01: /*
02: * Copyright 2002-2006 the original author or authors.
03: *
04: * Licensed under the Apache License, Version 2.0 (the "License");
05: * you may not use this file except in compliance with the License.
06: * You may obtain a copy of the License at
07: *
08: * http://www.apache.org/licenses/LICENSE-2.0
09: *
10: * Unless required by applicable law or agreed to in writing, software
11: * distributed under the License is distributed on an "AS IS" BASIS,
12: * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13: * See the License for the specific language governing permissions and
14: * limitations under the License.
15: */
16:
17: package org.springframework.aop;
18:
19: import java.io.Serializable;
20:
21: /**
22: * Canonical Pointcut instance that always matches.
23: *
24: * @author Rod Johnson
25: */
26: class TruePointcut implements Pointcut, Serializable {
27:
28: public static final TruePointcut INSTANCE = new TruePointcut();
29:
30: /**
31: * Enforce Singleton pattern.
32: */
33: private TruePointcut() {
34: }
35:
36: public ClassFilter getClassFilter() {
37: return ClassFilter.TRUE;
38: }
39:
40: public MethodMatcher getMethodMatcher() {
41: return MethodMatcher.TRUE;
42: }
43:
44: /**
45: * Required to support serialization. Replaces with canonical
46: * instance on deserialization, protecting Singleton pattern.
47: * Alternative to overriding <code>equals()</code>.
48: */
49: private Object readResolve() {
50: return INSTANCE;
51: }
52:
53: public String toString() {
54: return "Pointcut.TRUE";
55: }
56:
57: }
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