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.selectors;
19:
20: import org.apache.tools.ant.types.Resource;
21:
22: /**
23: * Not ResourceSelector.
24: * @since Ant 1.7
25: */
26: public class Not implements ResourceSelector {
27:
28: private ResourceSelector sel;
29:
30: /**
31: * Default constructor.
32: */
33: public Not() {
34: }
35:
36: /**
37: * Convenience constructor.
38: * @param s the ResourceSelector to negate.
39: */
40: public Not(ResourceSelector s) {
41: add(s);
42: }
43:
44: /**
45: * Set the ResourceSelector.
46: * @param s the ResourceSelector to negate.
47: * @throws IllegalStateException if already set.
48: */
49: public void add(ResourceSelector s) {
50: if (sel != null) {
51: throw new IllegalStateException(
52: "The Not ResourceSelector accepts a single nested ResourceSelector");
53: }
54: sel = s;
55: }
56:
57: /**
58: * Return true if this Resource is selected.
59: * @param r the Resource to check.
60: * @return whether the Resource was selected.
61: */
62: public boolean isSelected(Resource r) {
63: return !(sel.isSelected(r));
64: }
65:
66: }
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