| /* |
| * 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.template; |
| |
| |
| /** |
| * "boolean" template language data type; same as in Java; either {@code true} or {@code false}. |
| * |
| * <p> |
| * Objects of this type should be immutable, that is, calling {@link #getAsBoolean()} should always return the same |
| * value as for the first time. |
| */ |
| public interface TemplateBooleanModel extends TemplateModel { |
| |
| /** |
| * @return whether to interpret this object as true or false in a boolean context |
| */ |
| boolean getAsBoolean() throws TemplateModelException; |
| |
| /** |
| * A singleton object to represent boolean false |
| */ |
| TemplateBooleanModel FALSE = new FalseTemplateBooleanModel(); |
| |
| /** |
| * A singleton object to represent boolean true |
| */ |
| TemplateBooleanModel TRUE = new TrueTemplateBooleanModel(); |
| |
| } |