," + yDataPoint + System.getProperty("line.separator");
+        out.write(csv);
+      }
+
+    } catch (Exception e) {
+      e.printStackTrace();
+    } finally {
+      if (out != null) {
+        try {
+          out.flush();
+          out.close();
+        } catch (IOException e) {
+          // NOP
+        }
+      }
+    }
+
+  }
+
+  private static String join(Collection<? extends Object> collection, String separator) {
+
+    if (collection == null) {
+      return null;
+    }
+    Iterator iterator = collection.iterator();
+    // handle null, zero and one elements before building a buffer
+    if (iterator == null) {
+      return null;
+    }
+    if (!iterator.hasNext()) {
+      return "";
+    }
+    Object first = iterator.next();
+    if (!iterator.hasNext()) {
+      return first == null ? "" : first.toString();
+    }
+
+    // two or more elements
+    StringBuffer buf = new StringBuffer(256); // Java default is 16, probably too small
+    if (first != null) {
+      buf.append(first);
+    }
+
+    while (iterator.hasNext()) {
+      if (separator != null) {
+        buf.append(separator);
+      }
+      Object obj = iterator.next();
+      if (obj != null) {
+        buf.append(obj);
+      }
+    }
+    return buf.toString();
+
+  }
+}