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1   /***
2    * BSD-style license; for more info see http://pmd.sourceforge.net/license.html
3    */
4   package net.sourceforge.pmd.symboltable;
5   
6   import net.sourceforge.pmd.ast.ASTArguments;
7   import net.sourceforge.pmd.ast.ASTName;
8   import net.sourceforge.pmd.ast.ASTPrimaryExpression;
9   import net.sourceforge.pmd.ast.ASTPrimaryPrefix;
10  import net.sourceforge.pmd.ast.ASTPrimarySuffix;
11  import net.sourceforge.pmd.ast.SimpleNode;
12  
13  import java.util.Iterator;
14  import java.util.LinkedList;
15  import java.util.List;
16  import java.util.StringTokenizer;
17  
18  public class NameFinder {
19  
20      private LinkedList names = new LinkedList();
21  
22      public NameFinder(ASTPrimaryExpression node) {
23          ASTPrimaryPrefix prefix = (ASTPrimaryPrefix) node.jjtGetChild(0);
24          if (prefix.usesSuperModifier()) {
25              add(new NameOccurrence(prefix, "super"));
26          } else if (prefix.usesThisModifier()) {
27              add(new NameOccurrence(prefix, "this"));
28          }
29          for (int i = 0; i < node.jjtGetNumChildren(); i++) {
30              checkForNameChild((SimpleNode) node.jjtGetChild(i));
31          }
32      }
33  
34      public List getNames() {
35          return names;
36      }
37  
38      private void checkForNameChild(SimpleNode node) {
39          if (node.getImage() != null) {
40              add(new NameOccurrence(node, node.getImage()));
41          }
42          if (node.jjtGetNumChildren() > 0 && node.jjtGetChild(0) instanceof ASTName) {
43              ASTName grandchild = (ASTName) node.jjtGetChild(0);
44              for (StringTokenizer st = new StringTokenizer(grandchild.getImage(), "."); st.hasMoreTokens();) {
45                  add(new NameOccurrence(grandchild, st.nextToken()));
46              }
47          }
48          if (node instanceof ASTPrimarySuffix && ((ASTPrimarySuffix) node).isArguments()) {
49              NameOccurrence occurrence = (NameOccurrence) names.getLast();
50              occurrence.setIsMethodOrConstructorInvocation();
51              ASTArguments args = (ASTArguments) ((ASTPrimarySuffix) node).jjtGetChild(0);
52              occurrence.setArgumentCount(args.getArgumentCount());
53  
54          }
55      }
56  
57      private void add(NameOccurrence name) {
58          names.add(name);
59          if (names.size() > 1) {
60              NameOccurrence qualifiedName = (NameOccurrence) names.get(names.size() - 2);
61              qualifiedName.setNameWhichThisQualifies(name);
62          }
63      }
64  
65  
66      public String toString() {
67          StringBuffer result = new StringBuffer();
68          for (Iterator i = names.iterator(); i.hasNext();) {
69              NameOccurrence occ = (NameOccurrence) i.next();
70              result.append(occ.getImage());
71          }
72          return result.toString();
73      }
74  }