Examples with ResourceMissingException org.apereo.portal.ResourceMissingException used on opensource projects

Example 1 with ResourceMissingException

use of org.apereo.portal.ResourceMissingException in project uPortal by Jasig.

the class ResourceLoader method getResourceAsURL.

/**
     * Finds a resource with a given name. This is a convenience method for accessing a resource
     * from a channel or from the uPortal framework. If a well-formed URL is passed in, this method
     * will use that URL unchanged to find the resource. If the URL is not well-formed, this method
     * will look for the desired resource relative to the classpath. If the resource name starts
     * with "/", it is unchanged. Otherwise, the package name of the requesting class is prepended
     * to the resource name.
     *
     * @param requestingClass the java.lang.Class object of the class that is attempting to load the
     *     resource
     * @param resource a String describing the full or partial URL of the resource to load
     * @return a URL identifying the requested resource
     * @throws ResourceMissingException
     */
public static URL getResourceAsURL(Class<?> requestingClass, String resource) throws ResourceMissingException {
    final Tuple<Class<?>, String> cacheKey = new Tuple<Class<?>, String>(requestingClass, resource);
    //Look for a cached URL
    final Map<Tuple<Class<?>, String>, URL> resourceUrlCache = ResourceLoader.resourceUrlCache;
    URL resourceURL = resourceUrlCache != null ? resourceUrlCache.get(cacheKey) : null;
    if (resourceURL != null) {
        return resourceURL;
    }
    //Look for a failed lookup
    final Map<Tuple<Class<?>, String>, ResourceMissingException> resourceUrlNotFoundCache = ResourceLoader.resourceUrlNotFoundCache;
    ResourceMissingException exception = resourceUrlNotFoundCache != null ? resourceUrlNotFoundCache.get(cacheKey) : null;
    if (exception != null) {
        throw new ResourceMissingException(exception);
    }
    try {
        resourceURL = new URL(resource);
    } catch (MalformedURLException murle) {
        // URL is invalid, now try to load from classpath
        resourceURL = requestingClass.getResource(resource);
        if (resourceURL == null) {
            String resourceRelativeToClasspath = null;
            if (resource.startsWith("/"))
                resourceRelativeToClasspath = resource;
            else
                resourceRelativeToClasspath = '/' + requestingClass.getPackage().getName().replace('.', '/') + '/' + resource;
            exception = new ResourceMissingException(resource, resourceRelativeToClasspath, "Resource not found in classpath: " + resourceRelativeToClasspath);
            if (resourceUrlNotFoundCache != null) {
                resourceUrlNotFoundCache.put(cacheKey, exception);
            }
            throw new ResourceMissingException(exception);
        }
    }
    if (resourceUrlCache != null) {
        resourceUrlCache.put(cacheKey, resourceURL);
    }
    return resourceURL;
}