##### Coverage Report - org.apache.turbine.modules.GenericLoader

Classes in this File | Line Coverage | Branch Coverage | Complexity
GenericLoader |
83% | 25/30
90% | 9/10
| 2.0;2

1 |  |
     package org.apache.turbine.modules;
2 |  |
3 |  |
     /*
4 |  |
      * Licensed to the Apache Software Foundation (ASF) under one
5 |  |
      * or more contributor license agreements.  See the NOTICE file
6 |  |
      * distributed with this work for additional information
7 |  |
      * regarding copyright ownership.  The ASF licenses this file
8 |  |
      * to you under the Apache License, Version 2.0 (the
9 |  |
      * "License"); you may not use this file except in compliance
10 |  |
      * with the License.  You may obtain a copy of the License at
11 |  |
      *
12 |  |
      *   http://www.apache.org/licenses/LICENSE-2.0
13 |  |
      *
14 |  |
      * Unless required by applicable law or agreed to in writing,
15 |  |
      * software distributed under the License is distributed on an
16 |  |
      * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
17 |  |
      * KIND, either express or implied.  See the License for the
18 |  |
      * specific language governing permissions and limitations
19 |  |
      * under the License.
20 |  |
      */
21 |  |
22 |  |
     import java.util.ArrayList;
23 |  |
     import java.util.List;
24 |  |
25 |  |
     import org.apache.turbine.Turbine;
26 |  |
     import org.apache.turbine.TurbineConstants;
27 |  |
     import org.apache.turbine.pipeline.PipelineData;
28 |  |
     import org.apache.turbine.services.TurbineServices;
29 |  |
     import org.apache.turbine.services.assemblerbroker.AssemblerBrokerService;
30 |  |
31 |  |
     /**
32 |  |
      * This is the base class for the loaders. It contains code that is
33 |  |
      * used across all of the loaders. It also specifies the interface
34 |  |
      * that is required to be called a Loader.
35 |  |
      *
36 |  |
      * @author <a href="mailto:mbryson@mont.mindspring.com">Dave Bryson</a>
37 |  |
      * @author <a href="mailto:hps@intermeta.de">Henning P. Schmiedehausen</a>
38 |  |
      * @author <a href="mailto:peter@courcoux.biz">Peter Courcoux</a>
39 |  |
      * @param <T> the specialized assembler type
40 |  |
      */
41 |  |
     public abstract class GenericLoader<T extends Assembler>
42 |  |
     {
43 |  |
         /** The Assembler Broker Service */
44 |  |
         protected AssemblerBrokerService ab;
45 |  |
46 |  |
         /** @serial This can be serialized */
47 | 194 |
         private boolean reload = false;
48 |  |
49 |  |
         /** Base packages path for Turbine */
50 |  |
         private static final String TURBINE_PACKAGE = "org.apache.turbine.modules";
51 |  |
52 |  |
         /** Packages paths for Turbine */
53 | 34 |
         private static List<String> TURBINE_PACKAGES = null;
54 |  |
55 |  |
         /**
56 |  |
          * Basic constructor for creating a loader.
57 |  |
          */
58 |  |
         public GenericLoader()
59 |  |
         {
60 | 194 |
             super();
61 | 194 |
             ab = (AssemblerBrokerService)TurbineServices.getInstance().getService(AssemblerBrokerService.SERVICE_NAME);
62 | 194 |
         }
63 |  |
64 |  |
         /**
65 |  |
          * Attempts to load and execute the external action that has been
66 |  |
          * set.
67 |  |
          * @param pipelineData the Turbine request
68 |  |
          * @param name the name of the assembler module
69 |  |
          * @throws Exception a generic exception.
70 |  |
          */
71 |  |
         public abstract void exec(PipelineData pipelineData, String name)
72 |  |
                 throws Exception;
73 |  |
74 |  |
         /**
75 |  |
          * Returns whether or not this external action is reload itself.
76 |  |
          * This is in cases where the Next button would be clicked, but
77 |  |
          * since we are checking for that, we would go into an endless
78 |  |
          * loop.
79 |  |
          *
80 |  |
          * @return True if the action is reload.
81 |  |
          */
82 |  |
         public boolean reload()
83 |  |
         {
84 | 0 |
             return this.reload;
85 |  |
         }
86 |  |
87 |  |
         /**
88 |  |
          * Sets whether or not this external action is reload itself.
89 |  |
          * This is in cases where the Next button would be clicked, but
90 |  |
          * since we are checking for that, we would go into an endless
91 |  |
          * loop.
92 |  |
          *
93 |  |
          * @param reload True if the action must be marked as reload.
94 |  |
          * @return Itself.
95 |  |
          */
96 |  |
         public GenericLoader<T> setReload(boolean reload)
97 |  |
         {
98 | 0 |
             this.reload = reload;
99 | 0 |
             return this;
100 |  |
         }
101 |  |
102 |  |
         /**
103 |  |
          * Gets the base package where Turbine should find its default
104 |  |
          * modules.
105 |  |
          *
106 |  |
          * @return A String with the base package name.
107 |  |
          */
108 |  |
         public static String getBasePackage()
109 |  |
         {
110 | 1 |
             return TURBINE_PACKAGE;
111 |  |
         }
112 |  |
113 |  |
         /**
114 |  |
          * Gets the package list where Turbine should find its
115 |  |
          * modules.
116 |  |
          *
117 |  |
          * @return A List with the package names (including the base package).
118 |  |
          */
119 |  |
         public static List<String> getPackages()
120 |  |
         {
121 | 96 |
             if (TURBINE_PACKAGES == null)
122 |  |
             {
123 | 33 |
                 List<String> turbinePackages = new ArrayList<String>();
124 | 33 |
                 List<Object> configTurbinePackages =
125 |  |
                     Turbine.getConfiguration()
126 |  |
                             .getList(TurbineConstants.MODULE_PACKAGES);
127 | 33 |
                 for (Object o : configTurbinePackages)
128 |  |
                 {
129 | 74 |
                         turbinePackages.add((String)o);
130 | 74 |
                 }
131 |  |
132 | 33 |
                 TURBINE_PACKAGES = turbinePackages;
133 |  |
             }
134 |  |
135 | 96 |
             List<String> packages = TURBINE_PACKAGES;
136 |  |
137 | 96 |
             if (!packages.contains(TURBINE_PACKAGE))
138 |  |
             {
139 | 9 |
                 packages.add(TURBINE_PACKAGE);
140 |  |
             }
141 |  |
142 | 96 |
             return packages;
143 |  |
         }
144 |  |
145 |  |
         /**
146 |  |
          * Pulls out an instance of the object by name.  Name is just the
147 |  |
          * single name of the object.
148 |  |
          *
149 |  |
          * @param type Type of the assembler.
150 |  |
          * @param name Name of object instance.
151 |  |
          * @return A Screen with the specified name, or null.
152 |  |
          * @throws Exception a generic exception.
153 |  |
          */
154 |  |
         protected T getAssembler(Class<T> type, String name)
155 |  |
             throws Exception
156 |  |
         {
157 | 167 |
             T asm = null;
158 |  |
159 |  |
             try
160 |  |
             {
161 | 167 |
                 if (ab != null)
162 |  |
                 {
163 |  |
                     // Attempt to load the assembler
164 | 167 |
                     asm = ab.getAssembler(type, name);
165 |  |
                 }
166 |  |
             }
167 | 0 |
             catch (ClassCastException cce)
168 |  |
             {
169 |  |
                 // This can alternatively let this exception be thrown
170 |  |
                 // So that the ClassCastException is shown in the
171 |  |
                 // browser window.  Like this it shows "Screen not Found"
172 | 0 |
                 asm = null;
173 | 167 |
             }
174 |  |
175 | 167 |
             if (asm == null)
176 |  |
             {
177 |  |
                 // If we did not find a screen we should try and give
178 |  |
                 // the user a reason for that...
179 |  |
                 // FIX ME: The AssemblerFactories should each add it's
180 |  |
                 // own string here...
181 | 63 |
                 List<String> packages = GenericLoader.getPackages();
182 |  |
183 | 63 |
                 throw new ClassNotFoundException(
184 |  |
                         "\n\n\tRequested " + type + " not found: " + name +
185 |  |
                         "\n\tTurbine looked in the following " +
186 |  |
                         "modules.packages path: \n\t" + packages.toString() + "\n");
187 |  |
             }
188 |  |
189 | 104 |
             return asm;
190 |  |
         }
191 |  |
     }