1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
|
/*
* 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.tools.ant.types.resources.comparators;
import java.util.Stack;
import org.apache.tools.ant.BuildException;
import org.apache.tools.ant.Project;
import org.apache.tools.ant.types.DataType;
import org.apache.tools.ant.types.Resource;
/**
* Reverses another ResourceComparator. If no nested ResourceComparator
* is supplied, the compared Resources' natural order will be reversed.
* @since Ant 1.7
*/
public class Reverse extends ResourceComparator {
private static final String ONE_NESTED
= "You must not nest more than one ResourceComparator for reversal.";
private ResourceComparator nested;
/**
* Default constructor.
*/
public Reverse() {
}
/**
* Construct a new Reverse, supplying the ResourceComparator to be reversed.
* @param c the ResourceComparator to reverse.
*/
public Reverse(ResourceComparator c) {
add(c);
}
/**
* Add the ResourceComparator to reverse.
* @param c the ResourceComparator to add.
*/
public void add(ResourceComparator c) {
if (nested != null) {
throw new BuildException(ONE_NESTED);
}
nested = c;
setChecked(false);
}
/**
* Compare two Resources.
* @param foo the first Resource.
* @param bar the second Resource.
* @return a negative integer, zero, or a positive integer as the first
* argument is greater than, equal to, or less than the second.
*/
protected int resourceCompare(Resource foo, Resource bar) {
return -1 * (nested == null
? foo.compareTo(bar) : nested.compare(foo, bar));
}
protected void dieOnCircularReference(Stack<Object> stk, Project p)
throws BuildException {
if (isChecked()) {
return;
}
if (isReference()) {
super.dieOnCircularReference(stk, p);
} else {
if (nested instanceof DataType) {
pushAndInvokeCircularReferenceCheck((DataType) nested, stk,
p);
}
setChecked(true);
}
}
}
|
