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package org.graalvm.visualvm.lib.profiler.snaptracer.impl.export;

import org.graalvm.visualvm.lib.profiler.snaptracer.TracerProgressObject;
import java.io.IOException;
import java.io.Writer;
import javax.swing.table.TableModel;

/**
 *
 * @author Jiri Sedlacek
 */
final class XMLExporter extends Exporter {

    private float step = 1;
    private int lastStep = 0;


    protected int getSteps(TableModel model) {
        int steps = model.getRowCount();
        if (steps > MAX_STEPS) {
            step = MAX_STEPS / (float)steps;
            steps = MAX_STEPS;
        }
        return steps;
    }

    protected void writeHeader(TableModel model, String title, Writer writer,
                               TracerProgressObject progress) throws IOException {
        writeLine(writer, "<?xml version=\"1.0\" encoding=\"UTF-8\"?>"); // NOI18N
        writeLine(writer, "<ExportedView Name=\"" + title + "\">"); // NOI18N
    }

    protected void writeData(TableModel model, String title, Writer writer,
                             TracerProgressObject progress) throws IOException {
        int columnsCount = model.getColumnCount();
        int rowsCount = model.getRowCount();

        writeLine(writer, "  <TableData NumRows=\"" + rowsCount + // NOI18N
                             "\" NumColumns=\"" + columnsCount + "\">"); // NOI18N

        writeLine(writer, "    <TableHeader>"); // NOI18N
        for (int c = 0; c < columnsCount; c++)
            writeLine(writer, "      <TableColumn>" + model.getColumnName(c) + "</TableColumn>"); // NOI18N
        writeLine(writer, "    </TableHeader>"); // NOI18N

        writeLine(writer, "    <TableBody>"); // NOI18N
        for (int r = 0; r < rowsCount; r++) {
            writeLine(writer, "      <TableRow>"); // NOI18N
            for (int c = 0; c < columnsCount; c++)
                writeLine(writer, "        <TableColumn>" + model.getValueAt(r, c) + "</TableColumn>"); // NOI18N
            writeLine(writer, "      </TableRow>"); // NOI18N
            
            if (progress.isFinished()) break;

            if (step == 1) {
                progress.addStep();
            } else {
                int currentStep = (int)(r * step);
                if (currentStep > lastStep) {
                    progress.addStep();
                    lastStep = currentStep;
                }
            }
        }
        writeLine(writer, "    </TableBody>"); // NOI18N

        writeLine(writer, "  </TableData>"); // NOI18N
    }

    protected void writeFooter(TableModel model, String title, Writer writer,
                               TracerProgressObject progress) throws IOException {
        writeLine(writer, "</ExportedView>"); // NOI18N
    }

}
