package org.apache.turbine.services.template;


/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */


import java.io.File;
import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.ConcurrentMap;

import org.apache.commons.configuration2.Configuration;
import org.apache.commons.lang3.StringUtils;
import org.apache.fulcrum.factory.FactoryException;
import org.apache.fulcrum.factory.FactoryService;
import org.apache.fulcrum.parser.ParameterParser;
import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;
import org.apache.turbine.Turbine;
import org.apache.turbine.TurbineConstants;
import org.apache.turbine.modules.Assembler;
import org.apache.turbine.modules.Layout;
import org.apache.turbine.modules.Loader;
import org.apache.turbine.modules.Navigation;
import org.apache.turbine.modules.Page;
import org.apache.turbine.modules.Screen;
import org.apache.turbine.pipeline.PipelineData;
import org.apache.turbine.services.InitializationException;
import org.apache.turbine.services.TurbineBaseService;
import org.apache.turbine.services.TurbineServices;
import org.apache.turbine.services.assemblerbroker.AssemblerBrokerService;
import org.apache.turbine.services.servlet.ServletService;
import org.apache.turbine.services.template.mapper.BaseTemplateMapper;
import org.apache.turbine.services.template.mapper.ClassMapper;
import org.apache.turbine.services.template.mapper.DirectMapper;
import org.apache.turbine.services.template.mapper.DirectTemplateMapper;
import org.apache.turbine.services.template.mapper.LayoutTemplateMapper;
import org.apache.turbine.services.template.mapper.Mapper;
import org.apache.turbine.services.template.mapper.ScreenTemplateMapper;
import org.apache.turbine.util.uri.URIConstants;

/**
 * This service provides a method for mapping templates to their
 * appropriate Screens or Navigations.  It also allows templates to
 * define a layout/navigations/screen modularization within the
 * template structure.  It also performs caching if turned on in the
 * properties file.
 *
 * This service is not bound to a specific templating engine but we
 * will use the Velocity templating engine for the examples. It is
 * available by using the VelocityService.
 *
 * This assumes the following properties in the Turbine configuration:
 *
 * <pre>
 * # Register the VelocityService for the "vm" extension.
 * services.VelocityService.template.extension=vm
 *
 * # Default Java class for rendering a Page in this service
 * # (must be found on the class path (org.apache.turbine.modules.page.VelocityPage))
 * services.VelocityService.default.page = VelocityPage
 *
 * # Default Java class for rendering a Screen in this service
 * # (must be found on the class path (org.apache.turbine.modules.screen.VelocityScreen))
 * services.VelocityService.default.screen=VelocityScreen
 *
 * # Default Java class for rendering a Layout in this service
 * # (must be found on the class path (org.apache.turbine.modules.layout.VelocityOnlyLayout))
 * services.VelocityService.default.layout = VelocityOnlyLayout
 *
 * # Default Java class for rendering a Navigation in this service
 * # (must be found on the class path (org.apache.turbine.modules.navigation.VelocityNavigation))
 * services.VelocityService.default.navigation=VelocityNavigation
 *
 * # Default Template Name to be used as Layout. If nothing else is
 * # found, return this as the default name for a layout
 * services.VelocityService.default.layout.template = Default.vm
 * </pre>
 * If you want to render a template, a search path is used to find
 * a Java class which might provide information for the context of
 * this template.
 *
 * If you request e.g. the template screen
 * <pre>
 * about,directions,Driving.vm
 * </pre>
 * then the following class names are searched (on the module search
 * path):
 * <pre>
 * 1. about.directions.Driving     &lt;- direct matching the template to the class name
 * 2. about.directions.Default     &lt;- matching the package, class name is Default
 * 3. about.Default                &lt;- stepping up in the package hierarchy, looking for Default
 * 4. Default                      &lt;- Class called "Default" without package
 * 5. VelocityScreen               &lt;- The class configured by the Service (VelocityService) to
 * </pre>
 * And if you have the following module packages configured:
 * <pre>
 * module.packages = org.apache.turbine.modules, com.mycorp.modules
 * </pre>
 * then the class loader will look for
 * <pre>
 * org.apache.turbine.modules.screens.about.directions.Driving
 * com.mycorp.modules.screens.about.directions.Driving
 * org.apache.turbine.modules.screens.about.directions.Default
 * com.mycorp.modules.screens.about.directions.Default
 * org.apache.turbine.modules.screens.about.Default
 * com.mycorp.modules.screens.about.Default
 * org.apache.turbine.modules.screens.Default
 * com.mycorp.modules.screens.Default
 * org.apache.turbine.modules.screens.VelocityScreen
 * com.mycorp.modules.screens.VelocityScreen
 * </pre>
 * Most of the times, you don't have any backing Java class for a
 * template screen, so the first match will be
 * org.apache.turbine.modules.screens.VelocityScreen
 * which then renders your screen.
 * <p>
 * Please note, that your Screen Template (Driving.vm) must exist!
 * If it does not exist, the Template Service will report an error.
 * <p>
 * Once the screen is found, the template service will look for
 * the Layout and Navigation templates of your Screen. Here, the
 * template service looks for matching template names!
 * <p>
 * Consider our example:
 * <pre>
 * about,directions,Driving.vm (Screen Name)
 * </pre>
 * Now the template service will look for the following Navigation
 * and Layout templates:
 * <pre>
 * 1. about,directions,Driving.vm      &lt;- exact match
 * 2. about,directions,Default.vm      &lt;- package match, Default name
 * 3. about,Default.vm                 &lt;- stepping up in the hierarchy
 * 4. Default.vm                       &lt;- The name configured as default.layout.template
 *                                        in the Velocity service.
 * </pre>
 * And now Hennings' two golden rules for using templates:
 * <p>
 * Many examples and docs from older Turbine code show template pathes
 * with a slashes. Repeat after me: "TEMPLATE NAMES NEVER CONTAIN SLASHES!"
 * <p>
 * Many examples and docs from older Turbine code show templates that start
 * with "/". This is not only a violation of the rule above but actively breaks
 * things like loading templates from a jar with the velocity jar loader. Repeat
 * after me: "TEMPLATE NAMES ARE NOT PATHES. THEY'RE NOT ABSOLUTE AND HAVE NO
 * LEADING /".
 * <p>
 * If you now wonder how a template name is mapped to a file name: This is
 * scope of the templating engine. Velocity e.g. has this wonderful option to
 * load templates from jar archives. There is no single file but you tell
 * velocity "get about,directions,Driving.vm" and it returns the rendered
 * template. This is not the job of the Templating Service but of the Template
 * rendering services like VelocityService.
 *
 * @author <a href="mailto:john.mcnally@clearink.com">John D. McNally</a>
 * @author <a href="mailto:mbryson@mont.mindspring.com">Dave Bryson</a>
 * @author <a href="mailto:jvanzyl@apache.org">Jason van Zyl</a>
 * @author <a href="mailto:dlr@finemaltcoding.com">Daniel Rall</a>
 * @author <a href="mailto:ilkka.priha@simsoft.fi">Ilkka Priha</a>
 * @author <a href="mailto:hps@intermeta.de">Henning P. Schmiedehausen</a>
 * @version $Id$
 */
public class TurbineTemplateService
    extends TurbineBaseService
    implements TemplateService
{
    /** Logging */
    private static final Logger log = LogManager.getLogger(TurbineTemplateService.class);

    /** Represents Page Objects */
    public static final int PAGE_KEY = 0;

    /** Represents Screen Objects */
    public static final int SCREEN_KEY = 1;

    /** Represents Layout Objects */
    public static final int LAYOUT_KEY = 2;

    /** Represents Navigation Objects */
    public static final int NAVIGATION_KEY = 3;

    /** Represents Layout Template Objects */
    public static final int LAYOUT_TEMPLATE_KEY = 4;

    /** Represents Layout Template Objects */
    public static final String LAYOUT_TEMPLATE_NAME = "layout.template";

    /** Represents Screen Template Objects */
    public static final int SCREEN_TEMPLATE_KEY = 5;

    /** Represents Screen Template Objects */
    public static final String SCREEN_TEMPLATE_NAME = "screen.template";

    /** Represents Navigation Template Objects */
    public static final int NAVIGATION_TEMPLATE_KEY = 6;

    /** Represents Navigation Template Objects */
    public static final String NAVIGATION_TEMPLATE_NAME = "navigation.template";

    /** Number of different Template Types that we know of */
    public static final int TEMPLATE_TYPES = 7;

    /** Here we register the mapper objects for our various object types */
    private Mapper [] mapperRegistry = null;

    /**
     * The default file extension used as a registry key when a
     * template's file extension cannot be determined.
     *
     * @deprecated Use TemplateService.DEFAULT_EXTENSION_VALUE.
     */
    @Deprecated
    protected static final String NO_FILE_EXT = TemplateService.DEFAULT_EXTENSION_VALUE;


    /** Flag set if cache is to be used. */
    private boolean useCache = false;

    /** Default extension for templates. */
    private String defaultExtension;

    /** Default template without the default extension. */
    private String defaultTemplate;

    /**
     * The servlet service.
     */
    private ServletService servletService;

    /**
     * The mappings of template file extensions to {@link
     * org.apache.turbine.services.template.TemplateEngineService}
     * implementations. Implementing template engines can locate
     * templates within the capability of any resource loaders they
     * may possess, and other template engines are stuck with file
     * based template hierarchy only.
     */
    private ConcurrentMap<String, TemplateEngineService> templateEngineRegistry = null;

    /**
     * C'tor
     */
    public TurbineTemplateService()
    {
        // empty
    }

    /**
     * Called the first time the Service is used.
     *
     * @throws InitializationException Something went wrong when
     *                                     setting up the Template Service.
     */
    @Override
    public void init()
        throws InitializationException
    {
        // Get the configuration for the template service.
        Configuration config = getConfiguration();

        servletService = (ServletService)TurbineServices.getInstance().getService(ServletService.SERVICE_NAME);

        // Get the default extension to use if nothing else is applicable.
        defaultExtension = config.getString(TemplateService.DEFAULT_EXTENSION_KEY,
            TemplateService.DEFAULT_EXTENSION_VALUE);

        defaultTemplate =  config.getString(TemplateService.DEFAULT_TEMPLATE_KEY,
            TemplateService.DEFAULT_TEMPLATE_VALUE);

        // Check to see if we are going to be caching modules.
        // Aaargh, who moved this _out_ of the TemplateService package?
        useCache = Turbine.getConfiguration().getBoolean(TurbineConstants.MODULE_CACHE_KEY,
            TurbineConstants.MODULE_CACHE_DEFAULT);

        log.debug("Default Extension: {}", defaultExtension);
        log.debug("Default Template:  {}", defaultTemplate);
        log.debug("Use Caching:       {}", Boolean.valueOf(useCache));

        templateEngineRegistry = new ConcurrentHashMap<>();

        initMapper(config);
        setInit(true);
    }

    /**
     * Returns true if the Template Service has caching activated
     *
     * @return true if Caching is active.
     */
    @Override
    public boolean isCaching()
    {
        return useCache;
    }

    /**
     * Get the default template name extension specified
     * in the template service properties. If no extension
     * is defined, return the empty string.
     *
     * @return The default extension.
     */
    @Override
    public String getDefaultExtension()
    {
        return StringUtils.isNotEmpty(defaultExtension) ? defaultExtension : "";
    }

    /**
     * Return Extension for a supplied template
     *
     * @param template The template name
     *
     * @return extension The extension for the supplied template
     */
    @Override
    public String getExtension(String template)
    {
        if (StringUtils.isEmpty(template))
        {
            return getDefaultExtension();
        }

        int dotIndex = template.lastIndexOf(EXTENSION_SEPARATOR);

        return dotIndex < 0 ? getDefaultExtension() : template.substring(dotIndex + 1);
    }


    /**
     * Returns the Default Template Name with the Default Extension.
     * If the extension is unset, return only the template name
     *
     * @return The default template Name
     */
    @Override
    public String getDefaultTemplate()
    {
        StringBuilder sb = new StringBuilder();
        sb.append(defaultTemplate);
        if (StringUtils.isNotEmpty(defaultExtension))
        {
            sb.append(EXTENSION_SEPARATOR);
            sb.append(getDefaultExtension());
        }
        return sb.toString();
    }

    /**
     * Get the default page module name of the template engine
     * service corresponding to the default template name extension.
     *
     * @return The default page module name.
     */
    @Override
    public String getDefaultPage()
    {
        return getDefaultPageName(getDefaultTemplate());
    }

    /**
     * Get the default screen module name of the template engine
     * service corresponding to the default template name extension.
     *
     * @return The default screen module name.
     */
    @Override
    public String getDefaultScreen()
    {
        return getDefaultScreenName(getDefaultTemplate());
    }

    /**
     * Get the default layout module name of the template engine
     * service corresponding to the default template name extension.
     *
     * @return The default layout module name.
     */
    @Override
    public String getDefaultLayout()
    {
        return getDefaultLayoutName(getDefaultTemplate());
    }

    /**
     * Get the default navigation module name of the template engine
     * service corresponding to the default template name extension.
     *
     * @return The default navigation module name.
     */
    @Override
    public String getDefaultNavigation()
    {
        return getDefaultNavigationName(getDefaultTemplate());
    }

    /**
     * Get the default layout template name of the template engine
     * service corresponding to the default template name extension.
     *
     * @return The default layout template name.
     */
    @Override
    public String getDefaultLayoutTemplate()
    {
        return getDefaultLayoutTemplateName(getDefaultTemplate());
    }

    /**
     * Get the default page module name of the template engine
     * service corresponding to the template name extension of
     * the named template.
     *
     * @param template The template name.
     * @return The default page module name.
     */
    @Override
    public String getDefaultPageName(String template)
    {
        return mapperRegistry[PAGE_KEY].getDefaultName(template);
    }

    /**
     * Get the default screen module name of the template engine
     * service corresponding to the template name extension of
     * the named template.
     *
     * @param template The template name.
     * @return The default screen module name.
     */
    @Override
    public String getDefaultScreenName(String template)
    {
        return mapperRegistry[SCREEN_KEY].getDefaultName(template);
    }

    /**
     * Get the default layout module name of the template engine
     * service corresponding to the template name extension of
     * the named template.
     *
     * @param template The template name.
     * @return The default layout module name.
     */
    @Override
    public String getDefaultLayoutName(String template)
    {
        return mapperRegistry[LAYOUT_KEY].getDefaultName(template);
    }

    /**
     * Get the default navigation module name of the template engine
     * service corresponding to the template name extension of
     * the named template.
     *
     * @param template The template name.
     * @return The default navigation module name.
     */
    @Override
    public String getDefaultNavigationName(String template)
    {
        return mapperRegistry[NAVIGATION_KEY].getDefaultName(template);
    }

    /**
     * Get the default layout template name of the template engine
     * service corresponding to the template name extension of
     * the named template.
     *
     * @param template The template name.
     * @return The default layout template name.
     */
    @Override
    public String getDefaultLayoutTemplateName(String template)
    {
        return mapperRegistry[LAYOUT_TEMPLATE_KEY].getDefaultName(template);
    }

    /**
     * Find the default page module name for the given request.
     *
     * @param pipelineData The encapsulation of the request to retrieve the
     *             default page for.
     * @return The default page module name.
     */
    @Override
    public String getDefaultPageName(PipelineData pipelineData)
    {
        ParameterParser pp = pipelineData.get(Turbine.class, ParameterParser.class);
        String template = pp.get(URIConstants.CGI_TEMPLATE_PARAM);
        return template != null ? getDefaultPageName(template) : getDefaultPage();
    }

    /**
     * Find the default layout module name for the given request.
     *
     * @param pipelineData The encapsulation of the request to retrieve the
     *             default layout for.
     * @return The default layout module name.
     */
    @Override
    public String getDefaultLayoutName(PipelineData pipelineData)
    {
        ParameterParser pp = pipelineData.get(Turbine.class, ParameterParser.class);
        String template = pp.get(URIConstants.CGI_TEMPLATE_PARAM);
        return template != null ? getDefaultLayoutName(template) : getDefaultLayout();
    }

    /**
     * Locate and return the name of the screen module to be used
     * with the named screen template.
     *
     * @param template The screen template name.
     * @return The found screen module name.
     * @throws Exception a generic exception.
     */
    @Override
    public String getScreenName(String template)
        throws Exception
    {
        return mapperRegistry[SCREEN_KEY].getMappedName(template);
    }

    /**
     * Locate and return the name of the layout module to be used
     * with the named layout template.
     *
     * @param template The layout template name.
     * @return The found layout module name.
     * @throws Exception a generic exception.
     */
    @Override
    public String getLayoutName(String template)
        throws Exception
    {
        return mapperRegistry[LAYOUT_KEY].getMappedName(template);
    }

    /**
     * Locate and return the name of the navigation module to be used
     * with the named navigation template.
     *
     * @param template The navigation template name.
     * @return The found navigation module name.
     * @throws Exception a generic exception.
     */
    @Override
    public String getNavigationName(String template)
        throws Exception
    {
        return mapperRegistry[NAVIGATION_KEY].getMappedName(template);
    }

    /**
     * Locate and return the name of the screen template corresponding
     * to the given template name parameter. This might return null if
     * the screen is not found!
     *
     * @param template The template name parameter.
     * @return The found screen template name.
     * @throws Exception a generic exception.
     */
    @Override
    public String getScreenTemplateName(String template)
        throws Exception
    {
        return mapperRegistry[SCREEN_TEMPLATE_KEY].getMappedName(template);
    }

    /**
     * Locate and return the name of the layout template corresponding
     * to the given screen template name parameter.
     *
     * @param template The template name parameter.
     * @return The found screen template name.
     * @throws Exception a generic exception.
     */
    @Override
    public String getLayoutTemplateName(String template)
        throws Exception
    {
        return mapperRegistry[LAYOUT_TEMPLATE_KEY].getMappedName(template);
    }

    /**
     * Locate and return the name of the navigation template corresponding
     * to the given template name parameter. This might return null if
     * the navigation is not found!
     *
     * @param template The template name parameter.
     * @return The found navigation template name.
     * @throws Exception a generic exception.
     */
    @Override
    public String getNavigationTemplateName(String template)
        throws Exception
    {
        return mapperRegistry[NAVIGATION_TEMPLATE_KEY].getMappedName(template);
    }

    /**
     * Translates the supplied template paths into their Turbine-canonical
     * equivalent (probably absolute paths). This is used if the templating
     * engine (e.g. JSP) does not provide any means to load a page but
     * the page path is passed to the servlet container.
     *
     * @param templatePaths An array of template paths.
     * @return An array of translated template paths.
     * @deprecated Each template engine service should know how to translate
     *             a request onto a file.
     */
    @Override
    @Deprecated
    public String[] translateTemplatePaths(String[] templatePaths)
    {
        for (int i = 0; i < templatePaths.length; i++)
        {
            templatePaths[i] = servletService.getRealPath(templatePaths[i]);
        }
        return templatePaths;
    }

    /**
     * Delegates to the appropriate {@link
     * org.apache.turbine.services.template.TemplateEngineService} to
     * check the existence of the specified template.
     *
     * @param template The template to check for the existence of.
     * @param templatePaths The paths to check for the template.
     * @deprecated Use templateExists from the various Templating Engines
     */
    @Override
    @Deprecated
    public boolean templateExists(String template, String[] templatePaths)
    {
        for (String templatePath : templatePaths)
        {
            if (new File(templatePath, template).exists())
            {
                return true;
            }
        }
        return false;
    }

    /**
     * Registers the provided template engine for use by the
     * <code>TemplateService</code>.
     *
     * @param service The <code>TemplateEngineService</code> to register.
     */
    @Override
    public void registerTemplateEngineService(TemplateEngineService service)
    {
        String[] exts = service.getAssociatedFileExtensions();

        for (String ext : exts)
        {
            templateEngineRegistry.put(ext, service);
        }
    }

    /**
     * The {@link org.apache.turbine.services.template.TemplateEngineService}
     * associated with the specified template's file extension.
     *
     * @param template The template name.
     * @return The template engine service.
     */
    @Override
    public TemplateEngineService getTemplateEngineService(String template)
    {
        return templateEngineRegistry.get(getExtension(template));
    }

    /**
     * Register a template Mapper to the service. This Mapper
     * performs the template mapping and searching for a specific
     * object type which is managed by the TemplateService.
     *
     * @param templateKey  One of the _KEY constants for the Template object types.
     * @param mapper  An object which implements the Mapper interface.
     */
    private void registerMapper(int templateKey, Mapper mapper)
    {
        mapper.init();
        mapperRegistry[templateKey] = mapper;
    }

    /**
     * Load and configure the Template mappers for
     * the Template Service.
     *
     * @param conf The current configuration object.
     * @throws InitializationException A problem occurred trying to set up the mappers.
     */
    @SuppressWarnings("unchecked")
    private void initMapper(Configuration conf)
            throws InitializationException
    {
        // Create a registry with the number of Template Types managed by this service.
        // We could use a List object here and extend the number of managed objects
        // dynamically. However, by using an Object Array, we get much more performance
        // out of the Template Service.
        mapperRegistry = new Mapper[TEMPLATE_TYPES];

        String [] mapperNames = new String [] {
            Page.NAME, Screen.NAME, Layout.NAME, Navigation.NAME,
            LAYOUT_TEMPLATE_NAME, SCREEN_TEMPLATE_NAME, NAVIGATION_TEMPLATE_NAME
        };

        Class<?> [] mapperKeys = new Class<?> [] {
            Page.class, Screen.class, Layout.class, Navigation.class,
            Layout.class, Screen.class, Navigation.class
        };

        String [] mapperClasses = new String [] {
            DirectMapper.class.getName(),
            ClassMapper.class.getName(),
            ClassMapper.class.getName(),
            ClassMapper.class.getName(),
            LayoutTemplateMapper.class.getName(),
            ScreenTemplateMapper.class.getName(),
            DirectTemplateMapper.class.getName()
        };

        AssemblerBrokerService ab = (AssemblerBrokerService)TurbineServices.getInstance()
                                        .getService(AssemblerBrokerService.SERVICE_NAME);

        int [] mapperCacheSize = new int [mapperKeys.length];
        Loader<? extends Assembler> [] mapperLoader = new Loader<?>[mapperKeys.length];

        for (int i = 0; i < mapperKeys.length; i++)
        {
            mapperLoader[i] = ab.getLoader((Class<? extends Assembler>)mapperKeys[i]);
            mapperCacheSize[i] = (mapperLoader[i] != null) ? mapperLoader[i].getCacheSize() : 0;
        }

        // HACK: to achieve the same behavior as before
        mapperLoader[LAYOUT_TEMPLATE_KEY] = null;
        mapperLoader[SCREEN_TEMPLATE_KEY] = null;
        mapperLoader[NAVIGATION_TEMPLATE_KEY] = null;

        String [] mapperDefaultProperty = new String [] {
            TemplateEngineService.DEFAULT_PAGE,
            TemplateEngineService.DEFAULT_SCREEN,
            TemplateEngineService.DEFAULT_LAYOUT,
            TemplateEngineService.DEFAULT_NAVIGATION,
            TemplateEngineService.DEFAULT_LAYOUT_TEMPLATE,
            TemplateEngineService.DEFAULT_SCREEN_TEMPLATE,
            TemplateEngineService.DEFAULT_NAVIGATION_TEMPLATE
        };

        char [] mapperSeparator = new char [] { '.', '.', '.', '.', '/', '/', '/' };

        String [] mapperPrefix = new String [] {
            null, null, null, null,
            Layout.PREFIX,
            Screen.PREFIX,
            Navigation.PREFIX  };

        for (int i = 0; i < TEMPLATE_TYPES; i++)
        {
            StringBuilder mapperProperty = new StringBuilder();
            mapperProperty.append("mapper.");
            mapperProperty.append(mapperNames[i]);
            mapperProperty.append(".class");

            String mapperClass =
                    conf.getString(mapperProperty.toString(), mapperClasses[i]);

            log.info("Using {} to map {} elements", mapperClass, mapperNames[i]);

            Mapper tm = null;

            try
            {
                    FactoryService factory = (FactoryService)TurbineServices.getInstance().getService(FactoryService.ROLE);
                    tm = factory.getInstance(mapperClass);
            }
            catch (FactoryException e)
            {
                        throw new InitializationException("", e);
                    }

            tm.setUseCache(useCache);
            tm.setCacheSize(mapperCacheSize[i]);
            tm.setDefaultProperty(mapperDefaultProperty[i]);
            tm.setSeparator(mapperSeparator[i]);

            if (mapperLoader[i] != null && tm instanceof ClassMapper)
            {
                ((ClassMapper) tm).setLoader(mapperLoader[i]);
            }

            if (mapperPrefix[i] != null && tm instanceof BaseTemplateMapper)
            {
                ((BaseTemplateMapper) tm).setPrefix(mapperPrefix[i]);
            }

            registerMapper(i, tm);
        }
    }
}