cmsdownloadbrowser.java

java 编写的程序

        for(int i = 0;i < numFolders;i++) {
            CmsResource currFolder = (CmsResource)folders.elementAt(i);
            String name = currFolder.getName();
            if(chosenFolder.equals(currFolder.getAbsolutePath())) {
                ret = i;
            }
            values.addElement(currFolder.getAbsolutePath());
            names.addElement(name);
        }
        return new Integer(ret);
    }

    /**
     * From interface <code>I_CmsFileListUsers</code>.
     * <P>
     * Collects all files in the chosen download gallery list.
     * @param cms The CmsObject.
     * @return A vector of folder and file objects.
     * @exception Throws CmsException if something goes wrong.
     */

    public Vector getFiles(CmsObject cms) throws CmsException {
        I_CmsSession session = cms.getRequestContext().getSession(true);
        Vector files = new Vector();

        // get the list of filtered files from session
        Vector filteredFiles = (Vector)session.getValue("_DOWNLIST_");
        int numFiles = filteredFiles.size();

        // Get limits for the requested page
        String pageText = (String)session.getValue(C_PARA_PAGE);
        if(pageText == null || "".equals(pageText)) {
            pageText = "1";
        }
        int page = new Integer(pageText).intValue();
        int from = (page - 1) * C_DOWNBROWSER_MAXENTRIES;
        int to = ((from + C_DOWNBROWSER_MAXENTRIES) > numFiles) ? numFiles : (from + C_DOWNBROWSER_MAXENTRIES);
        String folder = (String)session.getValue(C_PARA_FOLDER);
        if(folder == null || "".equals(folder)) {
            folder = getConfigFile(cms).getDownGalleryPath();
            Vector galleries = cms.getSubFolders(folder);
            if(galleries.size() > 0) {

                // take the first gallery if none was chosen
                folder = ((CmsResource)galleries.elementAt(0)).getAbsolutePath();
            }
            session.putValue(C_PARA_FOLDER, folder);
        }

        // Generate the download list for all files on the selected page
        for(int i = from;i < to;i++) {
            CmsResource currFile = (CmsResource)filteredFiles.elementAt(i);
            files.addElement(currFile);
        }
        return files;
    }

    /**
     * Internal method for getting a vector of all files that match a given filter
     * i.e., <code>filter</code> is a substring of the name or the title
     *
     * @param cms Cms object for accessing system resources.
     * @param folder Folder to look for files.
     * @param filter Search pattern that should be used.
     * @return Vector of CmsFile objects.
     */

    private Vector getFilteredDownList(CmsObject cms, String folder, String filter)
            throws CmsException {

        // Get all pictures in the given folder using the cms object
        Vector allFiles = cms.getFilesInFolder(folder);

        // Filter the files
        Vector filteredFiles = new Vector();
        for(int i = 0;i < allFiles.size();i++) {
            CmsFile file = (CmsFile)allFiles.elementAt(i);
            String filename = file.getName();
            String title = cms.readProperty(file.getAbsolutePath(), C_PROPERTY_TITLE);
            boolean filenameFilter = inFilter(filename, filter);
            boolean titleFilter = ((title == null) || ("".equals(title))) ? false : inFilter(title, filter);
            if(filenameFilter || titleFilter) {
                filteredFiles.addElement(file);
            }
        }
        return filteredFiles;
    }

    /**
     * Checks, if the given filename matches the filter.
     * @param filename filename to be checked.
     * @param filter filter to be checked.
     * @return <code>true</code> if the filename matches the filter, <code>false</code> otherwise.
     */

    private boolean inFilter(String name, String filter) {
        String compareName = name.toLowerCase();
        String compareFilter = filter.toLowerCase();
        if("".equals(compareFilter) || (compareName.indexOf(compareFilter) != -1)) {
            return true;
        }
        else {
            return false;
        }
    }

    /**
     * Indicates if the results of this class are cacheable.
     *
     * @param cms CmsObject Object for accessing system resources
     * @param templateFile Filename of the template file
     * @param elementName Element name of this template in our parent template.
     * @param parameters Hashtable with all template class parameters.
     * @param templateSelector template section that should be processed.
     * @return <EM>true</EM> if cacheable, <EM>false</EM> otherwise.
     */

    public boolean isCacheable(CmsObject cms, String templateFile, String elementName,
            Hashtable parameters, String templateSelector) {
        return false;
    }

    /**
     * From interface <code>I_CmsFileListUsers</code>.
     * <P>
     * Used to modify the bit pattern for hiding and showing columns in
     * the file list.
     * @param cms Cms object for accessing system resources.
     * @param prefs Old bit pattern.
     * @return New modified bit pattern.
     * @see I_CmsFileListUsers
     */

    public int modifyDisplayedColumns(CmsObject cms, int prefs) {

        // not display the following columns
        prefs = ((prefs & C_FILELIST_NAME) == 0) ? prefs : (prefs - C_FILELIST_NAME);
        prefs = ((prefs & C_FILELIST_TITLE) == 0) ? prefs : (prefs - C_FILELIST_TITLE);
        prefs = ((prefs & C_FILELIST_OWNER) == 0) ? prefs : (prefs - C_FILELIST_OWNER);
        prefs = ((prefs & C_FILELIST_GROUP) == 0) ? prefs : (prefs - C_FILELIST_GROUP);
        prefs = ((prefs & C_FILELIST_ACCESS) == 0) ? prefs : (prefs - C_FILELIST_ACCESS);
        prefs = ((prefs & C_FILELIST_STATE) == 0) ? prefs : (prefs - C_FILELIST_STATE);
        prefs = ((prefs & C_FILELIST_LOCKED) == 0) ? prefs : (prefs - C_FILELIST_LOCKED);
        return prefs;
    }

    /**
     * Used by the workplace "back" button to decide whether the icon should
     * be activated or not. A button will use this method if the attribute <code>method="showBackButton"</code>
     * is defined in the <code>&lt;BUTTON&gt;</code> tag.
     * <P>
     * This method returns <code>false</code> if the currently displayed page is
     * the first page.
     *
     * @param cms CmsObject Object for accessing system resources <em>(not used here)</em>.
     * @param lang reference to the currently valid language file <em>(not used here)</em>.
     * @param parameters Hashtable containing all user parameters <em>(not used here)</em>.
     * @return <code>true</code> if the button should be enabled, <code>false</code> otherwise.
     */

    public Boolean showBackButton(CmsObject cms, CmsXmlLanguageFile lang,
            Hashtable parameters) {

        // Get the current page number
        String pageText = (String)parameters.get(C_PARA_PAGE);
        int page = new Integer(pageText).intValue();
        return new Boolean(page > 1);
    }

    /**
     * Used by the workplace "next" button to decide whether the icon should
     * be activated or not. A button will use this method if the attribute <code>method="showNextButton"</code>
     * is defined in the <code>&lt;BUTTON&gt;</code> tag.
     * <P>
     * This method returns <code>false</code> if the currently displayed page is
     * the last page.
     *
     * @param cms CmsObject Object for accessing system resources <em>(not used here)</em>.
     * @param lang reference to the currently valid language file <em>(not used here)</em>.
     * @param parameters Hashtable containing all user parameters <em>(not used here)</em>.
     * @return <code>true</code> if the button should be enabled, <code>false</code> otherwise.
     */

    public Boolean showNextButton(CmsObject cms, CmsXmlLanguageFile lang,
            Hashtable parameters) {
        I_CmsSession session = cms.getRequestContext().getSession(true);

        // Get the current page number
        String pageText = (String)parameters.get(C_PARA_PAGE);
        int page = new Integer(pageText).intValue();

        // get the number of pics
        int numFiles = ((Integer)session.getValue("numfiles")).intValue();

        // Get the maximum page number
        int maxpage = ((numFiles - 1) / C_DOWNBROWSER_MAXENTRIES) + 1;
        return new Boolean(page < maxpage);
    }
}