1 /*
2 * Copyright 2013 smartics, Kronseder & Reiner GmbH
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16 package de.smartics.resteasy.hypermedia.renderer;
17
18 import java.util.Locale;
19
20 import javax.servlet.http.HttpServletRequest;
21 import javax.servlet.http.HttpServletResponse;
22 import javax.ws.rs.core.Context;
23 import javax.ws.rs.core.Response;
24 import javax.ws.rs.core.UriInfo;
25 import javax.ws.rs.ext.ExceptionMapper;
26
27 import org.jboss.resteasy.spi.HttpRequest;
28 import org.jboss.resteasy.spi.HttpResponse;
29
30 import de.smartics.resteasy.hypermedia.resources.ResourceDiscovery;
31 import de.smartics.resteasy.hypermedia.resources.Resources;
32
33 /**
34 * Base implementation for handlers of raised exceptions.
35 */
36 public abstract class AbstractExceptionHandler implements
37 ExceptionMapper<Throwable>
38 {
39 // ********************************* Fields *********************************
40
41 // --- constants ------------------------------------------------------------
42
43 // --- members --------------------------------------------------------------
44
45 /**
46 * The response to write to.
47 */
48 @Context
49 protected HttpResponse response;
50
51 /**
52 * The request to access the request headers.
53 */
54 @Context
55 protected HttpRequest request;
56
57 /**
58 * The HTTP request.
59 */
60 @Context
61 protected HttpServletRequest servletRequest;
62
63 /**
64 * The HTTP response.
65 */
66 @Context
67 protected HttpServletResponse servletResponse;
68
69 /**
70 * Helper to construct paths.
71 */
72 @Context
73 protected UriInfo uriInfo;
74
75 // ****************************** Initializer *******************************
76
77 // ****************************** Constructors ******************************
78
79 // ****************************** Inner Classes *****************************
80
81 // ********************************* Methods ********************************
82
83 // --- init -----------------------------------------------------------------
84
85 // --- get&set --------------------------------------------------------------
86
87 // --- business -------------------------------------------------------------
88
89 /**
90 * Provides access to internationalization information.
91 *
92 * @return access to internationalization information.
93 */
94 protected abstract I18nProvider getI18nProvider();
95
96 /**
97 * Creates the resource context from injected information.
98 *
99 * @return the resource context from injected information.
100 */
101 protected ResourceContext createContext()
102 {
103 final LocalizationProvider l7nProvider = fetchLocalizationProvider();
104 final Resources resources = ResourceDiscovery.createDiscovery();
105 final ResourceContext context =
106 new ResourceContext.Builder().with(servletRequest)
107 .with(servletResponse).with(uriInfo).with(l7nProvider)
108 .with(resources).build();
109 return context;
110 }
111
112 private LocalizationProvider fetchLocalizationProvider()
113 {
114 final Locale locale = servletRequest.getLocale();
115 final LocalizationProvider l7nProvider =
116 getI18nProvider().getProvider(locale);
117 return l7nProvider;
118 }
119
120 @Override
121 public Response toResponse(final Throwable exception)
122 {
123 return null;
124 }
125
126 // --- object basics --------------------------------------------------------
127 }