Remove old index and search implementations.

pkg/analysis_server/lib/src/services/search/search_engine_internal.dart

Index: pkg/analysis_server/lib/src/services/search/search_engine_internal.dart
diff --git a/pkg/analysis_server/lib/src/services/search/search_engine_internal.dart b/pkg/analysis_server/lib/src/services/search/search_engine_internal.dart
index 77183395e398d045c9505f0662ca5cced84dfe69..c2b7b5abd1ea0696c1e87874037c311da2d995be 100644
--- a/pkg/analysis_server/lib/src/services/search/search_engine_internal.dart
+++ b/pkg/analysis_server/lib/src/services/search/search_engine_internal.dart
@@ -1,19 +1,22 @@
-// Copyright (c) 2014, the Dart project authors.  Please see the AUTHORS file
+// Copyright (c) 2016, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
-library services.src.search.search_engine;
+library services.src.search.search_engine2;

[Brian Wilkerson, 2016/03/14 18:57:32]

nit: I was going to suggest dropping the "2", but the whole library name is
wrong. It really ought to be
"analysis_server.src.services.search.search_engine_internal", or we should drop
the library directive altogether.

[scheglov, 2016/03/14 19:18:38]

Done.

 
 import 'dart:async';
 
-import 'package:analysis_server/src/provisional/index/index_core.dart';
 import 'package:analysis_server/src/services/correction/source_range.dart';
 import 'package:analysis_server/src/services/index/index.dart';
-import 'package:analysis_server/src/services/index/indexable_element.dart';
 import 'package:analysis_server/src/services/search/search_engine.dart';
+import 'package:analyzer/dart/ast/ast.dart';
+import 'package:analyzer/dart/ast/visitor.dart';
 import 'package:analyzer/dart/element/element.dart';
 import 'package:analyzer/src/dart/element/member.dart';
-import 'package:analyzer/src/generated/source.dart';
+import 'package:analyzer/src/generated/engine.dart' show AnalysisContext;
+import 'package:analyzer/src/generated/resolver.dart' show NamespaceBuilder;
+import 'package:analyzer/src/generated/source.dart' show Source, SourceRange;
+import 'package:analyzer/src/summary/idl.dart';
 
 /**
  * A [SearchEngine] implementation.
@@ -24,240 +27,384 @@ class SearchEngineImpl implements SearchEngine {
   SearchEngineImpl(this._index);
 
   @override
-  Future<List<SearchMatch>> searchAllSubtypes(ClassElement type) {
-    _Requestor requestor = new _Requestor(_index);
-    requestor.addElement(
-        type, IndexConstants.HAS_ANCESTOR, MatchKind.DECLARATION);
-    return requestor.merge();
+  Future<List<SearchMatch>> searchAllSubtypes(ClassElement type) async {
+    List<SearchMatch> matches = <SearchMatch>[];
+    await _addMatches(
+        matches, type, IndexRelationKind.IS_ANCESTOR_OF, MatchKind.DECLARATION);
+    return matches;
   }
 
   @override
-  Future<List<SearchMatch>> searchMemberDeclarations(String name) async {
-    List<SearchMatch> matches;
-    {
-      IndexableName indexableName = new IndexableName(name);
-      _Requestor requestor = new _Requestor(_index);
-      requestor.add(indexableName, IndexConstants.NAME_IS_DEFINED_BY,
-          MatchKind.DECLARATION);
-      matches = await requestor.merge();
-    }
-    return matches.where((match) {
-      return match.element.enclosingElement is ClassElement;
-    }).toList();
+  Future<List<SearchMatch>> searchMemberDeclarations(String pattern) {
+    return _searchDefinedNames(pattern, IndexNameKind.classMember);
   }
 
   @override
-  Future<List<SearchMatch>> searchMemberReferences(String name) {
-    IndexableName indexableName = new IndexableName(name);
-    _Requestor requestor = new _Requestor(_index);
-    requestor.add(
-        indexableName, IndexConstants.IS_INVOKED_BY, MatchKind.INVOCATION);
-    requestor.add(indexableName, IndexConstants.IS_READ_BY, MatchKind.READ);
-    requestor.add(
-        indexableName, IndexConstants.IS_READ_WRITTEN_BY, MatchKind.READ_WRITE);
-    requestor.add(indexableName, IndexConstants.IS_WRITTEN_BY, MatchKind.WRITE);
-    return requestor.merge();
+  Future<List<SearchMatch>> searchMemberReferences(String name) async {
+    List<Location> locations = await _index.getUnresolvedMemberReferences(name);
+    return locations.map((location) {
+      return _newMatchForLocation(location, null);
+    }).toList();
   }
 
   @override
   Future<List<SearchMatch>> searchReferences(Element element) {
-    if (element.kind == ElementKind.CLASS) {
-      return _searchReferences(element);
-    } else if (element.kind == ElementKind.COMPILATION_UNIT) {
-      return _searchReferences(element);
-    } else if (element.kind == ElementKind.CONSTRUCTOR) {
-      return _searchReferences_Constructor(element as ConstructorElement);
-    } else if (element.kind == ElementKind.FIELD ||
-        element.kind == ElementKind.TOP_LEVEL_VARIABLE) {
-      return _searchReferences_Field(element as PropertyInducingElement);
-    } else if (element.kind == ElementKind.FUNCTION) {
-      return _searchReferences_Function(element as FunctionElement);
-    } else if (element.kind == ElementKind.GETTER ||
-        element.kind == ElementKind.SETTER) {
-      return _searchReferences(element);
-    } else if (element.kind == ElementKind.IMPORT) {
-      return _searchReferences(element);
-    } else if (element.kind == ElementKind.LABEL) {
-      return _searchReferences(element);
-    } else if (element.kind == ElementKind.LIBRARY) {
-      return _searchReferences(element);
-    } else if (element.kind == ElementKind.LOCAL_VARIABLE) {
-      return _searchReferences_LocalVariable(element as LocalVariableElement);
-    } else if (element.kind == ElementKind.METHOD) {
-      return _searchReferences_Method(element as MethodElement);
-    } else if (element.kind == ElementKind.PARAMETER) {
-      return _searchReferences_Parameter(element as ParameterElement);
-    } else if (element.kind == ElementKind.PREFIX) {
-      return _searchReferences(element);
-    } else if (element.kind == ElementKind.FUNCTION_TYPE_ALIAS) {
-      return _searchReferences(element);
-    } else if (element.kind == ElementKind.TYPE_PARAMETER) {
+    ElementKind kind = element.kind;
+    if (kind == ElementKind.CLASS ||
+        kind == ElementKind.COMPILATION_UNIT ||
+        kind == ElementKind.CONSTRUCTOR ||
+        kind == ElementKind.FUNCTION_TYPE_ALIAS ||
+        kind == ElementKind.SETTER) {
       return _searchReferences(element);
+    } else if (kind == ElementKind.GETTER) {
+      return _searchReferences_Getter(element);
+    } else if (kind == ElementKind.FIELD ||
+        kind == ElementKind.TOP_LEVEL_VARIABLE) {
+      return _searchReferences_Field(element);
+    } else if (kind == ElementKind.FUNCTION || kind == ElementKind.METHOD) {
+      if (element.enclosingElement is ExecutableElement) {
+        return _searchReferences_Local(element, (n) => n is Block);
+      }
+      return _searchReferences_Function(element);
+    } else if (kind == ElementKind.IMPORT) {
+      return _searchReferences_Import(element);
+    } else if (kind == ElementKind.LABEL ||
+        kind == ElementKind.LOCAL_VARIABLE) {
+      return _searchReferences_Local(element, (n) => n is Block);
+    } else if (kind == ElementKind.LIBRARY) {
+      return _searchReferences_Library(element);
+    } else if (kind == ElementKind.PARAMETER) {
+      return _searchReferences_Parameter(element);
+    } else if (kind == ElementKind.PREFIX) {
+      return _searchReferences_Prefix(element);
+    } else if (kind == ElementKind.TYPE_PARAMETER) {
+      return _searchReferences_Local(element, (n) => n is ClassDeclaration);
     }
     return new Future.value(<SearchMatch>[]);
   }
 
   @override
-  Future<List<SearchMatch>> searchSubtypes(ClassElement type) {
-    _Requestor requestor = new _Requestor(_index);
-    requestor.addElement(
-        type, IndexConstants.IS_EXTENDED_BY, MatchKind.REFERENCE);
-    requestor.addElement(
-        type, IndexConstants.IS_MIXED_IN_BY, MatchKind.REFERENCE);
-    requestor.addElement(
-        type, IndexConstants.IS_IMPLEMENTED_BY, MatchKind.REFERENCE);
-    return requestor.merge();
+  Future<List<SearchMatch>> searchSubtypes(ClassElement type) async {
+    List<SearchMatch> matches = <SearchMatch>[];
+    await _addMatches(
+        matches, type, IndexRelationKind.IS_EXTENDED_BY, MatchKind.REFERENCE);
+    await _addMatches(
+        matches, type, IndexRelationKind.IS_MIXED_IN_BY, MatchKind.REFERENCE);
+    await _addMatches(matches, type, IndexRelationKind.IS_IMPLEMENTED_BY,
+        MatchKind.REFERENCE);
+    return matches;
   }
 
   @override
   Future<List<SearchMatch>> searchTopLevelDeclarations(String pattern) {
-    RegExp regExp = new RegExp(pattern);
-    List<Element> elements =
-        _index.getTopLevelDeclarations((String name) => regExp.hasMatch(name));
-    List<SearchMatch> matches = <SearchMatch>[];
-    for (Element element in elements) {
-      matches.add(new SearchMatch(
-          element.context,
-          element.library.source.uri.toString(),
-          element.source.uri.toString(),
-          MatchKind.DECLARATION,
-          rangeElementName(element),
-          true,
-          false));
+    return _searchDefinedNames(pattern, IndexNameKind.topLevel);
+  }
+
+  _addMatches(List<SearchMatch> matches, Element element,
+      IndexRelationKind relationKind, MatchKind kind) async {
+    List<Location> locations = await _index.getRelations(element, relationKind);
+    for (Location location in locations) {
+      SearchMatch match = _newMatchForLocation(location, kind);
+      matches.add(match);
     }
-    return new Future.value(matches);
   }
 
-  Future<List<SearchMatch>> _searchReferences(Element element) {
-    _Requestor requestor = new _Requestor(_index);
-    requestor.addElement(
-        element, IndexConstants.IS_REFERENCED_BY, MatchKind.REFERENCE);
-    return requestor.merge();
+  SearchMatch _newMatchForLocation(Location location, MatchKind kind) {
+    if (kind == null) {
+      IndexRelationKind relationKind = location.kind;
+      if (relationKind == IndexRelationKind.IS_INVOKED_BY) {
+        kind = MatchKind.INVOCATION;
+      } else if (relationKind == IndexRelationKind.IS_REFERENCED_BY) {
+        kind = MatchKind.REFERENCE;
+      } else if (relationKind == IndexRelationKind.IS_READ_BY) {
+        kind = MatchKind.READ;
+      } else if (relationKind == IndexRelationKind.IS_READ_WRITTEN_BY) {
+        kind = MatchKind.READ_WRITE;
+      } else if (relationKind == IndexRelationKind.IS_WRITTEN_BY) {
+        kind = MatchKind.WRITE;
+      } else {
+        throw new ArgumentError('Unsupported relation kind $relationKind');
+      }
+    }
+    return new SearchMatch(
+        location.context,
+        location.libraryUri,
+        location.unitUri,
+        kind,
+        new SourceRange(location.offset, location.length),
+        location.isResolved,
+        location.isQualified);
   }
 
-  Future<List<SearchMatch>> _searchReferences_Constructor(
-      ConstructorElement constructor) {
-    _Requestor requestor = new _Requestor(_index);
-    requestor.addElement(
-        constructor, IndexConstants.IS_REFERENCED_BY, MatchKind.REFERENCE);
-    return requestor.merge();
+  Future<List<SearchMatch>> _searchDefinedNames(
+      String pattern, IndexNameKind nameKind) async {
+    RegExp regExp = new RegExp(pattern);
+    List<Location> locations = await _index.getDefinedNames(regExp, nameKind);
+    return locations.map((location) {
+      return _newMatchForLocation(location, MatchKind.DECLARATION);
+    }).toList();
+  }
+
+  Future<List<SearchMatch>> _searchReferences(Element element) async {
+    List<SearchMatch> matches = <SearchMatch>[];
+    await _addMatches(matches, element, IndexRelationKind.IS_REFERENCED_BY,
+        MatchKind.REFERENCE);
+    return matches;
   }
 
   Future<List<SearchMatch>> _searchReferences_Field(
-      PropertyInducingElement field) {
+      PropertyInducingElement field) async {
+    List<SearchMatch> matches = <SearchMatch>[];
     PropertyAccessorElement getter = field.getter;
     PropertyAccessorElement setter = field.setter;
-    _Requestor requestor = new _Requestor(_index);
     // field itself
-    requestor.addElement(
-        field, IndexConstants.IS_REFERENCED_BY, MatchKind.REFERENCE);
-    requestor.addElement(field, IndexConstants.IS_WRITTEN_BY, MatchKind.WRITE);
+    if (!field.isSynthetic) {
+      await _addMatches(
+          matches, field, IndexRelationKind.IS_WRITTEN_BY, MatchKind.WRITE);
+      await _addMatches(matches, field, IndexRelationKind.IS_REFERENCED_BY,
+          MatchKind.REFERENCE);
+    }
     // getter
     if (getter != null) {
-      requestor.addElement(
-          getter, IndexConstants.IS_REFERENCED_BY, MatchKind.READ);
-      requestor.addElement(
-          getter, IndexConstants.IS_INVOKED_BY, MatchKind.INVOCATION);
+      await _addMatches(
+          matches, getter, IndexRelationKind.IS_REFERENCED_BY, MatchKind.READ);
+      await _addMatches(matches, getter, IndexRelationKind.IS_INVOKED_BY,
+          MatchKind.INVOCATION);
     }
     // setter
     if (setter != null) {
-      requestor.addElement(
-          setter, IndexConstants.IS_REFERENCED_BY, MatchKind.WRITE);
+      await _addMatches(
+          matches, setter, IndexRelationKind.IS_REFERENCED_BY, MatchKind.WRITE);
     }
     // done
-    return requestor.merge();
+    return matches;
   }
 
-  Future<List<SearchMatch>> _searchReferences_Function(
-      FunctionElement function) {
-    _Requestor requestor = new _Requestor(_index);
-    requestor.addElement(
-        function, IndexConstants.IS_REFERENCED_BY, MatchKind.REFERENCE);
-    requestor.addElement(
-        function, IndexConstants.IS_INVOKED_BY, MatchKind.INVOCATION);
-    return requestor.merge();
+  Future<List<SearchMatch>> _searchReferences_Function(Element element) async {
+    if (element is Member) {
+      element = (element as Member).baseElement;
+    }
+    List<SearchMatch> matches = <SearchMatch>[];
+    await _addMatches(matches, element, IndexRelationKind.IS_REFERENCED_BY,
+        MatchKind.REFERENCE);
+    await _addMatches(matches, element, IndexRelationKind.IS_INVOKED_BY,
+        MatchKind.INVOCATION);
+    return matches;
   }
 
-  Future<List<SearchMatch>> _searchReferences_LocalVariable(
-      LocalVariableElement variable) {
-    _Requestor requestor = new _Requestor(_index);
-    requestor.addElement(variable, IndexConstants.IS_READ_BY, MatchKind.READ);
-    requestor.addElement(
-        variable, IndexConstants.IS_READ_WRITTEN_BY, MatchKind.READ_WRITE);
-    requestor.addElement(
-        variable, IndexConstants.IS_WRITTEN_BY, MatchKind.WRITE);
-    requestor.addElement(
-        variable, IndexConstants.IS_INVOKED_BY, MatchKind.INVOCATION);
-    return requestor.merge();
+  Future<List<SearchMatch>> _searchReferences_Getter(
+      PropertyAccessorElement getter) async {
+    List<SearchMatch> matches = <SearchMatch>[];
+    await _addMatches(matches, getter, IndexRelationKind.IS_REFERENCED_BY,
+        MatchKind.REFERENCE);
+    await _addMatches(
+        matches, getter, IndexRelationKind.IS_INVOKED_BY, MatchKind.INVOCATION);
+    return matches;
   }
 
-  Future<List<SearchMatch>> _searchReferences_Method(MethodElement method) {
-    _Requestor requestor = new _Requestor(_index);
-    if (method is MethodMember) {
-      method = (method as MethodMember).baseElement;
+  Future<List<SearchMatch>> _searchReferences_Import(
+      ImportElement element) async {
+    List<SearchMatch> matches = <SearchMatch>[];
+    LibraryElement libraryElement = element.library;
+    Source librarySource = libraryElement.source;
+    AnalysisContext context = libraryElement.context;
+    for (CompilationUnitElement unitElement in libraryElement.units) {
+      Source unitSource = unitElement.source;
+      CompilationUnit unit =
+          context.resolveCompilationUnit2(unitSource, librarySource);
+      _ImportElementReferencesVisitor visitor =
+          new _ImportElementReferencesVisitor(
+              element, unitSource.uri.toString());
+      unit.accept(visitor);
+      matches.addAll(visitor.matches);
     }
-    requestor.addElement(
-        method, IndexConstants.IS_REFERENCED_BY, MatchKind.REFERENCE);
-    requestor.addElement(
-        method, IndexConstants.IS_INVOKED_BY, MatchKind.INVOCATION);
-    return requestor.merge();
+    return matches;
+  }
+
+  Future<List<SearchMatch>> _searchReferences_Library(Element element) async {
+    List<SearchMatch> matches = <SearchMatch>[];
+    LibraryElement libraryElement = element.library;
+    Source librarySource = libraryElement.source;
+    AnalysisContext context = libraryElement.context;
+    for (CompilationUnitElement unitElement in libraryElement.parts) {
+      Source unitSource = unitElement.source;
+      CompilationUnit unit =
+          context.resolveCompilationUnit2(unitSource, librarySource);
+      for (Directive directive in unit.directives) {
+        if (directive is PartOfDirective &&
+            directive.element == libraryElement) {
+          matches.add(new SearchMatch(
+              context,
+              librarySource.uri.toString(),
+              unitSource.uri.toString(),
+              MatchKind.REFERENCE,
+              rangeNode(directive.libraryName),
+              true,
+              false));
+        }
+      }
+    }
+    return matches;
+  }
+
+  Future<List<SearchMatch>> _searchReferences_Local(
+      Element element, bool isRootNode(AstNode n)) async {
+    _LocalReferencesVisitor visitor = new _LocalReferencesVisitor(element);
+    AstNode node = element.computeNode();
+    AstNode enclosingNode = node?.getAncestor(isRootNode);
+    enclosingNode?.accept(visitor);
+    return visitor.matches;
   }
 
   Future<List<SearchMatch>> _searchReferences_Parameter(
-      ParameterElement parameter) {
-    _Requestor requestor = new _Requestor(_index);
-    requestor.addElement(parameter, IndexConstants.IS_READ_BY, MatchKind.READ);
-    requestor.addElement(
-        parameter, IndexConstants.IS_READ_WRITTEN_BY, MatchKind.READ_WRITE);
-    requestor.addElement(
-        parameter, IndexConstants.IS_WRITTEN_BY, MatchKind.WRITE);
-    requestor.addElement(
-        parameter, IndexConstants.IS_REFERENCED_BY, MatchKind.REFERENCE);
-    requestor.addElement(
-        parameter, IndexConstants.IS_INVOKED_BY, MatchKind.INVOCATION);
-    return requestor.merge();
+      ParameterElement parameter) async {
+    List<SearchMatch> matches = <SearchMatch>[];
+    matches.addAll(await _searchReferences(parameter));
+    matches.addAll(await _searchReferences_Local(
+        parameter, (n) => n is MethodDeclaration || n is FunctionExpression));
+    return matches;
+  }
+
+  Future<List<SearchMatch>> _searchReferences_Prefix(
+      PrefixElement element) async {
+    List<SearchMatch> matches = <SearchMatch>[];
+    LibraryElement libraryElement = element.library;
+    Source librarySource = libraryElement.source;
+    AnalysisContext context = libraryElement.context;
+    for (CompilationUnitElement unitElement in libraryElement.units) {
+      Source unitSource = unitElement.source;
+      CompilationUnit unit =
+          context.resolveCompilationUnit2(unitSource, librarySource);
+      _LocalReferencesVisitor visitor =
+          new _LocalReferencesVisitor(element, unitSource.uri.toString());
+      unit.accept(visitor);
+      matches.addAll(visitor.matches);
+    }
+    return matches;
   }
 }
 
-class _Requestor {
-  final List<Future<List<SearchMatch>>> futures = <Future<List<SearchMatch>>>[];
-  final Index index;
-
-  _Requestor(this.index);
-
-  void add(IndexableObject indexable, RelationshipImpl relationship,
-      MatchKind kind) {
-    Future relationsFuture = index.getRelationships(indexable, relationship);
-    Future matchesFuture = relationsFuture.then((List<LocationImpl> locations) {
-      List<SearchMatch> matches = <SearchMatch>[];
-      for (LocationImpl location in locations) {
-        IndexableObject indexable = location.indexable;
-        if (indexable is IndexableElement) {
-          Element element = indexable.element;
-          matches.add(new SearchMatch(
-              element.context,
-              element.library.source.uri.toString(),
-              element.source.uri.toString(),
-              kind,
-              new SourceRange(location.offset, location.length),
-              location.isResolved,
-              location.isQualified));
+/**
+ * Visitor that adds [SearchMatch]es for [importElement], both with an explicit
+ * prefix or an implicit one.
+ */
+class _ImportElementReferencesVisitor extends RecursiveAstVisitor {
+  final List<SearchMatch> matches = <SearchMatch>[];
+
+  final ImportElement importElement;
+  final AnalysisContext context;
+  final String libraryUri;
+  final String unitUri;
+  Set<Element> importedElements;
+
+  _ImportElementReferencesVisitor(ImportElement element, this.unitUri)
+      : importElement = element,
+        context = element.context,
+        libraryUri = element.library.source.uri.toString() {
+    importedElements = new NamespaceBuilder()
+        .createImportNamespaceForDirective(element)
+        .definedNames
+        .values
+        .toSet();
+  }
+
+  @override
+  visitExportDirective(ExportDirective node) {}
+
+  @override
+  visitImportDirective(ImportDirective node) {}
+
+  @override
+  visitSimpleIdentifier(SimpleIdentifier node) {
+    if (node.inDeclarationContext()) {
+      return;
+    }
+    if (importElement.prefix != null) {
+      if (node.staticElement == importElement.prefix) {
+        AstNode parent = node.parent;
+        if (parent is PrefixedIdentifier && parent.prefix == node) {
+          if (importedElements.contains(parent.staticElement)) {
+            _addMatchForPrefix(node, parent.identifier);
+          }
         }
+        if (parent is MethodInvocation && parent.target == node) {
+          if (importedElements.contains(parent.methodName.staticElement)) {
+            _addMatchForPrefix(node, parent.methodName);
+          }
+        }
+      }
+    } else {
+      if (importedElements.contains(node.staticElement)) {
+        SourceRange range = rangeStartLength(node, 0);
+        _addMatchForRange(range);
       }
-      return matches;
-    });
-    futures.add(matchesFuture);
+    }
+  }
+
+  void _addMatchForPrefix(SimpleIdentifier prefixNode, AstNode nextNode) {
+    SourceRange range = rangeStartStart(prefixNode, nextNode);
+    _addMatchForRange(range);
   }
 
-  void addElement(
-      Element element, RelationshipImpl relationship, MatchKind kind) {
-    IndexableElement indexable = new IndexableElement(element);
-    add(indexable, relationship, kind);
+  void _addMatchForRange(SourceRange range) {
+    matches.add(new SearchMatch(
+        context, libraryUri, unitUri, MatchKind.REFERENCE, range, true, false));
+  }
+}
+
+/**
+ * Visitor that adds [SearchMatch]es for local elements of a block, method,
+ * class or a library - labels, local functions, local variables and parameters,
+ * type parameters, import prefixes.
+ */
+class _LocalReferencesVisitor extends RecursiveAstVisitor {
+  final List<SearchMatch> matches = <SearchMatch>[];
+
+  final Element element;
+  final AnalysisContext context;
+  final String libraryUri;
+  final String unitUri;
+
+  _LocalReferencesVisitor(Element element, [String unitUri])
+      : element = element,
+        context = element.context,
+        libraryUri = element.library.source.uri.toString(),
+        unitUri = unitUri ?? element.source.uri.toString();
+
+  @override
+  visitSimpleIdentifier(SimpleIdentifier node) {
+    if (node.inDeclarationContext()) {
+      return;
+    }
+    if (node.bestElement == element) {
+      AstNode parent = node.parent;
+      MatchKind kind = MatchKind.REFERENCE;
+      if (element is FunctionElement) {
+        if (parent is MethodInvocation && parent.methodName == node) {
+          kind = MatchKind.INVOCATION;
+        }
+      } else if (element is VariableElement) {
+        bool isGet = node.inGetterContext();
+        bool isSet = node.inSetterContext();
+        if (isGet && isSet) {
+          kind = MatchKind.READ_WRITE;
+        } else if (isGet) {
+          if (parent is MethodInvocation && parent.methodName == node) {
+            kind = MatchKind.INVOCATION;
+          } else {
+            kind = MatchKind.READ;
+          }
+        } else if (isSet) {
+          kind = MatchKind.WRITE;
+        }
+      }
+      _addMatch(node, kind);
+    }
   }
 
-  Future<List<SearchMatch>> merge() {
-    return Future.wait(futures).then((List<List<SearchMatch>> matchesList) {
-      return matchesList.expand((matches) => matches).toList();
-    });
+  void _addMatch(AstNode node, MatchKind kind) {
+    bool isQualified = node is SimpleIdentifier && node.isQualified;
+    matches.add(new SearchMatch(context, libraryUri, unitUri, kind,
+        rangeNode(node), true, isQualified));
   }
 }