Error code validation for error filters.

pkg/analysis_server/lib/src/context_manager.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 context.directory.manager;
 
 import 'dart:async';
 import 'dart:collection';
 import 'dart:convert';
 import 'dart:core' hide Resource;
@@ skipping 483 matching lines @@
       }
     });
 
     // In case options files are removed, revert to default options.
     if (optionsRemoved) {
       info.context.analysisOptions = new AnalysisOptionsImpl();
       return;
     }
 
     // Analysis options are processed 'in-line'.
-    YamlMap analyzer = options['analyzer'];
+    YamlMap analyzer = options[AnalyzerOptions.analyzer];
     if (analyzer == null) {
       // No options for analyzer.
       return;
     }
 
     // Set strong mode (default is false).
-    bool strongMode = analyzer['strong-mode'] ?? false;
+    bool strongMode = analyzer[AnalyzerOptions.strong_mode] ?? false;
     AnalysisContext context = info.context;
     if (context.analysisOptions.strongMode != strongMode) {
       AnalysisOptionsImpl options =
           new AnalysisOptionsImpl.from(context.analysisOptions);
       options.strongMode = strongMode;
       context.analysisOptions = options;
     }
 
     // Set ignore patterns.
-    YamlList exclude = analyzer['exclude'];
+    YamlList exclude = analyzer[AnalyzerOptions.exclude];
     if (exclude != null) {
       setIgnorePatternsForContext(info, exclude);
     }
 
     // Set filters.
-    YamlNode filters = analyzer['errors'];
+    YamlNode filters = analyzer[AnalyzerOptions.errors];
     setFiltersForContext(info, filters);
   }
 
   @override
   void refresh(List<Resource> roots) {
     // Destroy old contexts
     List<ContextInfo> contextInfos = _rootInfo.descendants.toList();
     if (roots == null) {
       contextInfos.forEach(_destroyContext);
     } else {
@@ skipping 933 matching lines @@
           var path = resourceProvider.pathContext.fromUri(uri);
           packageMap[name] = <Folder>[resourceProvider.getFolder(path)];
         }
       });
       return <UriResolver>[new SdkExtUriResolver(packageMap)];
     } else {
       return const <UriResolver>[];
     }
   }
 }