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// Copyright (C) 2001-2003 Jon A. Maxwell (JAM)
//
// This library is free software; you can redistribute it and/or
// modify it under the terms of the GNU Lesser General Public
// License as published by the Free Software Foundation; either
// version 2.1 of the License, or (at your option) any later version.
//
// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
// Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public
// License along with this library; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
package net.sourceforge.jnlp.services;
import java.io.*;
import java.net.*;
import java.util.*;
import java.lang.ref.*;
import javax.jnlp.*;
import net.sourceforge.jnlp.*;
import net.sourceforge.jnlp.cache.*;
import net.sourceforge.jnlp.runtime.*;
/**
* The BasicService JNLP service.
*
* @author <a href="mailto:jmaxwell@users.sourceforge.net">Jon A. Maxwell (JAM)</a> - initial author
* @version $Revision: 1.7 $
*/
class XPersistenceService implements PersistenceService {
// todo: recheck delete, etc to make sure security is tight
protected XPersistenceService() {
}
/**
* Checks whether the application has access to URL area
* requested. If the method returns normally then the specified
* location can be accessed by the current application.
*
* @throws MalformedURLException if the application cannot access the location
*/
protected void checkLocation(URL location) throws MalformedURLException {
ApplicationInstance app = JNLPRuntime.getApplication();
if (app == null)
throw new MalformedURLException("Cannot determine the current application.");
URL source = app.getJNLPFile().getCodeBase();
if (!source.getHost().equalsIgnoreCase(location.getHost()))
throw new MalformedURLException("Cannot access data from a different host.");
// test for above codebase, not perfect but works for now
String requestPath = location.getFile();
if (-1 != requestPath.lastIndexOf("/"))
requestPath = requestPath.substring(0, requestPath.lastIndexOf("/"));
else
requestPath = "";
if (JNLPRuntime.isDebug()) {
System.out.println("codebase path: "+source.getFile());
System.out.println("request path: "+requestPath);
}
if (!source.getFile().startsWith(requestPath))
throw new MalformedURLException("Cannot access data below source URL path.");
}
/**
* Converts a URL into a file in the persistence store.
*
* @return the file
*/
protected File toCacheFile(URL location) throws MalformedURLException {
return CacheUtil.urlToPath(location, "pcache");
}
/**
*
* @return the maximum size of storage that got granted, in bytes
* @throws MalformedURLException if the application cannot access the location
*/
public long create(URL location, long maxsize) throws MalformedURLException, IOException {
checkLocation(location);
File file = toCacheFile(location);
file.getParentFile().mkdirs();
if (!file.createNewFile())
throw new IOException("File already exists.");
return maxsize;
}
/**
*
* @throws MalformedURLException if the application cannot access the location
*/
public void delete(URL location) throws MalformedURLException, IOException {
checkLocation(location);
toCacheFile(location).delete();
}
/**
*
* @throws MalformedURLException if the application cannot access the location
*/
public FileContents get(URL location) throws MalformedURLException, IOException, FileNotFoundException {
checkLocation(location);
File file = toCacheFile(location);
if (!file.exists())
throw new FileNotFoundException("Persistence store for "
+ location.toString() + " is not found.");
file.getParentFile().mkdirs();
return (FileContents) ServiceUtil.createPrivilegedProxy(FileContents.class, new XFileContents(file));
}
/**
*
* @throws MalformedURLException if the application cannot access the location
*/
public String[] getNames(URL location) throws MalformedURLException, IOException {
checkLocation(location);
File file = toCacheFile(location);
if (!file.isDirectory())
return new String[0];
List result = new ArrayList();
// check whether this is right: only add files and not directories.
File entries[] = file.listFiles();
for (int i=0; i < entries.length; i++)
if (entries[i].isFile())
result.add(entries[i].getName());
return (String[]) result.toArray(new String[result.size()]);
}
/**
*
* @throws MalformedURLException if the application cannot access the location
*/
public int getTag(URL location) throws MalformedURLException, IOException {
checkLocation(location);
// todo: actually implement tags
if (toCacheFile(location).exists())
return PersistenceService.CACHED;
return PersistenceService.CACHED;
}
/**
*
* @throws MalformedURLException if the application cannot access the location
*/
public void setTag(URL location, int tag) throws MalformedURLException, IOException {
checkLocation(location);
// todo: actually implement tags
}
}
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