Package nonapi.io.github.classgraph.json

Class ClassFieldCache

  • class ClassFieldCache
extends java.lang.Object
    A cache of field types and associated constructors for each encountered class, used to speed up constructor lookup.

    • Nested Class Summary

      Nested Classes 
      Modifier and Type Class Description
      private static class  ClassFieldCache.NoConstructor
      Placeholder class to signify no constructor was found previously.

    • Constructor Summary

      Constructors 
      Constructor Description
      ClassFieldCache​(boolean forDeserialization, boolean onlySerializePublicFields, ReflectionUtils reflectionUtils)
      Create a class field cache.

    • Method Summary

      All Methods Static Methods Instance Methods Concrete Methods 
      Modifier and Type Method Description
      (package private) ClassFields get​(java.lang.Class<?> cls)
      For a given resolved type, find the visible and accessible fields, resolve the types of any generically typed fields, and return the resolved fields.
      private static java.lang.Class<?> getConcreteType​(java.lang.Class<?> rawType, boolean returnNullIfNotMapOrCollection)
      Get the concrete type for a map or collection whose raw type is an interface or abstract class.
      (package private) java.lang.reflect.Constructor<?> getConstructorWithSizeHintForConcreteTypeOf​(java.lang.Class<?> cls)
      Get the concrete type of the given class, then return the constructor for that type that takes a single integer parameter (the initial size hint, for Collection or Map).
      (package private) java.lang.reflect.Constructor<?> getDefaultConstructorForConcreteTypeOf​(java.lang.Class<?> cls)
      Get the concrete type of the given class, then return the default constructor for that type.

      • Methods inherited from class java.lang.Object

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

    • Field Detail

      • classToClassFields

        private final java.util.Map<java.lang.Class<?>,​ClassFields> classToClassFields
        The map from class ref to class fields.

      • resolveTypes

        private final boolean resolveTypes
        Whether or not to resolve types.

      • onlySerializePublicFields

        private final boolean onlySerializePublicFields
        Whether or not to serialize public fields.

      • defaultConstructorForConcreteType

        private final java.util.Map<java.lang.Class<?>,​java.lang.reflect.Constructor<?>> defaultConstructorForConcreteType
        The default constructor for each concrete type.

      • constructorForConcreteTypeWithSizeHint

        private final java.util.Map<java.lang.Class<?>,​java.lang.reflect.Constructor<?>> constructorForConcreteTypeWithSizeHint
        The constructor with size hint for each concrete type.

      • NO_CONSTRUCTOR

        private static final java.lang.reflect.Constructor<?> NO_CONSTRUCTOR
        Placeholder constructor to signify no constructor was found previously.

    • Constructor Detail

      • ClassFieldCache

        ClassFieldCache​(boolean forDeserialization,
                boolean onlySerializePublicFields,
                ReflectionUtils reflectionUtils)
        Create a class field cache.
        Parameters:
        forDeserialization - Set this to true if the cache will be used for deserialization (or both serialization and deserialization), or false if just used for serialization (for speed).
        onlySerializePublicFields - Set this to true if you only want to serialize public fields (ignored for deserialization).

    • Method Detail

      • get

        ClassFields get​(java.lang.Class<?> cls)
        For a given resolved type, find the visible and accessible fields, resolve the types of any generically typed fields, and return the resolved fields.
        Parameters:
        cls - the cls
        Returns:
        the class fields

      • getConcreteType

        private static java.lang.Class<?> getConcreteType​(java.lang.Class<?> rawType,
                                                  boolean returnNullIfNotMapOrCollection)
        Get the concrete type for a map or collection whose raw type is an interface or abstract class.
        Parameters:
        rawType - the raw type
        returnNullIfNotMapOrCollection - return null if not map or collection
        Returns:
        the concrete type

      • getDefaultConstructorForConcreteTypeOf

        java.lang.reflect.Constructor<?> getDefaultConstructorForConcreteTypeOf​(java.lang.Class<?> cls)
        Get the concrete type of the given class, then return the default constructor for that type.
        Parameters:
        cls - the class
        Returns:
        the default constructor for concrete type of class
        Throws:
        java.lang.IllegalArgumentException - if no default constructor is both found and accessible.

      • getConstructorWithSizeHintForConcreteTypeOf

        java.lang.reflect.Constructor<?> getConstructorWithSizeHintForConcreteTypeOf​(java.lang.Class<?> cls)
        Get the concrete type of the given class, then return the constructor for that type that takes a single integer parameter (the initial size hint, for Collection or Map). Returns null if not a Collection or Map, or there is no constructor with size hint.
        Parameters:
        cls - the class
        Returns:
        the constructor with size hint for concrete type of class