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 minimum version of the control interface that this extension
28: * requires. Allowed on control extensions (interfaces annotated with
29: * <sp>@ControlExtension), and on control field declarations (fields annotated
30: * with @Control). The version requirement is enforced at compile time of
31: * extensions and control client, and at runtime when the appropriate control
32: * bean is classloaded.
33: */
34: @Retention(RetentionPolicy.RUNTIME)
35: @Target({ElementType.TYPE,ElementType.FIELD})
36: public @interface VersionRequired {
37: /**
38: * The major version value required for this control extension or instance
39: * declaration to work. Any version number greater than or equal to this
40: * value will suffice, implying that this requirement is valid only when
41: * back compatibility is part of the contract when increasing the version
42: * number. Negative values mean that any major version is
43: * acceptable (in which case this annotation should probably just not be
44: * present).
45: */
46: int major();
47:
48: /**
49: * The minor version value required for this control extension or instance
50: * declaration to work. Any version number greater than or equal to this
51: * value will suffice. Negative values mean that any minor version is
52: * acceptable (the default case).
53: */
54: int minor() default -1;
55: }
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