1 /*
2 * Copyright 2001-2005 The Apache Software Foundation.
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16 package org.apache.logging.log4j.catalog.api.annotation;
17
18 import java.lang.annotation.ElementType;
19 import java.lang.annotation.Retention;
20 import java.lang.annotation.RetentionPolicy;
21 import java.lang.annotation.Target;
22
23 import org.springframework.context.annotation.Conditional;
24
25 /**
26 * Prevents a bean from being created unless a property exists.
27 */
28 @Retention(RetentionPolicy.RUNTIME)
29 @Target({ElementType.TYPE, ElementType.METHOD})
30 @Conditional(value = PropertyExistsCondition.class)
31 public @interface ConditionOnPropertyExists {
32 /**
33 * The name of the property to test for existence.
34 * @return The property name.
35 */
36 public String value();
37 }