static {
ServiceLoader<Engine> ldr = ServiceLoader.load(Engine.class);
String tmpDefaultEngineExtension = null;
for (Engine engine : ldr) {
ENGINE.put(engine.getExtension(), engine);
tmpDefaultEngineExtension = engine.getExtension();
}
if (ENGINE.size() == 1) {
DEFAULT_ENGINE = tmpDefaultEngineExtension;
} else {
DEFAULT_ENGINE = null;
}
}
@Override
public void render(@NotNull final String template) {
int sep = template.lastIndexOf('.');
if (sep != -1) {
String extension = template.substring(sep);
final Engine renderEngine = ENGINE.get(extension);
if (renderEngine == null) {
ctx.fail("No engine registered for extension: " + extension);
} else {
renderEngine.render(template, ctx);
}
} else {
// when no extension is provided but only 1 engine is available assume that one
if (DEFAULT_ENGINE != null) {
final Engine renderEngine = ENGINE.get(DEFAULT_ENGINE);
renderEngine.render(template, ctx);
} else {
ctx.fail("Cannot determine the extension of the template");
}
}
}