org.primefaces.application.resource.barcode.BarcodeHandler Maven / Gradle / Ivy
/*
* Copyright 2009-2014 PrimeTek.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
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.transform.Result;
import javax.xml.transform.Source;
import javax.xml.transform.Transformer;
import javax.xml.transform.TransformerFactory;
import org.krysalis.barcode4j.output.bitmap.BitmapCanvasProvider;
import org.krysalis.barcode4j.output.svg.SVGCanvasProvider;
import org.primefaces.application.resource.BaseDynamicContentHandler;
import org.primefaces.context.RequestContext;
import org.primefaces.util.AgentUtils;
import org.primefaces.util.Constants;
import org.primefaces.util.StringEncrypter;
import org.w3c.dom.DocumentFragment;
public class BarcodeHandler extends BaseDynamicContentHandler {
private final static 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());
}
public void handle(FacesContext context) throws IOException {
Map params = context.getExternalContext().getRequestParameterMap();
ExternalContext externalContext = context.getExternalContext();
String encryptedValue = (String) params.get(Constants.DYNAMIC_CONTENT_PARAM);
if(encryptedValue != null) {
try {
BarcodeGenerator generator = generators.get(params.get("gen"));
String format = params.get("fmt");
int orientation = Integer.parseInt(params.get("ori"));
boolean cache = Boolean.valueOf(params.get(Constants.DYNAMIC_CONTENT_CACHE_PARAM));
StringEncrypter strEn = RequestContext.getCurrentInstance().getEncrypter();
String value = strEn.decrypt(encryptedValue);
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();
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();
}
}
}
}