package com.cloudhopper.commons.rfs;
/*
* #%L
* ch-commons-rfs
* %%
* Copyright (C) 2012 - 2013 Cloudhopper by Twitter
* %%
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
* #L%
*/
import com.cloudhopper.commons.rfs.provider.BaseRemoteFileSystem;
import com.cloudhopper.commons.util.URL;
import com.cloudhopper.commons.util.URLParser;
import java.net.MalformedURLException;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* Factory for creating remote filesystems from a URL.
*
* @author joelauer
*/
public class RemoteFileSystemFactory {
private static final Logger logger = LoggerFactory.getLogger(RemoteFileSystemFactory.class);
private RemoteFileSystemFactory() {
// only static methods
}
/**
* Creates a new RemoteFileSystem by parsing the URL and creating the
* correct underlying provider to support the protocol.
*/
public static RemoteFileSystem create(String url) throws MalformedURLException, FileSystemException {
// parse url into a URL object
URL r = URLParser.parse(url);
// delegate responsibility to other method
return create(r);
}
public static RemoteFileSystem create(URL url) throws MalformedURLException, FileSystemException {
// try to match the url to a provider
Protocol protocol = Protocol.findByName(url.getProtocol());
if (protocol == null) {
throw new MalformedURLException("Unsupported virtual filesystem protocol '" + url.getProtocol() + "'");
}
// create a new instance of the provider and return it
BaseRemoteFileSystem vfs = null;
try {
Class vfsClass = protocol.getProvider();
// create a new instance, cast it
vfs = (BaseRemoteFileSystem)vfsClass.newInstance();
} catch (Exception e) {
throw new FileSystemException("Could not create instance of " + protocol.getProvider(), e);
}
// setup any common properties
vfs.setURL(url);
vfs.setProtocol(protocol);
// validate the properties
vfs.validateURL();
return vfs;
}
}