Package software.amazon.smithy.model.node

Class NumberNode

java.lang.Object

software.amazon.smithy.model.node.Node

software.amazon.smithy.model.node.NumberNode

All Implemented Interfaces:

FromSourceLocation, ToNode

public final class NumberNode
extends Node

Represents a number node. Number nodes contain a Number value.

Number nodes contain a value. You can inspect its type by calling isNaturalNumber() or isFloatingPointNumber(). Natural numbers are positive, or negative numbers without a decimal part.

Nested Class Summary

Nested classes/interfaces inherited from class software.amazon.smithy.model.node.Node

Node.NonNumericFloat

Constructor Summary

Constructors

Constructor	Description
NumberNode(Number value, SourceLocation sourceLocation)

Method Summary

Modifier and Type	Method	Description
<R> R	accept(NodeVisitor<R> visitor)	Accepts a visitor with the node.
Optional<NumberNode>	asNumberNode()	Gets the node as an NumberNode if it is an number.
boolean	equals(Object other)
NumberNode	expectNumberNode(String errorMessage)	Casts the current node to a NumberNode, throwing ExpectationNotMetException when the node is the wrong type.
NumberNode	expectNumberNode(Supplier<String> errorMessage)	Casts the current node to a NumberNode, throwing ExpectationNotMetException when the node is the wrong type.
NodeType	getType()	Gets the type of the node.
Number	getValue()	Gets the number value.
int	hashCode()
boolean	isFloatingPointNumber()	Returns true if the node contains a floating point number.
boolean	isNaturalNumber()	Returns true if the node contains a natural number.
boolean	isZero()	Returns true if the value of the number contained in the number node is zero, accounting for float, double, bigInteger, bigDecimal, and other numeric types (e.g., 0, 0.0, etc).
String	toString()

Methods inherited from class software.amazon.smithy.model.node.Node

arrayNode, arrayNode, asArrayNode, asBooleanNode, asNullNode, asObjectNode, assertEquals, asStringNode, diff, expectArrayNode, expectArrayNode, expectArrayNode, expectBooleanNode, expectBooleanNode, expectBooleanNode, expectNullNode, expectNullNode, expectNullNode, expectNumberNode, expectObjectNode, expectObjectNode, expectObjectNode, expectStringNode, expectStringNode, expectStringNode, from, from, from, from, fromNodes, fromNodes, fromStrings, fromStrings, getSourceLocation, isArrayNode, isBooleanNode, isNullNode, isNumberNode, isObjectNode, isStringNode, loadArrayOfString, nullNode, objectNode, objectNode, objectNodeBuilder, parse, parse, parse, parse, parseJsonWithComments, parseJsonWithComments, prettyPrintJson, prettyPrintJson, printJson, toNode, withDeepSortedKeys, withDeepSortedKeys

Methods inherited from class java.lang.Object

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

Constructor Details

NumberNode

public NumberNode(Number value,
 SourceLocation sourceLocation)

Method Details

getValue

public Number getValue()

Gets the number value.

Returns:

Returns a number.

isNaturalNumber

public boolean isNaturalNumber()

Returns true if the node contains a natural number.

Returns:

Returns true if the node contains a natural number.

isFloatingPointNumber

public boolean isFloatingPointNumber()

Returns true if the node contains a floating point number.

Returns:

Returns true if the node contains a floating point number.

getType

public NodeType getType()

Description copied from class: Node

Gets the type of the node.

Specified by:

getType in class Node

Returns:

Returns the node type.

accept

public <R> R accept(NodeVisitor<R> visitor)

Description copied from class: Node

Accepts a visitor with the node.

Specified by:

accept in class Node

Type Parameters:

R - visitor return type.

Parameters:

visitor - Visitor to dispatch to.

Returns:

Returns the accepted result.

expectNumberNode

public NumberNode expectNumberNode(String errorMessage)

Description copied from class: Node

Casts the current node to a NumberNode, throwing ExpectationNotMetException when the node is the wrong type.

Overrides:

expectNumberNode in class Node

Parameters:

errorMessage - Error message to use if the node is of the wrong type.

Returns:

Returns a number node.

expectNumberNode

public NumberNode expectNumberNode(Supplier<String> errorMessage)

Description copied from class: Node

Casts the current node to a NumberNode, throwing ExpectationNotMetException when the node is the wrong type.

Overrides:

expectNumberNode in class Node

Parameters:

errorMessage - Error message supplier.

Returns:

Returns a number node.

asNumberNode

public Optional<NumberNode> asNumberNode()

Description copied from class: Node

Gets the node as an NumberNode if it is an number.

Overrides:

asNumberNode in class Node

Returns:

Returns the optional NumberNode.

isZero

public boolean isZero()

Returns true if the value of the number contained in the number node is zero, accounting for float, double, bigInteger, bigDecimal, and other numeric types (e.g., 0, 0.0, etc).

Note that -0 and +0 are considered 0. However, NaN is not considered zero. When unknown number types are encountered, this method will return true if the toString of the given number returns "0", or "0.0". Other kinds of unknown number types will be treated like a double.

Double and float comparisons to zero are exact and use no rounding. The majority of values seen by this method come from models that use "0" or "0.0". However, we can improve this in the future with some kind of epsilon if the need arises.

Returns:

Returns true if set to zero.

equals

public boolean equals(Object other)

Overrides:

equals in class Object

hashCode

public int hashCode()

Overrides:

hashCode in class Object

toString

public String toString()

Overrides:

toString in class Object