Class ClassHelper


  • public class ClassHelper
    extends Object
    This class is a Helper for ClassNode and classes handling ClassNodes. It does contain a set of predefined ClassNodes for the most used types and some code for cached ClassNode creation and basic ClassNode handling
    • Field Detail

      • TUPLE_CLASSES

        public static final Class[] TUPLE_CLASSES
      • DYNAMIC_TYPE

        public static final ClassNode DYNAMIC_TYPE
      • OBJECT_TYPE

        public static final ClassNode OBJECT_TYPE
      • VOID_TYPE

        public static final ClassNode VOID_TYPE
      • CLOSURE_TYPE

        public static final ClassNode CLOSURE_TYPE
      • GSTRING_TYPE

        public static final ClassNode GSTRING_TYPE
      • LIST_TYPE

        public static final ClassNode LIST_TYPE
      • TUPLE_TYPE

        public static final ClassNode TUPLE_TYPE
      • MAP_TYPE

        public static final ClassNode MAP_TYPE
      • RANGE_TYPE

        public static final ClassNode RANGE_TYPE
      • PATTERN_TYPE

        public static final ClassNode PATTERN_TYPE
      • STRING_TYPE

        public static final ClassNode STRING_TYPE
      • SCRIPT_TYPE

        public static final ClassNode SCRIPT_TYPE
      • REFERENCE_TYPE

        public static final ClassNode REFERENCE_TYPE
      • BINDING_TYPE

        public static final ClassNode BINDING_TYPE
      • boolean_TYPE

        public static final ClassNode boolean_TYPE
      • char_TYPE

        public static final ClassNode char_TYPE
      • byte_TYPE

        public static final ClassNode byte_TYPE
      • int_TYPE

        public static final ClassNode int_TYPE
      • long_TYPE

        public static final ClassNode long_TYPE
      • short_TYPE

        public static final ClassNode short_TYPE
      • double_TYPE

        public static final ClassNode double_TYPE
      • float_TYPE

        public static final ClassNode float_TYPE
      • Byte_TYPE

        public static final ClassNode Byte_TYPE
      • Short_TYPE

        public static final ClassNode Short_TYPE
      • Integer_TYPE

        public static final ClassNode Integer_TYPE
      • Long_TYPE

        public static final ClassNode Long_TYPE
      • Character_TYPE

        public static final ClassNode Character_TYPE
      • Float_TYPE

        public static final ClassNode Float_TYPE
      • Double_TYPE

        public static final ClassNode Double_TYPE
      • Boolean_TYPE

        public static final ClassNode Boolean_TYPE
      • BigInteger_TYPE

        public static final ClassNode BigInteger_TYPE
      • BigDecimal_TYPE

        public static final ClassNode BigDecimal_TYPE
      • Number_TYPE

        public static final ClassNode Number_TYPE
      • void_WRAPPER_TYPE

        public static final ClassNode void_WRAPPER_TYPE
      • METACLASS_TYPE

        public static final ClassNode METACLASS_TYPE
      • Iterator_TYPE

        public static final ClassNode Iterator_TYPE
      • Enum_Type

        public static final ClassNode Enum_Type
      • Annotation_TYPE

        public static final ClassNode Annotation_TYPE
      • ELEMENT_TYPE_TYPE

        public static final ClassNode ELEMENT_TYPE_TYPE
      • CLASS_Type

        public static final ClassNode CLASS_Type
      • COMPARABLE_TYPE

        public static final ClassNode COMPARABLE_TYPE
      • GENERATED_CLOSURE_Type

        public static final ClassNode GENERATED_CLOSURE_Type
      • GENERATED_LAMBDA_TYPE

        public static final ClassNode GENERATED_LAMBDA_TYPE
      • GROOVY_OBJECT_SUPPORT_TYPE

        public static final ClassNode GROOVY_OBJECT_SUPPORT_TYPE
      • GROOVY_OBJECT_TYPE

        public static final ClassNode GROOVY_OBJECT_TYPE
      • GROOVY_INTERCEPTABLE_TYPE

        public static final ClassNode GROOVY_INTERCEPTABLE_TYPE
      • EMPTY_TYPE_ARRAY

        protected static final ClassNode[] EMPTY_TYPE_ARRAY
    • Constructor Detail

      • ClassHelper

        public ClassHelper()
    • Method Detail

      • make

        public static ClassNode[] make​(Class[] classes)
        Creates an array of ClassNodes using an array of classes. For each of the given classes a new ClassNode will be created
        Parameters:
        classes - an array of classes used to create the ClassNodes
        Returns:
        an array of ClassNodes
        See Also:
        make(Class)
      • make

        public static ClassNode make​(Class c)
        Creates a ClassNode using a given class. A new ClassNode object is only created if the class is not one of the predefined ones
        Parameters:
        c - class used to created the ClassNode
        Returns:
        ClassNode instance created from the given class
      • make

        public static ClassNode make​(Class c,
                                     boolean includeGenerics)
      • makeWithoutCaching

        public static ClassNode makeWithoutCaching​(Class c)
      • makeWithoutCaching

        public static ClassNode makeWithoutCaching​(Class c,
                                                   boolean includeGenerics)
      • makeWithoutCaching

        public static ClassNode makeWithoutCaching​(String name)
        Creates a ClassNode using a given class. Unlike make(String) this method will not use the cache to create the ClassNode. This means the ClassNode created from this method using the same name will have a different reference
        Parameters:
        name - of the class the ClassNode is representing
        See Also:
        make(String)
      • make

        public static ClassNode make​(String name)
        Creates a ClassNode using a given class. If the name is one of the predefined ClassNodes then the corresponding ClassNode instance will be returned. If the name is null or of length 0 the dynamic type is returned
        Parameters:
        name - of the class the ClassNode is representing
      • getWrapper

        public static ClassNode getWrapper​(ClassNode cn)
        Creates a ClassNode containing the wrapper of a ClassNode of primitive type. Any ClassNode representing a primitive type should be created using the predefined types used in class. The method will check the parameter for known references of ClassNode representing a primitive type. If Reference is found, then a ClassNode will be contained that represents the wrapper class. For example for boolean, the wrapper class is java.lang.Boolean.

        If the parameter is no primitive type, the redirected ClassNode will be returned

        Parameters:
        cn - the ClassNode containing a possible primitive type
        See Also:
        make(Class), make(String)
      • isPrimitiveType

        public static boolean isPrimitiveType​(ClassNode cn)
        Test to determine if a ClassNode is a primitive type. Note: this only works for ClassNodes created using a predefined ClassNode
        Parameters:
        cn - the ClassNode containing a possible primitive type
        Returns:
        true if the ClassNode is a primitive type
        See Also:
        make(Class), make(String)
      • isStaticConstantInitializerType

        public static boolean isStaticConstantInitializerType​(ClassNode cn)
        Test to determine if a ClassNode is a type belongs to the list of types which are allowed to initialize constants directly in bytecode instead of using <cinit>

        Note: this only works for ClassNodes created using a predefined ClassNode

        Parameters:
        cn - the ClassNode to be tested
        Returns:
        true if the ClassNode is of int, float, long, double or String type
        See Also:
        make(Class), make(String)
      • isNumberType

        public static boolean isNumberType​(ClassNode cn)
      • makeReference

        public static ClassNode makeReference()
      • isCachedType

        public static boolean isCachedType​(ClassNode type)
      • isSAMType

        public static boolean isSAMType​(ClassNode type)
      • isFunctionalInterface

        public static boolean isFunctionalInterface​(ClassNode type)
      • findSAM

        public static MethodNode findSAM​(ClassNode type)
        Returns the single abstract method of a class node, if it is a SAM type, or null otherwise.
        Parameters:
        type - a type for which to search for a single abstract method
        Returns:
        the method node if type is a SAM type, null otherwise
      • getNextSuperClass

        public static ClassNode getNextSuperClass​(ClassNode clazz,
                                                  ClassNode goalClazz)
        Returns a super class or interface for a given class depending on a given target. If the target is no super class or interface, then null will be returned. For a non-primitive array type, returns an array of the componentType's super class or interface if the target is also an array.
        Parameters:
        clazz - the start class
        goalClazz - the goal class
        Returns:
        the next super class or interface