Delete proxy and total samples, which have bit-rotted.

samples/total/client/Value.dart

-// Copyright (c) 2011, 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.
-
-/**
- * A dynamically-typed value that may appear as the result or intermediate value of a spreadsheet
- * computation.
- */
-class Value {
-  static final int TYPE_UNKNOWN = -1;
-  static final int TYPE_BOOLEAN = 1;
-  static final int TYPE_CELLREF = 2;
-  static final int TYPE_DATE = 3;
-  static final int TYPE_DATE_TIME = 4;
-  static final int TYPE_DOUBLE = 5;
-  static final int TYPE_RANGE = 6;
-  static final int TYPE_STRING = 7;
-  static final int TYPE_TIME = 8;
-
-  static String getDatatypeAsString(int datatype) {
-    switch (datatype) {
-    case Value.TYPE_DOUBLE:
-      return "double";
-    case Value.TYPE_DATE:
-      return "date";
-    case Value.TYPE_TIME:
-      return "time";
-    case Value.TYPE_DATE_TIME:
-      return "date_time";
-    case Value.TYPE_STRING:
-      return "string";
-    case Value.TYPE_BOOLEAN:
-      return "boolean";
-    default:
-      return "unknown";
-    }
-  }
-
-  int _datatype;
-
-  /**
-   * Returns the datatype of this [Value], one of [TYPE_BOOLEAN], [TYPE_CELLREF], [TYPE_DOUBLE],
-   * [TYPE_RANGE], [TYPE_STRING], [TYPE_DATE], [TYPE_TIME], or [TYPE_DATE_TIME].  If the datatype
-   * is unknown, [TYPE_UNKNOWN] is returned.
-   */
-  int get datatype() => _datatype;
-
-  Value(this._datatype) { }
-
-  /**
-   * Return the value as a boolean.  For numeric values, 0 equates to [:false:] and all other
-   * values equate to [:true:].
-   */
-  bool asBoolean(CellLocation location) => asDouble(location) != 0.0;
-
-  /**
-   * Returns a [CellRefToken] from this [Value].  If this [Value] is not a [RefValue],
-   * an exception is thrown.
-   */
-  CellRefToken asCellRefToken() {
-    throw new RuntimeException("Expected CellRefToken");
-  }
-
-  /**
-   * Returns a double from this [Value].  If this [Value] is a [RefValue], get the computed
-   * value from the spreadsheet, interpreting the reference relative to the given
-   * (sheet, row, col) [location].  Otherwise, [location] is ignored ([:null:] is an
-   * acceptable value).
-   */
-  abstract double asDouble(CellLocation location);
-
-  RangeToken asRangeToken() {
-    throw new RuntimeException("Expected RangeToken");
-  }
-
-  /**
-   * Returns a [String] from this [Value].  If this [Value] is a [RefValue], get the computed
-   * value from the spreadsheet, interpreting the reference relative to the given
-   * (sheet, row, col) [location].  Otherwise, [location] is ignored ([:null:] is an
-   * acceptable value).
-   *
-   * For numeric values, this method will throw an exception.
-   */
-  String asString(CellLocation location) {
-    throw new RuntimeException("Expected String");
-  }
-
-  /**
-   * Returns [:true:] if this [Value] is a string.  If this [Value] is a [RefValue], the reference
-   * is evaluated relative to the given (sheet, row, col) [location].
-   *
-   * The implementation in this superclass returns [:false:].
-   */
-  bool isString(CellLocation location) => false;
-
-  /**
-   * For reference values, the reference is evaluated relative to the given (sheet, row, col)
-   * [location]. For non-reference [Value]s, [lookup] returns the value itself.
-   */
-  Value lookup(CellLocation location) => this;
-
-  /**
-   * Returns a String representation of this [Value] for debugging.  The return value is not
-   * intended to be part of the application's user-facing UI.
-   */
-  abstract String toString();
-}
-
-/**
- * Superclass for all values other than strings and references.
- */
-class NumericValue extends Value {
-  double _value;
-
-  double get value() => _value;
-
-  NumericValue(this._value, int datatype) : super(datatype) { }
-
-  double asDouble(CellLocation location) => _value;
-
-  String toString() => "NumericValue[${value}]";
-}
-
-class BooleanValue extends NumericValue {
-
-  BooleanValue(bool b) : super(b ? 1.0 : 0.0, Value.TYPE_BOOLEAN) { }
-
-  bool asBoolean(CellLocation location) => value != 0.0;
-
-  String toString() => "BooleanValue[${value == 0.0 ? "FALSE" : "TRUE"}]";
-}
-
-class DateValue extends NumericValue {
-
-  DateValue(double date) : super(date, Value.TYPE_DATE) { }
-
-  String toString() => "DateValue[${value}]";
-}
-
-class DateTimeValue extends NumericValue {
-
-  DateTimeValue(double dateTime) : super(dateTime, Value.TYPE_DATE_TIME) { }
-
-  String toString() => "DateTimeValue[${value}]";
-}
-
-class DoubleValue extends NumericValue {
-
-  DoubleValue(double value) : super(value, Value.TYPE_DOUBLE) { }
-
-  String toString() => "DoubleValue[${value}]";
-}
-
-class TimeValue extends NumericValue {
-
-  TimeValue(double time) : super(time, Value.TYPE_TIME) { }
-
-  String toString() => "TimeValue[${value}]";
-}
-
-class StringValue extends Value {
-  String _s;
-
-  StringValue(this._s) : super(Value.TYPE_STRING) { }
-
-  // Strings are interpreted as 0.0 when used as inputs to a numeric computation
-  double asDouble(CellLocation location) => 0.0;
-
-  String asString(CellLocation location) => _s;
-
-  bool isString(CellLocation location) => true;
-
-  String toString() => "StringValue[${_s}]";
-}
-
-class RefValue extends Value {
-
-  RefValue(int datatype) : super(datatype) { }
-
-  double asDouble(CellLocation location) => lookup(location).asDouble(null);
-
-  String asString(CellLocation location) => lookup(location).asString(null);
-
-  bool isString(CellLocation location) => lookup(location).isString(null);
-
-  /**
-   * Returns the value stored at the location specified by this value's underlying reference
-   * (i.e., the reference obtained by calling [asCellRefToken]), relative to a given [CellLocation].
-   */
-  Value lookup(CellLocation location) {
-    if (location == null) {
-      throw new RuntimeException("Attempt to retrieve primitive value from ref");
-    }
-    CellLocation refLocation = asCellRefToken().getCellLocation(location);
-    if (!refLocation.isValidCell()) {
-      throw new RefException();
-    }
-    return refLocation.spreadsheet.getValue(refLocation.rowCol);
-  }
-}
-
-class CellRefTokenValue extends RefValue {
-  CellRefToken _crt;
-
-  CellRefTokenValue(this._crt) : super(Value.TYPE_CELLREF) { }
-
-  CellRefToken asCellRefToken() => _crt;
-
-  RangeToken asRangeToken() {
-    // Create a range consisting of a single cell
-    return new RangeToken(_crt, _crt);
-  }
-
-  String toString() => "CellRefTokenValue[${_crt.toDebugString()}]";
-}
-
-class RangeTokenValue extends RefValue {
-  RangeToken _rt;
-
-  RangeTokenValue(this._rt) : super(Value.TYPE_RANGE) {}
-
-  CellRefToken asCellRefToken() => _rt.startRef;
-
-  RangeToken asRangeToken() => _rt;
-
-  String toString() => "RangeTokenValue[${_rt.toDebugString()}]";
-}