Tilman
106 lines
3.4 KiB
Java
106 lines
3.4 KiB
Java
/* Copyright (c) 2006 Google Inc.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package sample.gbase.recipe;
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import com.google.api.gbase.client.FeedURLFactory;
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import com.google.api.gbase.client.GoogleBaseEntry;
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import com.google.api.gbase.client.GoogleBaseService;
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import com.google.gdata.util.ServiceException;
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import java.io.IOException;
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import java.net.URL;
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import javax.servlet.ServletConfig;
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import javax.servlet.ServletContext;
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import javax.servlet.ServletException;
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import javax.servlet.http.HttpServlet;
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import javax.servlet.http.HttpServletRequest;
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import javax.servlet.http.HttpServletResponse;
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/**
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* Displays a recipe.
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*/
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@SuppressWarnings("serial")
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public class RecipeDisplayServlet extends HttpServlet {
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public static final String DISPLAY_JSP = "/WEB-INF/recipeDisplay.jsp";
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protected FeedURLFactory urlFactory;
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@Override
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public void init(ServletConfig servletConfig) throws ServletException {
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super.init(servletConfig);
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ServletContext context = servletConfig.getServletContext();
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urlFactory = (FeedURLFactory)
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context.getAttribute(RecipeListener.FEED_URL_FACTORY_ATTRIBUTE);
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}
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@Override
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public void destroy() {
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super.destroy();
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}
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/**
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* Shows the page for displaying a Recipe.
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*
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* @param request
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* @param response
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* @throws ServletException
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* @throws IOException
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*/
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@Override
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protected void doGet(HttpServletRequest request,
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HttpServletResponse response)
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throws ServletException, IOException {
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// This is a public page, so we use a simple, nonauthenticated service
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GoogleBaseService service = RecipeUtil.getGoogleBaseService(request,
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this.getServletContext());
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String id = request.getParameter(RecipeUtil.ID_PARAMETER);
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recipeDisplay(request, response, service, id);
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}
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/**
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* Retrieves a recipe and forwards the request
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* to the {@link #DISPLAY_JSP} jsp page that displays the recipe.
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*
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* @param request
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* @param response
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* @param service the service used to retrieve the recipe
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* @param id the id of the recipe
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*/
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private void recipeDisplay(HttpServletRequest request,
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HttpServletResponse response,
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GoogleBaseService service,
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String id)
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throws ServletException, IOException {
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GoogleBaseEntry entry;
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try {
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URL feedUrl = urlFactory.getSnippetsEntryURL(id);
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entry = service.getEntry(feedUrl, GoogleBaseEntry.class);
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} catch (ServiceException e) {
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RecipeUtil.logServiceException(this, e);
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RecipeUtil.forwardToErrorPage(request, response, e);
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return;
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}
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Recipe recipe = new Recipe(entry);
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request.setAttribute(RecipeUtil.RECIPE_ATTRIBUTE, recipe);
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RecipeSearch results = new RecipeSearch(service, urlFactory, false);
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RecipeUtil.setRecipeSearch(request, results);
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// Forward to the JSP
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request.getRequestDispatcher(DISPLAY_JSP).forward(request, response);
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}
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}
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