groovy.lang.GrabResolver Maven / Gradle / Ivy

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/*
 * Copyright 2003-2014 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 groovy.lang;

import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import java.lang.annotation.ElementType;

/**
 * Used to add a repository for resolving Grape dependencies.
 * 
 * For example:
 * 
 * {@code @GrabResolver}(name='restlet.org', root='http://maven.restlet.org')
 * {@code @Grab}(group='org.restlet', module='org.restlet', version='1.1.6')
 * class MyRestlet extends org.restlet.Restlet {
 *   // ...
 * }
 * 
 * By default, the Grapes subsystem uses an Ivy chained resolver. Each resolver
 * added using {@code @GrabResolver} is appended to the chain. By default, the grape
 * subsystem is shared globally, so added resolvers will become available for any subsequent
 * grab calls. Dependency resolution follows Ivy's artifact resolution which tries
 * to resolve artifacts in the order specified in the chain of resolvers.
 * 
 * Further information about customising grape behavior can be found on the Grape documentation page:
 * http://groovy.codehaus.org/Grape.
 *
 * @author Merlyn Albery-Speyer
 */
@Retention(RetentionPolicy.SOURCE)
@Target({
        ElementType.CONSTRUCTOR,
        ElementType.FIELD,
        ElementType.LOCAL_VARIABLE,
        ElementType.METHOD,
        ElementType.PARAMETER,
        ElementType.TYPE})
public @interface GrabResolver {
    /**
     * Allows a shorthand form which sets the name and root to this value.
     * Must not be used if name() or root() is non-empty.
     */
    String value() default "";

    /**
     * A meaningful name for a repo containing the grape/artifact.
     * A non-empty value is required unless value() is used.
     */
    String name() default "";

    /**
     * The URL for a repo containing the grape/artifact.
     * A non-empty value is required unless value() is used.
     */
    String root() default "";

    /**
     * Defaults to Maven2 compatibility. Set false for Ivy only compatibility.
     */
    boolean m2Compatible() default true;

    /**
     * By default, when a {@code @GrabResolver} annotation is used, a {@code Grape.addResolver()} call is added
     * to the static initializers of the class the annotatable node appears in.
     * If you wish to disable this, add {@code initClass=false} to the annotation.
     */
    boolean initClass() default true;
}