PdfRendererWithAttributes.java

/**
 * OrbisGIS is a java GIS application dedicated to research in GIScience.
 * OrbisGIS is developed by the GIS group of the DECIDE team of the 
 * Lab-STICC CNRS laboratory, see <http://www.lab-sticc.fr/>.
 *
 * The GIS group of the DECIDE team is located at :
 *
 * Laboratoire Lab-STICC – CNRS UMR 6285
 * Equipe DECIDE
 * UNIVERSITÉ DE BRETAGNE-SUD
 * Institut Universitaire de Technologie de Vannes
 * 8, Rue Montaigne - BP 561 56017 Vannes Cedex
 * 
 * OrbisGIS is distributed under GPL 3 license.
 *
 * Copyright (C) 2007-2014 CNRS (IRSTV FR CNRS 2488)
 * Copyright (C) 2015-2017 CNRS (Lab-STICC UMR CNRS 6285)
 *
 * This file is part of OrbisGIS.
 *
 * OrbisGIS is free software: you can redistribute it and/or modify it under the
 * terms of the GNU General Public License as published by the Free Software
 * Foundation, either version 3 of the License, or (at your option) any later
 * version.
 *
 * OrbisGIS is distributed in the hope that it will be useful, but WITHOUT ANY
 * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
 * A PARTICULAR PURPOSE. See the GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License along with
 * OrbisGIS. If not, see <http://www.gnu.org/licenses/>.
 *
 * For more information, please consult: <http://www.orbisgis.org/>
 * or contact directly:
 * info_at_ orbisgis.org
 */
package org.orbisgis.core_export;

import com.itextpdf.text.pdf.PdfArray;
import com.itextpdf.text.pdf.PdfContentByte;
import com.itextpdf.text.pdf.PdfDictionary;
import com.itextpdf.text.pdf.PdfName;
import com.itextpdf.text.pdf.PdfString;
import com.itextpdf.text.pdf.PdfStructureElement;
import com.itextpdf.text.pdf.PdfTemplate;
import java.awt.Graphics2D;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.List;
import java.util.logging.Level;
import java.util.logging.Logger;
import org.orbisgis.coremap.map.MapTransform;
import org.orbisgis.coremap.renderer.Renderer;
import org.orbisgis.coremap.renderer.se.Symbolizer;
import org.h2gis.utilities.SpatialResultSetMetaData;

/**
 * This renderer is a prototype. The aim is to generate rendered-layers in a way
 * that a GeoPDF can use to offer interactivity
 * @author Maxence Laurent
 */
public class PdfRendererWithAttributes extends Renderer {

    private PdfContentByte cb;
    private PdfStructureElement top;
    private float height;
    private float width;
    private float lx;
    private float ly;
    private PdfTemplate pTemp;
    private MapTransform mt;
    private String fieldName;

    public PdfRendererWithAttributes(PdfContentByte container,
                                     PdfStructureElement top, float width,
                                     float height, float lx, float ly,
                                     String fieldName) {
        super();
        this.cb = container;
        this.top = top;
        this.height = height;
        this.width = width;
        this.lx = lx;
        this.ly = ly;
        this.fieldName = fieldName;
    }

    @Override
    protected Graphics2D getGraphics2D(Symbolizer s) {
        Graphics2D g2 = pTemp.createGraphics(width, height);
        g2.addRenderingHints(mt.getRenderingHints());
        return g2;
    }

    @Override
    protected void releaseGraphics2D(Graphics2D g2) {
        g2.dispose();
    }

    @Override
    protected void initGraphics2D(List<Symbolizer> symbs, Graphics2D g2,
                                  MapTransform mt) {
        this.mt = mt;
    }

    @Override
    public void disposeLayer(Graphics2D g2) {
    }

    @Override
    public void beginFeature(long id, ResultSet rs) {
        try {
            String attributeName;
            attributeName = rs.getString(fieldName);
            PdfStructureElement e = new PdfStructureElement(top, new PdfName(attributeName));
            PdfDictionary userProperties = new PdfDictionary();
            userProperties.put(PdfName.O, PdfName.USERPROPERTIES);
            PdfArray properties = new PdfArray();
            SpatialResultSetMetaData metaData = rs.getMetaData().unwrap(SpatialResultSetMetaData.class);

            int geometryField = metaData.getFirstGeometryFieldIndex();
            PdfDictionary property = new PdfDictionary();
            property.put(PdfName.N, new PdfString(metaData.getColumnName(geometryField)));
            property.put(PdfName.V, new PdfString(rs.getString(geometryField)));
            properties.add(property);

            userProperties.put(PdfName.P, properties);
            e.put(PdfName.A, userProperties);

            pTemp = cb.createTemplate(width, height);
            cb.beginMarkedContentSequence(e);

        } catch (SQLException ex) {
            Logger.getLogger(PdfRendererWithAttributes.class.getName()).log(Level.SEVERE, null, ex);
        }
    }

    @Override
    public void endFeature(long id, ResultSet rs) {
        cb.addTemplate(pTemp, lx, ly);
        cb.endMarkedContentSequence();
    }

    @Override
    public void beginLayer(String name) {
        //container.beginLayer(new PdfLayer(name, writer));
    }

    @Override
    public void endLayer(String name) {
        //container.endLayer();
    }
}