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package com.c2kernel.process.resource;
//Java
import java.net.MalformedURLException;
import java.net.URL;
import java.util.Enumeration;
import java.util.HashMap;
import java.util.Hashtable;
import com.c2kernel.common.InvalidDataException;
import com.c2kernel.common.ObjectNotFoundException;
import com.c2kernel.utils.FileStringUtility;
import com.c2kernel.utils.Logger;
/**************************************************************************
*
* @author $Author: abranson $ $Date: 2005/10/05 07:39:36 $
* @version $Revision: 1.71 $
**************************************************************************/
public class Resource implements ResourceLoader {
private final Hashtable<String, String> txtCache = new Hashtable<String, String>();
private final URL baseURL;
private final HashMap<String, URL> moduleBaseURLs = new HashMap<String, URL>();
private final HashMap<String, URL> allBaseURLs = new HashMap<String, URL>();
public Resource() throws InvalidDataException {
baseURL = getURLorResURL("com/c2kernel/utils/resources/");
allBaseURLs.put(null, baseURL);
}
/* (non-Javadoc)
* @see com.c2kernel.utils.ResourceLoader#getKernelBaseURL()
*/
@Override
public URL getKernelBaseURL() {
return baseURL;
}
@Override
public Class<?> getClassForName(String name) throws ClassNotFoundException {
return Class.forName(name);
}
/* (non-Javadoc)
* @see com.c2kernel.utils.ResourceLoader#getKernelResourceURL(java.lang.String)
*/
@Override
public URL getKernelResourceURL(String resName) throws MalformedURLException {
return new URL(baseURL, resName);
}
/* (non-Javadoc)
* @see com.c2kernel.utils.ResourceLoader#addModuleBaseURL(java.lang.String, java.net.URL)
*/
@Override
public void addModuleBaseURL(String ns, URL newBaseURL) {
moduleBaseURLs.put(ns, newBaseURL);
allBaseURLs.put(ns, newBaseURL);
Logger.msg("Adding resource URL for "+ns+": "+newBaseURL.toString());
}
/* (non-Javadoc)
* @see com.c2kernel.utils.ResourceLoader#addModuleBaseURL(java.lang.String, java.lang.String)
*/
@Override
public void addModuleBaseURL(String ns, String newBaseURL) throws InvalidDataException {
addModuleBaseURL(ns, getURLorResURL(newBaseURL));
}
/* (non-Javadoc)
* @see com.c2kernel.utils.ResourceLoader#getModuleBaseURLs()
*/
@Override
public HashMap<String, URL> getModuleBaseURLs() {
return moduleBaseURLs;
}
private HashMap<String, URL> getAllBaseURLs() {
return allBaseURLs;
}
/* (non-Javadoc)
* @see com.c2kernel.utils.ResourceLoader#getModuleResourceURL(java.lang.String, java.lang.String)
*/
@Override
public URL getModuleResourceURL(String ns, String resName) throws MalformedURLException {
return new URL(moduleBaseURLs.get(ns), resName);
}
static private URL getURLorResURL(String newURL) throws InvalidDataException {
URL result;
try {
result = new URL(newURL);
} catch (java.net.MalformedURLException ex) {
//it is assumed that a 'wrong' URL denotes a directory
//of files resolvable from the CLASSPATH
result = Resource.class.getClassLoader().getResource(newURL);
}
if (result == null) {
Logger.error("URL "+newURL+" could not be found");
throw new InvalidDataException();
}
return result;
}
/* (non-Javadoc)
* @see com.c2kernel.utils.ResourceLoader#findTextResource(java.lang.String)
*/
@Override
public String findTextResource(String resName) {
for (String ns : getAllBaseURLs().keySet()) {
try {
return getTextResource(ns, resName);
} catch (ObjectNotFoundException ex) { }
}
Logger.warning("Text resource '"+resName+"' not found.");
return null;
}
/* (non-Javadoc)
* @see com.c2kernel.utils.ResourceLoader#getAllTextResources(java.lang.String)
*/
@Override
public HashMap<String, String> getAllTextResources(String resName) {
HashMap<String, String> results = new HashMap<String, String>();
for (String ns : getAllBaseURLs().keySet()) {
try {
results.put(ns, getTextResource(ns, resName));
} catch (ObjectNotFoundException ex) { }
}
return results;
}
/* (non-Javadoc)
* @see com.c2kernel.utils.ResourceLoader#getTextResource(java.lang.String, java.lang.String)
*/
@Override
public String getTextResource(String ns, String resName) throws ObjectNotFoundException
// throws IOException
{
Logger.msg(8, "Resource::getTextResource() - Getting resource from "+ns+": " + resName);
if (txtCache.containsKey(ns+'/'+resName)) {
return txtCache.get(ns+'/'+resName);
}
try {
String newRes = null;
URL loc;
if (ns == null) // kernel
loc = getKernelResourceURL(resName);
else
loc = getModuleResourceURL(ns, resName);
Logger.msg(5, "Loading resource: "+loc.toString());
newRes = FileStringUtility.url2String(loc);
txtCache.put(ns+'/'+resName, newRes);
return newRes;
} catch (Exception e) {
throw new ObjectNotFoundException(e.getMessage(),null);
}
}
@Override
public Enumeration<URL> getModuleDefURLs() throws Exception {
return ClassLoader.getSystemResources("META-INF/cristal/module.xml");
}
}
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