package freemarker.core;
import freemarker.template.TemplateException;
import freemarker.template.TemplateHashModelEx;
import freemarker.template.TemplateModel;
import freemarker.template.TemplateModelException;
abstract class BuiltInForHashEx extends BuiltIn {
@Override
TemplateModel _eval(Environment env) throws TemplateException {
TemplateModel model = target.eval(env);
if (model instanceof TemplateHashModelEx) {
return calculateResult((TemplateHashModelEx) model, env);
}
throw new NonExtendedHashException(target, model, env);
}
abstract TemplateModel calculateResult(TemplateHashModelEx hashExModel, Environment env)
throws TemplateModelException, InvalidReferenceException;
protected InvalidReferenceException newNullPropertyException(
String propertyName, TemplateModel tm, Environment env) {
if (env.getFastInvalidReferenceExceptions()) {
return InvalidReferenceException.FAST_INSTANCE;
} else {
return new InvalidReferenceException(
new _ErrorDescriptionBuilder(
"The exteneded hash (of class ", tm.getClass().getName(), ") has returned null for its \"",
propertyName,
"\" property. This is maybe a bug. The extended hash was returned by this expression:")
.blame(target),
env, this);
}
}
}