private Expression FillCondition(MemberExpression node, StringBuilder clause, List <object> parameters)
{
if (node.Expression == null || node.Expression.NodeType == ExpressionType.MemberAccess)
{
var val = GetClosureValue(node);
parameters.Add(val);
clause.Append("?");
return(node);
}
if (node.Expression.NodeType == ExpressionType.Parameter)
{
var columnName = _pocoData.GetColumnName(node.Member);
if (columnName == null)
{
throw new InvalidOperationException(
"Trying to order by a field or property that is ignored or not part of the mapping definition.");
}
clause.Append(Escape(columnName));
return(node);
}
if (node.Expression.NodeType == ExpressionType.Constant)
{
var val = GetClosureValue(node);
if (val is CqlToken)
{
clause.Append("token(");
var tokenValues = (val as CqlToken).Values;
var tokenPlaceholders = new StringBuilder(tokenValues.Length * 3);
foreach (var pk in tokenValues)
{
parameters.Add(pk);
tokenPlaceholders.Append(tokenPlaceholders.Length == 0 ? "?" : ", ?");
}
clause.Append(")");
}
else
{
parameters.Add(val);
clause.Append("?");
}
return(node);
}
return(node);
}
private Expression FillOrderBy(MemberExpression node)
{
var columnName = _pocoData.GetColumnName(node.Member);
if (columnName == null)
{
throw new InvalidOperationException(
"Trying to order by a field or property that is ignored or not part of the mapping definition.");
}
_orderBy.Add(Tuple.Create(columnName, _parsePhase.Get() == ParsePhase.OrderBy));
if ((node.Expression is ConstantExpression))
{
return(node);
}
if (node.Expression.NodeType == ExpressionType.Parameter)
{
return(node);
}
throw new CqlLinqNotSupportedException(node, _parsePhase.Get());
}
protected override Expression VisitMember(MemberExpression node)
{
switch (_parsePhase.Get())
{
case ParsePhase.Condition:
{
var clause = _currentCondition.Get().Item1;
var parameters = _currentCondition.Get().Item2;
if (node.Expression == null)
{
var val = Expression.Lambda(node).Compile().DynamicInvoke();
parameters.Add(val);
clause.Append("?");
return(node);
}
if (node.Expression.NodeType == ExpressionType.Parameter)
{
var columnName = _pocoData.GetColumnName(node.Member);
if (columnName == null)
{
throw new InvalidOperationException(
"Trying to order by a field or property that is ignored or not part of the mapping definition.");
}
clause.Append(Escape(columnName));
return(node);
}
if (node.Expression.NodeType == ExpressionType.Constant)
{
var val = Expression.Lambda(node).Compile().DynamicInvoke();
if (val is CqlToken)
{
clause.Append("token(");
var tokenPlaceholders = new StringBuilder();
foreach (var pk in (val as CqlToken).Values)
{
parameters.Add(pk);
tokenPlaceholders.Append(tokenPlaceholders.Length == 0 ? "?" : ", ?");
}
clause.Append(")");
}
else
{
parameters.Add(val);
clause.Append("?");
}
return(node);
}
if (node.Expression.NodeType == ExpressionType.MemberAccess)
{
var val = Expression.Lambda(node).Compile().DynamicInvoke();
parameters.Add(val);
clause.Append("?");
return(node);
}
break;
}
case ParsePhase.SelectBinding:
{
PocoColumn column;
if (node.Expression == null || node.Expression.NodeType != ExpressionType.Parameter)
{
column = _pocoData.GetColumnByMemberName(_currentBindingName.Get());
AddProjection(node, column);
_selectFields.Add(column.ColumnName);
return(node);
}
column = _pocoData.GetColumnByMemberName(node.Member.Name);
_projections.Add(Tuple.Create(column, (object)column.ColumnName, ExpressionType.Assign));
_selectFields.Add(column.ColumnName);
return(node);
}
case ParsePhase.OrderByDescending:
case ParsePhase.OrderBy:
{
var columnName = _pocoData.GetColumnName(node.Member);
if (columnName == null)
{
throw new InvalidOperationException(
"Trying to order by a field or property that is ignored or not part of the mapping definition.");
}
_orderBy.Add(Tuple.Create(columnName, _parsePhase.Get() == ParsePhase.OrderBy));
if ((node.Expression is ConstantExpression))
{
return(node);
}
if (node.Expression.NodeType == ExpressionType.Parameter)
{
return(node);
}
break;
}
}
throw new CqlLinqNotSupportedException(node, _parsePhase.Get());
}
