Extract constants into separate libarary.

pkg/analysis_server/lib/src/domain_analysis.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 domain.analysis;
 
 import 'package:analysis_server/src/analysis_server.dart';
+import 'package:analysis_server/src/constants.dart';
 import 'package:analysis_server/src/protocol.dart';
 
 /**
  * Instances of the class [AnalysisDomainHandler] implement a [RequestHandler]
  * that handles requests in the `analysis` domain.
  */
 class AnalysisDomainHandler implements RequestHandler {
   /**
-   * The name of the `analysis.getFixes` request.
-   */
-  static const String GET_FIXES_METHOD = 'analysis.getFixes';
-
-  /**
-   * The name of the `analysis.getMinorRefactorings` request.
-   */
-  static const String GET_MINOR_REFACTORINGS_METHOD = 'analysis.getMinorRefactorings';
-
-  /**
-   * The name of the `analysis.setAnalysisRoots` request.
-   */
-  static const String SET_ANALYSIS_ROOTS_METHOD = 'analysis.setAnalysisRoots';
-
-  /**
-   * The name of the `analysis.setPriorityFiles` request.
-   */
-  static const String SET_PRIORITY_FILES_METHOD = 'analysis.setPriorityFiles';
-
-  /**
-   * The name of the `analysis.setSubscriptions` request.
-   */
-  static const String SET_SUBSCRIPTIONS_METHOD = 'analysis.setSubscriptions';
-
-  /**
-   * The name of the `analysis.updateContent` request.
-   */
-  static const String UPDATE_CONTENT_METHOD = 'analysis.updateContent';
-
-  /**
-   * The name of the `analysis.updateOptions` request.
-   */
-  static const String UPDATE_OPTIONS_METHOD = 'analysis.updateOptions';
-
-  /**
-   * The name of the `analysis.updateSdks` request.
-   */
-  static const String UPDATE_SDKS_METHOD = 'analysis.updateSdks';
-
-  /**
-   * The name of the `analysis.errors` notification.
-   */
-  static const String ERRORS_NOTIFICATION = 'analysis.errors';
-
-  /**
-   * The name of the `analysis.highlights` notification.
-   */
-  static const String HIGHLIGHTS_NOTIFICATION = 'analysis.highlights';
-
-  /**
-   * The name of the `analysis.navigation` notification.
-   */
-  static const String NAVIGATION_NOTIFICATION = 'analysis.navigation';
-
-  /**
-   * The name of the `analysis.outline` notification.
-   */
-  static const String OUTLINE_NOTIFICATION = 'analysis.outline';
-
-  /**
-   * The name of the `aadded` parameter.
-   */
-  static const String ADDED_PARAM = 'added';
-
-  /**
-   * The name of the `content` parameter.
-   */
-  static const String CONTENT_PARAM = 'content';
-
-  /**
-   * The name of the `default` parameter.
-   */
-  static const String DEFAULT_PARAM = 'default';
-
-  /**
-   * The name of the `errors` parameter.
-   */
-  static const String ERRORS_PARAM = 'errors';
-
-  /**
-   * The name of the `excluded` parameter.
-   */
-  static const String EXCLUDED_PARAM = 'excluded';
-
-  /**
-   * The name of the `file` parameter.
-   */
-  static const String FILE_PARAM = 'file';
-
-  /**
-   * The name of the `files` parameter.
-   */
-  static const String FILES_PARAM = 'files';
-
-  /**
-   * The name of the `fixes` parameter.
-   */
-  static const String FIXES_PARAM = 'fixes';
-
-  /**
-   * The name of the `included` parameter.
-   */
-  static const String INCLUDED_PARAM = 'included';
-
-  /**
-   * The name of the `length` parameter.
-   */
-  static const String LENGTH_PARAM = 'length';
-
-  /**
-   * The name of the `newLength` parameter.
-   */
-  static const String NEW_LENGTH_PARAM = 'newLength';
-
-  /**
-   * The name of the `offset` parameter.
-   */
-  static const String OFFSET_PARAM = 'offset';
-
-  /**
-   * The name of the `oldLength` parameter.
-   */
-  static const String OLD_LENGTH_PARAM = 'oldLength';
-
-  /**
-   * The name of the `options` parameter.
-   */
-  static const String OPTIONS_PARAM = 'options';
-
-  /**
-   * The name of the `outline` parameter.
-   */
-  static const String OUTLINE_PARAM = 'outline';
-
-  /**
-   * The name of the `refactorings` parameter.
-   */
-  static const String REFACTORINGS_PARAM = 'refactorings';
-
-  /**
-   * The name of the `regions` parameter.
-   */
-  static const String REGIONS_PARAM = 'regions';
-
-  /**
-   * The name of the `removed` parameter.
-   */
-  static const String REMOVED_PARAM = 'removed';
-
-  /**
-   * The name of the `subscriptions` parameter.
-   */
-  static const String SUBSCRIPTIONS_PARAM = 'subscriptions';
-
-  /**
    * The analysis server that is using this handler to process requests.
    */
   final AnalysisServer server;
 
   /**
    * Initialize a newly created handler to handle requests for the given [server].
    */
   AnalysisDomainHandler(this.server);
 
   @override
   Response handleRequest(Request request) {
     try {
       String requestName = request.method;
-      if (requestName == GET_FIXES_METHOD) {
+      if (requestName == METHOD_GET_FIXES) {
         return getFixes(request);
-      } else if (requestName == GET_MINOR_REFACTORINGS_METHOD) {
+      } else if (requestName == METHOD_GET_MINOR_REFACTORINGS) {
           return getMinorRefactorings(request);
-      } else if (requestName == SET_ANALYSIS_ROOTS_METHOD) {
+      } else if (requestName == METHOD_SET_ANALYSIS_ROOTS) {
         return setAnalysisRoots(request);
-      } else if (requestName == SET_PRIORITY_FILES_METHOD) {
+      } else if (requestName == METHOD_SET_PRIORITY_FILES) {
         return setPriorityFiles(request);
-      } else if (requestName == SET_SUBSCRIPTIONS_METHOD) {
+      } else if (requestName == METHOD_SET_SUBSCRIPTIONS) {
         return setSubscriptions(request);
-      } else if (requestName == UPDATE_CONTENT_METHOD) {
+      } else if (requestName == METHOD_UPDATE_CONTENT) {
         return updateContent(request);
-      } else if (requestName == UPDATE_OPTIONS_METHOD) {
+      } else if (requestName == METHOD_UPDATE_OPTIONS) {
         return updateOptions(request);
-      } else if (requestName == UPDATE_SDKS_METHOD) {
+      } else if (requestName == METHOD_UPDATE_SDKS) {
         return updateSdks(request);
       }
     } on RequestFailure catch (exception) {
       return exception.response;
     }
     return null;
   }
 
   Response getFixes(Request request) {
     // TODO(scheglov) implement
     return null;
   }
 
   Response getMinorRefactorings(Request request) {
     // TODO(scheglov) implement
     return null;
   }
 
   Response setAnalysisRoots(Request request) {
     // included
-    RequestDatum includedDatum = request.getRequiredParameter(INCLUDED_PARAM);
+    RequestDatum includedDatum = request.getRequiredParameter(INCLUDED);
     List<String> includedPaths = includedDatum.asStringList();
     // excluded
-    RequestDatum excludedDatum = request.getRequiredParameter(EXCLUDED_PARAM);
+    RequestDatum excludedDatum = request.getRequiredParameter(EXCLUDED);
     List<String> excludedPaths = excludedDatum.asStringList();
     // continue in server
     server.setAnalysisRoots(request.id, includedPaths, excludedPaths);
     return new Response(request.id);
   }
 
   Response setPriorityFiles(Request request) {
     // TODO(scheglov) implement
     return null;
   }
 
   Response setSubscriptions(Request request) {
     // TODO(scheglov) implement
     return null;
   }
 
   Response updateContent(Request request) {
     var changes = new Map<String, ContentChange>();
-    RequestDatum filesDatum = request.getRequiredParameter(FILES_PARAM);
+    RequestDatum filesDatum = request.getRequiredParameter(FILES);
     filesDatum.forEachMap((file, changeDatum) {
       var change = new ContentChange();
-      change.content = changeDatum[CONTENT_PARAM].asString();
-      if (changeDatum.hasKey(OFFSET_PARAM)) {
-        change.offset = changeDatum[OFFSET_PARAM].asInt();
-        change.oldLength = changeDatum[OLD_LENGTH_PARAM].asInt();
-        change.newLength = changeDatum[NEW_LENGTH_PARAM].asInt();
+      change.content = changeDatum[CONTENT].asString();
+      if (changeDatum.hasKey(OFFSET)) {
+        change.offset = changeDatum[OFFSET].asInt();
+        change.oldLength = changeDatum[OLD_LENGTH].asInt();
+        change.newLength = changeDatum[NEW_LENGTH].asInt();
       }
       changes[file] = change;
     });
     server.updateContent(changes);
     return new Response(request.id);
   }
 
   Response updateOptions(Request request) {
     // TODO(scheglov) implement
     return null;
   }
 
   Response updateSdks(Request request) {
     // TODO(scheglov) implement
     return null;
   }
 }
 
 
 /**
  * A description of the change to the content of a file.
  */
 class ContentChange {
   String content;
   int offset;
   int oldLength;
   int newLength;
 }