01: /*
02: * Licensed to the Apache Software Foundation (ASF) under one or more
03: * contributor license agreements. See the NOTICE file distributed with
04: * this work for additional information regarding copyright ownership.
05: * The ASF licenses this file to You under the Apache License, Version 2.0
06: * (the "License"); you may not use this file except in compliance with
07: * the License. You may obtain a copy of the License at
08: *
09: * 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: package org.apache.beehive.controls.api.versioning;
20:
21: import java.lang.annotation.ElementType;
22: import java.lang.annotation.Retention;
23: import java.lang.annotation.RetentionPolicy;
24: import java.lang.annotation.Target;
25:
26: /**
27: * Specifies the maximum version of the control interface that this implementation
28: * supports. Allowed on control implementations (interfaces annotated with
29: * <sp>@ControlImplementation). This version requirement is enforced at compile time
30: * of the implementation, and at runtime when the implementation is classloaded.
31: */
32: @Retention(RetentionPolicy.RUNTIME)
33: @Target({ElementType.TYPE})
34: public @interface VersionSupported {
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: }
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