/*
* 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;
import java.io.IOException;
import java.util.HashMap;
import java.util.Map;
import javax.faces.application.Resource;
import javax.faces.application.ResourceHandler;
import javax.faces.application.ResourceHandlerWrapper;
import javax.faces.context.FacesContext;
import org.primefaces.application.resource.barcode.BarcodeHandler;
import org.primefaces.util.Constants;
public class PrimeResourceHandler extends ResourceHandlerWrapper {
private final Map<String,DynamicContentHandler> handlers;
private final ResourceHandler wrapped;
public PrimeResourceHandler(ResourceHandler wrapped) {
this.wrapped = wrapped;
handlers = new HashMap<String,DynamicContentHandler>();
handlers.put("sc", new StreamedContentHandler());
if(isBarcodeHandlerAvailable()) {
handlers.put("barcode", new BarcodeHandler());
}
if(isQRCodeHandlerAvailable()) {
handlers.put("qr", new QRCodeHandler());
}
}
@Override
public ResourceHandler getWrapped() {
return this.wrapped;
}
@Override
public Resource createResource(String resourceName, String libraryName) {
Resource resource = super.createResource(resourceName, libraryName);
if(resource != null && libraryName != null && libraryName.equalsIgnoreCase(Constants.LIBRARY)) {
return new PrimeResource(resource);
}
else {
return resource;
}
}
@Override
public void handleResourceRequest(FacesContext context) throws IOException {
Map<String,String> params = context.getExternalContext().getRequestParameterMap();
String handlerType = params.get(Constants.DYNAMIC_CONTENT_TYPE_PARAM);
DynamicContentHandler handler = handlers.get(handlerType);
if(handler != null) {
handler.handle(context);
} else {
super.handleResourceRequest(context);
}
}
private boolean isBarcodeHandlerAvailable() {
try {
Class.forName("org.krysalis.barcode4j.output.AbstractCanvasProvider");
return true;
}
catch (ClassNotFoundException ex) {
return false;
}
}
private boolean isQRCodeHandlerAvailable() {
try {
Class.forName("net.glxn.qrgen.QRCode");
return true;
}
catch (ClassNotFoundException ex) {
return false;
}
}
}