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: */
18: package org.apache.tools.ant.types.resources.comparators;
19:
20: import java.io.File;
21: import org.apache.tools.ant.types.Resource;
22: import org.apache.tools.ant.types.resources.FileResource;
23: import org.apache.tools.ant.util.FileUtils;
24:
25: /**
26: * Compares filesystem Resources.
27: * @since Ant 1.7
28: */
29: public class FileSystem extends ResourceComparator {
30: private static final FileUtils FILE_UTILS = FileUtils
31: .getFileUtils();
32:
33: /**
34: * Compare two Resources.
35: * @param foo the first Resource.
36: * @param bar the second Resource.
37: * @return a negative integer, zero, or a positive integer as the first
38: * argument is less than, equal to, or greater than the second.
39: * @throws ClassCastException if either resource is not an instance of FileResource.
40: */
41: protected int resourceCompare(Resource foo, Resource bar) {
42: File foofile = ((FileResource) foo).getFile();
43: File barfile = ((FileResource) bar).getFile();
44: return foofile.equals(barfile) ? 0 : FILE_UTILS.isLeadingPath(
45: foofile, barfile) ? -1 : FILE_UTILS.normalize(
46: foofile.getAbsolutePath()).compareTo(
47: FILE_UTILS.normalize(barfile.getAbsolutePath()));
48: }
49:
50: }
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