ch.jalu.datasourcecolumns

Interface Column<T,C>

Type Parameters:

T - the type of the column

C - the context type (typically an object holding some configurable values)

All Known Subinterfaces:

DependentColumn<T,C,D>

public interface Column<T,C>

Column interface. Represents a datum from a data source, e.g. a column in a SQL table.

Method Summary

Modifier and Type	Method and Description
ColumnType<T>	getType()
boolean	isColumnUsed(C context) Returns whether this column should be used.
String	resolveName(C context) Returns the column's name, based on the context.
boolean	useDefaultForNullValue(C context) Returns whether the SQL keyword DEFAULT should be used in INSERT and UPDATE operations if the value associated with the column is resolved to null.

Method Detail

resolveName

String resolveName(C context)

Returns the column's name, based on the context.

Parameters:

context - the context to resolve the name with

Returns:

the name of the column (may be empty, never null)

getType

ColumnType<T> getType()

Returns:

the type of the value represented by this column

isColumnUsed

boolean isColumnUsed(C context)

Returns whether this column should be used.

Parameters:

context - the context to resolve the value with

Returns:

true if this column should be included in a data source operation, false if it should be ignored (column doesn't exist in the data source)

useDefaultForNullValue

boolean useDefaultForNullValue(C context)

Returns whether the SQL keyword DEFAULT should be used in INSERT and UPDATE operations if the value associated with the column is resolved to null.

Parameters:

context - the context to resolve the value with

Returns:

true if DEFAULT should be used instead of null, false if null values should be used