Java tutorial
/* * This library is part of OpenCms - * the Open Source Content Management System * * Copyright (c) Alkacon Software GmbH & Co. KG (http://www.alkacon.com) * * This library is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2.1 of the License, or (at your option) any later version. * * This library is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Lesser General Public License for more details. * * For further information about Alkacon Software, please see the * company website: http://www.alkacon.com * * For further information about OpenCms, please see the * project website: http://www.opencms.org * * You should have received a copy of the GNU Lesser General Public * License along with this library; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */ package org.opencms.ui.components.fileselect; import org.opencms.file.CmsObject; import org.opencms.file.CmsResource; import org.opencms.file.CmsResourceFilter; import org.opencms.main.CmsLog; import org.opencms.ui.CmsVaadinUtils; import org.opencms.ui.components.CmsFileTable; import org.opencms.ui.components.CmsResourceTableProperty; import org.opencms.ui.components.OpenCmsTheme; import org.opencms.ui.util.I_CmsItemSorter; import org.opencms.util.CmsFileUtil; import org.opencms.util.CmsUUID; import java.util.Collection; import java.util.HashSet; import java.util.List; import java.util.Set; import org.apache.commons.logging.Log; import com.google.common.base.Predicate; import com.google.common.base.Predicates; import com.google.common.collect.ComparisonChain; import com.google.common.collect.Lists; import com.vaadin.data.Container; import com.vaadin.data.Item; import com.vaadin.data.util.DefaultItemSorter; import com.vaadin.event.ItemClickEvent; import com.vaadin.event.ItemClickEvent.ItemClickListener; import com.vaadin.shared.ui.label.ContentMode; import com.vaadin.ui.Label; import com.vaadin.ui.Table; import com.vaadin.ui.Tree.CollapseEvent; import com.vaadin.ui.Tree.CollapseListener; import com.vaadin.ui.Tree.ExpandEvent; import com.vaadin.ui.Tree.ExpandListener; import com.vaadin.ui.TreeTable; import com.vaadin.ui.themes.ValoTheme; /** * Tree subclass used to display VFS resource trees.<p> */ public class CmsResourceTreeTable extends TreeTable { /** * Extends the default sorting to differentiate between files and folder when sorting by name.<p> * Also allows sorting by navPos property for the Resource icon column.<p> */ public static class FileSorter extends DefaultItemSorter implements I_CmsItemSorter { /** The serial version id. */ private static final long serialVersionUID = 1L; /** * @see org.opencms.ui.util.I_CmsItemSorter#getSortableContainerPropertyIds(com.vaadin.data.Container) */ public Collection<?> getSortableContainerPropertyIds(Container container) { Set<Object> result = new HashSet<Object>(); result.add(CAPTION_FOLDERS); result.add(CmsResourceTableProperty.PROPERTY_NAVIGATION_TEXT); return result; } /** * @see com.vaadin.data.util.DefaultItemSorter#compareProperty(java.lang.Object, boolean, com.vaadin.data.Item, com.vaadin.data.Item) */ @Override protected int compareProperty(Object propertyId, boolean sortDirection, Item item1, Item item2) { if (CAPTION_FOLDERS.equals(propertyId)) { Boolean isFolder1 = (Boolean) item1.getItemProperty(CmsResourceTableProperty.PROPERTY_IS_FOLDER) .getValue(); Boolean isFolder2 = (Boolean) item2.getItemProperty(CmsResourceTableProperty.PROPERTY_IS_FOLDER) .getValue(); String name1 = (String) (item1.getItemProperty(CmsResourceTableProperty.PROPERTY_RESOURCE_NAME) .getValue()); name1 = CmsFileUtil.removeTrailingSeparator(name1); String name2 = (String) (item2.getItemProperty(CmsResourceTableProperty.PROPERTY_RESOURCE_NAME) .getValue()); name2 = CmsFileUtil.removeTrailingSeparator(name2); return (sortDirection ? 1 : -1) * ComparisonChain.start() .compareTrueFirst(isFolder1.booleanValue(), isFolder2.booleanValue()).compare(name1, name2) .result(); } else if (CmsResourceTableProperty.PROPERTY_NAVIGATION_TEXT.equals(propertyId) && (item1.getItemProperty(CmsResourceTableProperty.PROPERTY_NAVIGATION_POSITION) != null)) { int result; Float pos1 = (Float) item1.getItemProperty(CmsResourceTableProperty.PROPERTY_NAVIGATION_POSITION) .getValue(); Float pos2 = (Float) item2.getItemProperty(CmsResourceTableProperty.PROPERTY_NAVIGATION_POSITION) .getValue(); if (pos1 == null) { result = pos2 == null ? compareProperty(CmsResourceTableProperty.PROPERTY_RESOURCE_NAME, true, item1, item2) : 1; } else { result = pos2 == null ? -1 : Float.compare(pos1.floatValue(), pos2.floatValue()); } if (!sortDirection) { result = result * (-1); } return result; } return super.compareProperty(propertyId, sortDirection, item1, item2); } } /** * The style generator.<p> */ public class StyleGenerator implements CellStyleGenerator { /** The serial version id. */ private static final long serialVersionUID = 1L; /** * @see com.vaadin.ui.Table.CellStyleGenerator#getStyle(com.vaadin.ui.Table, java.lang.Object, java.lang.Object) */ public String getStyle(Table source, Object itemId, Object propertyId) { Item item = source.getContainerDataSource().getItem(itemId); String style = CmsFileTable.getStateStyle(item); if (!isSelectable(item)) { style += " " + OpenCmsTheme.DISABLED; } if (CAPTION_FOLDERS.equals(propertyId)) { style += " o-name-column"; } else if (CmsResourceTableProperty.PROPERTY_NAVIGATION_TEXT == propertyId) { if ((item.getItemProperty(CmsResourceTableProperty.PROPERTY_IN_NAVIGATION) != null) && ((Boolean) item.getItemProperty(CmsResourceTableProperty.PROPERTY_IN_NAVIGATION) .getValue()).booleanValue()) { style += " " + OpenCmsTheme.IN_NAVIGATION; } } return style; } } /** The logger instance for this class. */ private static final Log LOG = CmsLog.getLog(CmsResourceTreeTable.class); /** Serial version id. */ private static final long serialVersionUID = 1L; /** The folder caption column id. */ public static final String CAPTION_FOLDERS = "CAPTION_FOLDERS"; /** The CMS context. */ CmsObject m_cms; /** The list of selection handlers. */ private List<I_CmsSelectionHandler<CmsResource>> m_resourceSelectionHandlers = Lists.newArrayList(); /** The root resource. */ private CmsResource m_root; /** * Predicate which can be used to prevent selection of a node (this means the select handler will not be called * if this returns false, but the Vaadin selection mechanism will still mark it as selected. */ private Predicate<Item> m_selectionFilter = Predicates.alwaysTrue(); /** * Creates a new instance.<p> * * @param cms the CMS context * @param root the root resource * @param filter the resource filter */ public CmsResourceTreeTable(CmsObject cms, CmsResource root, CmsResourceFilter filter) { this(cms, root, new CmsResourceTreeContainer(filter)); } /** * Creates a new instance.<p> * * @param cms the CMS context * @param root the root resource * @param container the data container for the tree */ public CmsResourceTreeTable(CmsObject cms, CmsResource root, CmsResourceTreeContainer container) { m_cms = cms; m_root = root; FileSorter sorter = new FileSorter(); sorter.setSortProperties(container, new Object[] { CAPTION_FOLDERS, CmsResourceTableProperty.PROPERTY_NAVIGATION_TEXT }, new boolean[] { true, true }); container.setItemSorter(sorter); setContainerDataSource(container); ColumnGenerator captionGenerator = new ColumnGenerator() { private static final long serialVersionUID = 1L; public Object generateCell(Table source, Object itemId, Object columnId) { if (CAPTION_FOLDERS.equals(columnId)) { String html = (String) source.getContainerDataSource().getItem(itemId) .getItemProperty(CmsResourceTableProperty.PROPERTY_TREE_CAPTION).getValue(); Label label = new Label(html, ContentMode.HTML); label.setStyleName("o-tree-table-caption"); return label; } else { return null; } } }; addGeneratedColumn(CAPTION_FOLDERS, captionGenerator); setVisibleColumns(CAPTION_FOLDERS, CmsResourceTableProperty.PROPERTY_NAVIGATION_TEXT); setItemCaptionPropertyId(CAPTION_FOLDERS); setColumnHeader(CmsResourceTableProperty.PROPERTY_NAVIGATION_TEXT, CmsVaadinUtils.getMessageText(CmsResourceTableProperty.PROPERTY_NAVIGATION_TEXT.getHeaderKey())); setColumnHeader(CAPTION_FOLDERS, CmsVaadinUtils.getMessageText(CmsResourceTableProperty.PROPERTY_RESOURCE_NAME.getHeaderKey())); // hide vertical and horizontal lines and disable alternating row background addStyleName(ValoTheme.TABLE_NO_STRIPES); addStyleName(ValoTheme.TABLE_NO_HORIZONTAL_LINES); addExpandListener(new ExpandListener() { private static final long serialVersionUID = 1L; public void nodeExpand(ExpandEvent event) { getTreeContainer().readTreeLevel(m_cms, (CmsUUID) event.getItemId()); getTreeContainer().updateSort(); markAsDirtyRecursive(); // required so open / close arrows on folders without contents are rendered correctly } }); addCollapseListener(new CollapseListener() { private static final long serialVersionUID = 1L; public void nodeCollapse(CollapseEvent event) { getTreeContainer().removeChildren((CmsUUID) event.getItemId()); } }); addItemClickListener(new ItemClickListener() { private static final long serialVersionUID = 1L; public void itemClick(ItemClickEvent event) { if (isSelectable(event.getItem())) { CmsResource resource = (CmsResource) (event.getItem() .getItemProperty(CmsResourceTreeContainer.PROPERTY_RESOURCE).getValue()); handleSelection(resource); } } }); setCellStyleGenerator(new StyleGenerator()); getTreeContainer().addTreeItem(cms, m_root, null); try { setCollapsed(m_root.getStructureId(), false); markAsDirtyRecursive(); } catch (Exception e) { LOG.error(e.getLocalizedMessage(), e); } } /** * Adds a resource selection handler.<p> * * @param handler the resource selection handler */ public void addResourceSelectionHandler(I_CmsSelectionHandler<CmsResource> handler) { m_resourceSelectionHandlers.add(handler); } /** * Expands the item with the given id.<p> * * @param itemId the item id */ public void expandItem(CmsUUID itemId) { setCollapsed(itemId, false); } /** * Gets the tree container.<p> * * @return the tree container */ public CmsResourceTreeContainer getTreeContainer() { return (CmsResourceTreeContainer) getContainerDataSource(); } /** * Removes the given resource selection handler.<p> * * @param handler the resource selection handler */ public void removeResourceSelectionHandler(I_CmsSelectionHandler<CmsResource> handler) { m_resourceSelectionHandlers.remove(handler); } /** * Sets the selection filter, a predicate that, by returning false for an item, can veto a tree entry selection.<p> * * @param selectionFilter the selection filter */ public void setSelectionFilter(Predicate<Item> selectionFilter) { m_selectionFilter = selectionFilter; } /** * Shows the sitemap view.<p> * * @param showSitemap <code>true</code> to show the sitemap view */ public void showSitemapView(boolean showSitemap) { if (showSitemap) { setSortContainerPropertyId(CmsResourceTableProperty.PROPERTY_NAVIGATION_TEXT); setSortAscending(true); } else { setSortContainerPropertyId(CAPTION_FOLDERS); setSortAscending(true); } } /** * Handles resource selection.<p> * * @param resource the selected resource */ void handleSelection(CmsResource resource) { for (I_CmsSelectionHandler<CmsResource> handler : m_resourceSelectionHandlers) { handler.onSelection(resource); } } /** * Returns whether the given item is selectable.<p> * * @param item the item to check * * @return <code>true</code> if the given item is selectable */ boolean isSelectable(Item item) { return m_selectionFilter.apply(item); } }