VersionSupported


1   package org.apache.beehive.controls.api.versioning;
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  /**
26   *  Specifies the maximum version of the control interface that this implementation
27   *  supports.  Allowed on control implementations (interfaces annotated with
28   *  <sp>@ControlImplementation).  This version requirement is enforced at compile time
29   *  of the implementation, and at runtime when the implementation is classloaded.
30   */
31  @Retention  (RetentionPolicy.RUNTIME)
32  @Target  ({ElementType.TYPE})
33  public @interface VersionSupported
34  {
35      /**
36       * The major version of the control interface that this implementation
37       * supports.  Any version number less than or equal to this value will suffice,
38       * implying that this constraint is only valid when backwards compatibility
39       * is part of the contract when increasing the version number.  Negative
40       * values mean that any major version is acceptable (in which case this
41       * annotation should probably just not be
42       * present).
43       */
44      int major(); 
45  
46      /**
47       * The minor version of the control interface that this implementation
48       * supports.  Any version number less than or equal to this value will suffice.
49       * Negative values mean that any minor version is acceptable (the default case).
50       */
51      int minor() default -1;
52  }
53
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