Roll Observatory packages and add a roll script

analyzer/lib/src/task/manager.dart

-// Copyright (c) 2015, 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 analyzer.src.task.manager;
-
-import 'dart:collection';
-
-import 'package:analyzer/src/generated/java_engine.dart';
-import 'package:analyzer/task/model.dart';
-
-/**
- * An object that manages the information about the tasks that have been
- * defined.
- */
-class TaskManager {
-  /**
-   * A table mapping [ResultDescriptor]s to a list of [TaskDescriptor]s
-   * for the tasks that can be used to compute the result.
-   */
-  Map<ResultDescriptor, List<TaskDescriptor>> taskMap =
-      new HashMap<ResultDescriptor, List<TaskDescriptor>>();
-
-  /**
-   * A list of the results that are to be computed for all sources within an
-   * analysis root.
-   */
-  Set<ResultDescriptor> generalResults = new Set<ResultDescriptor>();
-
-  /**
-   * A list of the results that are to be computed for priority sources.
-   */
-  Set<ResultDescriptor> priorityResults = new Set<ResultDescriptor>();
-
-  /**
-   * Add the given [result] to the list of results that are to be computed for
-   * all sources within an analysis root.
-   */
-  void addGeneralResult(ResultDescriptor result) {
-    generalResults.add(result);
-  }
-
-  /**
-   * Add the given [result] to the list of results that are to be computed for
-   * priority sources.
-   */
-  void addPriorityResult(ResultDescriptor result) {
-    priorityResults.add(result);
-  }
-
-  /**
-   * Add the given [descriptor] to the list of analysis task descriptors that
-   * can be used to compute analysis results.
-   */
-  void addTaskDescriptor(TaskDescriptor descriptor) {
-    descriptor.results.forEach((ResultDescriptor result) {
-      //
-      // Add the result to the task map.
-      //
-      List<TaskDescriptor> descriptors = taskMap[result];
-      if (descriptors == null) {
-        descriptors = <TaskDescriptor>[];
-        taskMap[result] = descriptors;
-      }
-      descriptors.add(descriptor);
-    });
-  }
-
-  /**
-   * Add the task descriptors in the given list of [descriptors] to the list of
-   * analysis task descriptors that can be used to compute analysis results.
-   */
-  void addTaskDescriptors(List<TaskDescriptor> descriptors) {
-    descriptors.forEach(addTaskDescriptor);
-  }
-
-  /**
-   * Find a task that will compute the given [result] for the given [target].
-   */
-  TaskDescriptor findTask(AnalysisTarget target, ResultDescriptor result) {
-    List<TaskDescriptor> descriptors = taskMap[result];
-    if (descriptors == null) {
-      throw new AnalysisException(
-          'No tasks registered to compute $result for $target');
-    }
-    return _findBestTask(descriptors);
-  }
-
-  /**
-   * Remove the given [result] from the list of results that are to be computed
-   * for all sources within an analysis root.
-   */
-  void removeGeneralResult(ResultDescriptor result) {
-    generalResults.remove(result);
-  }
-
-  /**
-   * Remove the given [result] from the list of results that are to be computed
-   * for priority sources.
-   */
-  void removePriorityResult(ResultDescriptor result) {
-    priorityResults.remove(result);
-  }
-
-  /**
-   * Given a list of task [descriptors] that can be used to compute some
-   * unspecified result, return the descriptor that will compute the result with
-   * the least amount of work.
-   */
-  TaskDescriptor _findBestTask(List<TaskDescriptor> descriptors) {
-    // TODO(brianwilkerson) Improve this implementation.
-    return descriptors[0];
-  }
-}