Package software.amazon.smithy.model.traits

Class AbstractTrait

java.lang.Object

software.amazon.smithy.model.traits.AbstractTrait

All Implemented Interfaces:

FromSourceLocation, ToNode, ToShapeId, Trait

Direct Known Subclasses:

ArnReferenceTrait, ArnTrait, AuthDefinitionTrait, AuthorizersTrait, AuthTrait, AwsProtocolTrait, AwsQueryErrorTrait, CfnResourceTrait, ClientContextParamsTrait, ClientDiscoveredEndpointTrait, ClientEndpointDiscoveryTrait, CognitoUserPoolsTrait, ContextParamTrait, CorsTrait, DefaultTrait, DefineConditionKeysTrait, DeprecatedTrait, DynamicTrait, EndpointRuleSetTrait, EndpointTestsTrait, EndpointTrait, EnumTrait, EnumValueTrait, ExamplesTrait, ExternalDocumentationTrait, HttpApiKeyAuthTrait, HttpChecksumTrait, HttpErrorTrait, HttpMalformedRequestTestsTrait, HttpRequestTestsTrait, HttpResponseTestsTrait, HttpTrait, IamActionTrait, IamResourceTrait, IdRefTrait, IntegrationTrait, LengthTrait, MixinTrait, MockIntegrationTrait, OriginalShapeIdTrait, PaginatedTrait, PropertyTrait, ProtocolDefinitionTrait, RangeTrait, RecommendedTrait, ReferencesTrait, RequestCompressionTrait, RetryableTrait, Rpcv2CborTrait, ServiceTrait, SigV4ATrait, SigV4Trait, SmokeTestsTrait, SpecificationExtensionTrait, StandardPartitionalEndpointsTrait, StandardRegionalEndpointsTrait, StaticContextParamsTrait, StringListTrait, StringTrait, TagEnabledTrait, TaggableTrait, TraitDefinition, TraitValidatorsTrait, WaitableTrait, XmlNamespaceTrait

public abstract class AbstractTrait
extends java.lang.Object
implements Trait

Base implementation of traits.

This implementation provides an equals(java.lang.Object) and hashCode() that should work for most traits that extend from this base class. Note that equality for traits that extend from this type are not based on the concrete class, but rather the trait name and the trait's ToNode representation.

The Node value of a trait can be provided when the trait is created using setNodeCache(Node). Note that when setting the node cache, the equality and hashcode of the trait are impacted because they are by default based on thetoNode() value of a trait. This typically isn't an issue until model transformations are performed that modify a trait. In these cases, the original node value of the trait might differ from the updated trait even if they are semantically the same value (for example, if the only change to the trait is modifying its source location, or if a property of the trait was explicitly set to false, but false is omitted when serializing the updated trait to a node value). If this use case needs to be accounted for, you must override equals and hashCode of the trait.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	AbstractTrait.Provider	Basic provider implementation that returns the name of the provided trait.

Constructor Summary

Constructors

Constructor	Description
AbstractTrait(ShapeId id, FromSourceLocation sourceLocation)
AbstractTrait(ShapeId id, Node nodeValue)

Method Summary

Modifier and Type	Method	Description
protected abstract Node	createNode()	The result of toNode is used for hashCodes and equality.
boolean	equals(java.lang.Object other)
SourceLocation	getSourceLocation()	Gets the source location of a value.
int	hashCode()
protected void	setNodeCache(Node value)	Sets the node cache of the trait up front, if known.
Node	toNode()	Converts a value to a Node.
ShapeId	toShapeId()	Gets the shape ID of the trait.
java.lang.String	toString()

Methods inherited from class java.lang.Object

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

Methods inherited from interface software.amazon.smithy.model.traits.Trait

isSynthetic

Constructor Detail

AbstractTrait

public AbstractTrait(ShapeId id,
                     FromSourceLocation sourceLocation)

Parameters:

id - ID of the trait.

sourceLocation - Where the trait was defined.

AbstractTrait

public AbstractTrait(ShapeId id,
                     Node nodeValue)

Parameters:

id - ID of the trait.

nodeValue - The node representation of the shape, if known and trusted.

Method Detail

toShapeId

public final ShapeId toShapeId()

Description copied from interface: Trait

Gets the shape ID of the trait.

Specified by:

toShapeId in interface ToShapeId

Specified by:

toShapeId in interface Trait

Returns:

Returns the fully-qualified shape ID of the trait.

getSourceLocation

public final SourceLocation getSourceLocation()

Description copied from interface: FromSourceLocation

Gets the source location of a value.

Specified by:

getSourceLocation in interface FromSourceLocation

Returns:

Returns the source location of the value.

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object

equals

public boolean equals(java.lang.Object other)

Overrides:

equals in class java.lang.Object

hashCode

public int hashCode()

Overrides:

hashCode in class java.lang.Object

toNode

public final Node toNode()

Description copied from interface: ToNode

Converts a value to a Node.

Specified by:

toNode in interface ToNode

Returns:

Returns the creates Node.

createNode

protected abstract Node createNode()

The result of toNode is used for hashCodes and equality. Subclasses must implement createNode to turn the trait into a Node. This is then cached for subsequent retrievals.

Returns:

Returns the trait as a node.

setNodeCache

protected final void setNodeCache(Node value)

Sets the node cache of the trait up front, if known.

This is useful for maintaining a trait value exactly as provided in a model file, allowing for validation to detect extraneous properties, and removing the need to create the node again when calling createNode.

Parameters:

value - Value to set.