| /** |
| * Copyright (C) 2008 Google Inc. |
| * |
| * Licensed 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 com.google.inject.servlet; |
| |
| import com.google.inject.AbstractModule; |
| import com.google.inject.Key; |
| import com.google.inject.TypeLiteral; |
| import com.google.inject.internal.Lists; |
| import com.google.inject.internal.Sets; |
| import com.google.inject.internal.UniqueAnnotations; |
| import java.util.HashMap; |
| import java.util.List; |
| import java.util.Map; |
| import java.util.Set; |
| import javax.servlet.http.HttpServlet; |
| |
| /** |
| * Builds the guice module that binds configured servlets, with their |
| * wrapper ServletDefinitions. Is part of the binding EDSL. Very similar to |
| * {@link com.google.inject.servlet.FiltersModuleBuilder}. |
| * |
| * @author Dhanji R. Prasanna (dhanji@gmail.com) |
| */ |
| class ServletsModuleBuilder extends AbstractModule { |
| private final List<ServletDefinition> servletDefinitions = Lists.newArrayList(); |
| |
| //invoked on injector config |
| @Override |
| protected void configure() { |
| |
| // Ensure that servlets are not bound twice to the same pattern. |
| Set<String> servletUris = Sets.newHashSet(); |
| for (ServletDefinition servletDefinition : servletDefinitions) { |
| if (servletUris.contains(servletDefinition.getPattern())) { |
| addError("More than one servlet was mapped to the same URI pattern: " |
| + servletDefinition.getPattern()); |
| } |
| else { |
| servletUris.add(servletDefinition.getPattern()); |
| } |
| } |
| |
| // Bind these servlet definitions to a unique random key. Doesn't matter what it is, |
| // coz it's never used. |
| bind(Key.get(new TypeLiteral<List<ServletDefinition>>() {}, UniqueAnnotations.create())) |
| .toInstance(servletDefinitions); |
| } |
| |
| //the first level of the EDSL-- |
| public ServletModule.ServletKeyBindingBuilder serve(List<String> urlPatterns) { |
| return new ServletKeyBindingBuilderImpl(urlPatterns, UriPatternType.SERVLET); |
| } |
| |
| public ServletModule.ServletKeyBindingBuilder serveRegex(List<String> regexes) { |
| return new ServletKeyBindingBuilderImpl(regexes, UriPatternType.REGEX); |
| } |
| |
| //non-static inner class so it can access state of enclosing module class |
| class ServletKeyBindingBuilderImpl implements ServletModule.ServletKeyBindingBuilder { |
| private final List<String> uriPatterns; |
| private final UriPatternType uriPatternType; |
| |
| private ServletKeyBindingBuilderImpl(List<String> uriPatterns, UriPatternType uriPatternType) { |
| this.uriPatterns = uriPatterns; |
| this.uriPatternType = uriPatternType; |
| } |
| |
| public void with(Class<? extends HttpServlet> servletKey) { |
| with(Key.get(servletKey)); |
| } |
| |
| public void with(Key<? extends HttpServlet> servletKey) { |
| with(servletKey, new HashMap<String, String>()); |
| } |
| |
| public void with(Class<? extends HttpServlet> servletKey, |
| Map<String, String> contextParams) { |
| with(Key.get(servletKey), contextParams); |
| } |
| |
| public void with(Key<? extends HttpServlet> servletKey, |
| Map<String, String> contextParams) { |
| |
| for (String pattern : uriPatterns) { |
| servletDefinitions.add( |
| new ServletDefinition(pattern, servletKey, UriPatternType.get(uriPatternType, pattern), |
| contextParams)); |
| } |
| } |
| } |
| } |