org.zkoss.util.resource
Interface Loader

All Known Implementing Classes:

AbstractLoader, ContentLoader

public interface Loader

A loader that could load a resource to another format. It is mainly designed to work with ResourceCache.

Author:

tomyeh

Method Summary

long	getLastModified(java.lang.Object src) Returns the last modified time, or -1 if reload is required or not exists.
java.lang.Object	load(java.lang.Object src) Loads the resource.
boolean	shallCheck(java.lang.Object src, long expiredMillis) Returns whether to call getLastModified(java.lang.Object).

Method Detail

shallCheck

boolean shallCheck(java.lang.Object src,
                   long expiredMillis)

Returns whether to call getLastModified(java.lang.Object). If false, it assumes the current cached content is up-to-date.

Parameters:

expiredMillis - how many milli-seconds are expired after the last check. In most cases, just return true if expiredMillis > 0

getLastModified

long getLastModified(java.lang.Object src)

Returns the last modified time, or -1 if reload is required or not exists.

load

java.lang.Object load(java.lang.Object src)
                      throws java.lang.Exception

Loads the resource.

Returns:

null if not found

Throws:

java.lang.Exception - you might throw any exception which will be passed back to the caller of ResourceCache.get(java.lang.Object)