| /* |
| * 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.manual; |
| |
| import java.util.Locale; |
| |
| import freemarker.core.Environment; |
| import freemarker.core.TemplateNumberFormat; |
| import freemarker.core.TemplateNumberFormatFactory; |
| import freemarker.core.TemplateValueFormatException; |
| import freemarker.template.TemplateModelException; |
| import freemarker.template.TemplateNumberModel; |
| |
| /** |
| * A number format that takes any other number format as parameter (specified as a string, as |
| * usual in FreeMarker), then if the model is a {@link UnitAwareTemplateNumberModel}, it shows |
| * the unit after the number formatted with the other format, otherwise it just shows the formatted |
| * number without unit. |
| */ |
| public class UnitAwareTemplateNumberFormatFactory extends TemplateNumberFormatFactory { |
| |
| public static final UnitAwareTemplateNumberFormatFactory INSTANCE |
| = new UnitAwareTemplateNumberFormatFactory(); |
| |
| private UnitAwareTemplateNumberFormatFactory() { |
| // Defined to decrease visibility |
| } |
| |
| @Override |
| public TemplateNumberFormat get(String params, Locale locale, Environment env) |
| throws TemplateValueFormatException { |
| return new UnitAwareNumberFormat(env.getTemplateNumberFormat(params, locale)); |
| } |
| |
| private static class UnitAwareNumberFormat extends TemplateNumberFormat { |
| |
| private final TemplateNumberFormat innerFormat; |
| |
| private UnitAwareNumberFormat(TemplateNumberFormat innerFormat) { |
| this.innerFormat = innerFormat; |
| } |
| |
| @Override |
| public String formatToPlainText(TemplateNumberModel numberModel) |
| throws TemplateModelException, TemplateValueFormatException { |
| String innerResult = innerFormat.formatToPlainText(numberModel); |
| return numberModel instanceof UnitAwareTemplateNumberModel |
| ? innerResult + " " + ((UnitAwareTemplateNumberModel) numberModel).getUnit() |
| : innerResult; |
| } |
| |
| @Override |
| public boolean isLocaleBound() { |
| return innerFormat.isLocaleBound(); |
| } |
| |
| @Override |
| public String getDescription() { |
| return "unit-aware " + innerFormat.getDescription(); |
| } |
| |
| } |
| |
| } |