Add OCCURRENCES_CONTRIBUTOR_EXTENSION_POINT_ID.

pkg/analysis_server/lib/src/domains/analysis/occurrences.dart

Index: pkg/analysis_server/lib/src/domains/analysis/occurrences.dart
diff --git a/pkg/analysis_server/lib/src/domains/analysis/occurrences.dart b/pkg/analysis_server/lib/src/domains/analysis/occurrences.dart
new file mode 100644
index 0000000000000000000000000000000000000000..b8fd2a0dd98fb1597b8d36cb6a84fb90f833408e
--- /dev/null
+++ b/pkg/analysis_server/lib/src/domains/analysis/occurrences.dart
@@ -0,0 +1,45 @@
+// Copyright (c) 2014, the Dart project authors.  Please see the AUTHORS file

[Brian Wilkerson, 2015/09/11 20:26:24]

2015

+// 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 domains.analysis.occurrences;
+
+import 'package:analysis_server/analysis/occurrences_core.dart';
+import 'package:analysis_server/src/analysis_server.dart';
+import 'package:analysis_server/src/protocol_server.dart' as protocol;
+import 'package:analyzer/src/generated/engine.dart'
+    show AnalysisContext, AnalysisEngine;
+import 'package:analyzer/src/generated/java_engine.dart' show CaughtException;
+import 'package:analyzer/src/generated/source.dart' show Source;
+
+/**
+ * Compute all known occurrences for the given [source].
+ */
+OccurrencesCollectorImpl computeOccurrences(
+    AnalysisServer server, AnalysisContext context, Source source) {
+  OccurrencesCollectorImpl collector = new OccurrencesCollectorImpl();
+  List<OccurrencesContributor> contributors =
+      server.serverPlugin.occurrencesContributors;
+  for (OccurrencesContributor contributor in contributors) {
+    try {
+      contributor.computeOccurrences(collector, context, source);
+    } catch (exception, stackTrace) {
+      AnalysisEngine.instance.logger.logError(
+          'Exception from occurrences contributor: ${contributor.runtimeType}',
+          new CaughtException(exception, stackTrace));
+    }
+  }
+  return collector;
+}
+
+/**
+ * A concrete implementation of [OccurrencesCollector].
+ */
+class OccurrencesCollectorImpl implements OccurrencesCollector {
+  final List<protocol.Occurrences> allOccurrences = <protocol.Occurrences>[];
+
+  @override
+  void addOccurrences(protocol.Occurrences occurrences) {
+    allOccurrences.add(occurrences);
+  }
+}