001/*
002 * This library is part of OpenCms -
003 * the Open Source Content Management System
004 *
005 * Copyright (c) Alkacon Software GmbH & Co. KG (http://www.alkacon.com)
006 *
007 * This library is free software; you can redistribute it and/or
008 * modify it under the terms of the GNU Lesser General Public
009 * License as published by the Free Software Foundation; either
010 * version 2.1 of the License, or (at your option) any later version.
011 *
012 * This library is distributed in the hope that it will be useful,
013 * but WITHOUT ANY WARRANTY; without even the implied warranty of
014 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
015 * Lesser General Public License for more details.
016 *
017 * For further information about Alkacon Software, please see the
018 * company website: http://www.alkacon.com
019 *
020 * For further information about OpenCms, please see the
021 * project website: http://www.opencms.org
022 *
023 * You should have received a copy of the GNU Lesser General Public
024 * License along with this library; if not, write to the Free Software
025 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
026 */
027
028package org.opencms.ade.galleries.client.preview;
029
030import org.opencms.ade.galleries.client.CmsGalleryController;
031import org.opencms.ade.galleries.client.ui.CmsGalleryDialog;
032import org.opencms.ade.galleries.shared.I_CmsBinaryPreviewProvider;
033import org.opencms.gwt.client.I_CmsHasInit;
034
035import java.util.HashMap;
036import java.util.Map;
037
038/**
039 * The binary resource preview factory.<p>
040 *
041 * @since 8.0.3
042 */
043public final class CmsBinaryPreviewFactory implements I_CmsPreviewFactory, I_CmsHasInit {
044
045    /** The preview registry. */
046    private Map<String, CmsBinaryResourcePreview> m_previewRegistry;
047
048    /**
049     * Constructor.<p>
050     */
051    private CmsBinaryPreviewFactory() {
052
053        m_previewRegistry = new HashMap<String, CmsBinaryResourcePreview>();
054    }
055
056    /**
057     * Initializes this class.<p>
058     */
059    public static void initClass() {
060
061        CmsBinaryPreviewFactory factory = new CmsBinaryPreviewFactory();
062        CmsGalleryController.registerPreviewFactory(I_CmsBinaryPreviewProvider.PREVIEW_NAME, factory);
063    }
064
065    /**
066     * @see org.opencms.ade.galleries.client.preview.I_CmsPreviewFactory#getPreview(org.opencms.ade.galleries.client.ui.CmsGalleryDialog)
067     */
068    public I_CmsResourcePreview<?> getPreview(CmsGalleryDialog dialog) {
069
070        if (!m_previewRegistry.containsKey(dialog.getDialogId())) {
071            m_previewRegistry.put(dialog.getDialogId(), new CmsBinaryResourcePreview(dialog));
072        }
073        return m_previewRegistry.get(dialog.getDialogId());
074    }
075
076}