| /* |
| * 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 java.util.Date; |
| |
| import freemarker.template.ObjectWrapper; |
| import freemarker.template.TemplateDateModel; |
| import freemarker.template.TemplateModelException; |
| import freemarker.template.TemplateNumberModel; |
| |
| /** |
| * Utility classes for implementing {@link TemplateValueFormat}-s. |
| * |
| * @since 2.3.24 |
| */ |
| public final class TemplateFormatUtil { |
| |
| private TemplateFormatUtil() { |
| // Not meant to be instantiated |
| } |
| |
| public static void checkHasNoParameters(String params) throws InvalidFormatParametersException |
| { |
| if (params.length() != 0) { |
| throw new InvalidFormatParametersException( |
| "This number format doesn't support any parameters."); |
| } |
| } |
| |
| /** |
| * Utility method to extract the {@link Number} from an {@link TemplateNumberModel}, and throws |
| * {@link TemplateModelException} with a standard error message if that's {@code null}. {@link TemplateNumberModel} |
| * that store {@code null} are in principle not allowed, and so are considered to be bugs in the |
| * {@link ObjectWrapper} or {@link TemplateNumberModel} implementation. |
| */ |
| public static Number getNonNullNumber(TemplateNumberModel numberModel) |
| throws TemplateModelException, UnformattableValueException { |
| Number number = numberModel.getAsNumber(); |
| if (number == null) { |
| throw EvalUtil.newModelHasStoredNullException(Number.class, numberModel, null); |
| } |
| return number; |
| } |
| |
| /** |
| * Utility method to extract the {@link Date} from an {@link TemplateDateModel}, and throw |
| * {@link TemplateModelException} with a standard error message if that's {@code null}. {@link TemplateDateModel} |
| * that store {@code null} are in principle not allowed, and so are considered to be bugs in the |
| * {@link ObjectWrapper} or {@link TemplateNumberModel} implementation. |
| */ |
| public static Date getNonNullDate(TemplateDateModel dateModel) throws TemplateModelException { |
| Date date = dateModel.getAsDate(); |
| if (date == null) { |
| throw EvalUtil.newModelHasStoredNullException(Date.class, dateModel, null); |
| } |
| return date; |
| } |
| |
| } |