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Facilities for evaluating recommender algorithms.

There is a newer version: 3.0-T5

/*
 * LensKit, an open source recommender systems toolkit.
 * Copyright 2010-2014 LensKit Contributors.  See CONTRIBUTORS.md.
 * Work on LensKit has been funded by the National Science Foundation under
 * grants IIS 05-34939, 08-08692, 08-12148, and 10-17697.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License as
 * published by the Free Software Foundation; either version 2.1 of the
 * License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
 * FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
 * details.
 *
 * You should have received a copy of the GNU General Public License along with
 * this program; if not, write to the Free Software Foundation, Inc., 51
 * Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
 */
package org.grouplens.lenskit.eval.script;

import java.lang.annotation.*;

/**
 * Specify a delegate class to be used to configure an object of the type to which this annotation
 * is applied (typically either a builder or a task). When using a builder to instantiate a setter
 * or adder parameter, if the builder class has this annotation the specified class is used as the
 * delegate instead of the default {@link DefaultConfigDelegate} when invoking the builder closure.
 * 
 * The delegate class must have a public constructor that takes a single argument, the object to
 * be configured.
 * 
 *
 * @author GroupLens Research
 * @since 0.10
 */
@Documented
@Retention(RetentionPolicy.RUNTIME)
@Target(ElementType.TYPE)
public @interface ConfigDelegate {
    /**
     * The delegate implementation to use.
     *
     * @return The delegate class.
     */
    Class value();
}