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 files COPYING and Copyright.html. *
009 * COPYING can be found at the root of the source code distribution tree.    *
010 * Or, see https://support.hdfgroup.org/products/licenses.html               *
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.eclipse.swt.widgets.Shell;
018
019import hdf.view.Tools;
020import hdf.view.ViewProperties;
021import hdf.view.DataView.DataViewManager;
022import hdf.view.ImageView.ImageView;
023
024/**
025 * A simple Factory class which returns concrete instances of the default
026 * PaletteView.
027 *
028 * @author jhenderson
029 * @version 1.0 4/18/2018
030 */
031public class DefaultPaletteViewFactory extends PaletteViewFactory {
032
033    private static final org.slf4j.Logger log = org.slf4j.LoggerFactory.getLogger(DefaultPaletteViewFactory.class);
034
035    @Override
036    public PaletteView getPaletteView(Shell parent, DataViewManager viewer, ImageView theImageView) throws ClassNotFoundException {
037        String dataViewName = null;
038        Object[] initargs;
039        PaletteView theView = null;
040
041        dataViewName = ViewProperties.DEFAULT_PALETTEVIEW_NAME;
042
043        Class<?> theClass = null;
044        try {
045            log.trace("getPaletteView(): Class.forName({})", dataViewName);
046
047            /* Attempt to load the class by the given name */
048            theClass = Class.forName(dataViewName);
049        }
050        catch (Exception ex) {
051            log.debug("getPaletteView(): unable to load default PaletteView class by name({})", dataViewName);
052            theClass = null;
053        }
054
055        if (theClass == null) throw new ClassNotFoundException();
056
057        try {
058            initargs = new Object[] { parent, viewer, theImageView };
059
060            theView = (PaletteView) Tools.newInstance(theClass, initargs);
061
062            log.trace("getPaletteView(): returning PaletteView instance {}", theView);
063        }
064        catch (Exception ex) {
065            log.debug("getPaletteView(): Error instantiating class:", ex);
066            theView = null;
067        }
068
069        return theView;
070    }
071
072}