Package io.github.torand.fastersql.alias

Class ColumnAlias

java.lang.Object

io.github.torand.fastersql.alias.ColumnAlias

All Implemented Interfaces:

Alias, OrderExpression, LeftOperand, Sql

public class ColumnAlias
extends Object
implements Alias, LeftOperand, OrderExpression

Represents an alias (label) for a projection

Constructor Summary

Constructors

Constructor	Description
ColumnAlias(String name)	Creates a column alias with specified name.

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.
static ColumnAlias	generate(String prefix)	Factory method to create a random column alias using specified prefix.
String	name()	Gets the alias name.
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.predicate.LeftOperand

eq, eq, eq, eq, ge, ge, ge, ge, gt, gt, gt, gt, in, in, in, in, isNull, le, le, le, le, like, like, lt, lt, lt, lt

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

asc, ascIf, desc

Constructor Details

ColumnAlias

public ColumnAlias(String name)

Creates a column alias with specified name.

Parameters:

name - the alias name.

Method Details

generate

public static ColumnAlias generate(String prefix)

Factory method to create a random column alias using specified prefix.

Parameters:

prefix - the prefix.

Returns:

the column alias.

name

public String name()

Description copied from interface: Alias

Gets the alias name.

Specified by:

name in interface Alias

Returns:

the alias name.

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.