schema.go

package sif

// Schema is a mapping from column names to column definitions within a Row.
type Schema interface {
	Equals(otherSchema Schema) error                            // Equals return true iff this Schema is identical to otherSchema
	Clone() Schema                                              // Clone() returns a deep copy of this Schema
	NumColumns() int                                            // NumColumns returns the number of columns in this Schema.
	NumFixedWidthColumns() int                                  // NumFixedWidthColumns returns the number of fixed-length columns in this Schema.
	NumVariableWidthColumns() int                               // NumVariableWidthColumns returns the number of variable-length columns in this Schema.
	GetColumn(colName string) (col Column, err error)           // GetColumn returns the Column associated with colName, or an error if none exists
	HasColumn(colName string) bool                              // HasColumn returns true iff colName corresponds to a Column in this Schema
	ColumnNames() []string                                      // ColumnNames returns a list of Column names in this Schema, in the order they were created
	ColumnTypes() []ColumnType                                  // ColumnTypes returns a list of Column types in this Schema, in the order they were created
	ColumnAccessors() []ColumnAccessor                          // ColumnAccessors returns a list of ColumnAccessors in this Schema, in the order they were created
	ForEachColumn(fn func(name string, col Column) error) error // ForEachColumn runs a function for each Column in this Schema
}