Module nl.jqno.equalsverifier

Package nl.jqno.equalsverifier.internal.reflection

Class SubtypeManager

java.lang.Object

nl.jqno.equalsverifier.internal.reflection.SubtypeManager

public final class SubtypeManager
extends Object

Can find subtypes that can be instantiated. Useful for abstract classes, interfaces, and sealed types.

Field Summary

Fields

Modifier and Type	Field	Description
private static final String	FALLBACK_PACKAGE_NAME
private static final List<String>	FORBIDDEN_PACKAGES

Constructor Summary

Constructors

Modifier	Constructor	Description
private	SubtypeManager()

Method Summary

Modifier and Type	Method	Description
(package private) static <T> Stream<Class<? extends T>>	findAllInstantiablePermittedSubclasses(ClassProbe<T> probe)
private static <T> Class<T>	findInstantiablePermittedSubclass(ClassProbe<T> probe, ValueProvider vp, Attributes attributes)
static <T> Class<T>	findInstantiableSubclass(ClassProbe<T> probe, ValueProvider vp, Attributes attributes)	Finds a subtype that can be instantiated.
private static <S> net.bytebuddy.dynamic.loading.ClassLoadingStrategy<ClassLoader>	getClassLoadingStrategy(Class<S> context)
private static String	getPackageName(Class<?> type)
static <S> Class<S>	giveDynamicSubclass(Class<S> superclass)	Generates an anonymous subclass of S.
static <S> Class<S>	giveDynamicSubclass(Class<S> superclass, String nameSuffix, UnaryOperator<net.bytebuddy.dynamic.DynamicType.Builder<S>> modify)	Generates an anonymous subclass of S.
private static <T> boolean	isRecursive(Class<T> type, ValueProvider vp, Attributes attributes)
private static boolean	isSystemClass(String className)
private static <T> boolean	isUsable(Class<T> type, ValueProvider vp, Attributes attributes)

Methods inherited from class java.lang.Object

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

Field Details

FORBIDDEN_PACKAGES

private static final List<String> FORBIDDEN_PACKAGES

FALLBACK_PACKAGE_NAME

private static final String FALLBACK_PACKAGE_NAME

Constructor Details

SubtypeManager

private SubtypeManager()

Method Details

findInstantiableSubclass

public static <T> Class<T> findInstantiableSubclass(ClassProbe<T> probe,
 ValueProvider vp,
 Attributes attributes)

Finds a subtype that can be instantiated.

Type Parameters:

T - Represent the class to find an instantiable subtype for.

Parameters:

probe - Represents the class to find an instantiable subtype for.

vp - Used to test if the subtype of a sealed type can indeed be instantiated.

attributes - Used by the vp.

Returns:

An instantiable subtype, or null if none can be found.

Throws:

NoValueException - if no subtype can be found. This only happens for sealed types, when all permitted subclasses are recursive.

giveDynamicSubclass

public static <S> Class<S> giveDynamicSubclass(Class<S> superclass)

Generates an anonymous subclass of S. The subclass is generated dynamically.

Type Parameters:

S - The class to create a dynamic subclass of.

Parameters:

superclass - The class to create a dynamic subclass of.

Returns:

An instance of an anonymous subclass of S.

giveDynamicSubclass

public static <S> Class<S> giveDynamicSubclass(Class<S> superclass,
 String nameSuffix,
 UnaryOperator<net.bytebuddy.dynamic.DynamicType.Builder<S>> modify)

Generates an anonymous subclass of S. The subclass is generated dynamically.

Type Parameters:

S - The class to create a dynamic subclass of.

Parameters:

superclass - The class to create a dynamic subclass of.

nameSuffix - A constant that will be appended to the name of the newly generated class.

modify - Allows custom modifications to the generated class.

Returns:

An instance of an anonymous subclass of S.

findInstantiablePermittedSubclass

private static <T> Class<T> findInstantiablePermittedSubclass(ClassProbe<T> probe,
 ValueProvider vp,
 Attributes attributes)

isUsable

private static <T> boolean isUsable(Class<T> type,
 ValueProvider vp,
 Attributes attributes)

isRecursive

private static <T> boolean isRecursive(Class<T> type,
 ValueProvider vp,
 Attributes attributes)

findAllInstantiablePermittedSubclasses

static <T> Stream<Class<? extends T>> findAllInstantiablePermittedSubclasses(ClassProbe<T> probe)

getClassLoadingStrategy

private static <S>
net.bytebuddy.dynamic.loading.ClassLoadingStrategy<ClassLoader> getClassLoadingStrategy(Class<S> context)

isSystemClass

private static boolean isSystemClass(String className)

getPackageName

private static String getPackageName(Class<?> type)