001/*****************************************************************************
002 * Copyright by The HDF Group.                                               *
003 * Copyright by the Board of Trustees of the University of Illinois.         *
004 * All rights reserved.                                                      *
005 *                                                                           *
006 * This file is part of the HDF Java Products distribution.                  *
007 * The full copyright notice, including terms governing use, modification,   *
008 * and redistribution, is contained in the COPYING file, which can be found  *
009 * at the root of the source code distribution tree,                         *
010 * or in https://www.hdfgroup.org/licenses.                                  *
011 * If you do not have access to either file, you may request a copy from     *
012 * help@hdfgroup.org.                                                        *
013 ****************************************************************************/
014
015package hdf.view.PaletteView;
016
017import org.slf4j.Logger;
018import org.slf4j.LoggerFactory;
019
020import org.eclipse.swt.widgets.Shell;
021
022import hdf.view.Tools;
023import hdf.view.ViewProperties;
024import hdf.view.DataView.DataViewManager;
025import hdf.view.ImageView.ImageView;
026
027/**
028 * A simple Factory class which returns concrete instances of the default
029 * PaletteView.
030 *
031 * @author jhenderson
032 * @version 1.0 4/18/2018
033 */
034public class DefaultPaletteViewFactory extends PaletteViewFactory {
035
036    private static final Logger log = LoggerFactory.getLogger(DefaultPaletteViewFactory.class);
037
038    @Override
039    public PaletteView getPaletteView(Shell parent, DataViewManager viewer, ImageView theImageView) throws ClassNotFoundException {
040        String dataViewName = null;
041        Object[] initargs;
042        PaletteView theView = null;
043
044        dataViewName = ViewProperties.DEFAULT_PALETTEVIEW_NAME;
045
046        Class<?> theClass = null;
047        try {
048            log.trace("getPaletteView(): Class.forName({})", dataViewName);
049
050            /* Attempt to load the class by the given name */
051            theClass = Class.forName(dataViewName);
052        }
053        catch (Exception ex) {
054            log.debug("getPaletteView(): unable to load default PaletteView class by name({})", dataViewName);
055            theClass = null;
056        }
057
058        if (theClass == null) throw new ClassNotFoundException();
059
060        try {
061            initargs = new Object[] { parent, viewer, theImageView };
062
063            theView = (PaletteView) Tools.newInstance(theClass, initargs);
064
065            log.trace("getPaletteView(): returning PaletteView instance {}", theView);
066        }
067        catch (Exception ex) {
068            log.debug("getPaletteView(): Error instantiating class:", ex);
069            theView = null;
070        }
071
072        return theView;
073    }
074
075}