001/*
002 * Copyright 2012-2017 the original author or authors.
003 *
004 * Licensed under the Apache License, Version 2.0 (the "License");
005 * you may not use this file except in compliance with the License.
006 * You may obtain a copy of the License at
007 *
008 *      http://www.apache.org/licenses/LICENSE-2.0
009 *
010 * Unless required by applicable law or agreed to in writing, software
011 * distributed under the License is distributed on an "AS IS" BASIS,
012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
013 * See the License for the specific language governing permissions and
014 * limitations under the License.
015 */
016
017package org.springframework.boot.autoconfigure.condition;
018
019import java.lang.annotation.Documented;
020import java.lang.annotation.ElementType;
021import java.lang.annotation.Retention;
022import java.lang.annotation.RetentionPolicy;
023import java.lang.annotation.Target;
024
025import org.springframework.context.annotation.Conditional;
026
027/**
028 * {@link Conditional} that only matches when the specified classes are not on the
029 * classpath.
030 *
031 * @author Dave Syer
032 */
033@Target({ ElementType.TYPE, ElementType.METHOD })
034@Retention(RetentionPolicy.RUNTIME)
035@Documented
036@Conditional(OnClassCondition.class)
037public @interface ConditionalOnMissingClass {
038
039        /**
040         * The names of the classes that must not be present.
041         * @return the names of the classes that must not be present
042         */
043        String[] value() default {};
044
045}