ControlImplementation


1   package org.apache.beehive.controls.api.bean;
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.annotation.ElementType  ;
21  import java.lang.annotation.Retention  ;
22  import java.lang.annotation.RetentionPolicy  ;
23  import java.lang.annotation.Target  ;
24  
25  import org.apache.beehive.controls.api.assembly.ControlAssembler;
26  import org.apache.beehive.controls.api.assembly.DefaultControlAssembler;
27  
28  /**
29   * The ControlImplementation annotation type is used to annotate the implementation class for a
30   * Java Control.  It marks the class as a control implementation and (in the future) parameterizes
31   * it.
32   */
33  @Retention  (RetentionPolicy.RUNTIME)
34  @Target  ({ElementType.TYPE})
35  public @interface ControlImplementation
36  {
37      /** class name for the Class (which implements
38       *  com.bea.control.assembly.ControlAssembler) whose assemble()
39       *  method is called at assembly time - if left Void then no
40       *  special assembly is needed
41       */
42      Class   assemblyHelperClass() default java.lang.Void  .class; // DEPRECATED
43  
44      /**
45       * Class that implements ControlAssembler, which gets called at assembly time.
46       * Default implementation does nothing.
47       */
48      Class  <? extends ControlAssembler> assembler() default DefaultControlAssembler.class;
49  
50      /**
51       * Specifies whether the control implementation class contains state that should be
52       * serialized as part of the containing Control/JavaBean or is fully stateless/transient. 
53       */
54      boolean isTransient() default false;  // default to assuming stateful
55  }
56
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