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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.graph;

import java.util.Collections;
import java.util.LinkedHashMap;
import java.util.Map;

/**
 * A graph edge.
 */
class GVEdge {
    private final String source;
    private final String target;
    private final Map attributes;

    /**
     * Construct a new graph edge.
     * @param src The source node ID.
     * @param tgt The source node ID.
     * @param attrs The edge attributes.
     */
    public GVEdge(String src, String tgt, Map attrs) {
        source = src;
        target = tgt;
        attributes = Collections.unmodifiableMap(new LinkedHashMap(attrs));
    }

    public String getSource() {
        return source;
    }

    public String getTarget() {
        return target;
    }

    public Map getAttributes() {
        return attributes;
    }
}