How to use

iterator

method

in

org.apache.cassandra.db.PartitionColumns

private Iterator<ColumnDefinition> nonPkColumnIterator()
{
  final boolean noNonPkColumns = isCompactTable() && CompactTables.hasEmptyCompactValue(this) && !isSuper();
  if (noNonPkColumns)
  {
    return Collections.<ColumnDefinition>emptyIterator();
  }
  else if (isStaticCompactTable())
  {
    return partitionColumns.statics.selectOrderIterator();
  }
  else if (isSuper())
  {
    if (isDense)
      return Iterators.forArray(superCfKeyColumn, superCfValueColumn);
    else
      return Iterators.filter(partitionColumns.iterator(), (c) -> !c.type.isCollection());
  }
  else
    return partitionColumns().selectOrderIterator();
}

private Iterator<ColumnDefinition> nonPkColumnIterator()
{
  final boolean noNonPkColumns = isCompactTable() && CompactTables.hasEmptyCompactValue(this) && !isSuper();
  if (noNonPkColumns)
  {
    return Collections.<ColumnDefinition>emptyIterator();
  }
  else if (isStaticCompactTable())
  {
    return partitionColumns.statics.selectOrderIterator();
  }
  else if (isSuper())
  {
    if (isDense)
      return Iterators.forArray(superCfKeyColumn, superCfValueColumn);
    else
      return Iterators.filter(partitionColumns.iterator(), (c) -> !c.type.isCollection());
  }
  else
    return partitionColumns().selectOrderIterator();
}

private Iterator<ColumnDefinition> nonPkColumnIterator()
{
  final boolean noNonPkColumns = isCompactTable() && CompactTables.hasEmptyCompactValue(this) && !isSuper();
  if (noNonPkColumns)
  {
    return Collections.<ColumnDefinition>emptyIterator();
  }
  else if (isStaticCompactTable())
  {
    return partitionColumns.statics.selectOrderIterator();
  }
  else if (isSuper())
  {
    if (isDense)
      return Iterators.forArray(superCfKeyColumn, superCfValueColumn);
    else
      return Iterators.filter(partitionColumns.iterator(), (c) -> !c.type.isCollection());
  }
  else
    return partitionColumns().selectOrderIterator();
}