01: // Copyright 2006 The Apache Software Foundation
02: //
03: // Licensed under the Apache License, Version 2.0 (the "License");
04: // you may not use this file except in compliance with the License.
05: // You may obtain a copy of the License at
06: //
07: // http://www.apache.org/licenses/LICENSE-2.0
08: //
09: // Unless required by applicable law or agreed to in writing, software
10: // distributed under the License is distributed on an "AS IS" BASIS,
11: // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12: // See the License for the specific language governing permissions and
13: // limitations under the License.
14:
15: package org.apache.tapestry.annotations;
16:
17: import static java.lang.annotation.ElementType.FIELD;
18: import static java.lang.annotation.RetentionPolicy.RUNTIME;
19:
20: import java.lang.annotation.Documented;
21: import java.lang.annotation.Retention;
22: import java.lang.annotation.Target;
23:
24: /**
25: * Defines an <em>implementation</em> mixin for a comopnent.
26: */
27: @Target(FIELD)
28: @Documented
29: @Retention(RUNTIME)
30: public @interface Mixin {
31:
32: /**
33: * Defines the type of mixin, using a logical mixin name. This value takes precendence over the
34: * type of field (to which the annotation is attached). In such cases, it is presumed that the
35: * field's type is an interface implemented by the actual mixin. The default value (the empty
36: * string) directs Tapestry to use the field type as the mixin class to instantiate and attach
37: * to the component.
38: */
39: String value() default "";
40: }
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