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Java > Open Source Codes > org > jboss > aop > expressions > MethodExpression


1 /*
2   * JBoss, Home of Professional Open Source
3   * Copyright 2005, JBoss Inc., and individual contributors as indicated
4   * by the @authors tag. See the copyright.txt in the distribution for a
5   * full listing of individual contributors.
6   *
7   * This is free software; you can redistribute it and/or modify it
8   * under the terms of the GNU Lesser General Public License as
9   * published by the Free Software Foundation; either version 2.1 of
10   * the License, or (at your option) any later version.
11   *
12   * This software is distributed in the hope that it will be useful,
13   * but WITHOUT ANY WARRANTY; without even the implied warranty of
14   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15   * Lesser General Public License for more details.
16   *
17   * You should have received a copy of the GNU Lesser General Public
18   * License along with this software; if not, write to the Free
19   * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
20   * 02110-1301 USA, or see the FSF site: http://www.fsf.org.
21   */
22 package org.jboss.aop.expressions;
23
24 import javassist.CtMethod;
25 import javassist.NotFoundException;
26
27 import java.lang.reflect.Method JavaDoc;
28 import java.util.regex.Matcher JavaDoc;
29 import java.util.regex.Pattern JavaDoc;
30
31 /**
32  * Comment
33  *
34  * @author <a HREF="mailto:bill@jboss.org">Bill Burke</a>
35  * @version $Revision: 37406 $
36  *
37  **/
38 public class MethodExpression
39 {
40    protected static final Pattern JavaDoc PATTERN = Pattern.compile("(.*)\\s+(.*)\\((.*)\\)");
41    public String JavaDoc originalExpression;
42    public ParameterExpression params;
43    public Pattern JavaDoc methodNameExpr;
44    public String JavaDoc methodName;
45    public String JavaDoc returnString;
46    public Pattern JavaDoc returnExpr;
47
48    public MethodExpression(String JavaDoc ex)
49    {
50       originalExpression = ex;
51       Matcher JavaDoc m = PATTERN.matcher(ex);
52       if (!m.matches()) throw new IllegalStateException JavaDoc("MethodExpression is invalid: " + ex);
53       returnString = m.group(1);
54       returnString = returnString.replaceAll("\\.", "\\\\.");
55       returnString = returnString.replaceAll("\\*", ".*");
56       returnString = returnString.replaceAll("\\[", "\\\\[");
57       returnString = returnString.replaceAll("\\]", "\\\\]");
58       returnExpr = Pattern.compile(returnString);
59       methodName = m.group(2);
60       methodName = methodName.replaceAll("\\.", "\\\\.");
61       methodName = methodName.replaceAll("\\*", ".*");
62       methodName = methodName.replaceAll("\\[", "\\\\[");
63       methodName = methodName.replaceAll("\\]", "\\\\]");
64       methodNameExpr = Pattern.compile(methodName);
65       params = new ParameterExpression(m.group(3));
66    }
67
68
69    public boolean matches(Method method)
70    {
71       String JavaDoc returnType = ParameterExpression.simpleType(method.getReturnType());
72       Matcher JavaDoc ret = returnExpr.matcher(returnType);
73       if (!ret.matches()) return false;
74
75       Matcher JavaDoc cm = methodNameExpr.matcher(method.getName());
76       if (cm.matches() == false) return false;
77
78       return params.matches(method.getParameterTypes());
79    }
80
81    public boolean matches(CtMethod method) throws NotFoundException
82    {
83       String JavaDoc returnType = method.getReturnType().getName();
84       Matcher JavaDoc ret = returnExpr.matcher(returnType);
85       if (!ret.matches()) return false;
86
87       Matcher JavaDoc cm = methodNameExpr.matcher(method.getName());
88       if (cm.matches() == false) return false;
89
90       return params.matches(method.getParameterTypes());
91    }
92    
93    
94 }
95
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