Java tutorial
/* * This library is part of OpenCms - * the Open Source Content Management System * * Copyright (c) Alkacon Software GmbH (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 GmbH, 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.workplace.explorer; import org.opencms.db.CmsUserSettings; import org.opencms.file.CmsFolder; import org.opencms.file.CmsObject; import org.opencms.file.CmsProject; import org.opencms.file.CmsResource; import org.opencms.file.CmsResourceFilter; import org.opencms.file.collectors.I_CmsResourceCollector; import org.opencms.file.types.CmsResourceTypePlain; import org.opencms.i18n.CmsEncoder; import org.opencms.jsp.CmsJspActionElement; import org.opencms.loader.CmsLoaderException; import org.opencms.main.CmsException; import org.opencms.main.CmsLog; import org.opencms.main.CmsRuntimeException; import org.opencms.main.OpenCms; import org.opencms.util.CmsRequestUtil; import org.opencms.util.CmsStringUtil; import org.opencms.workplace.CmsFrameset; import org.opencms.workplace.CmsWorkplace; import org.opencms.workplace.CmsWorkplaceSettings; import org.opencms.workplace.galleries.A_CmsAjaxGallery; import org.opencms.workplace.list.I_CmsListResourceCollector; import org.opencms.workplace.tools.CmsToolManager; import java.util.Collections; import java.util.List; import java.util.Scanner; import javax.servlet.http.HttpServletRequest; import org.apache.commons.logging.Log; /** * Provides methods for building the main frame sets of the OpenCms Workplace.<p> * * The following files use this class: * <ul> * <li>/views/explorer/explorer_fs.jsp * <li>/views/explorer/explorer_files.jsp * <li>/views/explorer/explorer_body_fs.jsp * </ul> * <p> * * @since 6.0.0 */ public class CmsExplorer extends CmsWorkplace { /** The "mode" parameter. */ public static final String PARAMETER_MODE = "mode"; /** The "explorerview" view selection. */ public static final String VIEW_EXPLORER = "explorerview"; /** The "galleryview" view selection. */ public static final String VIEW_GALLERY = "galleryview"; /** The "list" view selection. */ public static final String VIEW_LIST = "listview"; /** The log object for this class. */ private static final Log LOG = CmsLog.getLog(CmsExplorer.class); /** The "flaturl" parameter. */ private static final String PARAMETER_FLATURL = "flaturl"; /** The "page" parameter. */ private static final String PARAMETER_PAGE = "page"; /** The "resource" parameter. */ private static final String PARAMETER_RESOURCE = "resource"; /** The "uri" parameter. */ private static final String PARAMETER_URI = "uri"; /** The 'uri' parameter value. */ private String m_uri; /** * Public constructor.<p> * * @param jsp an initialized JSP action element */ public CmsExplorer(CmsJspActionElement jsp) { super(jsp); } /** * Creates a link for the OpenCms workplace that will reload the whole workplace, switch to the explorer view, the * site of the given explorerRootPath and show the folder given in the explorerRootPath. * <p> * * @param jsp * needed for link functionality. * * @param explorerRootPath * a root relative folder link (has to end with '/'). * * @return a link for the OpenCms workplace that will reload the whole workplace, switch to the explorer view, the * site of the given explorerRootPath and show the folder given in the explorerRootPath. */ public static String getWorkplaceExplorerLink(final CmsJspActionElement jsp, final String explorerRootPath) { return getWorkplaceExplorerLink(jsp.getCmsObject(), explorerRootPath); } /** * Creates a link for the OpenCms workplace that will reload the whole workplace, switch to the explorer view, the * site of the given explorerRootPath and show the folder given in the explorerRootPath. * <p> * * @param cms * the cms object * * @param explorerRootPath * a root relative folder link (has to end with '/'). * * @return a link for the OpenCms workplace that will reload the whole workplace, switch to the explorer view, the * site of the given explorerRootPath and show the folder given in the explorerRootPath. */ public static String getWorkplaceExplorerLink(final CmsObject cms, final String explorerRootPath) { // split the root site: StringBuffer siteRoot = new StringBuffer(); StringBuffer path = new StringBuffer('/'); Scanner scanner = new Scanner(explorerRootPath); scanner.useDelimiter("/"); int count = 0; while (scanner.hasNext()) { if (count < 2) { siteRoot.append('/').append(scanner.next()); } else { if (count == 2) { path.append('/'); } path.append(scanner.next()); path.append('/'); } count++; } String targetSiteRoot = siteRoot.toString(); String targetVfsFolder = path.toString(); // build the link StringBuilder link2Source = new StringBuilder(); link2Source.append("/system/workplace/views/workplace.jsp?"); link2Source.append(CmsWorkplace.PARAM_WP_EXPLORER_RESOURCE); link2Source.append("="); link2Source.append(targetVfsFolder); link2Source.append("&"); link2Source.append(CmsFrameset.PARAM_WP_VIEW); link2Source.append("="); link2Source.append(OpenCms.getLinkManager().substituteLinkForUnknownTarget(cms, "/system/workplace/views/explorer/explorer_fs.jsp")); link2Source.append("&"); link2Source.append(CmsWorkplace.PARAM_WP_SITE); link2Source.append("="); link2Source.append(targetSiteRoot); String result = link2Source.toString(); result = OpenCms.getLinkManager().substituteLinkForUnknownTarget(cms, result); return result; } /** * Returns the explorer body frame content uri.<p> * * Used by the explorer_fs.jsp.<p> * * @return the explorer body frame content uri */ public String getExplorerBodyUri() { String body = CmsWorkplace.VFS_PATH_VIEWS + "explorer/explorer_body_fs.jsp"; if (CmsStringUtil.isNotEmptyOrWhitespaceOnly(m_uri)) { body += "?" + PARAMETER_URI + "=" + m_uri; } return getJsp().link(body); } /** * Returns the explorer files frame content uri.<p> * * Used by the explorer_body_fs.jsp.<p> * * @return the explorer files frame content uri */ public String getExplorerFilesUri() { String body = "explorer_files.jsp?mode=explorerview"; if (CmsStringUtil.isNotEmptyOrWhitespaceOnly(m_uri)) { body = m_uri; } return getJsp().link(body); } /** * Returns the html for the explorer file list.<p> * * @return the html for the explorer file list */ public String getFileList() { // if mode is "listonly", only the list will be shown boolean galleryView = VIEW_GALLERY.equals(getSettings().getExplorerMode()); // if mode is "listview", all file in the set collector will be shown boolean listView = VIEW_LIST.equals(getSettings().getExplorerMode()); String currentFolder = getSettings().getExplorerResource(); try { getCms().readResource(currentFolder, CmsResourceFilter.ALL); } catch (CmsException e) { // file was not readable currentFolder = "/"; } // start creating content StringBuffer content = new StringBuffer(2048); content.append(getInitializationHeader()); // now get the entries for the file list List<CmsResource> resources = getResources(getSettings().getExplorerResource()); // if a folder contains to much entries we split them to pages of C_ENTRYS_PER_PAGE length int startat = 0; int stopat = resources.size(); int selectedPage = 1; int numberOfPages = 0; int maxEntrys = getSettings().getUserSettings().getExplorerFileEntries(); if (!galleryView) { selectedPage = getSettings().getExplorerPage(); if (stopat > maxEntrys) { // we have to split numberOfPages = ((stopat - 1) / maxEntrys) + 1; if (selectedPage > numberOfPages) { // the user has changed the folder and then selected a page for the old folder selectedPage = 1; } startat = (selectedPage - 1) * maxEntrys; if ((startat + maxEntrys) < stopat) { stopat = startat + maxEntrys; } } } // now check which file list columns we want to show int preferences = getUserPreferences(); boolean showTitle = (preferences & CmsUserSettings.FILELIST_TITLE) > 0; boolean showNavText = (preferences & CmsUserSettings.FILELIST_NAVTEXT) > 0; boolean showPermissions = (preferences & CmsUserSettings.FILELIST_PERMISSIONS) > 0; boolean showDateLastModified = (preferences & CmsUserSettings.FILELIST_DATE_LASTMODIFIED) > 0; boolean showUserWhoLastModified = (preferences & CmsUserSettings.FILELIST_USER_LASTMODIFIED) > 0; boolean showDateCreated = (preferences & CmsUserSettings.FILELIST_DATE_CREATED) > 0; boolean showUserWhoCreated = (preferences & CmsUserSettings.FILELIST_USER_CREATED) > 0; boolean showDateReleased = (preferences & CmsUserSettings.FILELIST_DATE_RELEASED) > 0; boolean showDateExpired = (preferences & CmsUserSettings.FILELIST_DATE_EXPIRED) > 0; boolean fullPath = galleryView || listView; // set the right reference project CmsProject referenceProject; try { if (!listView) { referenceProject = getCms().readProject(getSettings().getProject()); } else { referenceProject = getCms().readProject(getSettings().getExplorerProjectId()); } } catch (CmsException ex) { referenceProject = getCms().getRequestContext().getCurrentProject(); } CmsResourceUtil resUtil = new CmsResourceUtil(getCms()); resUtil.setReferenceProject(referenceProject); for (int i = startat; i < stopat; i++) { CmsResource res = resources.get(i); resUtil.setResource(res); content.append(getInitializationEntry(resUtil, fullPath, showTitle, showNavText, showPermissions, showDateLastModified, showUserWhoLastModified, showDateCreated, showUserWhoCreated, showDateReleased, showDateExpired)); } content.append(getInitializationFooter(numberOfPages, selectedPage)); return content.toString(); } /** * Generates a resource entry for the explorer initialization code.<p> * * @param resUtil the resource util object to generate the entry for * @param showPath if the path should be given or taken from <code>top.setDirectory</code> * @param showTitle if the title should be shown * @param showNavText if the navtext should be shown * @param showPermissions if the permissions should be shown * @param showDateLastModified if the date of modification should be shown * @param showUserWhoLastModified if the user who last modified the resource should be shown * @param showDateCreated if the date of creation should be shown * @param showUserWhoCreated if the user who created the resource should be shown * @param showDateReleased if the date of release should be shown * @param showDateExpired if the date of expiration should be shown * * @return js code for initializing the explorer view * * @see #getInitializationHeader() * @see #getInitializationFooter(int, int) */ public String getInitializationEntry(CmsResourceUtil resUtil, boolean showPath, boolean showTitle, boolean showNavText, boolean showPermissions, boolean showDateLastModified, boolean showUserWhoLastModified, boolean showDateCreated, boolean showUserWhoCreated, boolean showDateReleased, boolean showDateExpired) { CmsResource resource = resUtil.getResource(); String path = getCms().getSitePath(resource); StringBuffer content = new StringBuffer(2048); content.append("top.aF("); // position 1: name content.append("\""); content.append(resource.getName()); content.append("\","); // position 2: path if (showPath) { content.append("\""); content.append(path); content.append("\","); } else { //is taken from top.setDirectory content.append("\"\","); } // position 3: title if (showTitle) { String title = resUtil.getTitle(); content.append("\""); content.append(CmsEncoder.escapeWBlanks(CmsEncoder.escapeXml(title), CmsEncoder.ENCODING_UTF_8)); content.append("\","); } else { content.append("\"\","); } // position 4: navigation text if (showNavText) { String navText = resUtil.getNavText(); content.append("\""); content.append(CmsEncoder.escapeWBlanks(CmsEncoder.escapeXml(navText), CmsEncoder.ENCODING_UTF_8)); content.append("\","); } else { content.append("\"\","); } // position 5: type content.append(resUtil.getResourceTypeId()); content.append(","); // position 6: link type content.append(resUtil.getLinkType()); content.append(","); // position 7: size content.append(resource.getLength()); content.append(","); // position 8: state content.append(resource.getState()); content.append(","); // position 9: layout style content.append(resUtil.getTimeWindowLayoutType()); content.append(','); // position 10: date of last modification if (showDateLastModified) { content.append("\""); content.append(getMessages().getDateTime(resource.getDateLastModified())); content.append("\","); } else { content.append("\"\","); } // position 11: user who last modified the resource if (showUserWhoLastModified) { content.append("\""); content.append(resUtil.getUserLastModified()); content.append("\","); } else { content.append("\"\","); } // position 12: date of creation if (showDateCreated) { content.append("\""); content.append(getMessages().getDateTime(resource.getDateCreated())); content.append("\","); } else { content.append("\"\","); } // position 13: user who created the resource if (showUserWhoCreated) { content.append("\""); content.append(resUtil.getUserCreated()); content.append("\","); } else { content.append("\"\","); } // position 14: date of release if (showDateReleased) { content.append("\""); content.append(resUtil.getDateReleased()); content.append("\","); } else { content.append("\"\","); } // position 15: date of expiration if (showDateExpired) { content.append("\""); content.append(resUtil.getDateExpired()); content.append("\","); } else { content.append("\"\","); } // position 16: permissions if (showPermissions) { content.append("\""); content.append(CmsStringUtil.escapeJavaScript(resUtil.getPermissionString())); content.append("\","); } else { content.append("\"\","); } // position 17: locked by content.append("\""); content.append(CmsStringUtil.escapeJavaScript(resUtil.getLockedByName())); content.append("\","); // position 18: name of project where the resource is locked in content.append("\""); content.append(resUtil.getLockedInProjectName()); content.append("\","); // position 19: id of project where resource belongs to int lockState = resUtil.getLockState(); content.append(lockState); content.append(",\""); // position 20: project state, I=resource is inside current project, O=resource is outside current project if (resUtil.isInsideProject()) { content.append("I"); } else { content.append("O"); } content.append("\",\""); // position 21: system lock info, used as text for tool tip content.append(resUtil.getSystemLockInfo(true)); content.append("\", "); // position 22: project state content.append(resUtil.getProjectState().getMode()); // finish content.append(");\n"); return content.toString(); } /** * Generates the footer of the explorer initialization code.<p> * * @param numberOfPages the number of pages * @param selectedPage the selected page to display * * @return js code for initializing the explorer view * * @see #getInitializationHeader() * @see #getInitializationEntry(CmsResourceUtil, boolean, boolean, boolean, boolean, boolean, boolean, boolean, boolean, boolean, boolean) */ public String getInitializationFooter(int numberOfPages, int selectedPage) { StringBuffer content = new StringBuffer(1024); content.append("top.dU(document,"); content.append(numberOfPages); content.append(","); content.append(selectedPage); content.append("); \n"); // display eventual error message if (getSettings().getErrorMessage() != null) { // display error message as JavaScript alert content.append("alert(\""); content.append(CmsStringUtil.escapeJavaScript(getSettings().getErrorMessage().key(getLocale()))); content.append("\");\n"); // delete error message container in settings getSettings().setErrorMessage(null); } // display eventual broadcast message(s) String message = getBroadcastMessageString(); if (CmsStringUtil.isNotEmpty(message)) { // display broadcast as JavaScript alert content.append("alert(decodeURIComponent(\""); // the user has pending messages, display them all content.append(CmsEncoder.escapeWBlanks(message, CmsEncoder.ENCODING_UTF_8)); content.append("\"));\n"); } content.append("}\n"); return content.toString(); } /** * Generates the header of the initialization code.<p> * * @return js code for initializing the explorer view * * @see #getInitializationFooter(int, int) * @see #getInitializationEntry(CmsResourceUtil, boolean, boolean, boolean, boolean, boolean, boolean, boolean, boolean, boolean, boolean) */ public String getInitializationHeader() { // if mode is "listview", all file in the set collector will be shown boolean listView = VIEW_LIST.equals(getSettings().getExplorerMode()); String currentResourceName = getSettings().getExplorerResource(); CmsResource currentResource = null; try { currentResource = getCms().readResource(currentResourceName, CmsResourceFilter.ALL); } catch (CmsException e) { // file was not readable } if (currentResource == null) { // show the root folder in case of an error and reset the state currentResourceName = "/"; try { currentResource = getCms().readResource(currentResourceName, CmsResourceFilter.ALL); } catch (CmsException e) { // should usually never happen LOG.error(e.getLocalizedMessage(), e); throw new CmsRuntimeException(e.getMessageContainer(), e); } } StringBuffer content = new StringBuffer(1024); content.append("function initialize() {\n"); content.append("top.setRootFolder(\""); String rootFolder = getRootFolder(); content.append(rootFolder); content.append("\");\n"); content.append("top.mode=\""); content.append(getSettings().getExplorerMode()); content.append("\";\n"); // the resource id of plain resources content.append("top.plainresid="); int plainId; try { plainId = OpenCms.getResourceManager().getResourceType(CmsResourceTypePlain.getStaticTypeName()) .getTypeId(); } catch (CmsLoaderException e) { // this should really never happen plainId = CmsResourceTypePlain.getStaticTypeId(); } content.append(plainId); content.append(";\n"); // the auto lock setting content.append("top.autolock="); content.append(OpenCms.getWorkplaceManager().autoLockResources()); content.append(";\n"); // the button type setting content.append("top.buttonType="); content.append(getSettings().getUserSettings().getExplorerButtonStyle()); content.append(";\n"); // the help_url content.append("top.head.helpUrl='explorer/index.html';\n"); // the project content.append("top.setProject('"); if (!listView) { content.append(getSettings().getProject()); } else { content.append(getSettings().getExplorerProjectId()); } content.append("');\n"); // the onlineProject content.append("top.setOnlineProject('"); content.append(CmsProject.ONLINE_PROJECT_ID); content.append("');\n"); // set the writeAccess for the current Folder boolean writeAccess = VIEW_EXPLORER.equals(getSettings().getExplorerMode()); if (writeAccess) { writeAccess = getCms().isInsideCurrentProject(currentResourceName); } content.append("top.enableNewButton("); content.append(writeAccess); content.append(");\n"); // the folder String siteFolderPath = CmsResource .getFolderPath(getCms().getRequestContext().removeSiteRoot(currentResource.getRootPath())); if (OpenCms.getSiteManager().startsWithShared(siteFolderPath) && OpenCms.getSiteManager().startsWithShared(getCms().getRequestContext().getSiteRoot())) { siteFolderPath = siteFolderPath.substring(OpenCms.getSiteManager().getSharedFolder().length() - 1); } content.append("top.setDirectory(\""); content.append(CmsResource.getFolderPath(currentResource.getRootPath())); content.append("\",\""); content.append(siteFolderPath); content.append("\");\n"); content.append("top.rD();\n"); //unchecked cast to List<String> @SuppressWarnings("unchecked") List<String> reloadTreeFolders = (List<String>) getJsp().getRequest() .getAttribute(REQUEST_ATTRIBUTE_RELOADTREE); if (reloadTreeFolders != null) { // folder tree has to be reloaded after copy, delete, move, rename operation String reloadFolder = ""; for (int i = 0; i < reloadTreeFolders.size(); i++) { reloadFolder = reloadTreeFolders.get(i); if (getSettings().getUserSettings().getRestrictExplorerView()) { // in restricted view, adjust folder path to reload: remove restricted folder name if (reloadFolder.length() >= rootFolder.length()) { reloadFolder = reloadFolder.substring(rootFolder.length() - 1); } } content.append("top.addNodeToLoad(\"" + reloadFolder + "\");\n"); } content.append("top.reloadNodeList();\n"); } content.append("\n"); return content.toString(); } /** * Determines the root folder of the current tree dependent on users setting of explorer view restriction.<p> * * @return the root folder resource name to display */ public String getRootFolder() { String folder = "/"; if (getSettings().getUserSettings().getRestrictExplorerView()) { folder = getSettings().getUserSettings().getStartFolder(); } try { getCms().readFolder(folder, CmsResourceFilter.IGNORE_EXPIRATION); return folder; } catch (CmsException e) { // should usually never happen if (LOG.isInfoEnabled()) { LOG.info(e); } return "/"; } } /** * @see org.opencms.workplace.CmsWorkplace#initWorkplaceRequestValues(org.opencms.workplace.CmsWorkplaceSettings, javax.servlet.http.HttpServletRequest) */ @Override protected void initWorkplaceRequestValues(CmsWorkplaceSettings settings, HttpServletRequest request) { String currentResource = request.getParameter(PARAMETER_RESOURCE); String mode = request.getParameter(PARAMETER_MODE); if (CmsStringUtil.isNotEmpty(mode)) { settings.setExplorerMode(mode); } else { // null argument, use explorer view if no other view currently specified if (!(VIEW_GALLERY.equals(settings.getExplorerMode()) || VIEW_LIST.equals(settings.getExplorerMode()))) { settings.setExplorerMode(VIEW_EXPLORER); } } m_uri = request.getParameter(PARAMETER_URI); if (CmsStringUtil.isNotEmpty(currentResource) && folderExists(getCms(), currentResource)) { // resource is a folder, set resource name settings.setExplorerResource(currentResource, getCms()); } else { // other cases (resource null, no folder), first get the resource name from settings currentResource = settings.getExplorerResource(); if (!resourceExists(getCms(), currentResource)) { // resource does not exist, display root folder settings.setExplorerResource("/", getCms()); } } String selectedPage = request.getParameter(PARAMETER_PAGE); if (selectedPage != null) { int page = 1; try { page = Integer.parseInt(selectedPage); } catch (NumberFormatException e) { // default is 1 if (LOG.isInfoEnabled()) { LOG.info(e); } } settings.setExplorerPage(page); } if (getSettings().getExplorerMode().equals(CmsExplorer.VIEW_EXPLORER)) { // reset the startup URI, so that it is not displayed again on reload of the frame set getSettings().setViewStartup(null); } // if in explorer list view if (getSettings().getExplorerMode().equals(CmsExplorer.VIEW_LIST)) { // if no other view startup url has been set if (getSettings().getViewStartup() == null) { // if not in the admin view if (getSettings().getViewUri().indexOf(CmsToolManager.ADMINVIEW_ROOT_LOCATION) < 0) { // set the view startup url as editor close link! String uri = CmsToolManager.VIEW_JSPPAGE_LOCATION; uri = CmsRequestUtil.appendParameter(CmsWorkplace.VFS_PATH_VIEWS + "explorer/explorer_fs.jsp", "uri", CmsEncoder.encode(CmsEncoder.encode(uri))); getSettings().setViewStartup(getJsp().link(uri)); } } } // the flat url settings.setExplorerFlaturl(request.getParameter(PARAMETER_FLATURL)); } /** * Checks if a folder with a given name exits in the VFS.<p> * * @param cms the current cms context * @param folder the folder to check for * @return true if the folder exists in the VFS */ private boolean folderExists(CmsObject cms, String folder) { try { CmsFolder test = cms.readFolder(folder, CmsResourceFilter.IGNORE_EXPIRATION); if (test.isFile()) { return false; } return true; } catch (Exception e) { return false; } } /** * Returns a list resources that should be displayed in the * OpenCms Explorer.<p> * * How the list is build depends on the current Workplace settings * of the user. * * @param resource the resource to read the files from (usually a folder) * @return a list of resources to display */ private List<CmsResource> getResources(String resource) { if (VIEW_LIST.equals(getSettings().getExplorerMode())) { // check if the list must show the list view or the check content view I_CmsResourceCollector collector = getSettings().getCollector(); if (collector != null) { // is this the collector for the list view if (collector instanceof I_CmsListResourceCollector) { ((I_CmsListResourceCollector) collector).setPage(getSettings().getExplorerPage()); } try { return collector.getResults(getCms()); } catch (CmsException e) { if (LOG.isInfoEnabled()) { LOG.info(e); } } } return Collections.emptyList(); } else if (VIEW_GALLERY.equals(getSettings().getExplorerMode())) { // select galleries A_CmsAjaxGallery gallery = A_CmsAjaxGallery.createInstance(getSettings().getGalleryType(), getJsp()); return gallery.getGalleries(); } else { // default is to return a list of all files in the folder try { return getCms().getResourcesInFolder(resource, CmsResourceFilter.ONLY_VISIBLE); } catch (CmsException e) { // should usually never happen if (LOG.isInfoEnabled()) { LOG.info(e); } return Collections.emptyList(); } } } /** * Sets the default preferences for the current user if those values are not available.<p> * * @return the integer value of the default preferences */ private int getUserPreferences() { CmsUserSettings settings = new CmsUserSettings(getCms()); return settings.getExplorerSettings(); } /** * Checks if a resource with a given name exits in the VFS.<p> * * @param cms the current cms context * @param resource the resource to check for * * @return true if the resource exists in the VFS */ private boolean resourceExists(CmsObject cms, String resource) { try { cms.readResource(resource, CmsResourceFilter.ALL); return true; } catch (CmsException e) { return false; } } }