pkg/analyzer/lib/dart/analysis/context_builder.dart

// Copyright (c) 2018, 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.

import 'package:analyzer/dart/analysis/analysis_context.dart';
import 'package:analyzer/dart/analysis/context_root.dart';
import 'package:analyzer/dart/analysis/declared_variables.dart';
import 'package:analyzer/file_system/file_system.dart';
import 'package:analyzer/src/dart/analysis/context_builder.dart';
import 'package:meta/meta.dart';

/**
 * A utility class used to build an analysis context based on a context root.
 *
 * Clients may not extend, implement or mix-in this class.
 */
abstract class ContextBuilder {
  /**
   * Initialize a newly created context builder. If a [resourceProvider] is
   * given, then it will be used to access the file system, otherwise the
   * default resource provider will be used.
   */
  factory ContextBuilder({ResourceProvider resourceProvider}) =
      ContextBuilderImpl;

  /**
   * Return an analysis context corresponding to the given [contextRoot].
   *
   * If a set of [declaredVariables] is provided, the values will be used to map
   * the the variable names found in `fromEnvironment` invocations to the
   * constant value that will be returned. If none is given, then no variables
   * will be defined.
   *
   * If an [sdkPath] is provided, and if it is a valid path to a directory
   * containing a valid SDK, then the SDK in the referenced directory will be
   * used when analyzing the code in the context.
   */
  AnalysisContext createContext(
      {@required ContextRoot contextRoot,
      DeclaredVariables declaredVariables,
      String sdkPath});
}