io.requery.query.function

Class Function<V>

java.lang.Object

io.requery.query.FieldExpression<V>

io.requery.query.function.Function<V>

All Implemented Interfaces:

Aliasable<Expression<V>>, Conditional<LogicalCondition<? extends Expression<V>,?>,V>, Expression<V>, Functional<V>

Direct Known Subclasses:

Abs, Avg, Case, Coalesce, Collate, Count, Lower, Max, Min, Now, Round, Substr, Sum, Trim, Upper

public abstract class Function<V>
extends FieldExpression<V>

Constructor Summary

Constructors

Constructor and Description
Function(String name, Class<V> type)

Method Summary

Modifier and Type	Method and Description
abstract Object[]	arguments()
Function<V>	as(String alias) Alias the instance with the given valid name.
boolean	equals(Object obj)
Expression<?>	expressionForArgument(int i)
String	getAlias()
Class<V>	getClassType()
ExpressionType	getExpressionType()
String	getName()
int	hashCode()

Methods inherited from class io.requery.query.FieldExpression

abs, asc, avg, between, desc, eq, eq, equal, equal, function, greaterThan, greaterThan, greaterThanOrEqual, greaterThanOrEqual, gt, gt, gte, gte, in, in, isNull, lessThan, lessThan, lessThanOrEqual, lessThanOrEqual, like, lower, lt, lt, lte, lte, max, min, ne, ne, notEqual, notEqual, notIn, notIn, notLike, notNull, round, round, substr, sum, trim, trim, upper

Methods inherited from class java.lang.Object

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

Constructor Detail

Function

public Function(String name,
                Class<V> type)

Method Detail

getExpressionType

public ExpressionType getExpressionType()

Specified by:

getExpressionType in interface Expression<V>

Specified by:

getExpressionType in class FieldExpression<V>

Returns:

type of the expression

as

public Function<V> as(String alias)

Description copied from interface: Aliasable

Alias the instance with the given valid name.

Specified by:

as in interface Aliasable<Expression<V>>

Overrides:

as in class FieldExpression<V>

Parameters:

alias - name

Returns:

type after aliasing

getAlias

public String getAlias()

Specified by:

getAlias in interface Aliasable<Expression<V>>

Overrides:

getAlias in class FieldExpression<V>

Returns:

the current alias name.

getClassType

public Class<V> getClassType()

Specified by:

getClassType in interface Expression<V>

Specified by:

getClassType in class FieldExpression<V>

Returns:

Class that results when the expression is evaluated

getName

public String getName()

Specified by:

getName in interface Expression<V>

Specified by:

getName in class FieldExpression<V>

Returns:

identifier of the expression

arguments

public abstract Object[] arguments()

expressionForArgument

public Expression<?> expressionForArgument(int i)

equals

public boolean equals(Object obj)

Overrides:

equals in class FieldExpression<V>

hashCode

public int hashCode()

Overrides:

hashCode in class FieldExpression<V>