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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
14# EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
15# WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
16# DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
17# DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
18# (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
19# LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
20# ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
21# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
22# THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
23
24from __future__ import with_statement
25
26from webkitpy.common.system.filesystem import FileSystem
27
28
29class FileSetFileHandle(object):
30    """Points to a file that resides in a file set"""
31    def __init__(self, fileset, filename, filesystem=None):
32        self._filename = filename
33        self._fileset = fileset
34        self._contents = None
35        self._filesystem = filesystem or FileSystem()
36
37    def __str__(self):
38        return "%s:%s" % (self._fileset, self._filename)
39
40    def close(self):
41        pass
42
43    def contents(self):
44        if self._contents is None:
45            self._contents = self._fileset.read(self._filename)
46        return self._contents
47
48    def save_to(self, path, filename=None):
49        if filename is None:
50            self._fileset.extract(self._filename, path)
51            return
52        with self._filesystem.mkdtemp() as temp_dir:
53            self._fileset.extract(self._filename, temp_dir)
54
55            src = self._filesystem.join(temp_dir, self._filename)
56            dest = self._filesystem.join(path, filename)
57            self._filesystem.copyfile(src, dest)
58
59    def delete(self):
60        self._fileset.delete(self._filename)
61
62    def name(self):
63        return self._filename
64
65    def splitext(self):
66        return self._filesystem.splitext(self.name())
67