| // *************************************************************************************************************************** |
| // * 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 org.apache.juneau.svl; |
| |
| import java.io.*; |
| |
| /** |
| * Abstract superclass of all Simple Var Language variables that resolve to simple returned string values. |
| * |
| * <p> |
| * Note the difference between this class and {@link StreamedVar} that streams values to writers. |
| * <br>Unlike the {@link StreamedVar} class, the returned value from this class can contain nested variables that will be |
| * recursively resolved by {@link VarResolver}. |
| * |
| * <p> |
| * Subclasses must implement the following method: |
| * <ul class='javatree'> |
| * <li class='jm'>{@link #resolve(VarResolverSession, String)} |
| * </ul> |
| * |
| * <ul class='seealso'> |
| * <li class='link'>{@doc juneau-marshall.SimpleVariableLanguage.SvlVariables} |
| * </ul> |
| */ |
| public abstract class SimpleVar extends Var { |
| |
| /** |
| * Constructor. |
| * |
| * @param name The variable name (e.g. <js>"C"</js> for variables of the form <js>"$C{...}"</js>) |
| */ |
| protected SimpleVar(String name) { |
| super(name, false); |
| } |
| |
| @Override /* Var */ |
| public void resolveTo(VarResolverSession session, Writer w, String arg) throws Exception { |
| throw new UnsupportedOperationException("Cannot call streamTo() on SimpleVar class"); |
| } |
| } |