@Override
public Object exec(List arguments) throws TemplateModelException {
if (arguments.size() != 2) {
throw new TemplateModelException("getCharactersByGroup needs two arguments - page and group");
}
try {
Page page = (Page) DeepUnwrap.unwrap((TemplateModel) arguments.get(0));
TemplateScalarModel groupScalar = (TemplateScalarModel) arguments.get(1);
return objectWrapper.wrap(getCharactersByGroup(page, groupScalar.getAsString()));
} catch (ClassCastException e) {
throw new TemplateModelException("Error: Expecting Page and String arguments");
}
}
static String getString(TemplateScalarModel model, Expression expr, Environment env)
throws TemplateException {
String value = model.getAsString();
if (value == null) {
if (env.isClassicCompatible()) {
return "";
} else {
throw new TemplateException(expr + " evaluated to null string.", env);
}
}
return value;
}
