1# Copyright (C) 2010 Google Inc. All rights reserved.
2#
3# Redistribution and use in source and binary forms, with or without
4# modification, are permitted provided that the following conditions
5# are met:
6#
7# 1.  Redistributions of source code must retain the above copyright
8#     notice, this list of conditions and the following disclaimer.
9# 2.  Redistributions in binary form must reproduce the above copyright
10#     notice, this list of conditions and the following disclaimer in the
11#     documentation and/or other materials provided with the distribution.
12#
13# THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
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23
24from webkitpy.common.system.filesystem import FileSystem
25
26
27class FileSetFileHandle(object):
28    """Points to a file that resides in a file set"""
29    def __init__(self, fileset, filename, filesystem=None):
30        self._filename = filename
31        self._fileset = fileset
32        self._contents = None
33        self._filesystem = filesystem or FileSystem()
34
35    def __str__(self):
36        return "%s:%s" % (self._fileset, self._filename)
37
38    def close(self):
39        pass
40
41    def contents(self):
42        if self._contents is None:
43            self._contents = self._fileset.read(self._filename)
44        return self._contents
45
46    def save_to(self, path, filename=None):
47        if filename is None:
48            self._fileset.extract(self._filename, path)
49            return
50        with self._filesystem.mkdtemp() as temp_dir:
51            self._fileset.extract(self._filename, temp_dir)
52
53            src = self._filesystem.join(temp_dir, self._filename)
54            dest = self._filesystem.join(path, filename)
55            self._filesystem.copyfile(src, dest)
56
57    def delete(self):
58        self._fileset.delete(self._filename)
59
60    def name(self):
61        return self._filename
62
63    def splitext(self):
64        return self._filesystem.splitext(self.name())
65