com.datastrato.gravitino.rel.expressions

Interface Literal<T>

Type Parameters:

T - the JVM type of value held by the literal

All Superinterfaces:

Expression

All Known Implementing Classes:

Literal.LiteralImpl, LiteralDTO

public interface Literal<T>
extends Expression

Represents a constant literal value in the public expression API.

Nested Class Summary

Nested Classes

Modifier and Type	Interface and Description
static class	Literal.LiteralImpl<T> Creates a literal with the given type value.

Field Summary

Fields inherited from interface com.datastrato.gravitino.rel.expressions.Expression

EMPTY_EXPRESSION, EMPTY_NAMED_REFERENCE

Method Summary

Modifier and Type	Method and Description
default Expression[]	children()
Type	dataType()
static Literal.LiteralImpl<java.lang.Integer>	integer(java.lang.Integer value) Creates an integer literal with the given value.
static <T> Literal.LiteralImpl<T>	of(T value, Type dataType) Creates a literal with the given value and data type.
static Literal.LiteralImpl<java.lang.String>	string(java.lang.String value) Creates a string literal with the given value.
T	value()

Methods inherited from interface com.datastrato.gravitino.rel.expressions.Expression

references

Method Detail

value

T value()

Returns:

The literal value.

dataType

Type dataType()

Returns:

The data type of the literal.

children

default Expression[] children()

Specified by:

children in interface Expression

Returns:

An array of the children of this node. Children should not change.

of

static <T> Literal.LiteralImpl<T> of(T value,
                                     Type dataType)

Creates a literal with the given value and data type.

Type Parameters:

T - the JVM type of value held by the literal

Parameters:

value - the literal value

dataType - the data type of the literal

Returns:

a new Literal instance

integer

static Literal.LiteralImpl<java.lang.Integer> integer(java.lang.Integer value)

Creates an integer literal with the given value.

Parameters:

value - the integer literal value

Returns:

a new Literal instance

string

static Literal.LiteralImpl<java.lang.String> string(java.lang.String value)

Creates a string literal with the given value.

Parameters:

value - the string literal value

Returns:

a new Literal instance