Add server and request handlers

pkg/analysis_server/lib/src/domain_context.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.context;
+
+import 'package:analyzer/src/generated/engine.dart';
+import 'package:analyzer/src/generated/source.dart';
+
+import 'analysis_server.dart';
+import 'protocol.dart';
+
+/**
+ * Instances of the class [ContextDomainHandler] implement a [RequestHandler]
+ * that handles requests in the server domain.

[danrubel, 2014/01/22 01:04:07]

server domain -> context domain ?

[Brian Wilkerson, 2014/01/24 21:49:27]

Done

+ */
+class ContextDomainHandler implements RequestHandler {
+  /**
+   * The name of the context.applyChanges request.
+   */
+  static const String APPLY_CHANGES_NAME = 'context.applyChanges';
+
+  /**
+   * The name of the context.setOptions request.
+   */
+  static const String SET_OPTIONS_NAME = 'context.setOptions';
+
+  /**
+   * The name of the context.setPrioritySources request.
+   */
+  static const String SET_PRIORITY_SOURCES_NAME = 'context.setPrioritySources';
+
+  /**
+   * The name of the changes parameter.
+   */
+  static const String CHANGES_PARAM = 'changes';
+
+  /**
+   * The name of the contextId parameter.
+   */
+  static const String CONTEXT_ID_PARAM = 'contextId';
+
+  /**
+   * The name of the options parameter.
+   */
+  static const String OPTIONS_PARAM = 'options';
+
+  /**
+   * The name of the sources parameter.
+   */
+  static const String SOURCES_PARAM = 'sources';
+
+  /**
+   * The name of the cacheSize option.
+   */
+  static const String CACHE_SIZE_OPTION = 'cacheSize';
+
+  /**
+   * The name of the generateHints option.
+   */
+  static const String GENERATE_HINTS_OPTION = 'generateHints';
+
+  /**
+   * The name of the generateDart2jsHints option.
+   */
+  static const String GENERATE_DART2JS_OPTION = 'generateDart2jsHints';
+
+  /**
+   * The name of the provideErrors option.
+   */
+  static const String PROVIDE_ERRORS_OPTION = 'provideErrors';
+
+  /**
+   * The name of the provideNavigation option.
+   */
+  static const String PROVIDE_NAVIGATION_OPTION = 'provideNavigation';
+
+  /**
+   * The name of the provideOutline option.
+   */
+  static const String PROVIDE_OUTLINE_OPTION = 'provideOutline';
+
+  /**
+   * 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].
+   */
+  ContextDomainHandler(this.server);
+
+  @override
+  Response handleRequest(Request request) {
+    try {
+      String requestName = request.method;
+      if (requestName == APPLY_CHANGES_NAME) {
+        applyChanges(request);
+      } else if (requestName == SET_OPTIONS_NAME) {
+        setOptions(request);
+      } else if (requestName == SET_PRIORITY_SOURCES_NAME) {
+        setPrioritySources(request);
+      }
+    } on RequestFailure catch (exception) {
+      return exception.response;
+    }
+  }
+
+  /**
+   * Inform the specified context that the changes encoded in the change set
+   * have been made. Any invalidated analysis results will be flushed from the
+   * context.
+   */
+  Response applyChanges(Request request) {
+    AnalysisContext context = getAnalysisContext(request);
+    Map<String, Object> changesData = request.getRequiredParameter(CHANGES_PARAM);
+    ChangeSet changeSet = createChangeSet(changesData);
+
+    context.applyChanges(changeSet);
+  }
+
+  /**
+   * Convert the given JSON object into a [ChangeSet].
+   */
+  ChangeSet createChangeSet(Map<String, Object> jsonData) {
+    // TODO(brianwilkerson) Implement this.
+    return null;
+  }
+
+  /**
+   * Set the options controlling analysis within a context to the given set of
+   * options.
+   */
+  Response setOptions(Request request) {
+    AnalysisContext context = getAnalysisContext(request);
+
+    context.analysisOptions = createAnalysisOptions(request);
+  }
+
+  /**
+   * Return the set of analysis options associated with the given [request], or
+   * throw a [RequestFailure] exception if the analysis options are not valid.
+   */
+  AnalysisOptions createAnalysisOptions(Request request) {
+    Map<String, Object> optionsData = request.getRequiredParameter(OPTIONS_PARAM);
+    AnalysisOptionsImpl options = new AnalysisOptionsImpl();
+    optionsData.forEach((String key, Object value) {
+      if (key == CACHE_SIZE_OPTION) {
+        options.cacheSize = request.toInt(value);
+      } else if (key == GENERATE_HINTS_OPTION) {
+        options.hint = request.toBool(value);
+      } else if (key == GENERATE_DART2JS_OPTION) {
+        options.dart2jsHint = request.toBool(value);
+      } else if (key == PROVIDE_ERRORS_OPTION) {
+//        options.provideErrors = toBool(request, value);
+      } else if (key == PROVIDE_NAVIGATION_OPTION) {
+//        options.provideNavigation = toBool(request, value);
+      } else if (key == PROVIDE_OUTLINE_OPTION) {
+//        options.provideOutline = toBool(request, value);
+      } else {
+        throw new RequestFailure(new Response.unknownAnalysisOption(request, key));
+      }
+    });
+    return options;
+  }
+
+  /**
+   * Set the priority sources in the specified context to the sources in the
+   * given array.
+   */
+  Response setPrioritySources(Request request) {
+    AnalysisContext context = getAnalysisContext(request);
+    List<String> sourcesData = request.getRequiredParameter(SOURCES_PARAM);
+    List<Source> sources = convertToSources(context.sourceFactory, sourcesData);
+
+    context.analysisPriorityOrder = sources;
+  }
+
+  /**
+   * Convert the given list of strings into a list of sources owned by the given
+   * [sourceFactory].
+   */
+  List<Source> convertToSources(SourceFactory sourceFactory, List<String> sourcesData) {
+    List<Source> sources = new List<Source>();
+    sourcesData.forEach((String string) {
+      sources.add(sourceFactory.fromEncoding(string));
+    });
+    return sources;
+  }
+
+  /**
+   * Return the analysis context specified by the given request, or throw a
+   * [RequestFailure] exception if either there is no specified context or if
+   * the specified context does not exist.
+   */
+  AnalysisContext getAnalysisContext(Request request) {
+    String contextId = request.getRequiredParameter(CONTEXT_ID_PARAM);
+    AnalysisContext context = server.contextMap[contextId];
+    if (context == null) {
+      throw new RequestFailure(new Response.contextDoesNotExist(request));
+    }
+    return context;
+  }
+}