| /* |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You 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. |
| */ |
| package org.apache.commons.vfs2.provider.url; |
| |
| import java.net.MalformedURLException; |
| import java.net.URL; |
| import java.util.Arrays; |
| import java.util.Collection; |
| import java.util.Collections; |
| |
| import org.apache.commons.vfs2.Capability; |
| import org.apache.commons.vfs2.FileName; |
| import org.apache.commons.vfs2.FileObject; |
| import org.apache.commons.vfs2.FileSystem; |
| import org.apache.commons.vfs2.FileSystemConfigBuilder; |
| import org.apache.commons.vfs2.FileSystemException; |
| import org.apache.commons.vfs2.FileSystemOptions; |
| import org.apache.commons.vfs2.provider.AbstractFileProvider; |
| |
| /** |
| * A file provider backed by Java's URL API. |
| */ |
| public class UrlFileProvider |
| extends AbstractFileProvider |
| { |
| /** The provider's capabilities */ |
| protected static final Collection<Capability> capabilities = |
| Collections.unmodifiableCollection(Arrays.asList(new Capability[] |
| { |
| Capability.READ_CONTENT, |
| Capability.URI, |
| Capability.GET_LAST_MODIFIED |
| })); |
| |
| public UrlFileProvider() |
| { |
| super(); |
| setFileNameParser(new UrlFileNameParser()); |
| } |
| |
| /** |
| * Locates a file object, by absolute URI. |
| * @param baseFile The base FileObject. |
| * @param uri The uri of the file to locate. |
| * @param fileSystemOptions The FileSystemOptions |
| * @return The FileObject |
| * @throws FileSystemException if an error occurs. |
| */ |
| @Override |
| public synchronized FileObject findFile(final FileObject baseFile, |
| final String uri, |
| final FileSystemOptions fileSystemOptions) |
| throws FileSystemException |
| { |
| try |
| { |
| final URL url = new URL(uri); |
| |
| final URL rootUrl = new URL(url, "/"); |
| final String key = this.getClass().getName() + rootUrl.toString(); |
| FileSystem fs = findFileSystem(key, fileSystemOptions); |
| if (fs == null) |
| { |
| final String extForm = rootUrl.toExternalForm(); |
| final FileName rootName = |
| getContext().parseURI(extForm); |
| // final FileName rootName = |
| // new BasicFileName(rootUrl, FileName.ROOT_PATH); |
| fs = new UrlFileSystem(rootName, fileSystemOptions); |
| addFileSystem(key, fs); |
| } |
| return fs.resolveFile(url.getPath()); |
| } |
| catch (final MalformedURLException e) |
| { |
| throw new FileSystemException("vfs.provider.url/badly-formed-uri.error", uri, e); |
| } |
| } |
| |
| @Override |
| public FileSystemConfigBuilder getConfigBuilder() |
| { |
| return org.apache.commons.vfs2.provider.res.ResourceFileSystemConfigBuilder.getInstance(); |
| } |
| |
| @Override |
| public Collection<Capability> getCapabilities() |
| { |
| return capabilities; |
| } |
| } |