package org.g4studio.core.resource.impl;
import java.util.HashMap;
import java.util.Map;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.g4studio.core.resource.ResourceException;
import org.g4studio.core.resource.ResourceLoader;
import org.g4studio.core.resource.loader.ClasspathResourceLoader;
import org.g4studio.core.resource.loader.DynamicResourceLoader;
import org.g4studio.core.resource.loader.FileResourceLoader;
import org.g4studio.core.resource.loader.MD5ClasspathResourceLoader;
import org.g4studio.core.resource.support.LoaderMapping;
/**
* DefaultLoaderMapping
*
* @author HuangYunHui|XiongChun
* @since 2009-05-8
*/
public class DefaultLoaderMapping implements LoaderMapping {
private final Log logger = LogFactory.getLog(this.getClass());
private final static FileResourceLoader file = new FileResourceLoader();
private final static ClasspathResourceLoader classpath = new ClasspathResourceLoader();
private final static MD5ClasspathResourceLoader md5classpath = new MD5ClasspathResourceLoader();
private final static DynamicResourceLoader dynamic = new DynamicResourceLoader();
private static Map loaders = new HashMap();
static {
loaders.put("file", file);
loaders.put("classpath", classpath);
loaders.put("md5classpath", md5classpath);
loaders.put("dynamic", dynamic);
}
public void put(String pLoaderName, ResourceLoader pLoader) {
loaders.put(pLoaderName, pLoader);
}
public ResourceLoader mapping(String pName) throws ResourceException {
if (pName == null) {
throw new NullPointerException("资源Loader名称不能为空null");
}
logger.debug("获取名字为：" + pName + "的资源Loader.");
String handlerName = pName.toLowerCase();
if (loaders.containsKey(handlerName) == false) {
throw new ResourceException("不存在名为：" + pName + "的资源Loader");
}
ResourceLoader result = (ResourceLoader) loaders.get(handlerName);
logger.debug("获取到名字为：" + pName + "的资源Loader.");
return result;
}
}