001    /*
002     * Copyright 2004 Stephen J. McConnell.
003     *
004     * Licensed  under the  Apache License,  Version 2.0  (the "License");
005     * you may not use  this file  except in  compliance with the License.
006     * You may obtain a copy of the License at
007     *
008     *   http://www.apache.org/licenses/LICENSE-2.0
009     *
010     * Unless required by applicable law or agreed to in writing, software
011     * distributed  under the  License is distributed on an "AS IS" BASIS,
012     * WITHOUT  WARRANTIES OR CONDITIONS  OF ANY KIND, either  express  or
013     * implied.
014     *
015     * See the License for the specific language governing permissions and
016     * limitations under the License.
017     */
018    
019    package net.dpml.transit.monitor;
020    
021    import java.net.URL;
022    
023    import net.dpml.util.Logger;
024    
025    /**
026     * Utility interface defining a monitor adapter.  The contract defines a set of operations
027     * dealing with the notification of debug, info and error messages, together with
028     * and operation supporting the construction of a messages dedicated to a download
029     * action.
030     *
031     * @author <a href="http://www.dpml.net">Digital Product Meta Library</a>
032     * @version 1.0.3
033     */
034    public interface Adapter extends Logger
035    {
036        /**
037         * Hnadle download notification.
038         * @param resource the resource under attention
039         * @param expected the estimated download size
040         * @param count the progress towards expected
041         */
042        void notify( URL resource, int expected, int count );
043    }
044    
045