handler = (I_CmsImportExportHandler)m_importExportHandlers.get(i);
            if (handler.matches(manifest)) {
                return handler;
            }

            handler = null;
        }

        if (handler == null) {

            CmsMessageContainer message = Messages.get().container(
                Messages.ERR_IMPORTEXPORT_ERROR_NO_HANDLER_FOUND_1,
                importFile);
            if (LOG.isDebugEnabled()) {
                LOG.debug(message.key());
            }

            throw new CmsImportExportException(message);
        }

        return null;
    }

    /**
     * Returns the list of configured import/export handlers.<p>
     * 
     * @return the list of configured import/export handlers
     */
    public List getImportExportHandlers() {

        return m_importExportHandlers;
    }

    /**
     * Returns the configured principal group translations.<p>
     * 
     * @return the configured principal group translations
     */
    public Map getImportGroupTranslations() {

        return m_importGroupTranslations;
    }

    /**
     * Returns the configured principal user translations.<p>
     * 
     * @return the configured principal user translations
     */
    public Map getImportUserTranslations() {

        return m_importUserTranslations;
    }

    /**
     * Returns the configured import version class names.<p>
     * 
     * @return the configured import version class names
     */
    public List getImportVersionClasses() {

        return m_importVersionClasses;
    }

    /**
     * Returns the URL of a 4.x OpenCms app. (e.g. http://localhost:8080/opencms/opencms/)
     * from which content was exported.<p>
     * 
     * This setting is required to import content of 4.x OpenCms apps. correct into 5.x OpenCms apps.<p>
     * 
     * @return the webAppUrl.
     */
    public String getOldWebAppUrl() {

        return m_webAppUrl;
    }

    /**
     * Checks if the current user has permissions to import data into the Cms,
     * and if so, creates a new import handler instance that imports the data.<p>
     * 
     * @param cms the current OpenCms context object
     * @param importFile the name (absolute path) of the resource (zipfile or folder) to be imported
     * @param importPath the name (absolute path) of the destination folder in the Cms if required, or null
     * @param report a Cms report to print log messages
     * 
     * @throws CmsRoleViolationException if the current user is not allowed to import the OpenCms database
     * @throws CmsImportExportException if operation was not successful
     * @throws CmsXmlException if the manifest of the import could not be unmarshalled
     * @throws CmsException in case of errors accessing the VFS
     * 
     * @see I_CmsImportExportHandler
     */
    public void importData(CmsObject cms, String importFile, String importPath, I_CmsReport report)
    throws CmsImportExportException, CmsXmlException, CmsRoleViolationException, CmsException {

        // check the required role permissions
        cms.checkRole(CmsRole.IMPORT_DATABASE);

        try {
            OpenCms.fireCmsEvent(new CmsEvent(I_CmsEventListener.EVENT_CLEAR_CACHES, Collections.EMPTY_MAP));
            I_CmsImportExportHandler handler = getImportExportHandler(importFile);
            handler.importData(cms, importFile, importPath, report);
        } finally {
            OpenCms.fireCmsEvent(new CmsEvent(I_CmsEventListener.EVENT_CLEAR_CACHES, Collections.EMPTY_MAP));
        }
    }

    /**
     * Checks if colliding resources should be overwritten during the import.<p>
     * 
     * @return true, if colliding resources should be overwritten during the import
     * @see #setOverwriteCollidingResources(boolean)
     */
    public boolean overwriteCollidingResources() {

        return m_overwriteCollidingResources;
    }

    /**
     * Sets if imported pages should be converted into XML pages.<p>
     * 
     * @param convertToXmlPage true, if imported pages should be converted into XML pages.
     */
    public void setConvertToXmlPage(boolean convertToXmlPage) {

        if (LOG.isDebugEnabled()) {
            LOG.debug(Messages.get().getBundle().key(
                Messages.LOG_IMPORTEXPORT_SET_CONVERT_PARAMETER_1,
                Boolean.toString(convertToXmlPage)));
        }
        m_convertToXmlPage = convertToXmlPage;
    }

    /**
     * Sets if imported pages should be converted into XML pages.<p>
     * 
     * @param convertToXmlPage <code>"true"</code>, if imported pages should be converted into XML pages.
     */
    public void setConvertToXmlPage(String convertToXmlPage) {

        setConvertToXmlPage(Boolean.valueOf(convertToXmlPage).booleanValue());
    }

    /**
     * Sets the URL of a 4.x OpenCms app. (e.g. http://localhost:8080/opencms/opencms/)
     * from which content was exported.<p>
     * 
     * This setting is required to import content of 4.x OpenCms apps. correct into 5.x OpenCms apps.<p>
     * 
     * @param webAppUrl a URL of the a OpenCms app. (e.g. http://localhost:8080/opencms/opencms/)
     */
    public void setOldWebAppUrl(String webAppUrl) {

        if (LOG.isDebugEnabled()) {
            LOG.debug(Messages.get().getBundle().key(Messages.LOG_IMPORTEXPORT_SET_OLD_WEBAPP_URL_1, webAppUrl));
        }
        m_webAppUrl = webAppUrl;
    }

    /**
     * Sets whether colliding resources should be overwritten during the import for a
     * specified import implementation.<p>
     * 
     * v1 and v2 imports (without resource UUIDs in the manifest) *MUST* overwrite colliding 
     * resources. Don't forget to set this flag back to it's original value in v1 and v2
     * import implementations!<p>
     * 
     * This flag must be set to false to force imports > v2 to move colliding resources to 
     * /system/lost-found/.<p>
     * 
     * The import implementation has to take care to set this flag correct!<p>
     * 
     * @param overwriteCollidingResources true if colliding resources should be overwritten during the import
     */
    public void setOverwriteCollidingResources(boolean overwriteCollidingResources) {

        if (LOG.isDebugEnabled()) {
            LOG.debug(Messages.get().getBundle().key(
                Messages.LOG_IMPORTEXPORT_SET_OVERWRITE_PARAMETER_1,
                Boolean.toString(overwriteCollidingResources)));
        }
        m_overwriteCollidingResources = overwriteCollidingResources;
    }

    /**
     * @see CmsImportExportManager#setOverwriteCollidingResources(boolean)
     * 
     * @param overwriteCollidingResources <code>"true"</code> if colliding resources should be overwritten during the import
     */
    public void setOverwriteCollidingResources(String overwriteCollidingResources) {

        setOverwriteCollidingResources(Boolean.valueOf(overwriteCollidingResources).booleanValue());
    }

    /**
     * Returns the translated name for the given group name.<p>
     * 
     * If no matching name is found, the given group name is returned.<p>
     * 
     * @param name the group name to translate
     * @return the translated name for the given group name
     */
    public String translateGroup(String name) {

        if (m_importGroupTranslations == null) {
            return name;
        }
        String match = (String)m_importGroupTranslations.get(name);
        if (match != null) {
            return match;
        } else {
            return name;
        }
    }

    /**
     * Returns the translated name for the given user name.<p>
     * 
     * If no matching name is found, the given user name is returned.<p>
     * 
     * @param name the user name to translate
     * @return the translated name for the given user name
     */
    public String translateUser(String name) {

        if (m_importUserTranslations == null) {
            return name;
        }
        String match = (String)m_importUserTranslations.get(name);
        if (match != null) {
            return match;
        } else {
            return name;
        }
    }

    /**
     * @see java.lang.Object#finalize()
     */
    protected void finalize() throws Throwable {

        try {
            if (m_immutableResources != null) {
                m_immutableResources.clear();
            }
            m_immutableResources = null;

            if (m_ignoredProperties != null) {
                m_ignoredProperties.clear();
            }
            m_ignoredProperties = null;
        } catch (Throwable t) {
            // noop
        } finally {
            super.finalize();
        }
    }
}