001    /*
002     * Copyright (C) 2008-2010 by Holger Arndt
003     *
004     * This file is part of the Universal Java Matrix Package (UJMP).
005     * See the NOTICE file distributed with this work for additional
006     * information regarding copyright ownership and licensing.
007     *
008     * UJMP is free software; you can redistribute it and/or modify
009     * it under the terms of the GNU Lesser General Public License as
010     * published by the Free Software Foundation; either version 2
011     * of the License, or (at your option) any later version.
012     *
013     * UJMP is distributed in the hope that it will be useful,
014     * but WITHOUT ANY WARRANTY; without even the implied warranty of
015     * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
016     * GNU Lesser General Public License for more details.
017     *
018     * You should have received a copy of the GNU Lesser General Public
019     * License along with UJMP; if not, write to the
020     * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
021     * Boston, MA  02110-1301  USA
022     */
023    
024    package org.ujmp.core.util;
025    
026    import java.util.Collection;
027    
028    import org.ujmp.core.interfaces.HasDependencies;
029    import org.ujmp.core.interfaces.HasDescription;
030    import org.ujmp.core.interfaces.HasStatus;
031    
032    public abstract class AbstractPlugin implements HasDescription, HasDependencies, HasStatus {
033    
034            public abstract Collection<String> getNeededClasses();
035    
036            public String getStatus() {
037                    for (String s : getNeededClasses()) {
038                            try {
039                                    Class.forName(s);
040                            } catch (ClassNotFoundException e) {
041                                    return "Error: Class " + s + " not found";
042                            } catch (Throwable e) {
043                                    return "Error: Class " + s + " has error: " + e;
044                            }
045                    }
046                    return "ok";
047            }
048    
049            public boolean isAvailable() {
050                    return "ok".equals(getStatus());
051            }
052    
053            public final void setDescription(String description) {
054            }
055    }