/// <summary> Takes an existing resource, and 'refreshes' it. This
/// generally means that the source of the resource is checked
/// for changes according to some cache/check algorithm
/// and if the resource changed, then the resource data is
/// reloaded and re-parsed.
/// *
/// </summary>
/// <param name="resource">resource to refresh
/// *
/// @throws ResourceNotFoundException if template not found
/// from current source for this Resource
/// @throws ParseErrorException if template cannot be parsed due
/// to syntax (or other) error.
/// @throws Exception if a problem in parse
///
/// </param>
/// <param name="encoding"></param>
protected internal void RefreshResource(Resource resource, String encoding)
{
/*
* The resource knows whether it needs to be checked
* or not, and the resource's loader can check to
* see if the source has been modified. If both
* these conditions are true then we must reload
* the input stream and parse it to make a new
* AST for the resource.
*/
if (resource.RequiresChecking())
{
/*
* touch() the resource to reset the counters
*/
resource.Touch();
if (resource.IsSourceModified())
{
/*
* now check encoding info. It's possible that the newly declared
* encoding is different than the encoding already in the resource
* this strikes me as bad...
*/
if (!resource.Encoding.Equals(encoding))
{
runtimeServices.Error(
string.Format("Declared encoding for template '{0}' is different on reload. Old = '{1}' New = '{2}",
resource.Name, resource.Encoding, encoding));
resource.Encoding = encoding;
}
/*
* read how old the resource is _before_
* processing (=>reading) it
*/
long howOldItWas = resource.ResourceLoader.GetLastModified(resource);
/*
* read in the fresh stream and parse
*/
resource.Process();
/*
* now set the modification info and reset
* the modification check counters
*/
resource.LastModified = howOldItWas;
}
}
}
/// <summary> Takes an existing resource, and 'refreshes' it. This
/// generally means that the source of the resource is checked
/// for changes according to some cache/check algorithm
/// and if the resource changed, then the resource data is
/// reloaded and re-parsed.
/// *
/// </summary>
/// <param name="resource">resource to refresh
/// *
/// @throws ResourceNotFoundException if template not found
/// from current source for this Resource
/// @throws ParseErrorException if template cannot be parsed due
/// to syntax (or other) error.
/// @throws Exception if a problem in parse
///
/// </param>
/// <param name="encoding"></param>
protected internal void RefreshResource(Resource resource, String encoding)
{
/*
* The resource knows whether it needs to be checked
* or not, and the resource's loader can check to
* see if the source has been modified. If both
* these conditions are true then we must reload
* the input stream and parse it to make a new
* AST for the resource.
*/
if (resource.RequiresChecking())
{
/*
* touch() the resource to reset the counters
*/
resource.Touch();
if (resource.IsSourceModified())
{
/*
* now check encoding info. It's possible that the newly declared
* encoding is different than the encoding already in the resource
* this strikes me as bad...
*/
if (!resource.Encoding.Equals(encoding))
{
runtimeServices.Error(
string.Format("Declared encoding for template '{0}' is different on reload. Old = '{1}' New = '{2}",
resource.Name, resource.Encoding, encoding));
resource.Encoding = encoding;
}
/*
* read how old the resource is _before_
* processing (=>reading) it
*/
long howOldItWas = resource.ResourceLoader.GetLastModified(resource);
/*
* read in the fresh stream and parse
*/
resource.Process();
/*
* now set the modification info and reset
* the modification check counters
*/
resource.LastModified = howOldItWas;
}
}
}
/// <summary>
/// Loads a resource from the current set of resource loaders
/// </summary>
/// <param name="resourceName">The name of the resource to retrieve.</param>
/// <param name="resourceType">The type of resource (<code>Template</code>,
/// <code>Content</code>, etc.).
/// </param>
/// <param name="encoding"> The character encoding to use.</param>
/// <returns>Resource with the template parsed and ready.
/// @throws ResourceNotFoundException if template not found
/// from any available source.
/// @throws ParseErrorException if template cannot be parsed due
/// to syntax (or other) error.
/// @throws Exception if a problem in parse
/// </returns>
protected internal Resource LoadResource(String resourceName, ResourceType resourceType, String encoding)
{
Resource resource = ResourceFactory.GetResource(resourceName, resourceType);
resource.RuntimeServices = runtimeServices;
resource.Name = resourceName;
resource.Encoding = encoding;
/*
* Now we have to try to find the appropriate
* loader for this resource. We have to cycle through
* the list of available resource loaders and see
* which one gives us a stream that we can use to
* make a resource with.
*/
long howOldItWas = 0; // Initialize to avoid warnings
ResourceLoader resourceLoader = null;
for (int i = 0; i < resourceLoaders.Count; i++)
{
resourceLoader = (ResourceLoader)resourceLoaders[i];
resource.ResourceLoader = resourceLoader;
/*
* catch the ResourceNotFound exception
* as that is ok in our new multi-loader environment
*/
try
{
if (resource.Process())
{
/*
* FIXME (gmj)
* moved in here - technically still
* a problem - but the resource needs to be
* processed before the loader can figure
* it out due to to the new
* multi-path support - will revisit and fix
*/
if (logWhenFound)
{
runtimeServices.Info(
string.Format("ResourceManager : found {0} with loader {1}", resourceName, resourceLoader.ClassName));
}
howOldItWas = resourceLoader.GetLastModified(resource);
break;
}
}
catch (ResourceNotFoundException)
{
/*
* that's ok - it's possible to fail in
* multi-loader environment
*/
}
}
/*
* Return null if we can't find a resource.
*/
if (resource.Data == null)
{
throw new ResourceNotFoundException(string.Format("Unable to find resource '{0}'", resourceName));
}
/*
* some final cleanup
*/
resource.LastModified = howOldItWas;
resource.ModificationCheckInterval = resourceLoader.ModificationCheckInterval;
resource.Touch();
return(resource);
}
