org.posterita.core.PDFReportGenerator.java Source code

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Here is the source code for org.posterita.core.PDFReportGenerator.java

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/**
 *  Product: Posterita Web-Based POS and Adempiere Plugin
 *  Copyright (C) 2007  Posterita Ltd
 *  This file is part of POSterita
 *  
 *  POSterita 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 2 of the License, or
 *  (at your option) any later version.
 *
 *  This program 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 this program; if not, write to the Free Software Foundation, Inc.,
 *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 * Created on Mar 1, 2006 by praveen
 *
 */
package org.posterita.core;

import java.awt.Color;
import java.io.FileOutputStream;
import java.util.ArrayList;
import java.util.Properties;

import org.posterita.exceptions.OperationException;
import org.posterita.lib.PropertiesConstant;
import com.lowagie.text.Chunk;
import com.lowagie.text.Document;
import com.lowagie.text.Element;
import com.lowagie.text.Font;
import com.lowagie.text.FontFactory;
import com.lowagie.text.Image;
import com.lowagie.text.PageSize;
import com.lowagie.text.Paragraph;
import com.lowagie.text.Rectangle;
import com.lowagie.text.pdf.BaseFont;
import com.lowagie.text.pdf.PdfTemplate;
import com.lowagie.text.pdf.PdfWriter;

public abstract class PDFReportGenerator {
    protected float CELLPADDING = 4;
    protected float MARGIN = 30f;

    //setting default fonts
    protected Font TITLE_FONT = FontFactory.getFont(FontFactory.HELVETICA, 18, Font.BOLD, new Color(255, 0, 0));
    protected Font SUBTITLE_FONT = FontFactory.getFont(FontFactory.HELVETICA, 15, Font.BOLD, new Color(255, 0, 0));
    protected Font HEADER_FONT = FontFactory.getFont(FontFactory.HELVETICA, 10, Font.BOLD);
    protected Font DATA_FONT = FontFactory.getFont(FontFactory.HELVETICA, 10);

    //setting default pagesize
    protected Rectangle PAGE_SIZE = PageSize.A4.rotate();

    protected Image getTextAsImage(String text) throws OperationException {
        try {
            PdfTemplate template = writer.getDirectContent().createTemplate(20, 20);
            //BaseFont bf = BaseFont.createFont("Helvetica", "winansi", false); 
            BaseFont bf = HEADER_FONT.getBaseFont();
            float size = 10;
            float width = bf.getWidthPoint(text, size);
            template.beginText();
            //template.setRGBColorFillF(1, 1, 1);
            template.setFontAndSize(bf, size);
            template.setTextMatrix(0, 2);
            template.showText(text);
            template.endText();
            template.setWidth(width);
            template.setHeight(size + 2);
            // make an Image object from the template
            Image img = Image.getInstance(template);
            img.setAlignment(Image.RIGHT | Image.TEXTWRAP);

            return img;

        } catch (Exception e) {
            throw new OperationException(e);
        }
    }

    public String getPDFReport(Properties ctx, ArrayList dataSource) throws OperationException {
        String filename = RandomStringGenerator.randomstring() + ".pdf";
        String dir = UDIFilePropertiesManager.getProperty().get(ctx, PropertiesConstant.UDI_HOME)
                + "/config/reports/pdf/";
        String filepath = dir + filename;

        //Generatting report

        //Initialising the datasource
        this.dataSource = dataSource;

        if (dataSource == null)
            throw new OperationException("Cannot generate report! Cause: empty datasource");

        Rectangle dimension = getDocumentDimension();
        Document document = new Document(dimension, MARGIN, MARGIN, MARGIN, MARGIN);

        try {
            writer = PdfWriter.getInstance(document, new FileOutputStream(filepath));
            writer.setPageEvent(new PDFReportPageEventHelper());

            document.open();

            //Add the title part
            Paragraph title = new Paragraph();
            Paragraph subTitle = new Paragraph();

            if (reportTitle != null) {
                title.add(new Chunk(reportTitle, TITLE_FONT));
                title.setAlignment(Element.ALIGN_CENTER);
                document.add(title);
            }

            if (reportSubTitle != null) {
                subTitle.add(new Chunk(reportSubTitle, SUBTITLE_FONT));
                subTitle.setAlignment(Element.ALIGN_CENTER);
                document.add(subTitle);
            }

            if ((reportSubTitle != null) || (reportTitle != null)) {
                document.add(new Paragraph(" "));
            }

            writeDocument(document);

            document.close();
            writer.close();

            return "config/report/pdf/" + filename;
        } catch (Exception e) {
            throw new OperationException(e);
        }

    }

    public String getReportSubTitle() {
        return reportSubTitle;
    }

    public void setReportSubTitle(String reportSubTitle) {
        this.reportSubTitle = reportSubTitle;
    }

    public String getReportTitle() {
        return reportTitle;
    }

    public void setReportTitle(String reportTitle) {
        this.reportTitle = reportTitle;
    }

    protected abstract void writeDocument(Document document) throws OperationException;

    protected abstract Rectangle getDocumentDimension();

    protected ArrayList dataSource = null;
    protected PdfWriter writer = null;
    private String reportTitle = null;
    private String reportSubTitle = null;

}