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copied!<p>Unfortunately there is no generic solution here, yet. But instrumenting ResourceHandler you can implement this an official way (since JSF 2):</p> <pre><code>public class TestResourceHandler extends ResourceHandlerWrapper { public static final class TestResource extends Resource { @Override public InputStream getInputStream() throws IOException { return null; } @Override public Map<String, String> getResponseHeaders() { return new HashMap<>(); } @Override public String getRequestPath() { FacesContext context = FacesContext.getCurrentInstance(); return context.getApplication().getViewHandler().getResourceURL( context, "/faces" + RESOURCE_IDENTIFIER + "/test.gif?ln=test"); } @Override public URL getURL() { return null; } @Override public boolean userAgentNeedsUpdate(FacesContext context) { return true; } } private ResourceHandler wrapped; public TestResourceHandler(ResourceHandler wrapped) { this.wrapped = wrapped; } @Override public ResourceHandler getWrapped() { return wrapped; } @Override public Resource createResource(String resourceName, String libraryName) { if ("test".equals(libraryName)) return new TestResource(); return super.createResource(resourceName, libraryName); } @Override public boolean libraryExists(String libraryName) { if ("test".equals(libraryName)) return true; return super.libraryExists(libraryName); } @Override public void handleResourceRequest(FacesContext context) throws IOException { String library = context.getExternalContext().getRequestParameterMap().get("ln"); if ("test".equals(library)) { BufferedImage image = ImageIO.read(getClass().getResource("/info.png")); context.getExternalContext().setResponseContentType("image/gif"); ImageIO.write(image, "gif", context.getExternalContext().getResponseOutputStream()); context.responseComplete(); } else { wrapped.handleResourceRequest(context); } } } </code></pre> <p>And registered in the faces-config.xml:</p> <pre><code><faces-config> <application> ... <resource-handler>com.intersult.test.util.TestResourceHandler</resource-handler> </application> ... </faces-config> </code></pre> <p>Access the resource via /faces/javax.faces.resource/test.gif?ln=test or </p> <p>This solution works both in the application itself and in any JSF-library included in the base application WAR.</p>

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