Java tutorial
/** * LabelEncoder.java * edu.harvard.mcz.imagecapture.encoder * Copyright 2009 President and Fellows of Harvard College * * This program is free software: you can redistribute it and/or modify * it under the terms of Version 2 of the GNU General Public License * as published by the Free Software Foundation. * * 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, see <http://www.gnu.org/licenses/>. * * Author: Paul J. Morris */ package edu.harvard.mcz.imagecapture.encoder; import java.awt.Color; import java.awt.image.BufferedImage; import java.io.FileNotFoundException; import java.io.FileOutputStream; import java.io.IOException; import java.util.ArrayList; import java.util.Hashtable; import java.util.Iterator; import java.util.List; import org.apache.commons.logging.Log; import org.apache.commons.logging.LogFactory; import com.google.zxing.BarcodeFormat; import com.google.zxing.EncodeHintType; import com.google.zxing.WriterException; import com.google.zxing.client.j2se.MatrixToImageWriter; import com.google.zxing.common.BitMatrix; import com.google.zxing.qrcode.QRCodeWriter; import com.google.zxing.qrcode.decoder.ErrorCorrectionLevel; import com.lowagie.text.BadElementException; import com.lowagie.text.Chunk; import com.lowagie.text.Document; import com.lowagie.text.DocumentException; import com.lowagie.text.Font; import com.lowagie.text.Image; import com.lowagie.text.PageSize; import com.lowagie.text.Paragraph; import com.lowagie.text.pdf.PdfPCell; import com.lowagie.text.pdf.PdfPTable; import com.lowagie.text.pdf.PdfWriter; import edu.harvard.mcz.imagecapture.data.UnitTrayLabel; import edu.harvard.mcz.imagecapture.data.UnitTrayLabelLifeCycle; import edu.harvard.mcz.imagecapture.exceptions.PrintFailedException; import edu.harvard.mcz.imagecapture.exceptions.SaveFailedException; /** LabelEncoder * * @author Paul J. Morris * */ public class LabelEncoder { private static final Log log = LogFactory.getLog(LabelEncoder.class); private UnitTrayLabel label; public LabelEncoder(UnitTrayLabel aLabel) { label = aLabel; } private BitMatrix getQRCodeMatrix() { BitMatrix result = null; QRCodeWriter writer = new QRCodeWriter(); try { String data = label.toJSONString(); Hashtable<EncodeHintType, ErrorCorrectionLevel> hints = new Hashtable<EncodeHintType, ErrorCorrectionLevel>(); // set ErrorCorrectionLevel here hints.put(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.H); result = writer.encode(data, BarcodeFormat.QR_CODE, 200, 200, hints); } catch (WriterException e) { // TODO Auto-generated catch block e.printStackTrace(); } return result; } public Image getImage() { BitMatrix barcode = getQRCodeMatrix(); BufferedImage bufferedImage = MatrixToImageWriter.toBufferedImage(barcode); // ZXing now has MatrixToImageWriter to avoid looping through byte arrays. // byte[][] bca = barcode.getArray(); // byte[] data = new byte[200*4*200*4]; // int z=0; // for (int x=0; x<200; x++) { // for (int y=0; y<200; y++) { // data[z++] = bca[x][y]; // } // } // Image image = null; // try { // image = Image.getInstance(200, 200, 1, 8, data); // image.scalePercent(50f); // } catch (BadElementException e) { // // TODO Auto-generated catch block // e.printStackTrace(); // } // data = null; Image image = null; try { image = Image.getInstance(bufferedImage, null); } catch (BadElementException e) { // TODO Auto-generated catch block e.printStackTrace(); } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); } return image; } @SuppressWarnings("hiding") public static boolean printList(List<UnitTrayLabel> taxa) throws PrintFailedException { boolean result = false; UnitTrayLabel label = new UnitTrayLabel(); LabelEncoder encoder = new LabelEncoder(label); Image image = encoder.getImage(); int counter = 0; try { Document document = new Document(); PdfWriter.getInstance(document, new FileOutputStream("labels.pdf")); document.setPageSize(PageSize.LETTER); document.open(); PdfPTable table = new PdfPTable(4); table.setWidthPercentage(100f); //table.setHorizontalAlignment(PdfPTable.ALIGN_LEFT); float[] cellWidths = { 30f, 20f, 30f, 20f }; table.setWidths(cellWidths); UnitTrayLabelLifeCycle uls = new UnitTrayLabelLifeCycle(); if (taxa == null) { taxa = uls.findAll(); } Iterator<UnitTrayLabel> i = taxa.iterator(); PdfPCell cell = null; PdfPCell cell_barcode = null; // Create two lists of 12 cells, the first 6 of each representing // the left hand column of 6 labels, the second 6 of each // representing the right hand column. // cells holds the text for each label, cells_barcode the barcode. ArrayList<PdfPCell> cells = new ArrayList<PdfPCell>(12); ArrayList<PdfPCell> cells_barcode = new ArrayList<PdfPCell>(12); for (int x = 0; x < 12; x++) { cells.add(null); cells_barcode.add(null); } int cellCounter = 0; while (i.hasNext()) { // Loop through all of the taxa (unit tray labels) found to print label = i.next(); for (int toPrint = 0; toPrint < label.getNumberToPrint(); toPrint++) { // For each taxon, loop through the number of requested copies // Generate a text and a barcode cell for each, and add to array for page log.debug("Label " + toPrint + " of " + label.getNumberToPrint()); cell = new PdfPCell(); cell.setBorderColor(Color.LIGHT_GRAY); cell.setVerticalAlignment(PdfPCell.ALIGN_TOP); cell.disableBorderSide(PdfPCell.RIGHT); cell.setPaddingLeft(3); String higherNames = ""; if (label.getTribe().trim().length() > 0) { higherNames = label.getFamily() + ": " + label.getSubfamily() + ": " + label.getTribe(); } else { higherNames = label.getFamily() + ": " + label.getSubfamily(); } Paragraph higher = new Paragraph(); higher.setFont(new Font(Font.TIMES_ROMAN, 11, Font.NORMAL)); higher.add(new Chunk(higherNames)); cell.addElement(higher); Paragraph name = new Paragraph(); Chunk genus = new Chunk(label.getGenus().trim() + " "); genus.setFont(new Font(Font.TIMES_ROMAN, 11, Font.ITALIC)); Chunk species = new Chunk(label.getSpecificEpithet().trim()); Chunk normal = null; // normal font prefix to preceed specific epithet (nr. <i>epithet</i>) if (label.getSpecificEpithet().contains(".") || label.getSpecificEpithet().contains("[")) { if (label.getSpecificEpithet().startsWith("nr. ")) { normal = new Chunk("nr. "); normal.setFont(new Font(Font.TIMES_ROMAN, 11, Font.NORMAL)); species = new Chunk(label.getSpecificEpithet().trim().substring(4)); species.setFont(new Font(Font.TIMES_ROMAN, 11, Font.ITALIC)); } else { species.setFont(new Font(Font.TIMES_ROMAN, 11, Font.NORMAL)); } } else { species.setFont(new Font(Font.TIMES_ROMAN, 11, Font.ITALIC)); } String s = ""; if (label.getSubspecificEpithet().trim().length() > 0) { s = " "; } else { s = ""; } Chunk subspecies = new Chunk(s + label.getSubspecificEpithet().trim()); if (label.getSubspecificEpithet().contains(".") || label.getSubspecificEpithet().contains("[")) { subspecies.setFont(new Font(Font.TIMES_ROMAN, 11, Font.NORMAL)); } else { subspecies.setFont(new Font(Font.TIMES_ROMAN, 11, Font.ITALIC)); } if (label.getInfraspecificRank().trim().length() > 0) { s = " "; } else { s = ""; } Chunk infraRank = new Chunk(s + label.getInfraspecificRank().trim()); infraRank.setFont(new Font(Font.TIMES_ROMAN, 11, Font.NORMAL)); if (label.getInfraspecificEpithet().trim().length() > 0) { s = " "; } else { s = ""; } Chunk infra = new Chunk(s + label.getInfraspecificEpithet().trim()); infra.setFont(new Font(Font.TIMES_ROMAN, 11, Font.ITALIC)); if (label.getUnNamedForm().trim().length() > 0) { s = " "; } else { s = ""; } Chunk unNamed = new Chunk(s + label.getUnNamedForm().trim()); unNamed.setFont(new Font(Font.TIMES_ROMAN, 11, Font.NORMAL)); name.add(genus); if (normal != null) { name.add(normal); } name.add(species); name.add(subspecies); name.add(infraRank); name.add(infra); name.add(unNamed); cell.addElement(name); Paragraph authorship = new Paragraph(); authorship.setFont(new Font(Font.TIMES_ROMAN, 10, Font.NORMAL)); if (label.getAuthorship() != null && label.getAuthorship().length() > 0) { Chunk c_authorship = new Chunk(label.getAuthorship()); authorship.add(c_authorship); } cell.addElement(authorship); //cell.addElement(new Paragraph(" ")); if (label.getDrawerNumber() != null && label.getDrawerNumber().length() > 0) { Paragraph drawerNumber = new Paragraph(); drawerNumber.setFont(new Font(Font.TIMES_ROMAN, 10, Font.NORMAL)); Chunk c_drawerNumber = new Chunk(label.getDrawerNumber()); drawerNumber.add(c_drawerNumber); cell.addElement(drawerNumber); } else { if (label.getCollection() != null && label.getCollection().length() > 0) { Paragraph collection = new Paragraph(); collection.setFont(new Font(Font.TIMES_ROMAN, 10, Font.NORMAL)); Chunk c_collection = new Chunk(label.getCollection()); collection.add(c_collection); cell.addElement(collection); } } cell_barcode = new PdfPCell(); cell_barcode.setBorderColor(Color.LIGHT_GRAY); cell_barcode.disableBorderSide(PdfPCell.LEFT); cell_barcode.setVerticalAlignment(PdfPCell.ALIGN_TOP); encoder = new LabelEncoder(label); image = encoder.getImage(); image.setAlignment(Image.ALIGN_TOP); cell_barcode.addElement(image); cells.add(cellCounter, cell); cells_barcode.add(cellCounter, cell_barcode); cellCounter++; // If we have hit a full set of 12 labels, add them to the document // in two columns, filling left column first, then right if (cellCounter == 12) { // add a page of 12 cells in columns of two. for (int x = 0; x < 6; x++) { if (cells.get(x) == null) { PdfPCell c = new PdfPCell(); c.setBorder(0); table.addCell(c); table.addCell(c); } else { table.addCell(cells.get(x)); table.addCell(cells_barcode.get(x)); } if (cells.get(x + 6) == null) { PdfPCell c = new PdfPCell(); c.setBorder(0); table.addCell(c); table.addCell(c); } else { table.addCell(cells.get(x + 6)); table.addCell(cells_barcode.get(x + 6)); } } // Reset to begin next page cellCounter = 0; document.add(table); table = new PdfPTable(4); table.setWidthPercentage(100f); table.setWidths(cellWidths); for (int x = 0; x < 12; x++) { cells.set(x, null); cells_barcode.set(x, null); } } } // end loop through toPrint (for a taxon) counter++; } // end while results has next (for all taxa requested) // get any remaining cells in pairs for (int x = 0; x < 6; x++) { if (cells.get(x) == null) { PdfPCell c = new PdfPCell(); c.setBorder(0); table.addCell(c); table.addCell(c); } else { table.addCell(cells.get(x)); table.addCell(cells_barcode.get(x)); } if (cells.get(x + 6) == null) { PdfPCell c = new PdfPCell(); c.setBorder(0); table.addCell(c); table.addCell(c); } else { table.addCell(cells.get(x + 6)); table.addCell(cells_barcode.get(x + 6)); } } // add any remaining cells document.add(table); try { document.close(); } catch (Exception e) { throw new PrintFailedException("No labels to print." + e.getMessage()); } // Check to see if there was content in the document. if (counter == 0) { result = false; } else { // Printed to pdf ok. result = true; // Increment number printed. i = taxa.iterator(); while (i.hasNext()) { label = i.next(); for (int toPrint = 0; toPrint < label.getNumberToPrint(); toPrint++) { label.setPrinted(label.getPrinted() + 1); } label.setNumberToPrint(0); try { uls.attachDirty(label); } catch (SaveFailedException e) { // TODO Auto-generated catch block e.printStackTrace(); } } } } catch (FileNotFoundException e) { // TODO Auto-generated catch block e.printStackTrace(); throw new PrintFailedException("File not found."); } catch (DocumentException e) { // TODO Auto-generated catch block e.printStackTrace(); throw new PrintFailedException("Error buiding PDF document."); } catch (OutOfMemoryError e) { System.out.println("Out of memory error. " + e.getMessage()); System.out.println("Failed. Too many labels."); throw new PrintFailedException("Ran out of memory, too many labels at once."); } return result; } public static void main(String[] args) { try { UnitTrayLabelLifeCycle uls = new UnitTrayLabelLifeCycle(); List<UnitTrayLabel> taxa = uls.findAll(); boolean ok = LabelEncoder.printList(taxa); } catch (PrintFailedException e) { System.out.println("Failed to print all. " + e.getMessage()); } System.out.println("Done."); } }