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Java > Open Source Codes > org > jboss > aop > pointcut > DeclareTypeMatcher


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.pointcut;
23
24 import javassist.CtClass;
25
26 import org.jboss.aop.Advisor;
27 import org.jboss.aop.pointcut.ast.ASTConstructor;
28 import org.jboss.aop.pointcut.ast.ASTField;
29 import org.jboss.aop.pointcut.ast.ASTHas;
30 import org.jboss.aop.pointcut.ast.ASTHasField;
31 import org.jboss.aop.pointcut.ast.ASTMethod;
32 import org.jboss.aop.pointcut.ast.Node;
33
34 /**
35  * Same as TypeMatcher apart from that hasfield() and has() only check for existence
36  * of field/method/constructor on the class itself, and do not check the superclass.
37  * Used by DeclareDef to enforce implementation of methods etc.
38  *
39  * @author <a HREF="mailto:kabir.khan@jboss.org">Kabir Khan</a>
40  * @version $Revision: 37406 $
41  */
42 public class DeclareTypeMatcher extends TypeMatcher
43 {
44    public DeclareTypeMatcher(Advisor advisor, Class JavaDoc clazz)
45    {
46       super(advisor, clazz);
47    }
48
49    public DeclareTypeMatcher(Advisor advisor, CtClass ctClass)
50    {
51       super(advisor, ctClass);
52    }
53    
54    public Object JavaDoc visit(ASTHas node, Object JavaDoc data)
55    {
56       Node n = node.jjtGetChild(0);
57       if (n instanceof ASTMethod)
58       {
59          boolean checkSuper = false;
60          if (clazz != null) return new Boolean JavaDoc(Util.has(clazz, (ASTMethod) n, advisor, checkSuper));
61          if (ctClass != null) return new Boolean JavaDoc(Util.has(ctClass, (ASTMethod) n, advisor, checkSuper));
62       }
63       else
64       {
65          //Constructors only get checked on the class itself
66 if (clazz != null) return new Boolean JavaDoc(Util.has(clazz, (ASTConstructor) n, advisor));
67          if (ctClass != null) return new Boolean JavaDoc(Util.has(ctClass, (ASTConstructor) n, advisor));
68       }
69       return Boolean.FALSE;
70    }
71
72    public Object JavaDoc visit(ASTHasField node, Object JavaDoc data)
73    {
74       boolean checkSuper = false;
75       ASTField f = (ASTField) node.jjtGetChild(0);
76       if (clazz != null)
77          return new Boolean JavaDoc(Util.has(clazz, f, advisor, checkSuper));
78       else
79          return new Boolean JavaDoc(Util.has(ctClass, f, advisor, checkSuper));
80    }
81
82 }
83
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