private IComparable GetValue(ParameterMarkerExpressionSegment expressionSegment, ParameterContext parameterContext)
{
object result = parameterContext.GetParameterValue(expressionSegment.GetParameterName());
ShardingAssert.Else(result is IComparable, "Sharding value must implements IComparable.");
return((IComparable)result);
}
private IComparable GetRouteValue(ISimpleExpressionSegment expressionSegment, ParameterContext parameterContext)
{
object result;
if (expressionSegment is ParameterMarkerExpressionSegment parameterMarkerExpressionSegment)
{
result = parameterContext.GetParameterValue(parameterMarkerExpressionSegment.GetParameterName());
}
else
{
result = ((LiteralExpressionSegment)expressionSegment).GetLiterals();
}
ShardingAssert.Else(result is IComparable, "Sharding value must implements IComparable.");
return((IComparable)result);
}
private object GetShardingColumnSetAssignmentValue(AssignmentSegment assignmentSegment, ParameterContext parameterContext)
{
var segment = assignmentSegment.GetValue();
if (segment is ParameterMarkerExpressionSegment parameterMarkerExpressionSegment)
{
return(parameterContext.GetParameterValue(parameterMarkerExpressionSegment.GetParameterName()));
}
if (segment is LiteralExpressionSegment literalExpressionSegment)
{
return(literalExpressionSegment.GetLiterals());
}
// if (-1 == shardingValueParameterMarkerIndex || shardingValueParameterMarkerIndex > parameters.Count - 1)
// {
// return null;
// }
return(null);
}
private object GetPredicateCompareShardingValue(IExpressionSegment segment, ParameterContext parameterContext)
{
// int shardingValueParameterMarkerIndex;
if (segment is ParameterMarkerExpressionSegment parameterMarkerExpressionSegment)
{
// shardingValueParameterMarkerIndex = parameterMarkerExpressionSegment.GetParameterMarkerIndex();
// if (-1 == shardingValueParameterMarkerIndex || shardingValueParameterMarkerIndex > parameters.Count - 1)
// {
// return null;
// }
return(parameterContext.GetParameterValue(parameterMarkerExpressionSegment.GetParameterName()));
}
if (segment is LiteralExpressionSegment literalExpressionSegment)
{
return(literalExpressionSegment.GetLiterals());
}
return(null);
}
private object GetPredicateInShardingValue(ICollection <IExpressionSegment> segments, ParameterContext parameterContext)
{
// int shardingColumnWhereIndex;
foreach (var segment in segments)
{
if (segment is ParameterMarkerExpressionSegment parameterMarkerExpressionSegment)
{
// shardingColumnWhereIndex = parameterMarkerExpressionSegment.GetParameterMarkerIndex();
// if (-1 == shardingColumnWhereIndex || shardingColumnWhereIndex > parameters.Count - 1)
// {
// continue;
// }
return(parameterContext.GetParameterValue(parameterMarkerExpressionSegment.GetParameterName()));
}
if (segment is LiteralExpressionSegment literalExpressionSegment)
{
return(literalExpressionSegment.GetLiterals());
}
}
return(null);
}
/**
* Get value.
*
* @param index index
* @return value
*/
public object GetValue(int index)
{
IExpressionSegment valueExpression = _valueExpressions[index];
return(valueExpression is ParameterMarkerExpressionSegment parameterMarkerExpression?_parameterContext.GetParameterValue(parameterMarkerExpression.GetParameterName()) : ((LiteralExpressionSegment)valueExpression).GetLiterals());
}
