| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you 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 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); |
| } |
| } |
| |
| } |