| /* |
| * 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; |
| |
| import java.io.Serializable; |
| |
| /** |
| * A simple implementation of the <tt>TemplateScalarModel</tt> |
| * interface, using a <tt>String</tt>. |
| * As of version 2.0 this object is immutable. |
| * |
| * <p>This class is thread-safe. |
| * |
| * @see SimpleSequence |
| * @see SimpleHash |
| */ |
| public final class SimpleScalar |
| implements TemplateScalarModel, Serializable { |
| |
| /** |
| * @serial the value of this <tt>SimpleScalar</tt> if it wraps a |
| * <tt>String</tt>. |
| */ |
| private final String value; |
| |
| /** |
| * Constructs a <tt>SimpleScalar</tt> containing a string value. |
| * @param value the string value. If this is {@code null}, its value in FTL will be {@code ""}. |
| */ |
| public SimpleScalar(String value) { |
| this.value = value; |
| } |
| |
| public String getAsString() { |
| return (value == null) ? "" : value; |
| } |
| |
| @Override |
| public String toString() { |
| // [2.4] Shouldn't return null |
| return value; |
| } |
| |
| /** |
| * Same as calling the constructor, except that for a {@code null} parameter it returns null. |
| * |
| * @since 2.3.23 |
| */ |
| public static SimpleScalar newInstanceOrNull(String s) { |
| return s != null ? new SimpleScalar(s) : null; |
| } |
| |
| } |