Move LibraryUnitTarget into API.

pkg/analyzer/lib/src/task/dart.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.dart;
 
 import 'dart:collection';
 import 'dart:math' as math;
 
 import 'package:analyzer/src/generated/ast.dart';
 import 'package:analyzer/src/generated/element.dart';
 import 'package:analyzer/src/generated/engine.dart' hide AnalysisTask;
 import 'package:analyzer/src/generated/error.dart';
 import 'package:analyzer/src/generated/error_verifier.dart';
 import 'package:analyzer/src/generated/java_engine.dart';
 import 'package:analyzer/src/generated/parser.dart';
 import 'package:analyzer/src/generated/resolver.dart';
 import 'package:analyzer/src/generated/scanner.dart';
 import 'package:analyzer/src/generated/sdk.dart';
 import 'package:analyzer/src/generated/source.dart';
-import 'package:analyzer/src/generated/utilities_general.dart';
 import 'package:analyzer/src/task/driver.dart';
 import 'package:analyzer/src/task/general.dart';
 import 'package:analyzer/task/dart.dart';
 import 'package:analyzer/task/general.dart';
 import 'package:analyzer/task/model.dart';
 
 /**
  * The errors produced while resolving a library directives.
  *
  * The list will be empty if there were no errors, but will not be `null`.
@@ skipping 23 matching lines @@
  * The list will be empty if there were no errors, but will not be `null`.
  *
  * The result is only available for targets representing a Dart library.
  */
 final ResultDescriptor<List<AnalysisError>> BUILD_LIBRARY_ERRORS =
     new ResultDescriptor<List<AnalysisError>>(
         'BUILD_LIBRARY_ERRORS', AnalysisError.NO_ERRORS,
         contributesTo: DART_ERRORS);
 
 /**
- * The [ClassElement]s of a [LibraryUnitTarget].
+ * The [ClassElement]s of a [LibrarySpecificUnit].
  */
 final ListResultDescriptor<ClassElement> CLASS_ELEMENTS =
     new ListResultDescriptor<ClassElement>('CLASS_ELEMENTS', null);
 
 /**
  * The element model associated with a single compilation unit.
  *
  * The result is only available for targets representing a Dart compilation unit.
  */
 final ResultDescriptor<CompilationUnitElement> COMPILATION_UNIT_ELEMENT =
@@ skipping 198 matching lines @@
     new ResultDescriptor<List<AnalysisError>>(
         'SCAN_ERRORS', AnalysisError.NO_ERRORS, contributesTo: DART_ERRORS);
 
 /**
  * The [TypeProvider] of the context.
  */
 final ResultDescriptor<TypeProvider> TYPE_PROVIDER =
     new ResultDescriptor<TypeProvider>('TYPE_PROVIDER', null);
 
 /**
- * The [UsedImportedElements] of a [LibraryUnitTarget].
+ * The [UsedImportedElements] of a [LibrarySpecificUnit].
  */
 final ResultDescriptor<UsedImportedElements> USED_IMPORTED_ELEMENTS =
     new ResultDescriptor<UsedImportedElements>('USED_IMPORTED_ELEMENTS', null);
 
 /**
- * The [UsedLocalElements] of a [LibraryUnitTarget].
+ * The [UsedLocalElements] of a [LibrarySpecificUnit].
  */
 final ResultDescriptor<UsedLocalElements> USED_LOCAL_ELEMENTS =
     new ResultDescriptor<UsedLocalElements>('USED_LOCAL_ELEMENTS', null);
 
 /**
  * The errors produced while verifying a compilation unit.
  *
  * The list will be empty if there were no errors, but will not be `null`.
  *
  * The result is only available for targets representing a Dart compilation unit.
@@ skipping 278 matching lines @@
     outputs[CLASS_ELEMENTS] = element.types;
     outputs[COMPILATION_UNIT_ELEMENT] = element;
     outputs[RESOLVED_UNIT1] = unit;
   }
 
   /**
    * Return a map from the names of the inputs of this kind of task to the task
    * input descriptors describing those inputs for a task with the given
    * [target].
    */
-  static Map<String, TaskInput> buildInputs(LibraryUnitTarget target) {
+  static Map<String, TaskInput> buildInputs(LibrarySpecificUnit target) {
     return <String, TaskInput>{
       PARSED_UNIT_INPUT_NAME: PARSED_UNIT.of(target.unit)
     };
   }
 
   /**
    * Create a [BuildCompilationUnitElementTask] based on the given [target] in
    * the given [context].
    */
   static BuildCompilationUnitElementTask createTask(
@@ skipping 181 matching lines @@
 
   /**
    * Return a map from the names of the inputs of this kind of task to the task
    * input descriptors describing those inputs for a task with the
    * given library [libSource].
    */
   static Map<String, TaskInput> buildInputs(Source libSource) {
     return <String, TaskInput>{
       'defining_LIBRARY_ELEMENT1': LIBRARY_ELEMENT1.of(libSource),
       UNIT_INPUT_NAME:
-          RESOLVED_UNIT1.of(new LibraryUnitTarget(libSource, libSource)),
+          RESOLVED_UNIT1.of(new LibrarySpecificUnit(libSource, libSource)),
       IMPORTS_LIBRARY_ELEMENT_INPUT_NAME:
           IMPORTED_LIBRARIES.of(libSource).toMapOf(LIBRARY_ELEMENT1),
       EXPORTS_LIBRARY_ELEMENT_INPUT_NAME:
           EXPORTED_LIBRARIES.of(libSource).toMapOf(LIBRARY_ELEMENT1),
       IMPORTS_SOURCE_KIND_INPUT_NAME:
           IMPORTED_LIBRARIES.of(libSource).toMapOf(SOURCE_KIND),
       EXPORTS_SOURCE_KIND_INPUT_NAME:
           EXPORTED_LIBRARIES.of(libSource).toMapOf(SOURCE_KIND)
     };
   }
@@ skipping 80 matching lines @@
     EnumMemberBuilder builder = new EnumMemberBuilder(typeProvider);
     unit.accept(builder);
     outputs[RESOLVED_UNIT2] = unit;
   }
 
   /**
    * Return a map from the names of the inputs of this kind of task to the task
    * input descriptors describing those inputs for a task with the
    * given [target].
    */
-  static Map<String, TaskInput> buildInputs(LibraryUnitTarget target) {
+  static Map<String, TaskInput> buildInputs(LibrarySpecificUnit target) {
     return <String, TaskInput>{
       TYPE_PROVIDER_INPUT: TYPE_PROVIDER.of(AnalysisContextTarget.request),
       UNIT_INPUT: RESOLVED_UNIT1.of(target)
     };
   }
 
   /**
    * Create a [BuildEnumMemberElementsTask] based on the given [target] in
    * the given [context].
    */
@@ skipping 131 matching lines @@
     //
     outputs[BUILD_FUNCTION_TYPE_ALIASES_ERRORS] = errorListener.errors;
     outputs[RESOLVED_UNIT3] = unit;
   }
 
   /**
    * Return a map from the names of the inputs of this kind of task to the task
    * input descriptors describing those inputs for a task with the
    * given [target].
    */
-  static Map<String, TaskInput> buildInputs(LibraryUnitTarget target) {
+  static Map<String, TaskInput> buildInputs(LibrarySpecificUnit target) {
     return <String, TaskInput>{
       TYPE_PROVIDER_INPUT: TYPE_PROVIDER.of(AnalysisContextTarget.request),
       'importsExportNamespace':
           IMPORTED_LIBRARIES.of(target.library).toMapOf(LIBRARY_ELEMENT4),
       LIBRARY_INPUT: LIBRARY_ELEMENT4.of(target.library),
       UNIT_INPUT: RESOLVED_UNIT2.of(target)
     };
   }
 
   /**
@@ skipping 302 matching lines @@
   }
 
   /**
    * Return a map from the names of the inputs of this kind of task to the task
    * input descriptors describing those inputs for a task with the given
    * [libSource].
    */
   static Map<String, TaskInput> buildInputs(Source libSource) {
     return <String, TaskInput>{
       DEFINING_UNIT_INPUT:
-          RESOLVED_UNIT1.of(new LibraryUnitTarget(libSource, libSource)),
+          RESOLVED_UNIT1.of(new LibrarySpecificUnit(libSource, libSource)),
       PARTS_UNIT_INPUT: INCLUDED_PARTS.of(libSource).toList((Source unit) {
-        LibraryUnitTarget lut = new LibraryUnitTarget(libSource, unit);
-        return RESOLVED_UNIT1.of(lut);
+        return RESOLVED_UNIT1.of(new LibrarySpecificUnit(libSource, unit));
       })
     };
   }
 
   /**
    * Create a [BuildLibraryElementTask] based on the given [target] in the
    * given [context].
    */
   static BuildLibraryElementTask createTask(
       AnalysisContext context, AnalysisTarget target) {
@@ skipping 321 matching lines @@
     // Record outputs.
     //
     outputs[USED_IMPORTED_ELEMENTS] = visitor.usedElements;
   }
 
   /**
    * Return a map from the names of the inputs of this kind of task to the task
    * input descriptors describing those inputs for a task with the
    * given [target].
    */
-  static Map<String, TaskInput> buildInputs(LibraryUnitTarget target) {
+  static Map<String, TaskInput> buildInputs(LibrarySpecificUnit target) {
     return <String, TaskInput>{UNIT_INPUT: RESOLVED_UNIT.of(target)};
   }
 
   /**
    * Create a [GatherUsedImportedElementsTask] based on the given [target] in
    * the given [context].
    */
   static GatherUsedImportedElementsTask createTask(
-      AnalysisContext context, LibraryUnitTarget target) {
+      AnalysisContext context, LibrarySpecificUnit target) {
     return new GatherUsedImportedElementsTask(context, target);
   }
 }
 
 /**
  * A task that builds [USED_LOCAL_ELEMENTS] for a unit.
  */
 class GatherUsedLocalElementsTask extends SourceBasedAnalysisTask {
   /**
    * The name of the [RESOLVED_UNIT] input.
@@ skipping 29 matching lines @@
     // Record outputs.
     //
     outputs[USED_LOCAL_ELEMENTS] = visitor.usedElements;
   }
 
   /**
    * Return a map from the names of the inputs of this kind of task to the task
    * input descriptors describing those inputs for a task with the
    * given [target].
    */
-  static Map<String, TaskInput> buildInputs(LibraryUnitTarget target) {
+  static Map<String, TaskInput> buildInputs(LibrarySpecificUnit target) {
     return <String, TaskInput>{UNIT_INPUT: RESOLVED_UNIT.of(target)};
   }
 
   /**
    * Create a [GatherUsedLocalElementsTask] based on the given [target] in
    * the given [context].
    */
   static GatherUsedLocalElementsTask createTask(
-      AnalysisContext context, LibraryUnitTarget target) {
+      AnalysisContext context, LibrarySpecificUnit target) {
     return new GatherUsedLocalElementsTask(context, target);
   }
 }
 
 /**
  * A task that generates [HINTS] for a unit.
  */
 class GenerateHintsTask extends SourceBasedAnalysisTask {
   /**
    * The name of the [RESOLVED_UNIT] input.
@@ skipping 73 matching lines @@
     // Record outputs.
     //
     outputs[HINTS] = errorListener.errors;
   }
 
   /**
    * Return a map from the names of the inputs of this kind of task to the task
    * input descriptors describing those inputs for a task with the
    * given [target].
    */
-  static Map<String, TaskInput> buildInputs(LibraryUnitTarget target) {
+  static Map<String, TaskInput> buildInputs(LibrarySpecificUnit target) {
     Source libSource = target.library;
     return <String, TaskInput>{
       UNIT_INPUT: RESOLVED_UNIT.of(target),
       USED_LOCAL_ELEMENTS_INPUT: UNITS.of(libSource).toList((unit) {
-        LibraryUnitTarget target = new LibraryUnitTarget(libSource, unit);
+        LibrarySpecificUnit target = new LibrarySpecificUnit(libSource, unit);
         return USED_LOCAL_ELEMENTS.of(target);
       }),
       USED_IMPORTED_ELEMENTS_INPUT: UNITS.of(libSource).toList((unit) {
-        LibraryUnitTarget target = new LibraryUnitTarget(libSource, unit);
+        LibrarySpecificUnit target = new LibrarySpecificUnit(libSource, unit);
         return USED_IMPORTED_ELEMENTS.of(target);
       })
     };
   }
 
   /**
    * Create a [GenerateHintsTask] based on the given [target] in
    * the given [context].
    */
   static GenerateHintsTask createTask(
       AnalysisContext context, AnalysisTarget target) {
     return new GenerateHintsTask(context, target);
   }
 }
 
 /**
- * A pair of a library [Source] and a unit [Source] in this library.
- */
-class LibraryUnitTarget implements AnalysisTarget {
-  final Source library;
-  final Source unit;
-
-  LibraryUnitTarget(this.library, this.unit);
-
-  @override
-  int get hashCode {
-    return JenkinsSmiHash.combine(library.hashCode, unit.hashCode);
-  }
-
-  @override
-  Source get source => unit;
-
-  @override
-  bool operator ==(other) {
-    return other is LibraryUnitTarget &&
-        other.library == library &&
-        other.unit == unit;
-  }
-}
-
-/**
  * A task that parses the content of a Dart file, producing an AST structure.
  */
 class ParseDartTask extends SourceBasedAnalysisTask {
   /**
    * The name of the input whose value is the line information produced for the
    * file.
    */
   static const String LINE_INFO_INPUT_NAME = 'LINE_INFO_INPUT_NAME';
 
   /**
@@ skipping 229 matching lines @@
    * input descriptors describing those inputs for a task with the
    * given [target].
    */
   static Map<String, TaskInput> buildInputs(Source libSource) {
     return <String, TaskInput>{
       LIBRARY_INPUT: LIBRARY_ELEMENT4.of(libSource),
       'resolvedUnits': IMPORT_SOURCE_CLOSURE
           .of(libSource)
           .toMapOf(UNITS)
           .toFlattenList((Source library, Source unit) =>
-              RESOLVED_UNIT4.of(new LibraryUnitTarget(library, unit)))
+              RESOLVED_UNIT4.of(new LibrarySpecificUnit(library, unit)))
     };
   }
 
   /**
    * Create a [ResolveLibraryTypeNamesTask] based on the given [target] in
    * the given [context].
    */
   static ResolveLibraryTypeNamesTask createTask(
       AnalysisContext context, AnalysisTarget target) {
     return new ResolveLibraryTypeNamesTask(context, target);
@@ skipping 50 matching lines @@
     //
     outputs[RESOLVE_REFERENCES_ERRORS] = errorListener.errors;
     outputs[RESOLVED_UNIT] = unit;
   }
 
   /**
    * Return a map from the names of the inputs of this kind of task to the task
    * input descriptors describing those inputs for a task with the
    * given [target].
    */
-  static Map<String, TaskInput> buildInputs(LibraryUnitTarget target) {
+  static Map<String, TaskInput> buildInputs(LibrarySpecificUnit target) {
     return <String, TaskInput>{
       LIBRARY_INPUT: LIBRARY_ELEMENT.of(target.library),
       UNIT_INPUT: RESOLVED_UNIT5.of(target)
     };
   }
 
   /**
    * Create a [ResolveReferencesTask] based on the given [target] in
    * the given [context].
    */
@@ skipping 48 matching lines @@
     //
     outputs[RESOLVE_TYPE_NAMES_ERRORS] = errorListener.errors;
     outputs[RESOLVED_UNIT4] = unit;
   }
 
   /**
    * Return a map from the names of the inputs of this kind of task to the task
    * input descriptors describing those inputs for a task with the
    * given [target].
    */
-  static Map<String, TaskInput> buildInputs(LibraryUnitTarget target) {
+  static Map<String, TaskInput> buildInputs(LibrarySpecificUnit target) {
     return <String, TaskInput>{UNIT_INPUT: RESOLVED_UNIT3.of(target)};
   }
 
   /**
    * Create a [ResolveUnitTypeNamesTask] based on the given [target] in
    * the given [context].
    */
   static ResolveUnitTypeNamesTask createTask(
       AnalysisContext context, AnalysisTarget target) {
     return new ResolveUnitTypeNamesTask(context, target);
@@ skipping 49 matching lines @@
     // Record outputs.
     //
     outputs[RESOLVED_UNIT5] = unit;
   }
 
   /**
    * Return a map from the names of the inputs of this kind of task to the task
    * input descriptors describing those inputs for a task with the
    * given [target].
    */
-  static Map<String, TaskInput> buildInputs(LibraryUnitTarget target) {
+  static Map<String, TaskInput> buildInputs(LibrarySpecificUnit target) {
     return <String, TaskInput>{
       LIBRARY_INPUT: LIBRARY_ELEMENT.of(target.library),
       UNIT_INPUT: RESOLVED_UNIT4.of(target)
     };
   }
 
   /**
    * Create a [ResolveVariableReferencesTask] based on the given [target] in
    * the given [context].
    */
@@ skipping 114 matching lines @@
     // Record outputs.
     //
     outputs[VERIFY_ERRORS] = errorListener.errors;
   }
 
   /**
    * Return a map from the names of the inputs of this kind of task to the task
    * input descriptors describing those inputs for a task with the
    * given [target].
    */
-  static Map<String, TaskInput> buildInputs(LibraryUnitTarget target) {
+  static Map<String, TaskInput> buildInputs(LibrarySpecificUnit target) {
     return <String, TaskInput>{UNIT_INPUT: RESOLVED_UNIT.of(target)};
   }
 
   /**
    * Create a [VerifyUnitTask] based on the given [target] in
    * the given [context].
    */
   static VerifyUnitTask createTask(
       AnalysisContext context, AnalysisTarget target) {
     return new VerifyUnitTask(context, target);
@@ skipping 75 matching lines @@
   @override
   bool moveNext() {
     if (_newSources.isEmpty) {
       return false;
     }
     currentTarget = _newSources.first;
     _newSources.remove(currentTarget);
     return true;
   }
 }