Implement SearchEngine for the new driver.

pkg/analysis_server/lib/src/services/search/search_engine_internal2.dart

+// 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.
+
+import 'dart:async';
+
+import 'package:analysis_server/src/services/search/search_engine.dart';
+import 'package:analyzer/dart/element/element.dart';
+import 'package:analyzer/src/dart/analysis/driver.dart';
+import 'package:analyzer/src/dart/analysis/search.dart';
+import 'package:analyzer/src/generated/source.dart' show Source, SourceRange;
+
+/**
+ * A [SearchEngine] implementation.
+ */
+class SearchEngineImpl2 implements SearchEngine {
+  final Iterable<AnalysisDriver> _drivers;
+
+  SearchEngineImpl2(this._drivers);
+
+  @override
+  Future<List<SearchMatch>> searchAllSubtypes(ClassElement type) async {
+    // TODO(scheglov) implement
+    return [];
+  }
+
+  @override
+  Future<List<SearchMatch>> searchMemberDeclarations(String name) async {
+    // TODO(scheglov) implement
+    return [];
+  }
+
+  @override
+  Future<List<SearchMatch>> searchMemberReferences(String name) async {
+    // TODO(scheglov) implement
+    return [];
+  }
+
+  @override
+  Future<List<SearchMatch>> searchReferences(Element element) async {
+    List<SearchResult> allResults = [];
+    for (AnalysisDriver driver in _drivers) {
+      List<SearchResult> results = await driver.search.references(element);
+      allResults.addAll(results);
+    }
+    return allResults.map(_SearchMatch.forSearchResult).toList();
+  }
+
+  @override
+  Future<List<SearchMatch>> searchSubtypes(ClassElement type) async {
+    // TODO(scheglov) implement
+    return [];
+  }
+
+  @override
+  Future<List<SearchMatch>> searchTopLevelDeclarations(String pattern) async {
+    // TODO(scheglov) implement
+    return [];
+  }
+}
+
+class _SearchMatch implements SearchMatch {
+  @override
+  final String file;
+
+  @override
+  final Source librarySource;
+
+  @override
+  final Source unitSource;
+
+  @override
+  final LibraryElement libraryElement;
+
+  @override
+  final Element element;
+
+  @override
+  final bool isResolved;
+
+  @override
+  final bool isQualified;
+
+  @override
+  final MatchKind kind;
+
+  @override
+  final SourceRange sourceRange;
+
+  _SearchMatch(
+      this.file,
+      this.librarySource,
+      this.unitSource,
+      this.libraryElement,
+      this.element,
+      this.isResolved,
+      this.isQualified,
+      this.kind,
+      this.sourceRange);
+
+  @override
+  String toString() {
+    StringBuffer buffer = new StringBuffer();
+    buffer.write("SearchMatch(kind=");
+    buffer.write(kind);
+    buffer.write(", libraryUri=");
+    buffer.write(librarySource.uri);
+    buffer.write(", unitUri=");
+    buffer.write(unitSource.uri);
+    buffer.write(", range=");
+    buffer.write(sourceRange);
+    buffer.write(", isResolved=");
+    buffer.write(isResolved);
+    buffer.write(", isQualified=");
+    buffer.write(isQualified);
+    buffer.write(")");
+    return buffer.toString();
+  }
+
+  static _SearchMatch forSearchResult(SearchResult result) {
+    Element enclosingElement = result.enclosingElement;
+    return new _SearchMatch(
+        enclosingElement.source.fullName,
+        enclosingElement.librarySource,
+        enclosingElement.source,
+        enclosingElement.library,
+        enclosingElement,
+        result.isResolved,
+        result.isQualified,
+        toMatchKind(result.kind),
+        new SourceRange(result.offset, result.length));
+  }
+
+  static MatchKind toMatchKind(SearchResultKind kind) {
+    if (kind == SearchResultKind.READ) {
+      return MatchKind.READ;
+    }
+    if (kind == SearchResultKind.READ_WRITE) {
+      return MatchKind.READ_WRITE;
+    }
+    if (kind == SearchResultKind.WRITE) {
+      return MatchKind.WRITE;
+    }
+    if (kind == SearchResultKind.INVOCATION) {
+      return MatchKind.INVOCATION;
+    }
+    return MatchKind.REFERENCE;
+  }
+}