/// <summary>
/// Creates an AnyNode or an AllNode from the given
/// </summary>
/// <param name="state">State of binding.</param>
/// <param name="parent">Parent node to the lambda.</param>
/// <param name="lambdaExpression">Bound Lambda expression.</param>
/// <param name="newRangeVariable">The new range variable being added by this lambda node.</param>
/// <param name="queryTokenKind">Token kind.</param>
/// <returns>A new LambdaNode bound to metadata.</returns>
internal static LambdaNode CreateLambdaNode(
BindingState state,
CollectionNode parent,
SingleValueNode lambdaExpression,
RangeVariable newRangeVariable,
QueryTokenKind queryTokenKind)
{
LambdaNode lambdaNode;
if (queryTokenKind == QueryTokenKind.Any)
{
lambdaNode = new AnyNode(new Collection <RangeVariable>(state.RangeVariables.ToList()), newRangeVariable)
{
Body = lambdaExpression,
Source = parent,
};
}
else
{
Debug.Assert(queryTokenKind == QueryTokenKind.All, "LambdaQueryNodes must be Any or All only.");
lambdaNode = new AllNode(new Collection <RangeVariable>(state.RangeVariables.ToList()), newRangeVariable)
{
Body = lambdaExpression,
Source = parent,
};
}
return(lambdaNode);
}
private void ValidateToken(QueryTokenKind tokenKind, Func <string> errorString)
{
if (this.lexer.Token.Kind != tokenKind)
{
this.ParseError(errorString(), this.lexer.Token.Position);
}
}
private QueryNode ParseMultiplicative()
{
QueryNode left = this.ParseUnary();
while (this.lexer.Token.Kind == QueryTokenKind.Multiply ||
this.lexer.Token.Kind == QueryTokenKind.Divide ||
this.lexer.Token.Kind == QueryTokenKind.Modulo)
{
QueryTokenKind opKind = this.lexer.Token.Kind;
this.lexer.NextToken();
var right = this.ParseUnary();
switch (opKind)
{
case QueryTokenKind.Multiply:
left = new BinaryOperatorNode(BinaryOperatorKind.Multiply, left, right);
break;
case QueryTokenKind.Divide:
left = new BinaryOperatorNode(BinaryOperatorKind.Divide, left, right);
break;
case QueryTokenKind.Modulo:
left = new BinaryOperatorNode(BinaryOperatorKind.Modulo, left, right);
break;
}
}
return(left);
}
private QueryNode ParseUnary()
{
if (this.lexer.Token.Kind == QueryTokenKind.Minus ||
this.lexer.Token.Kind == QueryTokenKind.Not)
{
QueryTokenKind opKind = this.lexer.Token.Kind;
int opPos = this.lexer.Token.Position;
this.lexer.NextToken();
if (opKind == QueryTokenKind.Minus &&
(this.lexer.Token.Kind == QueryTokenKind.IntegerLiteral ||
this.lexer.Token.Kind == QueryTokenKind.RealLiteral))
{
this.lexer.Token.Text = "-" + this.lexer.Token.Text;
this.lexer.Token.Position = opPos;
return(this.ParsePrimary());
}
QueryNode expr = this.ParseUnary();
if (opKind == QueryTokenKind.Minus)
{
expr = new UnaryOperatorNode(UnaryOperatorKind.Negate, expr);
}
else
{
expr = new UnaryOperatorNode(UnaryOperatorKind.Not, expr);
}
return(expr);
}
return(this.ParsePrimary());
}
private QueryNode ParseComparison()
{
QueryNode left = this.ParseAdditive();
while (this.lexer.Token.Kind == QueryTokenKind.Equal ||
this.lexer.Token.Kind == QueryTokenKind.NotEqual ||
this.lexer.Token.Kind == QueryTokenKind.GreaterThan ||
this.lexer.Token.Kind == QueryTokenKind.GreaterThanEqual ||
this.lexer.Token.Kind == QueryTokenKind.LessThan ||
this.lexer.Token.Kind == QueryTokenKind.LessThanEqual)
{
QueryTokenKind opKind = this.lexer.Token.Kind;
this.lexer.NextToken();
QueryNode right = this.ParseAdditive();
switch (opKind)
{
case QueryTokenKind.Equal:
left = new BinaryOperatorNode(BinaryOperatorKind.Equal, left, right);
break;
case QueryTokenKind.NotEqual:
left = new BinaryOperatorNode(BinaryOperatorKind.NotEqual, left, right);
break;
case QueryTokenKind.GreaterThan:
left = new BinaryOperatorNode(BinaryOperatorKind.GreaterThan, left, right);
break;
case QueryTokenKind.GreaterThanEqual:
left = new BinaryOperatorNode(BinaryOperatorKind.GreaterThanOrEqual, left, right);
break;
case QueryTokenKind.LessThan:
left = new BinaryOperatorNode(BinaryOperatorKind.LessThan, left, right);
break;
case QueryTokenKind.LessThanEqual:
left = new BinaryOperatorNode(BinaryOperatorKind.LessThanOrEqual, left, right);
break;
}
}
return(left);
}
private QueryNode ParseAdditive()
{
QueryNode left = this.ParseMultiplicative();
while (this.lexer.Token.Kind == QueryTokenKind.Add || this.lexer.Token.Kind == QueryTokenKind.Sub)
{
QueryTokenKind opKind = this.lexer.Token.Kind;
this.lexer.NextToken();
QueryNode right = this.ParseMultiplicative();
switch (opKind)
{
case QueryTokenKind.Add:
left = new BinaryOperatorNode(BinaryOperatorKind.And, left, right);
break;
case QueryTokenKind.Sub:
left = new BinaryOperatorNode(BinaryOperatorKind.Subtract, left, right);
break;
}
}
return(left);
}
private void ValidateToken(QueryTokenKind tokenKind, Func<string> errorString)
{
if (this.lexer.Token.Kind != tokenKind)
{
this.ParseError(errorString(), this.lexer.Token.Position);
}
}
public QueryToken NextToken()
{
while (Char.IsWhiteSpace(this.CurrentChar))
{
this.NextChar();
}
QueryTokenKind t = QueryTokenKind.Unknown;
int tokenPos = this.textPos;
switch (this.CurrentChar)
{
case '(':
this.NextChar();
t = QueryTokenKind.OpenParen;
break;
case ')':
this.NextChar();
t = QueryTokenKind.CloseParen;
break;
case ',':
this.NextChar();
t = QueryTokenKind.Comma;
break;
case '-':
this.NextChar();
t = QueryTokenKind.Minus;
break;
case '/':
this.NextChar();
t = QueryTokenKind.Dot;
break;
case '\'':
char quote = this.CurrentChar;
do
{
this.AdvanceToNextOccuranceOf(quote);
if (this.textPos == this.textLen)
{
this.ParseError("The specified odata query has unterminated string literal.", this.textPos);
}
this.NextChar();
}while (this.CurrentChar == quote);
t = QueryTokenKind.StringLiteral;
break;
default:
if (this.IsIdentifierStart(this.CurrentChar) || this.CurrentChar == '@' || this.CurrentChar == '_')
{
do
{
this.NextChar();
}while (this.IsIdentifierPart(this.CurrentChar) || this.CurrentChar == '_');
t = QueryTokenKind.Identifier;
break;
}
if (Char.IsDigit(this.CurrentChar))
{
t = QueryTokenKind.IntegerLiteral;
do
{
this.NextChar();
}while (Char.IsDigit(this.CurrentChar));
if (this.CurrentChar == '.')
{
t = QueryTokenKind.RealLiteral;
this.NextChar();
this.ValidateDigit();
do
{
this.NextChar();
}while (Char.IsDigit(this.CurrentChar));
}
if (this.CurrentChar == 'E' || this.CurrentChar == 'e')
{
t = QueryTokenKind.RealLiteral;
this.NextChar();
if (this.CurrentChar == '+' || this.CurrentChar == '-')
{
this.NextChar();
}
this.ValidateDigit();
do
{
this.NextChar();
}while (Char.IsDigit(this.CurrentChar));
}
if (this.CurrentChar == 'F' || this.CurrentChar == 'f' || this.CurrentChar == 'M' || this.CurrentChar == 'm' || this.CurrentChar == 'D' || this.CurrentChar == 'd')
{
t = QueryTokenKind.RealLiteral;
this.NextChar();
}
break;
}
if (this.textPos == this.textLen)
{
t = QueryTokenKind.End;
break;
}
this.ParseError("The specified odata query has syntax errors.", this.textPos);
break;
}
this.Token.Kind = t;
this.Token.Text = this.text.Substring(tokenPos, this.textPos - tokenPos);
this.Token.Position = tokenPos;
this.ReClassifyToken();
return(this.Token);
}
/// <summary>
/// Converts a <see cref="QueryTokenKind"/> to a <see cref="BinaryOperatorKind"/> where possible.
/// </summary>
/// <param name="kind">The <see cref="QueryTokenKind"/> to convert</param>
/// <returns>The <see cref="BinaryOperatorKind"/> that is equivalent</returns>
/// <exception cref="InvalidOperationException">if the token kind cannot be converted.</exception>
internal static BinaryOperatorKind ToBinaryOperatorKind(this QueryTokenKind kind) => kind switch
{
/// <summary> /// Returns <c>true</c> if the token kind is a number literal. /// </summary> /// <param name="kind">The <see cref="QueryTokenKind"/> to check.</param> /// <returns><c>true</c> if the token kind is a comparison operator.</returns> internal static bool IsNumberLiteral(this QueryTokenKind kind) => kind == QueryTokenKind.IntegerLiteral | kind == QueryTokenKind.RealLiteral;
/// <summary> /// Returns <c>true</c> if the token kind is a comparison operator. /// </summary> /// <param name="kind">The <see cref="QueryTokenKind"/> to check.</param> /// <returns><c>true</c> if the token kind is a comparison operator.</returns> internal static bool IsComparisonOperator(this QueryTokenKind kind) => kind == QueryTokenKind.Equal || kind == QueryTokenKind.NotEqual || kind == QueryTokenKind.LessThan || kind == QueryTokenKind.LessThanEqual || kind == QueryTokenKind.GreaterThan || kind == QueryTokenKind.GreaterThanEqual;
/// <summary>
/// Throw ODataException on the given QueryTokenKind as not supported for writing to Uri.
/// </summary>
/// <param name="kind">QueryTokenKind that is not supported.</param>
internal static void NotSupported(QueryTokenKind kind)
{
throw new ODataException(Strings.UriBuilder_NotSupportedQueryToken(kind));
}
/// <summary>
/// Creates an AnyNode or an AllNode from the given
/// </summary>
/// <param name="state">State of binding.</param>
/// <param name="parent">Parent node to the lambda.</param>
/// <param name="lambdaExpression">Bound Lambda expression.</param>
/// <param name="newRangeVariable">The new range variable being added by this lambda node.</param>
/// <param name="queryTokenKind">Token kind.</param>
/// <returns>A new LambdaNode bound to metadata.</returns>
internal static LambdaNode CreateLambdaNode(
BindingState state,
CollectionNode parent,
SingleValueNode lambdaExpression,
RangeVariable newRangeVariable,
QueryTokenKind queryTokenKind)
{
LambdaNode lambdaNode;
if (queryTokenKind == QueryTokenKind.Any)
{
lambdaNode = new AnyNode(new Collection<RangeVariable>(state.RangeVariables.ToList()), newRangeVariable)
{
Body = lambdaExpression,
Source = parent,
};
}
else
{
Debug.Assert(queryTokenKind == QueryTokenKind.All, "LambdaQueryNodes must be Any or All only.");
lambdaNode = new AllNode(new Collection<RangeVariable>(state.RangeVariables.ToList()), newRangeVariable)
{
Body = lambdaExpression,
Source = parent,
};
}
return lambdaNode;
}
/// <summary>
/// Throw ODataException on the given QueryTokenKind as not supported for writing to Uri.
/// </summary>
/// <param name="queryTokenKind">QueryTokenKind that is not supported.</param>
internal static void NotSupportedQueryTokenKind(QueryTokenKind queryTokenKind)
{
DebugUtils.CheckNoExternalCallers();
throw new ODataException(Strings.UriBuilder_NotSupportedQueryToken(queryTokenKind));
}
/// <summary>
/// Конструктор.
/// </summary>
/// <param name="kind">Тип токена.</param>
/// <param name="value">Значение токена.</param>
public QueryToken(QueryTokenKind kind, object value)
{
Kind = kind;
Value = value;
}