--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/artifacts/src/main/java/org/dive4elements/river/artifacts/sinfo/common/AbstractSInfoExporter.java	Thu Mar 01 18:49:34 2018 +0100
@@ -0,0 +1,167 @@
+/** 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.artifacts.sinfo.common;
+
+import java.io.OutputStream;
+import java.util.Collection;
+import java.util.HashMap;
+import java.util.Map;
+
+import org.apache.log4j.Logger;
+import org.dive4elements.artifacts.CallMeta;
+import org.dive4elements.artifacts.common.utils.Config;
+import org.dive4elements.river.artifacts.model.CalculationResult;
+import org.dive4elements.river.artifacts.resources.Resources;
+import org.dive4elements.river.artifacts.sinfo.util.MetaAndTableJRDataSource;
+import org.dive4elements.river.artifacts.sinfo.util.RiverInfo;
+import org.dive4elements.river.exports.AbstractExporter;
+
+import au.com.bytecode.opencsv.CSVWriter;
+import net.sf.jasperreports.engine.JRDataSource;
+import net.sf.jasperreports.engine.JRException;
+import net.sf.jasperreports.engine.JasperExportManager;
+import net.sf.jasperreports.engine.JasperFillManager;
+import net.sf.jasperreports.engine.JasperPrint;
+
+/**
+ * @author Gernot Belger
+ */
+public abstract class AbstractSInfoExporter<ROW extends AbstractSInfoResultRow, RESULT extends AbstractSInfoCalculationResult<ROW>, RESULTS extends AbstractSInfoCalculationResults<ROW, RESULT>> extends AbstractExporter {
+
+    /** The storage that contains the current calculation result. */
+    private RESULTS data = null;
+
+    protected abstract Logger getLog();
+
+    public RESULTS getData() {
+        return this.data;
+    }
+
+    @Override
+    protected final void addData(final Object d) {
+        /* reset */
+        this.data = null;
+
+        if (d instanceof CalculationResult) {
+
+            final Object dat = ((CalculationResult) d).getData();
+            if (dat != null)
+                this.data = (RESULTS) dat;
+        }
+    }
+
+    @Override
+    protected final void writeCSVData(final CSVWriter writer) {
+        getLog().info("writeCSVData");
+
+        /* fetch calculation results */
+        final RESULTS results = this.data;
+
+        final RiverInfo river = results.getRiver();
+
+        /* write as csv */
+        writeCSVMeta(writer, results);
+        writeCSVHeader(writer, river);
+
+        for (final RESULT result : results.getResults()) {
+            writeCSVResult(writer, result);
+        }
+    }
+
+    protected abstract void writeCSVHeader(final CSVWriter writer, final RiverInfo river);
+
+    protected abstract void writeCSVMeta(final CSVWriter writer, final RESULTS results);
+
+    protected final void writeCSVMetaEntry(final CSVWriter writer, final String message, final Object... messageArgs) {
+
+        final CallMeta meta = this.context.getMeta();
+
+        writer.writeNext(new String[] { Resources.getMsg(meta, message, message, messageArgs) });
+    }
+
+    protected final void writeCSVResult(final CSVWriter writer, final RESULT result) {
+
+        writeCSVResultHeader(writer, result);
+
+        /* nwo the value rows */
+        final Collection<ROW> rows = result.getRows();
+        for (final ROW row : rows) {
+            writeCSVRow(writer, row);
+        }
+    }
+
+    protected abstract void writeCSVResultHeader(CSVWriter writer, RESULT result);
+
+    protected final void writeCSVRow(final CSVWriter writer, final ROW row) {
+        getLog().debug("writeCSVFlowDepthRow");
+
+        final String[] formattedRow = formatCSVRow(row);
+        writer.writeNext(formattedRow);
+    }
+
+    protected abstract String[] formatCSVRow(final ROW row);
+
+    @Override
+    protected final void writePDF(final OutputStream outStream) {
+        getLog().debug("write PDF");
+
+        final JRDataSource source = createJRData();
+
+        final String confPath = Config.getConfigDirectory().toString();
+
+        // FIXME: distinguish between with and without tkh: we need two jasper reports!
+
+        final Map<String, Object> parameters = new HashMap<>();
+        parameters.put("ReportTitle", "Exported Data");
+
+        try {
+            final String jasperPath = confPath + getJasperFile();
+
+            final JasperPrint print = JasperFillManager.fillReport(jasperPath, parameters, source);
+            JasperExportManager.exportReportToPdfStream(print, outStream);
+        }
+        catch (final JRException je) {
+            getLog().warn("Error generating PDF Report!", je);
+        }
+    }
+
+    protected abstract String getJasperFile();
+
+    private JRDataSource createJRData() {
+
+        /* fetch calculation results */
+        final RESULTS results = this.data;
+
+        final MetaAndTableJRDataSource source = new MetaAndTableJRDataSource();
+
+        addJRMetaData(source, results);
+
+        for (final RESULT result : results.getResults()) {
+            addJRTableData(source, result);
+        }
+
+        return source;
+    }
+
+    protected abstract void addJRMetaData(final MetaAndTableJRDataSource source, final RESULTS results);
+
+    protected final void addJRTableData(final MetaAndTableJRDataSource source, final RESULT result) {
+
+        final Collection<ROW> rows = result.getRows();
+
+        for (final ROW row : rows) {
+
+            final String[] formattedRow = formatPDFRow(row);
+            source.addData(formattedRow);
+        }
+    }
+
+    protected abstract String[] formatPDFRow(final ROW row);
+}
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