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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  }