Java 类org.springframework.web.context.support.ServletContextResourceLoader 实例源码

@Bean
@ConditionalOnMissingBean(PebbleEngine.class)
public PebbleEngine pebbleEngine(final PebbleEngineConfigurer pebbleEngineConfigurer) {
    final PebbleTemplateLoader loader = new PebbleTemplateLoader();
    loader.setResourceLoader(new ServletContextResourceLoader(context.getServletContext()));
    loader.setPrefix(this.properties.getPrefix());
    loader.setSuffix(this.properties.getSuffix());

    final List<Loader<?>> list = new ArrayList<>();
    list.add(loader);
    list.add(new ClasspathLoader());
    list.add(new FileLoader());

    final DelegatingLoader loaderAll = new DelegatingLoader(list);
    pebbleEngineConfigurer.setLoader(loaderAll);
    pebbleEngineConfigurer.setCache(this.properties.isCache());
    pebbleEngineConfigurer.setCacheSize(this.properties.getCacheSize());

    return pebbleEngineConfigurer.getPebbleEngine();
}

/**
 * Standard way of initializing this filter.
 * Map config parameters onto bean properties of this filter, and
 * invoke subclass initialization.
 * @param filterConfig the configuration for this filter
 * @throws ServletException if bean properties are invalid (or required
 * properties are missing), or if subclass initialization fails.
 * @see #initFilterBean
 */
@Override
public final void init(FilterConfig filterConfig) throws ServletException {
    Assert.notNull(filterConfig, "FilterConfig must not be null");
    if (logger.isDebugEnabled()) {
        logger.debug("Initializing filter '" + filterConfig.getFilterName() + "'");
    }

    this.filterConfig = filterConfig;

    // Set bean properties from init parameters.
    try {
        PropertyValues pvs = new FilterConfigPropertyValues(filterConfig, this.requiredProperties);
        BeanWrapper bw = PropertyAccessorFactory.forBeanPropertyAccess(this);
        ResourceLoader resourceLoader = new ServletContextResourceLoader(filterConfig.getServletContext());
        bw.registerCustomEditor(Resource.class, new ResourceEditor(resourceLoader, this.environment));
        initBeanWrapper(bw);
        bw.setPropertyValues(pvs, true);
    }
    catch (BeansException ex) {
        String msg = "Failed to set bean properties on filter '" +
            filterConfig.getFilterName() + "': " + ex.getMessage();
        logger.error(msg, ex);
        throw new NestedServletException(msg, ex);
    }

    // Let subclasses do whatever initialization they like.
    initFilterBean();

    if (logger.isDebugEnabled()) {
        logger.debug("Filter '" + filterConfig.getFilterName() + "' configured successfully");
    }
}

/**
 * Map config parameters onto bean properties of this servlet, and
 * invoke subclass initialization.
 * @throws ServletException if bean properties are invalid (or required
 * properties are missing), or if subclass initialization fails.
 */
@Override
public final void init() throws ServletException {
    if (logger.isDebugEnabled()) {
        logger.debug("Initializing servlet '" + getServletName() + "'");
    }

    // Set bean properties from init parameters.
    try {
        PropertyValues pvs = new ServletConfigPropertyValues(getServletConfig(), this.requiredProperties);
        BeanWrapper bw = PropertyAccessorFactory.forBeanPropertyAccess(this);
        ResourceLoader resourceLoader = new ServletContextResourceLoader(getServletContext());
        bw.registerCustomEditor(Resource.class, new ResourceEditor(resourceLoader, getEnvironment()));
        initBeanWrapper(bw);
        bw.setPropertyValues(pvs, true);
    }
    catch (BeansException ex) {
        logger.error("Failed to set bean properties on servlet '" + getServletName() + "'", ex);
        throw ex;
    }

    // Let subclasses do whatever initialization they like.
    initServletBean();

    if (logger.isDebugEnabled()) {
        logger.debug("Servlet '" + getServletName() + "' configured successfully");
    }
}

/**
 * Standard way of initializing this filter.
 * Map config parameters onto bean properties of this filter, and
 * invoke subclass initialization.
 * @param filterConfig the configuration for this filter
 * @throws ServletException if bean properties are invalid (or required
 * properties are missing), or if subclass initialization fails.
 * @see #initFilterBean
 */
@Override
public final void init(FilterConfig filterConfig) throws ServletException {
    Assert.notNull(filterConfig, "FilterConfig must not be null");
    if (logger.isDebugEnabled()) {
        logger.debug("Initializing filter '" + filterConfig.getFilterName() + "'");
    }

    this.filterConfig = filterConfig;

    // Set bean properties from init parameters.
    try {
        PropertyValues pvs = new FilterConfigPropertyValues(filterConfig, this.requiredProperties);
        BeanWrapper bw = PropertyAccessorFactory.forBeanPropertyAccess(this);
        ResourceLoader resourceLoader = new ServletContextResourceLoader(filterConfig.getServletContext());
        bw.registerCustomEditor(Resource.class, new ResourceEditor(resourceLoader, this.environment));
        initBeanWrapper(bw);
        bw.setPropertyValues(pvs, true);
    }
    catch (BeansException ex) {
        String msg = "Failed to set bean properties on filter '" +
            filterConfig.getFilterName() + "': " + ex.getMessage();
        logger.error(msg, ex);
        throw new NestedServletException(msg, ex);
    }

    // Let subclasses do whatever initialization they like.
    initFilterBean();

    if (logger.isDebugEnabled()) {
        logger.debug("Filter '" + filterConfig.getFilterName() + "' configured successfully");
    }
}

/**
 * Map config parameters onto bean properties of this servlet, and
 * invoke subclass initialization.
 * @throws ServletException if bean properties are invalid (or required
 * properties are missing), or if subclass initialization fails.
 */
@Override
public final void init() throws ServletException {
    if (logger.isDebugEnabled()) {
        logger.debug("Initializing servlet '" + getServletName() + "'");
    }

    // Set bean properties from init parameters.
    try {
        PropertyValues pvs = new ServletConfigPropertyValues(getServletConfig(), this.requiredProperties);
        BeanWrapper bw = PropertyAccessorFactory.forBeanPropertyAccess(this);
        ResourceLoader resourceLoader = new ServletContextResourceLoader(getServletContext());
        bw.registerCustomEditor(Resource.class, new ResourceEditor(resourceLoader, getEnvironment()));
        initBeanWrapper(bw);
        bw.setPropertyValues(pvs, true);
    }
    catch (BeansException ex) {
        logger.error("Failed to set bean properties on servlet '" + getServletName() + "'", ex);
        throw ex;
    }

    // Let subclasses do whatever initialization they like.
    initServletBean();

    if (logger.isDebugEnabled()) {
        logger.debug("Servlet '" + getServletName() + "' configured successfully");
    }
}

/**
 * Standard way of initializing this filter.
 * Map config parameters onto bean properties of this filter, and
 * invoke subclass initialization.
 * @param filterConfig the configuration for this filter
 * @throws ServletException if bean properties are invalid (or required
 * properties are missing), or if subclass initialization fails.
 * @see #initFilterBean
 */
public final void init(FilterConfig filterConfig) throws ServletException {
    Assert.notNull(filterConfig, "FilterConfig must not be null");
    if (logger.isDebugEnabled()) {
        logger.debug("Initializing filter '" + filterConfig.getFilterName() + "'");
    }

    this.filterConfig = filterConfig;

    // Set bean properties from init parameters.
    try {
        PropertyValues pvs = new FilterConfigPropertyValues(filterConfig, this.requiredProperties);
        BeanWrapper bw = PropertyAccessorFactory.forBeanPropertyAccess(this);
        ResourceLoader resourceLoader = new ServletContextResourceLoader(filterConfig.getServletContext());
        bw.registerCustomEditor(Resource.class, new ResourceEditor(resourceLoader, this.environment));
        initBeanWrapper(bw);
        bw.setPropertyValues(pvs, true);
    }
    catch (BeansException ex) {
        String msg = "Failed to set bean properties on filter '" +
            filterConfig.getFilterName() + "': " + ex.getMessage();
        logger.error(msg, ex);
        throw new NestedServletException(msg, ex);
    }

    // Let subclasses do whatever initialization they like.
    initFilterBean();

    if (logger.isDebugEnabled()) {
        logger.debug("Filter '" + filterConfig.getFilterName() + "' configured successfully");
    }
}

@Override
protected void initContext(FilterConfig config) throws ServletException {

     try {
         PropertyValues pvs = new FilterConfigPropertyValues(getFilterConfig(), requiredProperties);
         BeanWrapper bw = PropertyAccessorFactory.forBeanPropertyAccess(this);
         ResourceLoader resourceLoader = new ServletContextResourceLoader(getServletContext());
         bw.registerCustomEditor(Resource.class, new ResourceEditor(resourceLoader));
         initBeanWrapper(bw);
         bw.setPropertyValues(pvs, true);
     } catch (Exception e) {
         throw new ServletException("Failed to set bean properties on filter: " + getFilterName(), e);
     }

    }

@PostConstruct
public void init() {
    if (this.resourceLoader == null) {
        this.resourceLoader = new ServletContextResourceLoader(servletContext);
    }
}