Package io.github.torand.fastersql.projection

Class ColumnPosition

java.lang.Object

io.github.torand.fastersql.projection.ColumnPosition

All Implemented Interfaces:

OrderExpression, Sql

public class ColumnPosition
extends Object
implements Sql, OrderExpression

Represents an enumeration of a projection, that is, a 1-based number referencing a single projection element in a SELECT clause.

Constructor Summary

Constructors

Constructor	Description
ColumnPosition(int position)	Creates a column position.

Method Summary

Modifier and Type	Method	Description
Stream<ColumnAlias>	aliasRefs()	Gets the column aliases referenced by this fragment.
Stream<Column>	columnRefs()	Gets the columns referenced by this fragment.
Stream<Object>	params(Context context)	Gets the statement parameters introduced by this fragment.
String	sql(Context context)	Formats object as an SQL fragment.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface io.github.torand.fastersql.order.OrderExpression

asc, ascIf, desc

Constructor Details

ColumnPosition

public ColumnPosition(int position)

Creates a column position.

Parameters:

position - the 1-based position.

Method Details

sql

public String sql(Context context)

Description copied from interface: Sql

Formats object as an SQL fragment.

Specified by:

sql in interface Sql

Parameters:

context - the context (incl. dialect).

Returns:

the formatted SQL fragment.

params

public Stream<Object> params(Context context)

Description copied from interface: Sql

Gets the statement parameters introduced by this fragment.

Specified by:

params in interface Sql

Parameters:

context - the context (incl. dialect).

Returns:

the statement parameters.

columnRefs

public Stream<Column> columnRefs()

Description copied from interface: Sql

Gets the columns referenced by this fragment. For validation purposes.

Specified by:

columnRefs in interface Sql

Returns:

the columns referenced by this fragment.

aliasRefs

public Stream<ColumnAlias> aliasRefs()

Description copied from interface: Sql

Gets the column aliases referenced by this fragment. For validation purposes.

Specified by:

aliasRefs in interface Sql

Returns:

the column aliases referenced by this fragment.