01: /*
02: * Licensed to the Apache Software Foundation (ASF) under one or more
03: * contributor license agreements. See the NOTICE file distributed with
04: * this work for additional information regarding copyright ownership.
05: * The ASF licenses this file to You under the Apache License, Version 2.0
06: * (the "License"); you may not use this file except in compliance with
07: * the License. You may obtain a copy of the License at
08: *
09: * http://www.apache.org/licenses/LICENSE-2.0
10: *
11: * Unless required by applicable law or agreed to in writing, software
12: * distributed under the License is distributed on an "AS IS" BASIS,
13: * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14: * See the License for the specific language governing permissions and
15: * limitations under the License.
16: */
17: package org.apache.commons.vfs.provider;
18:
19: import org.apache.commons.vfs.FileObject;
20: import org.apache.commons.vfs.FileSystemException;
21: import org.apache.commons.vfs.FileSystemOptions;
22:
23: /**
24: * Description
25: *
26: * @author <a href="mailto:imario@apache.org">Mario Ivankovits</a>
27: * @version $Revision: 480428 $ $Date: 2006-11-28 22:15:24 -0800 (Tue, 28 Nov 2006) $
28: */
29: public abstract class CompositeFileProvider extends
30: AbstractFileProvider {
31: public CompositeFileProvider() {
32: super ();
33: }
34:
35: /**
36: * The schemes to use for resolve
37: */
38: protected abstract String[] getSchemes();
39:
40: /**
41: * Locates a file object, by absolute URI.
42: */
43: public FileObject findFile(final FileObject baseFile,
44: final String uri, final FileSystemOptions fileSystemOptions)
45: throws FileSystemException {
46: StringBuffer buf = new StringBuffer(80);
47:
48: UriParser.extractScheme(uri, buf);
49:
50: String[] schemes = getSchemes();
51: for (int iterSchemes = 0; iterSchemes < schemes.length; iterSchemes++) {
52: buf.insert(0, ":");
53: buf.insert(0, schemes[iterSchemes]);
54: }
55:
56: FileObject fo = getContext().getFileSystemManager()
57: .resolveFile(buf.toString(), fileSystemOptions);
58: return fo;
59: }
60: }
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