001/*
002 * Copyright 2002-2013 the original author or authors.
003 *
004 * Licensed under the Apache License, Version 2.0 (the "License");
005 * you may not use this file except in compliance with the License.
006 * You may obtain a copy of the License at
007 *
008 *      https://www.apache.org/licenses/LICENSE-2.0
009 *
010 * Unless required by applicable law or agreed to in writing, software
011 * distributed under the License is distributed on an "AS IS" BASIS,
012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
013 * See the License for the specific language governing permissions and
014 * limitations under the License.
015 */
016
017package org.springframework.web.servlet.theme;
018
019import javax.servlet.http.HttpServletRequest;
020import javax.servlet.http.HttpServletResponse;
021
022/**
023 * {@link org.springframework.web.servlet.ThemeResolver} implementation
024 * that simply uses a fixed theme. The fixed name can be defined via
025 * the "defaultThemeName" property; out of the box, it is "theme".
026 *
027 * <p>Note: Does not support {@code setThemeName}, as the fixed theme
028 * cannot be changed.
029 *
030 * @author Jean-Pierre Pawlak
031 * @author Juergen Hoeller
032 * @since 17.06.2003
033 * @see #setDefaultThemeName
034 */
035public class FixedThemeResolver extends AbstractThemeResolver {
036
037        @Override
038        public String resolveThemeName(HttpServletRequest request) {
039                return getDefaultThemeName();
040        }
041
042        @Override
043        public void setThemeName(HttpServletRequest request, HttpServletResponse response, String themeName) {
044                throw new UnsupportedOperationException("Cannot change theme - use a different theme resolution strategy");
045        }
046
047}