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analyzer/lib/src/generated/source.dart

Index: analyzer/lib/src/generated/source.dart
diff --git a/analyzer/lib/src/generated/source.dart b/analyzer/lib/src/generated/source.dart
deleted file mode 100644
index 5b96dbd83198b1dc52ff1558ed8587a746e93809..0000000000000000000000000000000000000000
--- a/analyzer/lib/src/generated/source.dart
+++ /dev/null
@@ -1,1077 +0,0 @@
-// 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.
-
-// This code was auto-generated, is not intended to be edited, and is subject to
-// significant change. Please see the README file for more information.
-
-library engine.source;
-
-import 'dart:collection';
-import "dart:math" as math;
-
-import 'package:analyzer/file_system/file_system.dart';
-import 'package:analyzer/file_system/physical_file_system.dart';
-import 'package:analyzer/source/package_map_resolver.dart';
-import 'package:analyzer/src/generated/utilities_dart.dart' as utils;
-import 'package:analyzer/task/model.dart';
-import 'package:package_config/packages.dart';
-import 'package:path/path.dart' as pathos;
-
-import 'engine.dart';
-import 'java_core.dart';
-import 'java_engine.dart';
-import 'java_io.dart' show JavaFile;
-import 'sdk.dart' show DartSdk;
-import 'source_io.dart' show FileBasedSource;
-
-/**
- * A function that is used to visit [ContentCache] entries.
- */
-typedef void ContentCacheVisitor(String fullPath, int stamp, String contents);
-
-/**
- * A cache used to override the default content of a [Source].
- */
-class ContentCache {
-  /**
-   * A table mapping the full path of sources to the contents of those sources.
-   * This is used to override the default contents of a source.
-   */
-  HashMap<String, String> _contentMap = new HashMap<String, String>();
-
-  /**
-   * A table mapping the full path of sources to the modification stamps of
-   * those sources. This is used when the default contents of a source has been
-   * overridden.
-   */
-  HashMap<String, int> _stampMap = new HashMap<String, int>();
-
-  /**
-   * Visit all entries of this cache.
-   */
-  void accept(ContentCacheVisitor visitor) {
-    _contentMap.forEach((String fullPath, String contents) {
-      int stamp = _stampMap[fullPath];
-      visitor(fullPath, stamp, contents);
-    });
-  }
-
-  /**
-   * Return the contents of the given [source], or `null` if this cache does not
-   * override the contents of the source.
-   *
-   * <b>Note:</b> This method is not intended to be used except by
-   * [AnalysisContext.getContents].
-   */
-  String getContents(Source source) => _contentMap[source.fullName];
-
-  /**
-   * Return the modification stamp of the given [source], or `null` if this
-   * cache does not override the contents of the source.
-   *
-   * <b>Note:</b> This method is not intended to be used except by
-   * [AnalysisContext.getModificationStamp].
-   */
-  int getModificationStamp(Source source) => _stampMap[source.fullName];
-
-  /**
-   * Set the contents of the given [source] to the given [contents]. This has
-   * the effect of overriding the default contents of the source. If the
-   * contents are `null` the override is removed so that the default contents
-   * will be returned.
-   */
-  String setContents(Source source, String contents) {
-    String fullName = source.fullName;
-    if (contents == null) {
-      _stampMap.remove(fullName);
-      return _contentMap.remove(fullName);
-    } else {
-      int newStamp = JavaSystem.currentTimeMillis();
-      int oldStamp = _stampMap[fullName];
-      _stampMap[fullName] = newStamp;
-      // Occasionally, if this method is called in rapid succession, the
-      // timestamps are equal. Guard against this by artificially incrementing
-      // the new timestamp.
-      if (newStamp == oldStamp) {
-        _stampMap[fullName] = newStamp + 1;
-      }
-      String oldContent = _contentMap[fullName];
-      _contentMap[fullName] = contents;
-      return oldContent;
-    }
-  }
-}
-
-class CustomUriResolver extends UriResolver {
-  final Map<String, String> _urlMappings;
-
-  CustomUriResolver(this._urlMappings);
-
-  @override
-  Source resolveAbsolute(Uri uri) {
-    String mapping = _urlMappings[uri.toString()];
-    if (mapping == null) return null;
-
-    Uri fileUri = new Uri.file(mapping);
-    if (!fileUri.isAbsolute) return null;
-
-    JavaFile javaFile = new JavaFile.fromUri(fileUri);
-    return new FileBasedSource(javaFile);
-  }
-}
-
-/**
- * Instances of the class `DartUriResolver` resolve `dart` URI's.
- */
-class DartUriResolver extends UriResolver {
-  /**
-   * The name of the `dart` scheme.
-   */
-  static String DART_SCHEME = "dart";
-
-  /**
-   * The prefix of a URI using the dart-ext scheme to reference a native code library.
-   */
-  static String _DART_EXT_SCHEME = "dart-ext:";
-
-  /**
-   * The Dart SDK against which URI's are to be resolved.
-   */
-  final DartSdk _sdk;
-
-  /**
-   * Initialize a newly created resolver to resolve Dart URI's against the given platform within the
-   * given Dart SDK.
-   *
-   * @param sdk the Dart SDK against which URI's are to be resolved
-   */
-  DartUriResolver(this._sdk);
-
-  /**
-   * Return the [DartSdk] against which URIs are to be resolved.
-   *
-   * @return the [DartSdk] against which URIs are to be resolved.
-   */
-  DartSdk get dartSdk => _sdk;
-
-  @override
-  Source resolveAbsolute(Uri uri) {
-    if (!isDartUri(uri)) {
-      return null;
-    }
-    return _sdk.mapDartUri(uri.toString());
-  }
-
-  /**
-   * Return `true` if the given URI is a `dart-ext:` URI.
-   *
-   * @param uriContent the textual representation of the URI being tested
-   * @return `true` if the given URI is a `dart-ext:` URI
-   */
-  static bool isDartExtUri(String uriContent) =>
-      uriContent != null && uriContent.startsWith(_DART_EXT_SCHEME);
-
-  /**
-   * Return `true` if the given URI is a `dart:` URI.
-   *
-   * @param uri the URI being tested
-   * @return `true` if the given URI is a `dart:` URI
-   */
-  static bool isDartUri(Uri uri) => DART_SCHEME == uri.scheme;
-}
-
-/**
- * Instances of the class `LineInfo` encapsulate information about line and column information
- * within a source file.
- */
-class LineInfo {
-  /**
-   * An array containing the offsets of the first character of each line in the source code.
-   */
-  final List<int> _lineStarts;
-
-  /**
-   * The zero-based [_lineStarts] index resulting from the last call to
-   * [getLocation].
-   */
-  int _previousLine = 0;
-
-  /**
-   * Initialize a newly created set of line information to represent the data encoded in the given
-   * array.
-   *
-   * @param lineStarts the offsets of the first character of each line in the source code
-   */
-  LineInfo(this._lineStarts) {
-    if (_lineStarts == null) {
-      throw new IllegalArgumentException("lineStarts must be non-null");
-    } else if (_lineStarts.length < 1) {
-      throw new IllegalArgumentException("lineStarts must be non-empty");
-    }
-  }
-
-  /**
-   * Return the location information for the character at the given offset.
-   *
-   * @param offset the offset of the character for which location information is to be returned
-   * @return the location information for the character at the given offset
-   */
-  LineInfo_Location getLocation(int offset) {
-    var min = 0;
-    var max = _lineStarts.length - 1;
-
-    // Subsequent calls to [getLocation] are often for offsets near each other.
-    // To take advantage of that, we cache the index of the line start we found
-    // when this was last called. If the current offset is on that line or
-    // later, we'll skip those early indices completely when searching.
-    if (offset >= _lineStarts[_previousLine]) {
-      min = _previousLine;
-
-      // Before kicking off a full binary search, do a quick check here to see
-      // if the new offset is on that exact line.
-      if (min == _lineStarts.length - 1 || offset < _lineStarts[min + 1]) {
-        return new LineInfo_Location(min + 1, offset - _lineStarts[min] + 1);
-      }
-    }
-
-    // Binary search to fine the line containing this offset.
-    while (min < max) {
-      var midpoint = (max - min + 1) ~/ 2 + min;
-
-      if (_lineStarts[midpoint] > offset) {
-        max = midpoint - 1;
-      } else {
-        min = midpoint;
-      }
-    }
-
-    _previousLine = min;
-
-    return new LineInfo_Location(min + 1, offset - _lineStarts[min] + 1);
-  }
-}
-
-/**
- * Instances of the class `Location` represent the location of a character as a line and
- * column pair.
- */
-class LineInfo_Location {
-  /**
-   * The one-based index of the line containing the character.
-   */
-  final int lineNumber;
-
-  /**
-   * The one-based index of the column containing the character.
-   */
-  final int columnNumber;
-
-  /**
-   * Initialize a newly created location to represent the location of the character at the given
-   * line and column position.
-   *
-   * @param lineNumber the one-based index of the line containing the character
-   * @param columnNumber the one-based index of the column containing the character
-   */
-  LineInfo_Location(this.lineNumber, this.columnNumber);
-}
-
-/**
- * Instances of interface `LocalSourcePredicate` are used to determine if the given
- * [Source] is "local" in some sense, so can be updated.
- */
-abstract class LocalSourcePredicate {
-  /**
-   * Instance of [LocalSourcePredicate] that always returns `false`.
-   */
-  static final LocalSourcePredicate FALSE = new LocalSourcePredicate_FALSE();
-
-  /**
-   * Instance of [LocalSourcePredicate] that always returns `true`.
-   */
-  static final LocalSourcePredicate TRUE = new LocalSourcePredicate_TRUE();
-
-  /**
-   * Instance of [LocalSourcePredicate] that returns `true` for all [Source]s
-   * except of SDK.
-   */
-  static final LocalSourcePredicate NOT_SDK =
-      new LocalSourcePredicate_NOT_SDK();
-
-  /**
-   * Determines if the given [Source] is local.
-   *
-   * @param source the [Source] to analyze
-   * @return `true` if the given [Source] is local
-   */
-  bool isLocal(Source source);
-}
-
-class LocalSourcePredicate_FALSE implements LocalSourcePredicate {
-  @override
-  bool isLocal(Source source) => false;
-}
-
-class LocalSourcePredicate_NOT_SDK implements LocalSourcePredicate {
-  @override
-  bool isLocal(Source source) => source.uriKind != UriKind.DART_URI;
-}
-
-class LocalSourcePredicate_TRUE implements LocalSourcePredicate {
-  @override
-  bool isLocal(Source source) => true;
-}
-
-/**
- * An implementation of an non-existing [Source].
- */
-class NonExistingSource extends Source {
-  @override
-  final String fullName;
-
-  @override
-  final Uri uri;
-
-  final UriKind uriKind;
-
-  NonExistingSource(this.fullName, this.uri, this.uriKind);
-
-  @override
-  TimestampedData<String> get contents {
-    throw new UnsupportedOperationException('$fullName does not exist.');
-  }
-
-  @override
-  String get encoding {
-    throw new UnsupportedOperationException('$fullName does not exist.');
-  }
-
-  @override
-  int get hashCode => fullName.hashCode;
-
-  @override
-  bool get isInSystemLibrary => false;
-
-  @override
-  int get modificationStamp => -1;
-
-  @override
-  String get shortName => pathos.basename(fullName);
-
-  @override
-  bool operator ==(Object other) {
-    if (other is NonExistingSource) {
-      return other.uriKind == uriKind && other.fullName == fullName;
-    }
-    return false;
-  }
-
-  @override
-  bool exists() => false;
-
-  @override
-  Uri resolveRelativeUri(Uri relativeUri) {
-    throw new UnsupportedOperationException('$fullName does not exist.');
-  }
-}
-
-/**
- * The interface `Source` defines the behavior of objects representing source code that can be
- * analyzed by the analysis engine.
- *
- * Implementations of this interface need to be aware of some assumptions made by the analysis
- * engine concerning sources:
- * * Sources are not required to be unique. That is, there can be multiple instances representing
- * the same source.
- * * Sources are long lived. That is, the engine is allowed to hold on to a source for an extended
- * period of time and that source must continue to report accurate and up-to-date information.
- * Because of these assumptions, most implementations will not maintain any state but will delegate
- * to an authoritative system of record in order to implement this API. For example, a source that
- * represents files on disk would typically query the file system to determine the state of the
- * file.
- *
- * If the instances that implement this API are the system of record, then they will typically be
- * unique. In that case, sources that are created that represent non-existent files must also be
- * retained so that if those files are created at a later date the long-lived sources representing
- * those files will know that they now exist.
- */
-abstract class Source implements AnalysisTarget {
-  /**
-   * An empty list of sources.
-   */
-  @deprecated // Use Source.EMPTY_LIST
-  static const List<Source> EMPTY_ARRAY = EMPTY_LIST;
-
-  /**
-   * An empty list of sources.
-   */
-  static const List<Source> EMPTY_LIST = const <Source>[];
-
-  /**
-   * Get the contents and timestamp of this source.
-   *
-   * Clients should consider using the the method [AnalysisContext.getContents]
-   * because contexts can have local overrides of the content of a source that the source is not
-   * aware of.
-   *
-   * @return the contents and timestamp of the source
-   * @throws Exception if the contents of this source could not be accessed
-   */
-  TimestampedData<String> get contents;
-
-  /**
-   * Return an encoded representation of this source that can be used to create a source that is
-   * equal to this source.
-   *
-   * @return an encoded representation of this source
-   * See [SourceFactory.fromEncoding].
-   */
-  String get encoding;
-
-  /**
-   * Return the full (long) version of the name that can be displayed to the user to denote this
-   * source. For example, for a source representing a file this would typically be the absolute path
-   * of the file.
-   *
-   * @return a name that can be displayed to the user to denote this source
-   */
-  String get fullName;
-
-  /**
-   * Return a hash code for this source.
-   *
-   * @return a hash code for this source
-   * See [Object.hashCode].
-   */
-  @override
-  int get hashCode;
-
-  /**
-   * Return `true` if this source is in one of the system libraries.
-   *
-   * @return `true` if this is in a system library
-   */
-  bool get isInSystemLibrary;
-
-  /**
-   * Return the modification stamp for this source, or a negative value if the
-   * source does not exist. A modification stamp is a non-negative integer with
-   * the property that if the contents of the source have not been modified
-   * since the last time the modification stamp was accessed then the same value
-   * will be returned, but if the contents of the source have been modified one
-   * or more times (even if the net change is zero) the stamps will be different.
-   *
-   * Clients should consider using the the method
-   * [AnalysisContext.getModificationStamp] because contexts can have local
-   * overrides of the content of a source that the source is not aware of.
-   */
-  int get modificationStamp;
-
-  /**
-   * Return a short version of the name that can be displayed to the user to denote this source. For
-   * example, for a source representing a file this would typically be the name of the file.
-   *
-   * @return a name that can be displayed to the user to denote this source
-   */
-  String get shortName;
-
-  @override
-  Source get source => this;
-
-  /**
-   * Return the URI from which this source was originally derived.
-   *
-   * @return the URI from which this source was originally derived
-   */
-  Uri get uri;
-
-  /**
-   * Return the kind of URI from which this source was originally derived. If this source was
-   * created from an absolute URI, then the returned kind will reflect the scheme of the absolute
-   * URI. If it was created from a relative URI, then the returned kind will be the same as the kind
-   * of the source against which the relative URI was resolved.
-   *
-   * @return the kind of URI from which this source was originally derived
-   */
-  UriKind get uriKind;
-
-  /**
-   * Return `true` if the given object is a source that represents the same source code as
-   * this source.
-   *
-   * @param object the object to be compared with this object
-   * @return `true` if the given object is a source that represents the same source code as
-   *         this source
-   * See [Object.==].
-   */
-  @override
-  bool operator ==(Object object);
-
-  /**
-   * Return `true` if this source exists.
-   *
-   * Clients should consider using the the method [AnalysisContext.exists] because
-   * contexts can have local overrides of the content of a source that the source is not aware of
-   * and a source with local content is considered to exist even if there is no file on disk.
-   *
-   * @return `true` if this source exists
-   */
-  bool exists();
-
-  /**
-   * Resolve the relative URI against the URI associated with this source object.
-   *
-   * Note: This method is not intended for public use, it is only visible out of necessity. It is
-   * only intended to be invoked by a [SourceFactory]. Source factories will
-   * only invoke this method if the URI is relative, so implementations of this method are not
-   * required to, and generally do not, verify the argument. The result of invoking this method with
-   * an absolute URI is intentionally left unspecified.
-   *
-   * @param relativeUri the relative URI to be resolved against this source
-   * @return the URI to which given URI was resolved
-   * @throws AnalysisException if the relative URI could not be resolved
-   */
-  Uri resolveRelativeUri(Uri relativeUri);
-}
-
-/**
- * The interface `ContentReceiver` defines the behavior of objects that can receive the
- * content of a source.
- */
-abstract class Source_ContentReceiver {
-  /**
-   * Accept the contents of a source.
-   *
-   * @param contents the contents of the source
-   * @param modificationTime the time at which the contents were last set
-   */
-  void accept(String contents, int modificationTime);
-}
-
-/**
- * The interface `SourceContainer` is used by clients to define a collection of sources
- *
- * Source containers are not used within analysis engine, but can be used by clients to group
- * sources for the purposes of accessing composite dependency information. For example, the Eclipse
- * client uses source containers to represent Eclipse projects, which allows it to easily compute
- * project-level dependencies.
- */
-abstract class SourceContainer {
-  /**
-   * Determine if the specified source is part of the receiver's collection of sources.
-   *
-   * @param source the source in question
-   * @return `true` if the receiver contains the source, else `false`
-   */
-  bool contains(Source source);
-}
-
-/**
- * Instances of the class `SourceFactory` resolve possibly relative URI's against an existing
- * [Source].
- */
-class SourceFactory {
-  /**
-   * The analysis context that this source factory is associated with.
-   */
-  AnalysisContext context;
-
-  /**
-   * URI processor used to find mappings for `package:` URIs found in a `.packages` config
-   * file.
-   */
-  final Packages _packages;
-
-  /**
-   * Resource provider used in working with package maps.
-   */
-  final ResourceProvider _resourceProvider;
-
-  /**
-   * The resolvers used to resolve absolute URI's.
-   */
-  final List<UriResolver> _resolvers;
-
-  /**
-   * The predicate to determine is [Source] is local.
-   */
-  LocalSourcePredicate _localSourcePredicate = LocalSourcePredicate.NOT_SDK;
-
-  /**
-   * Initialize a newly created source factory with the given absolute URI [resolvers] and
-   * optional [packages] resolution helper.
-   */
-  SourceFactory(this._resolvers,
-      [this._packages, ResourceProvider resourceProvider])
-      : _resourceProvider = resourceProvider != null
-          ? resourceProvider
-          : PhysicalResourceProvider.INSTANCE;
-
-  /**
-   * Return the [DartSdk] associated with this [SourceFactory], or `null` if there
-   * is no such SDK.
-   *
-   * @return the [DartSdk] associated with this [SourceFactory], or `null` if
-   *         there is no such SDK
-   */
-  DartSdk get dartSdk {
-    for (UriResolver resolver in _resolvers) {
-      if (resolver is DartUriResolver) {
-        DartUriResolver dartUriResolver = resolver;
-        return dartUriResolver.dartSdk;
-      }
-    }
-    return null;
-  }
-
-  /**
-   * Sets the [LocalSourcePredicate].
-   *
-   * @param localSourcePredicate the predicate to determine is [Source] is local
-   */
-  void set localSourcePredicate(LocalSourcePredicate localSourcePredicate) {
-    this._localSourcePredicate = localSourcePredicate;
-  }
-
-  /// A table mapping package names to paths of directories containing
-  /// the package (or [null] if there is no registered package URI resolver).
-  Map<String, List<Folder>> get packageMap {
-    // Start by looking in .packages.
-    if (_packages != null) {
-      Map<String, List<Folder>> packageMap = <String, List<Folder>>{};
-      _packages.asMap().forEach((String name, Uri uri) {
-        if (uri.scheme == 'file' || uri.scheme == '' /* unspecified */) {
-          packageMap[name] =
-              <Folder>[_resourceProvider.getFolder(uri.toFilePath())];
-        }
-      });
-      return packageMap;
-    }
-
-    // Default to the PackageMapUriResolver.
-    PackageMapUriResolver resolver = _resolvers.firstWhere(
-        (r) => r is PackageMapUriResolver, orElse: () => null);
-    return resolver != null ? resolver.packageMap : null;
-  }
-
-  /**
-   * Return a source object representing the given absolute URI, or `null` if the URI is not a
-   * valid URI or if it is not an absolute URI.
-   *
-   * @param absoluteUri the absolute URI to be resolved
-   * @return a source object representing the absolute URI
-   */
-  Source forUri(String absoluteUri) {
-    try {
-      Uri uri = parseUriWithException(absoluteUri);
-      if (uri.isAbsolute) {
-        return _internalResolveUri(null, uri);
-      }
-    } catch (exception, stackTrace) {
-      AnalysisEngine.instance.logger.logError(
-          "Could not resolve URI: $absoluteUri",
-          new CaughtException(exception, stackTrace));
-    }
-    return null;
-  }
-
-  /**
-   * Return a source object representing the given absolute URI, or `null` if the URI is not
-   * an absolute URI.
-   *
-   * @param absoluteUri the absolute URI to be resolved
-   * @return a source object representing the absolute URI
-   */
-  Source forUri2(Uri absoluteUri) {
-    if (absoluteUri.isAbsolute) {
-      try {
-        return _internalResolveUri(null, absoluteUri);
-      } on AnalysisException catch (exception, stackTrace) {
-        AnalysisEngine.instance.logger.logError(
-            "Could not resolve URI: $absoluteUri",
-            new CaughtException(exception, stackTrace));
-      }
-    }
-    return null;
-  }
-
-  /**
-   * Return a source object that is equal to the source object used to obtain the given encoding.
-   *
-   * @param encoding the encoding of a source object
-   * @return a source object that is described by the given encoding
-   * @throws IllegalArgumentException if the argument is not a valid encoding
-   * See [Source.encoding].
-   */
-  Source fromEncoding(String encoding) {
-    Source source = forUri(encoding);
-    if (source == null) {
-      throw new IllegalArgumentException(
-          "Invalid source encoding: '$encoding'");
-    }
-    return source;
-  }
-
-  /**
-   * Determines if the given [Source] is local.
-   *
-   * @param source the [Source] to analyze
-   * @return `true` if the given [Source] is local
-   */
-  bool isLocalSource(Source source) => _localSourcePredicate.isLocal(source);
-
-  /**
-   * Return a source object representing the URI that results from resolving the given (possibly
-   * relative) contained URI against the URI associated with an existing source object, whether or
-   * not the resulting source exists, or `null` if either the contained URI is invalid or if
-   * it cannot be resolved against the source object's URI.
-   *
-   * @param containingSource the source containing the given URI
-   * @param containedUri the (possibly relative) URI to be resolved against the containing source
-   * @return the source representing the contained URI
-   */
-  Source resolveUri(Source containingSource, String containedUri) {
-    if (containedUri == null || containedUri.isEmpty) {
-      return null;
-    }
-    try {
-      // Force the creation of an escaped URI to deal with spaces, etc.
-      return _internalResolveUri(
-          containingSource, parseUriWithException(containedUri));
-    } catch (exception, stackTrace) {
-      String containingFullName =
-          containingSource != null ? containingSource.fullName : '<null>';
-      AnalysisEngine.instance.logger.logError(
-          "Could not resolve URI ($containedUri) relative to source ($containingFullName)",
-          new CaughtException(exception, stackTrace));
-      return null;
-    }
-  }
-
-  /**
-   * Return an absolute URI that represents the given source, or `null` if a valid URI cannot
-   * be computed.
-   *
-   * @param source the source to get URI for
-   * @return the absolute URI representing the given source
-   */
-  Uri restoreUri(Source source) {
-    // First see if a resolver can restore the URI.
-    for (UriResolver resolver in _resolvers) {
-      Uri uri = resolver.restoreAbsolute(source);
-      if (uri != null) {
-        // Now see if there's a package mapping.
-        Uri packageMappedUri = _getPackageMapping(uri);
-        if (packageMappedUri != null) {
-          return packageMappedUri;
-        }
-        // Fall back to the resolver's computed URI.
-        return uri;
-      }
-    }
-
-    return null;
-  }
-
-  Uri _getPackageMapping(Uri sourceUri) {
-    if (_packages == null) {
-      return null;
-    }
-    if (sourceUri.scheme != 'file') {
-      //TODO(pquitslund): verify this works for non-file URIs.
-      return null;
-    }
-
-    Uri packageUri;
-    _packages.asMap().forEach((String name, Uri uri) {
-      if (packageUri == null) {
-        if (utils.startsWith(sourceUri, uri)) {
-          packageUri = Uri.parse(
-              'package:$name/${sourceUri.path.substring(uri.path.length)}');
-        }
-      }
-    });
-    return packageUri;
-  }
-
-  /**
-   * Return a source object representing the URI that results from resolving the given (possibly
-   * relative) contained URI against the URI associated with an existing source object, or
-   * `null` if the URI could not be resolved.
-   *
-   * @param containingSource the source containing the given URI
-   * @param containedUri the (possibly relative) URI to be resolved against the containing source
-   * @return the source representing the contained URI
-   * @throws AnalysisException if either the contained URI is invalid or if it cannot be resolved
-   *           against the source object's URI
-   */
-  Source _internalResolveUri(Source containingSource, Uri containedUri) {
-    if (!containedUri.isAbsolute) {
-      if (containingSource == null) {
-        throw new AnalysisException(
-            "Cannot resolve a relative URI without a containing source: $containedUri");
-      }
-      containedUri = containingSource.resolveRelativeUri(containedUri);
-    }
-    // Now check .packages.
-    if (_packages != null && containedUri.scheme == 'package') {
-      Uri packageUri =
-          _packages.resolve(containedUri, notFound: (Uri packageUri) => null);
-      // Ensure scheme is set.
-      if (packageUri != null && packageUri.scheme == '') {
-        packageUri = packageUri.replace(scheme: 'file');
-      }
-      containedUri = packageUri;
-    }
-    for (UriResolver resolver in _resolvers) {
-      Source result = resolver.resolveAbsolute(containedUri);
-      if (result != null) {
-        return result;
-      }
-    }
-    return null;
-  }
-}
-
-/**
- * The enumeration `SourceKind` defines the different kinds of sources that are known to the
- * analysis engine.
- */
-class SourceKind extends Enum<SourceKind> {
-  /**
-   * A source containing HTML. The HTML might or might not contain Dart scripts.
-   */
-  static const SourceKind HTML = const SourceKind('HTML', 0);
-
-  /**
-   * A Dart compilation unit that is not a part of another library. Libraries might or might not
-   * contain any directives, including a library directive.
-   */
-  static const SourceKind LIBRARY = const SourceKind('LIBRARY', 1);
-
-  /**
-   * A Dart compilation unit that is part of another library. Parts contain a part-of directive.
-   */
-  static const SourceKind PART = const SourceKind('PART', 2);
-
-  /**
-   * An unknown kind of source. Used both when it is not possible to identify the kind of a source
-   * and also when the kind of a source is not known without performing a computation and the client
-   * does not want to spend the time to identify the kind.
-   */
-  static const SourceKind UNKNOWN = const SourceKind('UNKNOWN', 3);
-
-  static const List<SourceKind> values = const [HTML, LIBRARY, PART, UNKNOWN];
-
-  const SourceKind(String name, int ordinal) : super(name, ordinal);
-}
-
-/**
- * A source range defines an [Element]'s source coordinates relative to its [Source].
- */
-class SourceRange {
-  /**
-   * An empty [SourceRange] with offset `0` and length `0`.
-   */
-  static SourceRange EMPTY = new SourceRange(0, 0);
-
-  /**
-   * The 0-based index of the first character of the source code for this element, relative to the
-   * source buffer in which this element is contained.
-   */
-  final int offset;
-
-  /**
-   * The number of characters of the source code for this element, relative to the source buffer in
-   * which this element is contained.
-   */
-  final int length;
-
-  /**
-   * Initialize a newly created source range using the given offset and the given length.
-   *
-   * @param offset the given offset
-   * @param length the given length
-   */
-  SourceRange(this.offset, this.length);
-
-  /**
-   * @return the 0-based index of the after-last character of the source code for this element,
-   *         relative to the source buffer in which this element is contained.
-   */
-  int get end => offset + length;
-
-  @override
-  int get hashCode => 31 * offset + length;
-
-  @override
-  bool operator ==(Object obj) {
-    if (obj is! SourceRange) {
-      return false;
-    }
-    SourceRange sourceRange = obj as SourceRange;
-    return sourceRange.offset == offset && sourceRange.length == length;
-  }
-
-  /**
-   * @return `true` if <code>x</code> is in [offset, offset + length) interval.
-   */
-  bool contains(int x) => offset <= x && x < offset + length;
-
-  /**
-   * @return `true` if <code>x</code> is in (offset, offset + length) interval.
-   */
-  bool containsExclusive(int x) => offset < x && x < offset + length;
-
-  /**
-   * @return `true` if <code>otherRange</code> covers this [SourceRange].
-   */
-  bool coveredBy(SourceRange otherRange) => otherRange.covers(this);
-
-  /**
-   * @return `true` if this [SourceRange] covers <code>otherRange</code>.
-   */
-  bool covers(SourceRange otherRange) =>
-      offset <= otherRange.offset && otherRange.end <= end;
-
-  /**
-   * @return `true` if this [SourceRange] ends in <code>otherRange</code>.
-   */
-  bool endsIn(SourceRange otherRange) {
-    int thisEnd = end;
-    return otherRange.contains(thisEnd);
-  }
-
-  /**
-   * @return the expanded instance of [SourceRange], which has the same center.
-   */
-  SourceRange getExpanded(int delta) =>
-      new SourceRange(offset - delta, delta + length + delta);
-
-  /**
-   * @return the instance of [SourceRange] with end moved on "delta".
-   */
-  SourceRange getMoveEnd(int delta) => new SourceRange(offset, length + delta);
-
-  /**
-   * @return the expanded translated of [SourceRange], with moved start and the same length.
-   */
-  SourceRange getTranslated(int delta) =>
-      new SourceRange(offset + delta, length);
-
-  /**
-   * @return the minimal [SourceRange] that cover this and the given [SourceRange]s.
-   */
-  SourceRange getUnion(SourceRange other) {
-    int newOffset = math.min(offset, other.offset);
-    int newEnd = math.max(offset + length, other.offset + other.length);
-    return new SourceRange(newOffset, newEnd - newOffset);
-  }
-
-  /**
-   * @return `true` if this [SourceRange] intersects with given.
-   */
-  bool intersects(SourceRange other) {
-    if (other == null) {
-      return false;
-    }
-    if (end <= other.offset) {
-      return false;
-    }
-    if (offset >= other.end) {
-      return false;
-    }
-    return true;
-  }
-
-  /**
-   * Return `true` if this [SourceRange] starts in the [otherRange].
-   */
-  bool startsIn(SourceRange otherRange) => otherRange.contains(offset);
-
-  @override
-  String toString() => '[offset=$offset, length=$length]';
-}
-
-/**
- * The enumeration `UriKind` defines the different kinds of URI's that are known to the
- * analysis engine. These are used to keep track of the kind of URI associated with a given source.
- */
-class UriKind extends Enum<UriKind> {
-  /**
-   * A 'dart:' URI.
-   */
-  static const UriKind DART_URI = const UriKind('DART_URI', 0, 0x64);
-
-  /**
-   * A 'file:' URI.
-   */
-  static const UriKind FILE_URI = const UriKind('FILE_URI', 1, 0x66);
-
-  /**
-   * A 'package:' URI.
-   */
-  static const UriKind PACKAGE_URI = const UriKind('PACKAGE_URI', 2, 0x70);
-
-  static const List<UriKind> values = const [DART_URI, FILE_URI, PACKAGE_URI];
-
-  /**
-   * The single character encoding used to identify this kind of URI.
-   */
-  final int encoding;
-
-  /**
-   * Initialize a newly created URI kind to have the given encoding.
-   *
-   * @param encoding the single character encoding used to identify this kind of URI.
-   */
-  const UriKind(String name, int ordinal, this.encoding) : super(name, ordinal);
-
-  /**
-   * Return the URI kind represented by the given encoding, or `null` if there is no kind with
-   * the given encoding.
-   *
-   * @param encoding the single character encoding used to identify the URI kind to be returned
-   * @return the URI kind represented by the given encoding
-   */
-  static UriKind fromEncoding(int encoding) {
-    while (true) {
-      if (encoding == 0x64) {
-        return DART_URI;
-      } else if (encoding == 0x66) {
-        return FILE_URI;
-      } else if (encoding == 0x70) {
-        return PACKAGE_URI;
-      }
-      break;
-    }
-    return null;
-  }
-}
-
-/**
- * The abstract class `UriResolver` defines the behavior of objects that are used to resolve
- * URI's for a source factory. Subclasses of this class are expected to resolve a single scheme of
- * absolute URI.
- */
-abstract class UriResolver {
-  /**
-   * Resolve the given absolute URI. Return a [Source] representing the file to which
-   * it was resolved, whether or not the resulting source exists, or `null` if it could not be
-   * resolved because the URI is invalid.
-   *
-   * @param uri the URI to be resolved
-   * @return a [Source] representing the file to which given URI was resolved
-   */
-  Source resolveAbsolute(Uri uri);
-
-  /**
-   * Return an absolute URI that represents the given source, or `null` if a valid URI cannot
-   * be computed.
-   *
-   * @param source the source to get URI for
-   * @return the absolute URI representing the given source
-   */
-  Uri restoreAbsolute(Source source) => null;
-}