Make more use of generated classes in analysis server.

pkg/analysis_server/lib/src/analysis_server.dart

 // Copyright (c) 2014, 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 analysis.server;
 
 import 'dart:async';
 import 'dart:collection';
 
 import 'package:analyzer/file_system/file_system.dart';
 import 'package:analysis_server/src/analysis_logger.dart';
 import 'package:analysis_server/src/channel.dart';
 import 'package:analysis_server/src/constants.dart';
 import 'package:analysis_server/src/context_manager.dart';
-import 'package:analysis_server/src/domain_analysis.dart';
 import 'package:analysis_server/src/operation/operation_analysis.dart';
 import 'package:analysis_server/src/operation/operation.dart';
 import 'package:analysis_server/src/operation/operation_queue.dart';
 import 'package:analysis_server/src/package_map_provider.dart';
 import 'package:analysis_server/src/protocol.dart';
 import 'package:analysis_server/src/protocol2.dart' show AnalysisService,
-    ServerService;
+    ServerService, AddContentOverlay, ChangeContentOverlay,
+    RemoveContentOverlay;
 import 'package:analyzer/source/package_map_resolver.dart';
 import 'package:analyzer/src/generated/ast.dart';
 import 'package:analyzer/src/generated/engine.dart';
 import 'package:analyzer/src/generated/source.dart';
 import 'package:analyzer/src/generated/sdk.dart';
 import 'package:analyzer/src/generated/source_io.dart';
 import 'package:analyzer/src/generated/java_engine.dart';
 import 'package:analysis_server/src/services/correction/change.dart';
 import 'package:analysis_server/src/services/index/index.dart';
 import 'package:analysis_server/src/services/search/search_engine.dart';
@@ skipping 438 matching lines @@
     } on UnimplementedError catch (e) {
       throw new RequestFailure(
                   new Response.unsupportedFeature(
                       requestId, e.message));
     }
   }
 
   /**
    * Implementation for `analysis.updateContent`.
    */
-  void updateContent(Map<String, ContentChange> changes) {
+  void updateContent(Map<String, dynamic> changes) {
     changes.forEach((file, change) {
       AnalysisContext analysisContext = getAnalysisContext(file);
       // TODO(paulberry): handle the case where a file is referred to by more
       // than one context (e.g package A depends on package B using a local
       // path, user has both packages open for editing in separate contexts,
       // and user modifies a file in package B).
       if (analysisContext != null) {
         Source source = getSource(file);
-        switch (change.type) {
-          case ADD:
-            analysisContext.setContents(source, change.content);
-            break;
-          case CHANGE:
-            // TODO(paulberry): an error should be generated if source is not
-            // currently in the content cache.
-            TimestampedData<String> oldContents = analysisContext.getContents(
-                source);
-            String newContents = Edit.applySequence(oldContents.data, change.changes);
-            // TODO(paulberry): to aid in incremental processing it would be
-            // better to use setChangedContents.
-            analysisContext.setContents(source, newContents);
-            break;
-          case REMOVE:
-            analysisContext.setContents(source, null);
-            break;
+        if (change is AddContentOverlay) {
+          analysisContext.setContents(source, change.content);
+        } else if (change is ChangeContentOverlay) {
+          // TODO(paulberry): an error should be generated if source is not
+          // currently in the content cache.
+          TimestampedData<String> oldContents = analysisContext.getContents(
+              source);
+          String newContents = applySequence(oldContents.data, change.edits);
+          // TODO(paulberry): to aid in incremental processing it would be
+          // better to use setChangedContents.
+          analysisContext.setContents(source, newContents);
+        } else if (change is RemoveContentOverlay) {
+          analysisContext.setContents(source, null);
+        } else {
+          // Protocol parsing should have ensured that we never get here.
+          throw new AnalysisException('Illegal change type');
         }
         schedulePerformAnalysisOperation(analysisContext);
       }
     });
   }
 
   /**
    * Implementation for `analysis.setSubscriptions`.
    */
   void setAnalysisSubscriptions(Map<AnalysisService, Set<String>> subscriptions) {
@@ skipping 292 matching lines @@
     Notification notification = new Notification(SERVER_ERROR);
     notification.setParameter(FATAL, true);
     notification.setParameter(MESSAGE, exceptionString);
     notification.setParameter(STACK_TRACE, stackTraceString);
     channel.sendNotification(notification);
   }
 }
 
 
 typedef void OptionUpdater(AnalysisOptionsImpl options);