Remove old index and search implementations.

pkg/analysis_server/lib/src/services/index/store/codec.dart

-// 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.
-
-library services.src.index.store.codec;
-
-import 'dart:collection';
-
-import 'package:analysis_server/src/provisional/index/index_core.dart';
-import 'package:analysis_server/src/services/index/index.dart';
-import 'package:analyzer/src/generated/engine.dart';
-
-/**
- * A helper that encodes/decodes [AnalysisContext]s from/to integers.
- */
-class ContextCodec {
-  /**
-   * A table mapping contexts to their unique indices.
-   */
-  Map<AnalysisContext, int> _contextToIndex =
-      new HashMap<AnalysisContext, int>();
-
-  /**
-   * A table mapping indices to the corresponding contexts.
-   */
-  Map<int, AnalysisContext> _indexToContext =
-      new HashMap<int, AnalysisContext>();
-
-  /**
-   * The next id to assign.
-   */
-  int _nextId = 0;
-
-  /**
-   * Returns the [AnalysisContext] that corresponds to the given index.
-   */
-  AnalysisContext decode(int index) => _indexToContext[index];
-
-  /**
-   * Returns an unique index for the given [AnalysisContext].
-   */
-  int encode(AnalysisContext context) {
-    int index = _contextToIndex[context];
-    if (index == null) {
-      index = _nextId++;
-      _contextToIndex[context] = index;
-      _indexToContext[index] = context;
-    }
-    return index;
-  }
-
-  /**
-   * Removes the given [context].
-   */
-  void remove(AnalysisContext context) {
-    int id = _contextToIndex.remove(context);
-    if (id != null) {
-      _indexToContext.remove(id);
-    }
-  }
-}
-
-/**
- * A helper that encodes/decodes [IndexableObject]s to/from integers.
- */
-class ElementCodec {
-  // TODO(brianwilkerson) Rename this class now that if encodes indexable
-  // objects rather than elements.
-  final StringCodec _stringCodec;
-
-  ElementCodec(this._stringCodec);
-
-  /**
-   * Returns an [IndexableObject] that corresponds to the given identifiers.
-   */
-  IndexableObject decode(
-      AnalysisContext context, int fileId, int offset, int kindId) {
-    IndexableObjectKind kind = IndexableObjectKind.getKind(kindId);
-    if (kind == null) {
-      return null;
-    } else if (kind is IndexableNameKind) {
-      String name = _stringCodec.decode(offset);
-      return new IndexableName(name);
-    }
-    String filePath = _stringCodec.decode(fileId);
-    return kind.decode(context, filePath, offset);
-  }
-
-  /**
-   * Returns the first component of the [indexable] id.
-   * In the most cases it is an encoding of the [indexable]'s file path.
-   * If the given [indexable] is not defined in a file, returns `-1`.
-   */
-  int encode1(IndexableObject indexable) {
-    String filePath = indexable.filePath;
-    if (filePath == null) {
-      return -1;
-    }
-    return _stringCodec.encode(filePath);
-  }
-
-  /**
-   * Returns the second component of the [indexable] id.
-   * In the most cases it is the [indexable]'s name offset.
-   */
-  int encode2(IndexableObject indexable) {
-    if (indexable is IndexableName) {
-      String name = indexable.name;
-      return _stringCodec.encode(name);
-    }
-    return indexable.offset;
-  }
-
-  /**
-   * Returns the third component of the [indexable] id.
-   * In the most cases it is the [indexable]'s kind.
-   */
-  int encode3(IndexableObject indexable) {
-    return indexable.kind.index;
-  }
-
-  /**
-   * Returns an integer that corresponds to the name of [indexable].
-   */
-  int encodeHash(IndexableObject indexable) {
-    return indexable.kind.encodeHash(_stringCodec.encode, indexable);
-  }
-}
-
-/**
- * A helper that encodes/decodes [Relationship]s to/from integers.
- */
-class RelationshipCodec {
-  final StringCodec _stringCodec;
-
-  RelationshipCodec(this._stringCodec);
-
-  RelationshipImpl decode(int idIndex) {
-    String id = _stringCodec.decode(idIndex);
-    return RelationshipImpl.getRelationship(id);
-  }
-
-  int encode(RelationshipImpl relationship) {
-    String id = relationship.identifier;
-    return _stringCodec.encode(id);
-  }
-}
-
-/**
- * A helper that encodes/decodes [String]s from/to integers.
- */
-class StringCodec {
-  /**
-   * A table mapping names to their unique indices.
-   */
-  final Map<String, int> nameToIndex = new HashMap<String, int>();
-
-  /**
-   * A table mapping indices to the corresponding strings.
-   */
-  final List<String> _indexToName = <String>[];
-
-  /**
-   * Returns the [String] that corresponds to the given index.
-   */
-  String decode(int index) => _indexToName[index];
-
-  /**
-   * Returns an unique index for the given [String].
-   */
-  int encode(String name) {
-    int index = nameToIndex[name];
-    if (index == null) {
-      index = _indexToName.length;
-      nameToIndex[name] = index;
-      _indexToName.add(name);
-    }
-    return index;
-  }
-}