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PrimeFaces is one of the most popular UI libraries in Java EE Ecosystem and widely used by software companies, world renowned brands, banks, financial institutions, insurance companies, universities and more.
/**
* The MIT License
*
* Copyright (c) 2009-2019 PrimeTek
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
package org.primefaces.application.resource.barcode;
import java.awt.image.BufferedImage;
import java.io.IOException;
import java.io.OutputStream;
import java.util.HashMap;
import java.util.Map;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.faces.context.ExternalContext;
import javax.faces.context.FacesContext;
import javax.xml.XMLConstants;
import javax.xml.transform.Result;
import javax.xml.transform.Source;
import javax.xml.transform.Transformer;
import javax.xml.transform.TransformerFactory;
import org.krysalis.barcode4j.HumanReadablePlacement;
import org.krysalis.barcode4j.output.bitmap.BitmapCanvasProvider;
import org.krysalis.barcode4j.output.svg.SVGCanvasProvider;
import org.primefaces.application.resource.BaseDynamicContentHandler;
import org.primefaces.util.AgentUtils;
import org.primefaces.util.Constants;
import org.w3c.dom.DocumentFragment;
public class BarcodeHandler extends BaseDynamicContentHandler {
private static final Logger LOGGER = Logger.getLogger(BarcodeHandler.class.getName());
private final Map generators;
public BarcodeHandler() {
generators = new HashMap<>();
generators.put("int2of5", new Int2of5Generator());
generators.put("codabar", new CodabarGenerator());
generators.put("code39", new Code39Generator());
generators.put("code128", new Code128Generator());
generators.put("ean8", new EAN8Generator());
generators.put("ean13", new EAN13Generator());
generators.put("upca", new UPCAGenerator());
generators.put("upce", new UPCEGenerator());
generators.put("postnet", new PostnetGenerator());
generators.put("pdf417", new PDF417Generator());
generators.put("datamatrix", new DataMatrixGenerator());
}
@Override
public void handle(FacesContext context) throws IOException {
Map params = context.getExternalContext().getRequestParameterMap();
ExternalContext externalContext = context.getExternalContext();
String sessionKey = params.get(Constants.DYNAMIC_CONTENT_PARAM);
Map session = externalContext.getSessionMap();
Map barcodeMapping = (Map) session.get(Constants.BARCODE_MAPPING);
String value = barcodeMapping.get(sessionKey);
if (value != null) {
try {
BarcodeGenerator generator = generators.get(params.get("gen"));
String format = params.get("fmt");
String hrp = params.get("hrp");
int orientation = Integer.parseInt(params.get("ori"));
boolean cache = Boolean.parseBoolean(params.get(Constants.DYNAMIC_CONTENT_CACHE_PARAM));
generator.getBarcodeBean().setMsgPosition(HumanReadablePlacement.byName(hrp));
if (AgentUtils.isLessThanIE(context, 9)) {
format = "png";
}
OutputStream out = externalContext.getResponseOutputStream();
handleCache(externalContext, cache);
if (format.equals("png")) {
externalContext.setResponseContentType("image/png");
BitmapCanvasProvider bitmapCanvasProvider = new BitmapCanvasProvider(
out, "image/x-png", 150, BufferedImage.TYPE_BYTE_BINARY, false, orientation);
generator.generate(bitmapCanvasProvider, value);
bitmapCanvasProvider.finish();
}
else if (format.equals("svg")) {
externalContext.setResponseContentType("image/svg+xml");
SVGCanvasProvider svgCanvasProvider = new SVGCanvasProvider(false, orientation);
generator.generate(svgCanvasProvider, value);
DocumentFragment frag = svgCanvasProvider.getDOMFragment();
TransformerFactory factory = TransformerFactory.newInstance();
factory.setFeature(XMLConstants.FEATURE_SECURE_PROCESSING, true);
Transformer trans = factory.newTransformer();
Source src = new javax.xml.transform.dom.DOMSource(frag);
Result res = new javax.xml.transform.stream.StreamResult(out);
trans.transform(src, res);
}
externalContext.setResponseStatus(200);
}
catch (Exception e) {
LOGGER.log(Level.SEVERE, "Error in streaming barcode resource. {0}", new Object[]{e.getMessage()});
}
finally {
externalContext.responseFlushBuffer();
context.responseComplete();
}
}
}
}