public static string GetDeleteCQLAndValues(object row, string quotedtablename, out object[] values, bool withValues = true)
{
var cqlTool = new CqlStringTool();
Type rowType = row.GetType();
var sb = new StringBuilder();
sb.Append("DELETE FROM ");
sb.Append(quotedtablename);
sb.Append(" WHERE ");
List <MemberInfo> props = rowType.GetPropertiesOrFields();
bool first = true;
foreach (MemberInfo prop in props)
{
var pk = prop.GetCustomAttributes(typeof(PartitionKeyAttribute), true).FirstOrDefault() as PartitionKeyAttribute;
if (pk == null)
{
var rk = prop.GetCustomAttributes(typeof(ClusteringKeyAttribute), true).FirstOrDefault() as ClusteringKeyAttribute;
if (rk == null)
{
continue;
}
}
object pv = prop.GetValueFromPropertyOrField(row);
if (pv != null)
{
if (first)
{
first = false;
}
else
{
sb.Append(" AND ");
}
string memName = CalculateMemberName(prop);
sb.Append(memName.QuoteIdentifier());
sb.Append(" = " + cqlTool.AddValue(pv) + " ");
}
}
if (withValues)
{
return(cqlTool.FillWithValues(sb.ToString(), out values));
}
else
{
values = null;
return(cqlTool.FillWithEncoded(sb.ToString()));
}
}
public static string GetUpdateCQLAndValues(object row, object newRow, string quotedtablename, out object[] values, bool all = false,
bool withValues = true)
{
var cqlTool = new CqlStringTool();
Type rowType = row.GetType();
var set = new StringBuilder();
var where = new StringBuilder();
List <MemberInfo> props = rowType.GetPropertiesOrFields();
bool firstSet = true;
bool firstWhere = true;
bool changeDetected = false;
foreach (MemberInfo prop in props)
{
string memName = CalculateMemberName(prop);
var pk = prop.GetCustomAttributes(typeof(PartitionKeyAttribute), true).FirstOrDefault() as PartitionKeyAttribute;
if (pk == null)
{
var rk = prop.GetCustomAttributes(typeof(ClusteringKeyAttribute), true).FirstOrDefault() as ClusteringKeyAttribute;
if (rk == null)
{
var counter = prop.GetCustomAttributes(typeof(CounterAttribute), true).FirstOrDefault() as CounterAttribute;
if (counter != null)
{
long diff = (Int64)prop.GetValueFromPropertyOrField(newRow) - (Int64)prop.GetValueFromPropertyOrField(row);
if (diff != 0 || (Int64)prop.GetValueFromPropertyOrField(newRow) == 0)
{
changeDetected = true;
if (firstSet)
{
firstSet = false;
}
else
{
set.Append(", ");
}
set.Append(memName.QuoteIdentifier() + " = " + memName.QuoteIdentifier());
set.Append((diff >= 0) ? "+" + diff : diff.ToString(CultureInfo.InvariantCulture));
}
continue;
}
else
{
object newVal = prop.GetValueFromPropertyOrField(newRow);
if (newVal != null)
{
bool areDifferent = !newVal.Equals(prop.GetValueFromPropertyOrField(row));
if (all || (areDifferent))
{
if (areDifferent)
{
changeDetected = true;
}
if (firstSet)
{
firstSet = false;
}
else
{
set.Append(", ");
}
set.Append(memName.QuoteIdentifier());
set.Append(" = " + cqlTool.AddValue(newVal) + " ");
}
}
else
{
changeDetected = true;
if (firstSet)
{
firstSet = false;
}
else
{
set.Append(", ");
}
set.Append(memName.QuoteIdentifier());
set.Append(" = NULL ");
}
continue;
}
}
}
object pv = prop.GetValueFromPropertyOrField(row);
if (pv != null)
{
if (firstWhere)
{
firstWhere = false;
}
else
{
where.Append(" AND ");
}
where.Append(memName.QuoteIdentifier());
where.Append(" = " + cqlTool.AddValue(pv) + " ");
}
}
values = null;
if (!changeDetected)
{
return(null);
}
var sb = new StringBuilder();
sb.Append("UPDATE ");
sb.Append(quotedtablename);
sb.Append(" SET ");
sb.Append(set);
sb.Append(" WHERE ");
sb.Append(where);
if (withValues)
{
return(cqlTool.FillWithValues(sb.ToString(), out values));
}
else
{
values = null;
return(cqlTool.FillWithEncoded(sb.ToString()));
}
}
public static string GetInsertCQLAndValues(object row, string quotedtablename, out object[] values, int?ttl, DateTimeOffset?timestamp,
bool ifNotExists, bool withValues = true)
{
var cqlTool = new CqlStringTool();
Type rowType = row.GetType();
var sb = new StringBuilder();
sb.Append("INSERT INTO ");
sb.Append(quotedtablename);
sb.Append("(");
List <MemberInfo> props = rowType.GetPropertiesOrFields();
bool first = true;
foreach (MemberInfo prop in props)
{
if (first)
{
first = false;
}
else
{
sb.Append(", ");
}
string memName = CalculateMemberName(prop);
sb.Append(memName.QuoteIdentifier());
}
sb.Append(") VALUES (");
first = true;
foreach (MemberInfo prop in props)
{
object val = prop.GetValueFromPropertyOrField(row);
if (first)
{
first = false;
}
else
{
sb.Append(", ");
}
sb.Append(cqlTool.AddValue(val));
}
sb.Append(")");
if (ifNotExists)
{
sb.Append(" IF NOT EXISTS");
}
if (ttl != null || timestamp != null)
{
sb.Append(" USING");
}
if (ttl != null)
{
sb.Append(" TTL ");
sb.Append(ttl.Value);
if (timestamp != null)
{
sb.Append(" AND");
}
}
if (timestamp != null)
{
sb.Append(" TIMESTAMP ");
sb.Append((timestamp.Value - CqlQueryTools.UnixStart).Ticks / 10);
}
if (withValues)
{
return(cqlTool.FillWithValues(sb.ToString(), out values));
}
else
{
values = null;
return(cqlTool.FillWithEncoded(sb.ToString()));
}
}
