Removed fixed dependencies

packages/analyzer/lib/src/summary/package_bundle_reader.dart

Index: packages/analyzer/lib/src/summary/package_bundle_reader.dart
diff --git a/packages/analyzer/lib/src/summary/package_bundle_reader.dart b/packages/analyzer/lib/src/summary/package_bundle_reader.dart
new file mode 100644
index 0000000000000000000000000000000000000000..c60f8ba6ca024cde45bbd0993ba8746a38de4248
--- /dev/null
+++ b/packages/analyzer/lib/src/summary/package_bundle_reader.dart
@@ -0,0 +1,499 @@
+import 'dart:io' as io;
+
+import 'package:analyzer/dart/element/element.dart';
+import 'package:analyzer/file_system/file_system.dart';
+import 'package:analyzer/src/context/cache.dart';
+import 'package:analyzer/src/context/context.dart';
+import 'package:analyzer/src/dart/element/element.dart';
+import 'package:analyzer/src/generated/engine.dart';
+import 'package:analyzer/src/generated/java_io.dart';
+import 'package:analyzer/src/generated/resolver.dart';
+import 'package:analyzer/src/generated/source.dart';
+import 'package:analyzer/src/generated/source_io.dart';
+import 'package:analyzer/src/generated/utilities_dart.dart';
+import 'package:analyzer/src/source/source_resource.dart';
+import 'package:analyzer/src/summary/format.dart';
+import 'package:analyzer/src/summary/idl.dart';
+import 'package:analyzer/src/summary/resynthesize.dart';
+import 'package:analyzer/src/task/dart.dart';
+import 'package:analyzer/src/util/fast_uri.dart';
+import 'package:analyzer/task/dart.dart';
+import 'package:analyzer/task/general.dart';
+import 'package:analyzer/task/model.dart';
+import 'package:path/path.dart' as pathos;
+
+/**
+ * The [ResultProvider] that provides results from input package summaries.
+ */
+class InputPackagesResultProvider extends ResynthesizerResultProvider {
+  InputPackagesResultProvider(
+      InternalAnalysisContext context, SummaryDataStore dataStore)
+      : super(context, dataStore) {
+    AnalysisContext sdkContext = context.sourceFactory.dartSdk.context;
+    createResynthesizer(sdkContext, sdkContext.typeProvider);
+  }
+
+  @override
+  bool hasResultsForSource(Source source) {
+    String uriString = source.uri.toString();
+    return resynthesizer.hasLibrarySummary(uriString);
+  }
+}
+
+/**
+ * The [UriResolver] that knows about sources that are served from their
+ * summaries.
+ */
+@deprecated
+class InSummaryPackageUriResolver extends UriResolver {
+  final SummaryDataStore _dataStore;
+
+  InSummaryPackageUriResolver(this._dataStore);
+
+  @override
+  Source resolveAbsolute(Uri uri, [Uri actualUri]) {
+    actualUri ??= uri;
+    String uriString = uri.toString();
+    UnlinkedUnit unit = _dataStore.unlinkedMap[uriString];
+    if (unit != null) {
+      String summaryPath = _dataStore.uriToSummaryPath[uriString];
+      if (unit.fallbackModePath.isNotEmpty) {
+        return new _InSummaryFallbackSource(
+            new JavaFile(unit.fallbackModePath), actualUri, summaryPath);
+      } else {
+        return new InSummarySource(actualUri, summaryPath);
+      }
+    }
+    return null;
+  }
+}
+
+/**
+ * A placeholder of a source that is part of a package whose analysis results
+ * are served from its summary.  This source uses its URI as [fullName] and has
+ * empty contents.
+ */
+class InSummarySource extends Source {
+  final Uri uri;
+
+  /**
+   * The summary file where this source was defined.
+   */
+  final String summaryPath;
+
+  InSummarySource(this.uri, this.summaryPath);
+
+  @override
+  TimestampedData<String> get contents => new TimestampedData<String>(0, '');
+
+  @override
+  String get encoding => uri.toString();
+
+  @override
+  String get fullName => encoding;
+
+  @override
+  int get hashCode => uri.hashCode;
+
+  @override
+  bool get isInSystemLibrary => uri.scheme == DartUriResolver.DART_SCHEME;
+
+  @override
+  int get modificationStamp => 0;
+
+  @override
+  String get shortName => pathos.basename(fullName);
+
+  @override
+  UriKind get uriKind => UriKind.PACKAGE_URI;
+
+  @override
+  bool operator ==(Object object) => object is Source && object.uri == uri;
+
+  @override
+  bool exists() => true;
+
+  @override
+  String toString() => uri.toString();
+}
+
+/**
+ * The [UriResolver] that knows about sources that are served from their
+ * summaries.
+ */
+class InSummaryUriResolver extends UriResolver {
+  ResourceProvider resourceProvider;
+  final SummaryDataStore _dataStore;
+
+  InSummaryUriResolver(this.resourceProvider, this._dataStore);
+
+  @override
+  Source resolveAbsolute(Uri uri, [Uri actualUri]) {
+    actualUri ??= uri;
+    String uriString = uri.toString();
+    UnlinkedUnit unit = _dataStore.unlinkedMap[uriString];
+    if (unit != null) {
+      String summaryPath = _dataStore.uriToSummaryPath[uriString];
+      if (unit.fallbackModePath.isNotEmpty) {
+        return new _InSummaryFallbackFileSource(
+            resourceProvider.getFile(unit.fallbackModePath),
+            actualUri,
+            summaryPath);
+      } else {
+        return new InSummarySource(actualUri, summaryPath);
+      }
+    }
+    return null;
+  }
+}
+
+/**
+ * The [ResultProvider] that provides results using summary resynthesizer.
+ */
+abstract class ResynthesizerResultProvider extends ResultProvider {
+  final InternalAnalysisContext context;
+  final SummaryDataStore _dataStore;
+
+  _FileBasedSummaryResynthesizer _resynthesizer;
+  ResynthesizerResultProvider _sdkProvider;
+
+  ResynthesizerResultProvider(this.context, this._dataStore);
+
+  SummaryResynthesizer get resynthesizer => _resynthesizer;
+
+  /**
+   * Add a new [bundle] to the resynthesizer.
+   */
+  void addBundle(String path, PackageBundle bundle) {
+    _dataStore.addBundle(path, bundle);
+  }
+
+  @override
+  bool compute(CacheEntry entry, ResultDescriptor result) {
+    if (_sdkProvider != null && _sdkProvider.compute(entry, result)) {
+      return true;
+    }
+    AnalysisTarget target = entry.target;
+    // Check whether there are results for the source.
+    if (!hasResultsForSource(target.librarySource ?? target.source)) {
+      return false;
+    }
+    // Constant expressions are always resolved in summaries.
+    if (result == CONSTANT_EXPRESSION_RESOLVED &&
+        target is ConstantEvaluationTarget) {
+      entry.setValue(
+          result as ResultDescriptor<bool>, true, TargetedResult.EMPTY_LIST);
+      return true;
+    }
+    // Provide results for Source.
+    if (target is Source) {
+      String uriString = target.uri.toString();
+      // Provide known results.
+      if (result == LIBRARY_ELEMENT1 ||
+          result == LIBRARY_ELEMENT2 ||
+          result == LIBRARY_ELEMENT3 ||
+          result == LIBRARY_ELEMENT4 ||
+          result == LIBRARY_ELEMENT5 ||
+          result == LIBRARY_ELEMENT6 ||
+          result == LIBRARY_ELEMENT7 ||
+          result == LIBRARY_ELEMENT8 ||
+          result == LIBRARY_ELEMENT9 ||
+          result == LIBRARY_ELEMENT) {
+        LibraryElement libraryElement =
+            resynthesizer.getLibraryElement(uriString);
+        entry.setValue(result as ResultDescriptor<LibraryElement>,
+            libraryElement, TargetedResult.EMPTY_LIST);
+        return true;
+      } else if (result == READY_LIBRARY_ELEMENT2 ||
+          result == READY_LIBRARY_ELEMENT6 ||
+          result == READY_LIBRARY_ELEMENT7) {
+        entry.setValue(
+            result as ResultDescriptor<bool>, true, TargetedResult.EMPTY_LIST);
+        return true;
+      } else if (result == MODIFICATION_TIME) {
+        entry.setValue(
+            result as ResultDescriptor<int>, 0, TargetedResult.EMPTY_LIST);
+        return true;
+      } else if (result == SOURCE_KIND) {
+        if (_dataStore.linkedMap.containsKey(uriString)) {
+          entry.setValue(result as ResultDescriptor<SourceKind>,
+              SourceKind.LIBRARY, TargetedResult.EMPTY_LIST);
+          return true;
+        }
+        if (_dataStore.unlinkedMap.containsKey(uriString)) {
+          entry.setValue(result as ResultDescriptor<SourceKind>,
+              SourceKind.PART, TargetedResult.EMPTY_LIST);
+          return true;
+        }
+        return false;
+      } else if (result == CONTAINING_LIBRARIES) {
+        List<String> libraryUriStrings =
+            _dataStore.getContainingLibraryUris(uriString);
+        if (libraryUriStrings != null) {
+          List<Source> librarySources = libraryUriStrings
+              .map((libraryUriString) =>
+                  context.sourceFactory.resolveUri(target, libraryUriString))
+              .toList(growable: false);
+          entry.setValue(result as ResultDescriptor<List<Source>>,
+              librarySources, TargetedResult.EMPTY_LIST);
+          return true;
+        }
+        return false;
+      } else if (result == LINE_INFO) {
+        UnlinkedUnit unlinkedUnit = _dataStore.unlinkedMap[uriString];
+        List<int> lineStarts = unlinkedUnit.lineStarts;
+        if (lineStarts.isNotEmpty) {
+          LineInfo lineInfo = new LineInfo(lineStarts);
+          entry.setValue(result as ResultDescriptor<LineInfo>, lineInfo,
+              TargetedResult.EMPTY_LIST);
+          return true;
+        }
+        return false;
+      }
+    } else if (target is LibrarySpecificUnit) {
+      if (result == CREATED_RESOLVED_UNIT1 ||
+          result == CREATED_RESOLVED_UNIT2 ||
+          result == CREATED_RESOLVED_UNIT3 ||
+          result == CREATED_RESOLVED_UNIT4 ||
+          result == CREATED_RESOLVED_UNIT5 ||
+          result == CREATED_RESOLVED_UNIT6 ||
+          result == CREATED_RESOLVED_UNIT7 ||
+          result == CREATED_RESOLVED_UNIT8 ||
+          result == CREATED_RESOLVED_UNIT9 ||
+          result == CREATED_RESOLVED_UNIT10 ||
+          result == CREATED_RESOLVED_UNIT11) {
+        entry.setValue(
+            result as ResultDescriptor<bool>, true, TargetedResult.EMPTY_LIST);
+        return true;
+      }
+      if (result == COMPILATION_UNIT_ELEMENT) {
+        String libraryUri = target.library.uri.toString();
+        String unitUri = target.unit.uri.toString();
+        CompilationUnitElement unit = resynthesizer.getElement(
+            new ElementLocationImpl.con3(<String>[libraryUri, unitUri]));
+        if (unit != null) {
+          entry.setValue(result as ResultDescriptor<CompilationUnitElement>,
+              unit, TargetedResult.EMPTY_LIST);
+          return true;
+        }
+      }
+    } else if (target is VariableElement) {
+      if (result == INFERRED_STATIC_VARIABLE) {
+        entry.setValue(result as ResultDescriptor<VariableElement>, target,
+            TargetedResult.EMPTY_LIST);
+        return true;
+      }
+    }
+    // Unknown target.
+    return false;
+  }
+
+  /**
+   * Create the [resynthesizer] instance.
+   *
+   * Subclasses must call this method in their constructors.
+   */
+  void createResynthesizer(
+      InternalAnalysisContext sdkContext, TypeProvider typeProvider) {
+    // Set the type provider to prevent the context from computing it.
+    context.typeProvider = typeProvider;
+    // Create a chained resynthesizer.
+    _sdkProvider = sdkContext?.resultProvider;
+    _resynthesizer = new _FileBasedSummaryResynthesizer(
+        _sdkProvider?.resynthesizer,
+        context,
+        typeProvider,
+        context.sourceFactory,
+        context.analysisOptions.strongMode,
+        _dataStore);
+  }
+
+  /**
+   * Return `true` if this result provider can provide a result for the
+   * given [source].  The provider must ensure that [addBundle] is invoked for
+   * every bundle that would be required to provide results for the [source].
+   */
+  bool hasResultsForSource(Source source);
+}
+
+/**
+ * A [SummaryDataStore] is a container for the data extracted from a set of
+ * summary package bundles.  It contains maps which can be used to find linked
+ * and unlinked summaries by URI.
+ */
+class SummaryDataStore {
+  /**
+   * List of all [PackageBundle]s.
+   */
+  final List<PackageBundle> bundles = <PackageBundle>[];
+
+  /**
+   * List of dependency information for the package bundles in this
+   * [SummaryDataStore], in a form that is ready to store in a newly generated
+   * summary.  Computing this information has nonzero cost, so it is only
+   * recorded if the [SummaryDataStore] is constructed with the argument
+   * `recordDependencies`.  Otherwise `null`.
+   */
+  final List<PackageDependencyInfoBuilder> dependencies;
+
+  /**
+   * Map from the URI of a compilation unit to the unlinked summary of that
+   * compilation unit.
+   */
+  final Map<String, UnlinkedUnit> unlinkedMap = <String, UnlinkedUnit>{};
+
+  /**
+   * Map from the URI of a library to the linked summary of that library.
+   */
+  final Map<String, LinkedLibrary> linkedMap = <String, LinkedLibrary>{};
+
+  /**
+   * Map from the URI of a library to the summary path that contained it.
+   */
+  final Map<String, String> uriToSummaryPath = <String, String>{};
+
+  /**
+   * Create a [SummaryDataStore] and populate it with the summaries in
+   * [summaryPaths].  If [recordDependencyInfo] is `true`, record
+   * [PackageDependencyInfo] for each summary, for later access via
+   * [dependencies].
+   */
+  SummaryDataStore(Iterable<String> summaryPaths,
+      {bool recordDependencyInfo: false})
+      : dependencies =
+            recordDependencyInfo ? <PackageDependencyInfoBuilder>[] : null {
+    summaryPaths.forEach(_fillMaps);
+  }
+
+  /**
+   * Add the given [bundle] loaded from the file with the given [path].
+   */
+  void addBundle(String path, PackageBundle bundle) {
+    bundles.add(bundle);
+    if (dependencies != null) {
+      Set<String> includedPackageNames = new Set<String>();
+      bool includesDartUris = false;
+      bool includesFileUris = false;
+      for (String uriString in bundle.unlinkedUnitUris) {
+        Uri uri = FastUri.parse(uriString);
+        String scheme = uri.scheme;
+        if (scheme == 'package') {
+          List<String> pathSegments = uri.pathSegments;
+          includedPackageNames.add(pathSegments.isEmpty ? '' : pathSegments[0]);
+        } else if (scheme == 'file') {
+          includesFileUris = true;
+        } else if (scheme == 'dart') {
+          includesDartUris = true;
+        }
+      }
+      dependencies.add(new PackageDependencyInfoBuilder(
+          includedPackageNames: includedPackageNames.toList()..sort(),
+          includesDartUris: includesDartUris,
+          includesFileUris: includesFileUris,
+          apiSignature: bundle.apiSignature,
+          summaryPath: path));
+    }
+    for (int i = 0; i < bundle.unlinkedUnitUris.length; i++) {
+      String uri = bundle.unlinkedUnitUris[i];
+      uriToSummaryPath[uri] = path;
+      unlinkedMap[uri] = bundle.unlinkedUnits[i];
+    }
+    for (int i = 0; i < bundle.linkedLibraryUris.length; i++) {
+      String uri = bundle.linkedLibraryUris[i];
+      linkedMap[uri] = bundle.linkedLibraries[i];
+    }
+  }
+
+  /**
+   * Return a list of absolute URIs of the libraries that contain the unit with
+   * the given [unitUriString], or `null` if no such library is in the store.
+   */
+  List<String> getContainingLibraryUris(String unitUriString) {
+    // The unit is the defining unit of a library.
+    if (linkedMap.containsKey(unitUriString)) {
+      return <String>[unitUriString];
+    }
+    // Check every unlinked unit whether it uses [unitUri] as a part.
+    List<String> libraryUriStrings = <String>[];
+    unlinkedMap.forEach((unlinkedUnitUriString, unlinkedUnit) {
+      Uri libraryUri = FastUri.parse(unlinkedUnitUriString);
+      for (String partUriString in unlinkedUnit.publicNamespace.parts) {
+        Uri partUri = FastUri.parse(partUriString);
+        String partAbsoluteUriString =
+            resolveRelativeUri(libraryUri, partUri).toString();
+        if (partAbsoluteUriString == unitUriString) {
+          libraryUriStrings.add(unlinkedUnitUriString);
+        }
+      }
+    });
+    return libraryUriStrings.isNotEmpty ? libraryUriStrings : null;
+  }
+
+  void _fillMaps(String path) {
+    io.File file = new io.File(path);
+    List<int> buffer = file.readAsBytesSync();
+    PackageBundle bundle = new PackageBundle.fromBuffer(buffer);
+    addBundle(path, bundle);
+  }
+}
+
+/**
+ * A concrete resynthesizer that serves summaries from given file paths.
+ */
+class _FileBasedSummaryResynthesizer extends SummaryResynthesizer {
+  final SummaryDataStore _dataStore;
+
+  _FileBasedSummaryResynthesizer(
+      SummaryResynthesizer parent,
+      AnalysisContext context,
+      TypeProvider typeProvider,
+      SourceFactory sourceFactory,
+      bool strongMode,
+      this._dataStore)
+      : super(parent, context, typeProvider, sourceFactory, strongMode);
+
+  @override
+  LinkedLibrary getLinkedSummary(String uri) {
+    return _dataStore.linkedMap[uri];
+  }
+
+  @override
+  UnlinkedUnit getUnlinkedSummary(String uri) {
+    return _dataStore.unlinkedMap[uri];
+  }
+
+  @override
+  bool hasLibrarySummary(String uri) {
+    LinkedLibrary linkedLibrary = _dataStore.linkedMap[uri];
+    return linkedLibrary != null && !linkedLibrary.fallbackMode;
+  }
+}
+
+/**
+ * A source that is part of a package whose summary was generated in fallback
+ * mode. This source behaves identically to a [FileSource] except that it also
+ * provides [summaryPath].
+ */
+class _InSummaryFallbackFileSource extends FileSource
+    implements InSummarySource {
+  @override
+  final String summaryPath;
+
+  _InSummaryFallbackFileSource(File file, Uri uri, this.summaryPath)
+      : super(file, uri);
+}
+
+/**
+ * A source that is part of a package whose summary was generated in fallback
+ * mode. This source behaves identically to a [FileBasedSource] except that it
+ * also provides [summaryPath].
+ */
+@deprecated
+class _InSummaryFallbackSource extends FileBasedSource
+    implements InSummarySource {
+  @override
+  final String summaryPath;
+
+  _InSummaryFallbackSource(JavaFile file, Uri uri, this.summaryPath)
+      : super(file, uri);
+}