Classes in this File | Line Coverage | Branch Coverage | Complexity | ||||
TurbinePull |
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1 | package org.apache.turbine.services.pull; | |
2 | ||
3 | ||
4 | /* | |
5 | * Licensed to the Apache Software Foundation (ASF) under one | |
6 | * or more contributor license agreements. See the NOTICE file | |
7 | * distributed with this work for additional information | |
8 | * regarding copyright ownership. The ASF licenses this file | |
9 | * to you under the Apache License, Version 2.0 (the | |
10 | * "License"); you may not use this file except in compliance | |
11 | * with the License. You may obtain a copy of the License at | |
12 | * | |
13 | * http://www.apache.org/licenses/LICENSE-2.0 | |
14 | * | |
15 | * Unless required by applicable law or agreed to in writing, | |
16 | * software distributed under the License is distributed on an | |
17 | * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY | |
18 | * KIND, either express or implied. See the License for the | |
19 | * specific language governing permissions and limitations | |
20 | * under the License. | |
21 | */ | |
22 | ||
23 | ||
24 | import org.apache.turbine.pipeline.PipelineData; | |
25 | import org.apache.turbine.services.TurbineServices; | |
26 | import org.apache.turbine.util.RunData; | |
27 | import org.apache.velocity.context.Context; | |
28 | ||
29 | /** | |
30 | * This is a Facade class for PullService. | |
31 | * | |
32 | * This class provides static methods that call related methods of the | |
33 | * implementation of the PullService used by the System, according to | |
34 | * the settings in TurbineResources. | |
35 | * | |
36 | * @author <a href="mailto:jvanzyl@periapt.com">Jason van Zyl</a> | |
37 | * @author <a href="mailto:dlr@finemaltcoding.com">Daniel Rall</a> | |
38 | * @author <a href="mailto:hps@intermeta.de">Henning P. Schmiedehausen</a> | |
39 | * @author <a href="mailto:peter@courcoux.biz">Peter Courcoux</a> | |
40 | * @version $Id: TurbinePull.java 1078552 2011-03-06 19:58:46Z tv $ | |
41 | */ | |
42 | 0 | public abstract class TurbinePull |
43 | { | |
44 | /** | |
45 | * Utility method for accessing the service | |
46 | * implementation | |
47 | * | |
48 | * @return a PullService implementation instance | |
49 | */ | |
50 | public static PullService getService() | |
51 | { | |
52 | 120 | return (PullService) TurbineServices |
53 | .getInstance().getService(PullService.SERVICE_NAME); | |
54 | } | |
55 | ||
56 | /** | |
57 | * Get the context containing global tools that will be | |
58 | * use as part of the Turbine Pull Model. | |
59 | * | |
60 | * @return A Context object which contains the | |
61 | * Global Tool instances. | |
62 | */ | |
63 | public static final Context getGlobalContext() | |
64 | { | |
65 | 0 | return getService().getGlobalContext(); |
66 | } | |
67 | ||
68 | /** | |
69 | * Checks whether this service has been registered. This is | |
70 | * required by the TurbineVelocityService so it can determine | |
71 | * whether to attempt to place the ToolBox in the context. | |
72 | * <p> | |
73 | * So users can use Turbine with templates in the traditional | |
74 | * manner. If the Pull Service is not listed in | |
75 | * <code>TurbineResources.props</code>, or no tools are specified | |
76 | * the TurbineVelocityService will behave in its traditional | |
77 | * manner. | |
78 | */ | |
79 | public static final boolean isRegistered() | |
80 | { | |
81 | 62 | return TurbineServices.getInstance() |
82 | .isRegistered(PullService.SERVICE_NAME); | |
83 | } | |
84 | ||
85 | /** | |
86 | * Return the absolute path of the resources directory | |
87 | * used by application tools. | |
88 | * | |
89 | * @return A directory path in the file system or null. | |
90 | */ | |
91 | public static final String getAbsolutePathToResourcesDirectory() | |
92 | { | |
93 | 0 | return getService().getAbsolutePathToResourcesDirectory(); |
94 | } | |
95 | ||
96 | /** | |
97 | * Return the resources directory. This is relative | |
98 | * to the webapp context. | |
99 | * | |
100 | * @return A directory path to the resources directory relative to the webapp root or null. | |
101 | */ | |
102 | public static final String getResourcesDirectory() | |
103 | { | |
104 | 46 | return getService().getResourcesDirectory(); |
105 | } | |
106 | ||
107 | /** | |
108 | * Populate the given context with all request, session | |
109 | * and persistent scope tools (it is assumed that the context | |
110 | * already wraps the global context, and thus already contains | |
111 | * the global tools). | |
112 | * | |
113 | * @param context a Velocity Context to populate | |
114 | * @param data a RunData object for request specific data | |
115 | */ | |
116 | public static void populateContext(Context context, PipelineData pipelineData) | |
117 | { | |
118 | 0 | getService().populateContext(context, pipelineData); |
119 | 0 | } |
120 | ||
121 | /** | |
122 | * Populate the given context with all request, session | |
123 | * and persistent scope tools (it is assumed that the context | |
124 | * already wraps the global context, and thus already contains | |
125 | * the global tools). | |
126 | * | |
127 | * @param context a Velocity Context to populate | |
128 | * @param data a RunData object for request specific data | |
129 | */ | |
130 | public static void populateContext(Context context, RunData data) | |
131 | { | |
132 | 0 | getService().populateContext(context, data); |
133 | 0 | } |
134 | ||
135 | /** | |
136 | * Release tool instances from the given context to the | |
137 | * object pool | |
138 | * | |
139 | * @param context a Velocity Context to release tools from | |
140 | */ | |
141 | public static void releaseTools(Context context) | |
142 | { | |
143 | 0 | getService().releaseTools(context); |
144 | 0 | } |
145 | ||
146 | /** | |
147 | * Helper method that allows you to easily get a tool | |
148 | * from a Context. Essentially, it just does the cast | |
149 | * to an Application tool for you. | |
150 | * | |
151 | * @param context a Velocity Context to get tools from | |
152 | * @param name the name of the tool to get | |
153 | * @return ApplicationTool null if no tool could be found | |
154 | */ | |
155 | public static ApplicationTool getTool(Context context, | |
156 | String name) | |
157 | { | |
158 | try | |
159 | { | |
160 | 0 | return (ApplicationTool) context.get(name); |
161 | } | |
162 | 0 | catch (Exception e) |
163 | { | |
164 | // ignore | |
165 | } | |
166 | 0 | return null; |
167 | } | |
168 | } |