| /* |
| * $Id$ |
| * |
| * 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.tiles.request.render; |
| |
| import java.io.BufferedReader; |
| import java.io.IOException; |
| import java.io.InputStream; |
| import java.io.InputStreamReader; |
| import java.util.List; |
| import java.util.regex.Matcher; |
| import java.util.regex.Pattern; |
| |
| import com.sampullara.mustache.MustacheBuilder; |
| import com.sampullara.mustache.MustacheException; |
| import com.sampullara.mustache.Scope; |
| import org.apache.tiles.request.ApplicationContext; |
| import org.apache.tiles.request.ApplicationResource; |
| import org.apache.tiles.request.Request; |
| |
| /** |
| * The Mustache-specific renderer. |
| * |
| * @version $Rev: 1215006 $ $Date: 2011-12-16 01:30:41 +0100 (Fri, 16 Dec 2011) $ |
| * @since 3.0 |
| */ |
| public final class MustacheRenderer implements Renderer { |
| |
| private Pattern acceptPattern; |
| |
| @Override |
| public void render(String path, Request request) throws IOException { |
| if (path == null) { |
| throw new CannotRenderException("Cannot dispatch a null path"); |
| } |
| |
| try{ |
| new MustacheBuilder() |
| .build(new BufferedReader(new InputStreamReader(getResourceStream(request, path))), path) |
| .execute(request.getWriter(), buildScope(request)); |
| |
| }catch(MustacheException ex){ |
| throw new IOException("failed to MustacheRenderer.render(" + path + ",request)", ex); |
| } |
| } |
| |
| private static InputStream getResourceStream(Request request, String path) throws IOException { |
| final ApplicationContext applicationContext = request.getApplicationContext(); |
| final ApplicationResource resource = applicationContext.getResource(path); |
| return resource.getInputStream(); |
| } |
| |
| private static Scope buildScope(Request request){ |
| Scope scope = null; |
| List<String> availableScopes = request.getAvailableScopes(); |
| for(int i = availableScopes.size() -1; i >= 0; --i){ |
| scope = null == scope |
| ? new Scope(request.getContext(availableScopes.get(i))) |
| : new Scope(request.getContext(availableScopes.get(i)), scope); |
| } |
| return scope; |
| } |
| |
| //@Override |
| public boolean isRenderable(String path, Request request) { |
| if (path == null) { |
| return false; |
| } |
| if (acceptPattern != null) { |
| final Matcher matcher = acceptPattern.matcher(path); |
| return matcher.matches(); |
| } |
| return true; |
| } |
| |
| public void setAcceptPattern(Pattern acceptPattern) { |
| this.acceptPattern = acceptPattern; |
| } |
| } |