software/no.uio.ifi.refaktor/src/no/uio/ifi/refaktor/analyze/VariableBindingFinder.java

   1 package no.uio.ifi.refaktor.analyze;
   2
   3 import java.util.regex.Matcher;
   4 import java.util.regex.Pattern;
   5
   6 import org.eclipse.jdt.core.dom.ASTNode;
   7 import org.eclipse.jdt.core.dom.ASTVisitor;
   8 import org.eclipse.jdt.core.dom.IBinding;
   9 import org.eclipse.jdt.core.dom.IVariableBinding;
  10 import org.eclipse.jdt.core.dom.SimpleName;
  11
  12 public class VariableBindingFinder extends ASTVisitor {
  13         private final String bindingKey;
  14         private final Pattern pattern;
  15         private final String keyGroupOne;
  16         private final String keyGroupTwo;
  17         private boolean bindingFound;
  18         private IVariableBinding variableBinding;
  19
  20         public VariableBindingFinder(String bindingKey) {
  21                 this.bindingKey = bindingKey;
  22                 bindingFound = false;
  23                 pattern = Pattern.compile("^([^$]+)\\$\\d+[$;](.+)$");
  24
  25                 Matcher bindingKeyMatcher = pattern.matcher(bindingKey);
  26
  27                 if (bindingKeyMatcher.matches()) {
  28                         keyGroupOne = bindingKeyMatcher.group(1);
  29                         keyGroupTwo = bindingKeyMatcher.group(2);
  30                 } else {
  31                         keyGroupOne = "";
  32                         keyGroupTwo = "";
  33                 }
  34         }
  35
  36         @Override
  37         public boolean visit(SimpleName node) {
  38                 IBinding binding = node.resolveBinding();
  39
  40                 if (!(binding instanceof IVariableBinding))
  41                         return false;
  42
  43                 if (perfectMatch(binding) || bindingPartiallyMatchesOriginalKey(binding)) {
  44                         variableBinding = (IVariableBinding) binding;
  45                         bindingFound = true;
  46                 }
  47
  48                 return false;
  49         }
  50
  51         private boolean perfectMatch(IBinding binding) {
  52                 return binding.getKey().equals(bindingKey);
  53         }
  54
  55         private boolean bindingPartiallyMatchesOriginalKey(IBinding binding) {
  56                 Matcher matcher = pattern.matcher(binding.getKey());
  57                 return matcher.matches() && keyGroupOne.equals(matcher.group(1)) && keyGroupTwo.equals(matcher.group(2));
  58         }
  59
  60         @Override
  61         public boolean preVisit2(ASTNode node) {
  62                 return !bindingFound;
  63         }
  64
  65         public IVariableBinding getVariableBinding() {
  66                 return variableBinding;
  67         }
  68 }