--- a/flys-artifacts/src/main/java/de/intevation/flys/exports/XYChartGenerator.java	Fri Dec 16 11:47:57 2011 +0000
+++ b/flys-artifacts/src/main/java/de/intevation/flys/exports/XYChartGenerator.java	Fri Dec 16 13:37:58 2011 +0000
@@ -112,6 +112,31 @@
     }
 
 
+    /**
+     * A mini interface that allows to walk over the YAXIS enums defined in
+     * subclasses.
+     */
+    public interface YAxisWalker {
+        int length();
+        String getId(int idx);
+    }
+
+
+    protected YAxisWalker getYAxisWalker() {
+        return new YAxisWalker() {
+            @Override
+            public int length() {
+                return 0;
+            }
+
+            @Override
+            public String getId(int idx) {
+                return null;
+            }
+        };
+    }
+
+
     /** The logger that is used in this generator. */
     private static Logger logger = Logger.getLogger(XYChartGenerator.class);
 
@@ -206,6 +231,16 @@
      */
     protected abstract String getYAxisLabel();
 
+
+    /**
+     * Returns the Y-Axis label of a chart at position <i>pos</i>.
+     *
+     * @return the Y-Axis label of a chart at position <i>0</i>.
+     */
+    protected String getYAxisLabel(int pos) {
+        return getYAxisLabel();
+    }
+
     /**
      * Generate chart.
      */
@@ -922,13 +957,27 @@
 
 
     /**
-     * Creates new Sections for chart axes. Subclasses of this ChartGenerator
-     * should override this method to include all necessary Y axes in that
-     * concrete chart. The only Section contained in the list is the X axis.
+     * Creates a list of Sections that contains all axes of the chart (including
+     * X and Y axes).
+     *
+     * @return a list of Sections for each axis in this chart.
+     */
+    protected List<Section> buildAxisSections() {
+        List<Section> axisSections = new ArrayList<Section>();
+
+        axisSections.addAll(buildXAxisSections());
+        axisSections.addAll(buildYAxisSections());
+
+        return axisSections;
+    }
+
+
+    /**
+     * Creates a new Section for chart's X axis.
      *
      * @return a List that contains a Section for the X axis.
      */
-    protected List<Section> buildAxisSections() {
+    protected List<Section> buildXAxisSections() {
         List<Section> axisSections = new ArrayList<Section>();
 
         String identifier = "X";
@@ -948,5 +997,37 @@
 
         return axisSections;
     }
+
+
+    /**
+     * Creates a list of Section for the chart's Y axes. This method makes use
+     * of <i>getYAxisWalker</i> to be able to access all Y axes defined in
+     * subclasses.
+     *
+     * @return a list of Y axis sections.
+     */
+    protected List<Section> buildYAxisSections() {
+        List<Section> axisSections = new ArrayList<Section>();
+
+        YAxisWalker walker = getYAxisWalker();
+        for (int i = 0, n = walker.length(); i < n; i++) {
+            AxisSection ySection = new AxisSection();
+            ySection.setIdentifier(walker.getId(i));
+            ySection.setLabel(getYAxisLabel(i));
+            ySection.setFontSize(14);
+            ySection.setFixed(false);
+
+            // XXX We are able to find better default ranges that [0,0], the
+            // only problem is, that we do NOT have a better range than [0,0]
+            // for each axis, because the initial chart will not have a dataset
+            // for each axis set!
+            ySection.setUpperRange(0d);
+            ySection.setLowerRange(0d);
+
+            axisSections.add(ySection);
+        }
+
+        return axisSections;
+    }
 }
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