private Clause CreateClauseFromExpression(BinaryExpression binaryExp)
{
if (binaryExp.NodeType == ExpressionType.AndAlso || binaryExp.NodeType == ExpressionType.OrElse)
{
BinaryExpression leftExpression = binaryExp.Left as BinaryExpression;
if (leftExpression == null)
{
throw new UnsupportedExpressionException("Expression in left side is invalid.", nameof(BinaryExpression));
}
BinaryExpression rightsExpression = binaryExp.Right as BinaryExpression;
if (rightsExpression == null)
{
throw new UnsupportedExpressionException("Expression in right side is invalid.", nameof(BinaryExpression));
}
return(new LogicalClause(
SqlBuilderHelper.MapExpressionTypeToBooleanOperation(binaryExp.NodeType),
CreateClauseFromExpression(leftExpression),
CreateClauseFromExpression(rightsExpression)
));
}
return(new ComparisonClause(
SqlBuilderHelper.MapExpressionTypeToBinaryOperation(binaryExp.NodeType),
SqlBuilderHelper.GetClassNameFromExpression(binaryExp.Left),
SqlBuilderHelper.GetMemberNameFromExpression(binaryExp.Left),
SqlBuilderHelper.GetRightValueFromBinaryExpression(binaryExp)
));
}
public ComparisonClause(Expression <Func <T, object> > expression)
{
BinaryExpression binaryExp = SqlBuilderHelper.ConvertToBinaryExpression(expression);
Initialize(
SqlBuilderHelper.MapExpressionTypeToBinaryOperation(binaryExp.NodeType),
typeof(T).Name,
SqlBuilderHelper.GetMemberNameFromExpression(binaryExp.Left),
SqlBuilderHelper.GetRightValueFromBinaryExpression(binaryExp)
);
}
private Dictionary <string, object> GetFieldsToUpsertFromExpression <T>(IEnumerable <Expression <Func <T, object> > > fieldValues)
{
if (fieldValues == null || !fieldValues.Any())
{
throw new ArgumentNullException(nameof(fieldValues));
}
Dictionary <string, object> propsToInsert = new Dictionary <string, object>();
foreach (Expression <Func <T, object> > item in fieldValues)
{
BinaryExpression binaryExp = SqlBuilderHelper.ConvertToBinaryExpression(item);
string fieldName = SqlBuilderHelper.GetMemberNameFromExpression(binaryExp.Left);
object value = SqlBuilderHelper.GetRightValueFromBinaryExpression(binaryExp);
propsToInsert.Add(fieldName, value);
}
return(propsToInsert);
}