/// <summary>
/// Parser for ExpressionPredicate
/// </summary>
/// <param name="parsedExpression">Expression which is already parsed</param>
/// <returns>Parsed ExpressionPredicate</returns>
public ExpressionPredicate ParseExpressionPredicate(Expression parsedExpression)
{
ExpressionPredicate expressionPredicate = new ExpressionPredicate();
expressionPredicate.SetExpression(parsedExpression);
return expressionPredicate;
}
/// <summary>
/// Parse an CatExpression
/// </summary>
/// <param name="expression">Expression which is already parsed</param>
/// <returns></returns>
public Expression ParseCatExpression(Expression expression)
{
CatExpression catExpression = new CatExpression();
//Left part of catenation expression
catExpression.SetLeftExpression(expression);
//Skip + token
NextToken("+", "expression + expression", '+');
//Parse right part of token
catExpression.SetRightExpression(ParseExpression());
return catExpression;
}
/// <summary>
/// Parser for IsPredicate
/// </summary>
/// <returns>Parsed IsPredicate</returns>
public IsPredicate ParseIsPredicate(Expression parsedExpression)
{
IsPredicate isPredicate = new IsPredicate();
//Set already parsed expression
isPredicate.SetExpression(parsedExpression);
//Skip . token
NextToken(".", "Expression.Type?", '.');
//Parse type
isPredicate.SetType(ParseType());
//Skip ? token
NextToken("?", "Expression.Type?", '?');
return isPredicate;
}
/// <summary>
/// Add expression to ListExpression
/// </summary>
/// <param name="expression">Expression to add</param>
public void AddExpression(Expression expression)
{
ExpressionList.Add(expression);
}
/// <summary>
/// Set expression of ExpressionArgument
/// </summary>
/// <param name="expression">Expression to set</param>
public void SetExpression(Expression expression)
{
Expr = expression;
}
/// <summary>
/// Parse an FieldExpression
/// </summary>
/// <param name="expression">Expression which is already parsed</param>
/// <returns></returns>
public Expression ParseFieldExpression(Expression expression)
{
FieldExpression fieldExpression = new FieldExpression();
//Add already parsed expression to field
fieldExpression.SetExpression(expression);
//Skip . token
NextToken(".", "expression.identifier", '.');
//Parse identifier
CurrentToken = TokenStream.NextToken();
fieldExpression.SetIdentifier(CurrentToken.GetValue().ToString());
return fieldExpression;
}
/// <summary>
/// Set right expression
/// </summary>
/// <param name="rightExpression">Expression</param>
public void SetRightExpression(Expression rightExpression)
{
RightExpression = rightExpression;
}
/// <summary>
/// Set left expression
/// </summary>
/// <param name="leftExpression">Expression</param>
public void SetLeftExpression(Expression leftExpression)
{
LeftExpression = leftExpression;
}