--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/artifacts/src/main/java/org/dive4elements/river/exports/AbstractChartGenerator.java	Tue May 29 11:35:44 2018 +0200
@@ -0,0 +1,77 @@
+/** Copyright (C) 2017 by Bundesanstalt für Gewässerkunde
+ * Software engineering by
+ *  Björnsen Beratende Ingenieure GmbH
+ *  Dr. Schumacher Ingenieurbüro für Wasser und Umwelt
+ *
+ * This file is Free Software under the GNU AGPL (>=v3)
+ * and comes with ABSOLUTELY NO WARRANTY! Check out the
+ * documentation coming with Dive4Elements River for details.
+ */
+package org.dive4elements.river.exports;
+
+import javax.xml.xpath.XPathConstants;
+
+import org.dive4elements.artifacts.ArtifactNamespaceContext;
+import org.dive4elements.artifacts.CallContext;
+import org.dive4elements.artifacts.common.utils.XMLUtils;
+import org.dive4elements.river.artifacts.D4EArtifact;
+import org.dive4elements.river.artifacts.access.RangeAccess;
+import org.dive4elements.river.artifacts.access.RiverAccess;
+import org.jfree.chart.JFreeChart;
+import org.jfree.chart.title.TextTitle;
+import org.w3c.dom.Document;
+
+/**
+ * @author Gernot Belger
+ */
+// FIXME: this class is intended to contain all duplicate code from ChartGenerator and ChartGenerator2; who will clean
+// up this mess...?
+abstract class AbstractChartGenerator implements OutGenerator {
+    private static final String XPATH_CHART_EXPORT = "/art:action/art:attributes/art:export/@art:value";
+
+    // TODO: move real code here
+    protected abstract D4EArtifact getArtifact();
+
+    /** The CallContext object. */
+    // TODO: move real code here
+    protected abstract CallContext getContext();
+
+    /** The document of the incoming out() request. */
+    // TODO: move real code here
+    protected abstract Document getRequest();
+
+    /**
+     * Adds a metadata sub-title to the chart if it gets exported
+     */
+    protected final void addMetadataSubtitle(final JFreeChart chart) {
+        if (isExport()) {
+            final String text = ChartExportHelper.createMetadataSubtitle(getArtifact(), getContext(), getRiverName());
+            chart.addSubtitle(new TextTitle(text));
+        }
+    }
+
+    /**
+     * This method returns the export flag specified in the <i>request</i> document
+     * or <i>false</i> if no export is specified in <i>request</i>.
+     */
+    protected final boolean isExport() {
+        final Boolean export = (Boolean) XMLUtils.xpath(getRequest(), XPATH_CHART_EXPORT, XPathConstants.BOOLEAN, ArtifactNamespaceContext.INSTANCE);
+
+        return export == null ? false : export;
+    }
+
+    protected final String getRiverName() {
+        return new RiverAccess(getArtifact()).getRiver().getName();
+    }
+
+    protected final String getRiverUnit() {
+        return new RiverAccess(getArtifact()).getRiver().getWstUnit().getName();
+    }
+
+    protected final double[] getRange() {
+        final D4EArtifact flys = getArtifact();
+
+        final RangeAccess rangeAccess = new RangeAccess(flys);
+        return rangeAccess.getKmRange();
+    }
+}
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