Class PolymorphicTypes

java.lang.Object

dev.langchain4j.internal.PolymorphicTypes

public final class PolymorphicTypes
extends Object

Detection and naming for polymorphic base types — sealed interfaces / classes (no annotations needed) and types annotated with Jackson's JsonSubTypes. Used by both schema generation and the Jackson polymorphic-dispatch hook for sealed types.

Field Summary

Fields

Modifier and Type	Field	Description
static final String	DEFAULT_DISCRIMINATOR_PROPERTY	Default discriminator property name when @JsonTypeInfo is not configured.

Method Summary

Modifier and Type	Method	Description
static String	discriminatorPropertyName(Class<?> baseType)	Discriminator property name.
static String	discriminatorValue(Class<?> baseType, Class<?> subtype)	Discriminator value for a subtype.
static List<Class<?>>	findConcreteSubtypes(Class<?> type)	Concrete (instantiable) subtypes for type.
static boolean	isPolymorphic(Class<?> type)	Returns true if type is a polymorphic base — sealed, or annotated with JsonSubTypes — and has at least one concrete subtype discoverable by langchain4j.
static void	verifyJsonTypeInfoIsSupported(Class<?> baseType)	Verifies that the @JsonTypeInfo configuration on baseType (if present) uses settings supported by langchain4j.

Methods inherited from class Object

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

Field Details

DEFAULT_DISCRIMINATOR_PROPERTY

public static final String DEFAULT_DISCRIMINATOR_PROPERTY

Default discriminator property name when @JsonTypeInfo is not configured.

See Also:

• Constant Field Values

Method Details

isPolymorphic

public static boolean isPolymorphic(Class<?> type)

Returns true if type is a polymorphic base — sealed, or annotated with JsonSubTypes — and has at least one concrete subtype discoverable by langchain4j.

findConcreteSubtypes

public static List<Class<?>> findConcreteSubtypes(Class<?> type)

Concrete (instantiable) subtypes for type. Sealed hierarchies are flattened recursively; @JsonSubTypes on the base takes precedence over sealed permits.

discriminatorPropertyName

public static String discriminatorPropertyName(Class<?> baseType)

Discriminator property name. Honors @JsonTypeInfo(property=...) when explicit; otherwise "@type" for @JsonTypeInfo-annotated bases (Jackson's default) and DEFAULT_DISCRIMINATOR_PROPERTY otherwise.

discriminatorValue

public static String discriminatorValue(Class<?> baseType,
 Class<?> subtype)

Discriminator value for a subtype. Resolution order: @JsonSubTypes.Type(name=...) on the base → @JsonTypeName on the subtype → Class.getSimpleName().

verifyJsonTypeInfoIsSupported

public static void verifyJsonTypeInfoIsSupported(Class<?> baseType)

Verifies that the @JsonTypeInfo configuration on baseType (if present) uses settings supported by langchain4j. Throws otherwise so the user gets a clear failure at schema-generation time rather than a silent mismatch.

Supported use: Id.NAME, Id.SIMPLE_NAME.
Supported include: As.PROPERTY, As.EXISTING_PROPERTY.