ClientInitializer


1   package org.apache.beehive.controls.runtime.generator;
2   /*
3    * Copyright 2004 The Apache Software Foundation.
4    *
5    * Licensed under the Apache License, Version 2.0 (the "License");
6    * you may not use this file except in compliance with the License.
7    * You may obtain a copy of the License at
8    * 
9    *     http://www.apache.org/licenses/LICENSE-2.0
10   * 
11   * Unless required by applicable law or agreed to in writing, software
12   * distributed under the License is distributed on an "AS IS" BASIS,
13   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14   * See the License for the specific language governing permissions and
15   * limitations under the License.
16   *
17   * $Header:$
18   */
19  
20  import java.lang.reflect.Field  ;
21  import java.util.ArrayList  ;
22  
23  /**
24   * The ClientInitializer represents a generated class that contains the code
25   * necessary to initialize a client that uses controls declaratively (via Control and
26   * EventHandler annotations).
27   */
28  public class ClientInitializer
29  {
30      /**
31       * Constructs a new ClientInitializer class
32       * @param controlClient the control client this initializer will target
33       */
34      protected ClientInitializer(AptControlClient controlClient)
35      {
36          super();
37  
38          assert controlClient != null;
39  
40          _controlClient = controlClient;
41          _packageName = _controlClient.getPackage();
42          _shortName = _controlClient.getShortName() + "ClientInitializer";
43          _className = isRootPackage() ? _shortName : _packageName + "." + _shortName;
44  
45          //
46          // Compute the list of impl fields that will require reflected Fields.  This is
47          // done unconditionally for all @Control fields (to support PropertyMap initialization)
48          //
49  
50          _reflectFields = new ArrayList  <AptField>();
51          for (AptField genField : _controlClient.getControls())
52              _reflectFields.add(genField);
53      }
54  
55      /**
56       * Returns the package name of the ClientInitializer
57       */
58      public String   getPackage() { return _packageName; }
59  
60      /**
61       * Is the ClientInitializer in the root package?
62       */
63      public boolean isRootPackage() { return getPackage().equals(""); }
64  
65      /**
66       * Returns the unqualified classname of the ClientInitializer
67       */
68      public String   getShortName() { return _shortName; }
69  
70      /**
71       * Returns the fully qualfied classname of the ClientInitializer
72       */
73      public String   getClassName() { return _className; }
74  
75      /**
76       * Returns the ControlBean implementation instance
77       */
78      public AptControlClient getControlClient() { return _controlClient; }
79  
80      public ClientInitializer getSuperClass() { return null; }
81  
82      /**
83       * Returns true if the initializer will use Reflection to initialize the field, false
84       * otherwise.
85       */
86      static public boolean needsReflection(AptField genField)
87      {
88          //
89          // Since initializers are generated into the same package as the initialized class,
90          // only private access fields require reflection
91          //
92          String   accessModifier = genField.getAccessModifier();
93          if (accessModifier.equals("private"))
94              return true;
95  
96          return false;
97      }
98  
99      /**
100      * Returns the list of impl class fields that must be initialized using Reflection
101      */
102     public ArrayList  <AptField> getReflectFields()
103     {
104         return _reflectFields;
105     }
106 
107     String   _packageName;
108     String   _shortName;
109     String   _className;
110     AptControlClient _controlClient;
111     ArrayList  <AptField> _reflectFields;
112 }
113
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