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- /*
- * Copyright (C) 2012-present the original author or authors.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- * http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
- package org.pf4j;
-
- import static java.lang.annotation.ElementType.TYPE;
- import static java.lang.annotation.RetentionPolicy.RUNTIME;
-
- import java.lang.annotation.Documented;
- import java.lang.annotation.Inherited;
- import java.lang.annotation.Retention;
- import java.lang.annotation.Target;
-
- /**
- * @author Decebal Suiu
- */
- @Retention(RUNTIME)
- @Target(TYPE)
- @Inherited
- @Documented
- public @interface Extension {
-
- int ordinal() default 0;
-
- /**
- * An array of extension points, that are implemented by this extension.
- * This explicit configuration overrides the automatic detection of extension points in the
- * {@link org.pf4j.processor.ExtensionAnnotationProcessor}.
- * <p>
- * In case your extension is directly derived from an extension point this attribute is NOT required.
- * But under certain <a href="https://github.com/pf4j/pf4j/issues/264">more complex scenarios</a> it
- * might be useful to explicitly set the extension points for an extension.
- *
- * @return classes of extension points, that are implemented by this extension
- */
- Class<? extends ExtensionPoint>[] points() default {};
-
- /**
- * An array of plugin IDs, that have to be available in order to load this extension.
- * The {@link AbstractExtensionFinder} won't load this extension, if these plugins are not
- * available / started at runtime.
- * <p>
- * Notice: This feature requires the optional <a href="https://asm.ow2.io/">ASM library</a>
- * to be available on the applications classpath and has to be explicitly enabled via
- * {@link AbstractExtensionFinder#setCheckForExtensionDependencies(boolean)}.
- *
- * @return plugin IDs, that have to be available in order to load this extension
- */
- String[] plugins() default {};
-
- }
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