cmsundochanges.java

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        }
        result.append(dialogSpacer());
        result.append(key(Messages.GUI_UNDO_CONFIRMATION_0));
        if (isMoved || isOperationOnFolder()) {
            // show undo move option if both options are available
            result.append(dialogSpacer());
            result.append("<input type=\"checkbox\" name=\"");
            result.append(PARAM_MOVE);
            result.append("\" value=\"true\" checked='checked'>&nbsp;");
            if (isMultiOperation()) {
                result.append(key(Messages.GUI_UNDO_CHANGES_MOVE_MULTI_SUBRESOURCES_0));
            } else {
                result.append(key(Messages.GUI_UNDO_CHANGES_MOVE_SUBRESOURCES_0));
            }
        } else {
            if (isMoved) {
                result.append(dialogSpacer());
                result.append("<input type=\"hidden\" name=\"");
                result.append(PARAM_MOVE);
                result.append("\" value=\"true\">&nbsp;");
            }
        }
        if (isOperationOnFolder()) {
            // show recursive option if folder(s) is/are selected
            result.append(dialogSpacer());
            result.append(dialogBlockStart(key(Messages.GUI_UNDO_CHANGES_RECURSIVE_TITLE_0)));
            result.append("<input type=\"checkbox\" name=\"");
            result.append(PARAM_RECURSIVE);
            result.append("\" value=\"true\">&nbsp;");
            if (isMultiOperation()) {
                result.append(key(Messages.GUI_UNDO_CHANGES_RECURSIVE_MULTI_SUBRESOURCES_0));
            } else {
                result.append(key(Messages.GUI_UNDO_CHANGES_RECURSIVE_SUBRESOURCES_0));
            }
            result.append(dialogBlockEnd());
        }
        return result.toString();
    }

    /**
     * Returns the undo move operation flag parameter value.<p>
     *
     * @return the undo move operation flag parameter value
     */
    public String getParamMove() {

        return m_paramMove;
    }

    /**
     * Returns the value of the recursive parameter, 
     * or <code>null</code> if this parameter was not provided.<p>
     * 
     * The recursive parameter on folders decides if all subresources
     * of the folder should be unchanged, too.<p>
     * 
     * @return the value of the recursive parameter
     */
    public String getParamRecursive() {

        return m_paramRecursive;
    }

    /**
     * Sets the undo move operation flag parameter value.<p>
     *
     * @param paramMove the undo move operation flag to set
     */
    public void setParamMove(String paramMove) {

        m_paramMove = paramMove;
    }

    /**
     * Sets the value of the recursive parameter.<p>
     * 
     * @param value the value to set
     */
    public void setParamRecursive(String value) {

        m_paramRecursive = value;
    }

    /**
     * Returns the current CmsResource.<p>
     * 
     * @return the CmsResource
     */
    protected CmsResource getCurrentResource() {

        return m_currentResource;
    }

    /**
     * Returns the file name without path information of the current resource.<p>
     * 
     * @return the name of the current resource
     */
    protected String getFileName() {

        return CmsResource.getName(getParamResource());
    }

    /**
     * Returns the last modified date of the current resource as localized String.<p>
     * 
     * @return the date of last modification
     */
    protected String getLastModifiedDate() {

        long dateLong = getCurrentResource().getDateLastModified();
        return getMessages().getDateTime(dateLong);
    }

    /**
     * Returns the user who made the last changes to the current resource.<p>
     * 
     * @return the user who changed the resource
     */
    protected String getLastModifiedUser() {

        CmsUUID userId = getCurrentResource().getUserLastModified();
        try {
            return getCms().readUser(userId).getName();
        } catch (CmsException e) {
            return "";
        }
    }

    /**
     * @see org.opencms.workplace.CmsWorkplace#initWorkplaceRequestValues(org.opencms.workplace.CmsWorkplaceSettings, javax.servlet.http.HttpServletRequest)
     */
    protected void initWorkplaceRequestValues(CmsWorkplaceSettings settings, HttpServletRequest request) {

        // fill the parameter values in the get/set methods
        fillParamValues(request);

        // check the required permissions to undo changes of the resource       
        if (!checkResourcePermissions(CmsPermissionSet.ACCESS_WRITE, false)) {
            // no write permissions for the resource, set cancel action to close dialog
            setParamAction(DIALOG_CANCEL);
        }

        // set the dialog type
        setParamDialogtype(DIALOG_TYPE);
        // set the action for the JSP switch 
        if (DIALOG_TYPE.equals(getParamAction())) {
            setAction(ACTION_UNDOCHANGES);
        } else if (DIALOG_WAIT.equals(getParamAction())) {
            setAction(ACTION_WAIT);
        } else if (DIALOG_CANCEL.equals(getParamAction())) {
            setAction(ACTION_CANCEL);
        } else if (DIALOG_LOCKS_CONFIRMED.equals(getParamAction())) {
            setAction(ACTION_LOCKS_CONFIRMED);
        } else {
            setAction(ACTION_DEFAULT);
            // build title for undo changes dialog     
            setDialogTitle(Messages.GUI_UNDO_CHANGES_1, Messages.GUI_UNDO_CHANGES_MULTI_2);
        }

        if (!isMultiOperation()) {
            // collect resource to display information on single operation dialog
            try {
                setCurrentResource(getCms().readResource(getParamResource(), CmsResourceFilter.ALL));
            } catch (CmsException e) {
                // should usually never happen
                if (LOG.isInfoEnabled()) {
                    LOG.info(e.getLocalizedMessage());
                }
            }
        }

    }

    /**
     * Performs the undo changes operation on a resource.<p>
     * 
     * @return true, if the changes on a resource were undone, otherwise false
     * @throws CmsException if undo changes is not successful
     */
    protected boolean performDialogOperation() throws CmsException {

        // check if the current resource is a folder for single operation
        boolean isFolder = isOperationOnFolder();
        // on folder undo changes or multi operation display "please wait" screen, not for simple file undo changes
        if ((isMultiOperation() || isFolder) && !DIALOG_WAIT.equals(getParamAction())) {
            // return false, this will trigger the "please wait" screen
            return false;
        }

        // get the flag if the undo changes is recursive from request parameter
        boolean undoRecursive = Boolean.valueOf(getParamRecursive()).booleanValue();
        boolean undoMove = Boolean.valueOf(getParamMove()).booleanValue();

        CmsResourceUndoMode mode = CmsResource.UNDO_CONTENT;
        if (undoRecursive) {
            mode = CmsResource.UNDO_CONTENT_RECURSIVE;
        }
        if (undoMove) {
            mode = mode.includeMove();
        }

        Iterator i = getResourceList().iterator();
        // iterate the resources to delete
        while (i.hasNext()) {
            String resName = (String)i.next();
            try {
                // lock resource if autolock is enabled
                checkLock(resName);
                // undo changes on the resource
                getCms().undoChanges(resName, mode);
            } catch (CmsException e) {
                if (isMultiOperation()) {
                    // collect exceptions to create a detailed output
                    addMultiOperationException(e);
                } else {
                    // for single operation, throw the exception immediately
                    throw e;
                }
            }
        }
        // check if exceptions occured
        checkMultiOperationException(Messages.get(), Messages.ERR_UNDO_CHANGES_MULTI_0);

        return true;
    }

    /**
     * Sets the current CmsResource.<p>
     * 
     * @param res the CmsResource
     */
    protected void setCurrentResource(CmsResource res) {

        m_currentResource = res;
    }

}