Reflection Utilities

public class Reflections {
    /**
     * Runtime cast utility with improved type safety
     */
    public static <T> T cast(Object obj);
    
    /**
     * Checks if a class is serializable
     */
    public static boolean isSerializable(Class<?> clazz);
    
    /**
     * Extracts raw type from parameterized types
     */
    public static <T> Class<T> getRawType(Type type);
    
    /**
     * Checks if type is array type
     */
    public static boolean isArrayType(Class<?> rawType);
    
    /**
     * Checks if type is parameterized type
     */
    public static boolean isParameterizedType(Class<?> type);
}

public class Reflections {
    /**
     * Gets all declared fields in class hierarchy
     */
    public static Set<Field> getAllDeclaredFields(Class<?> clazz);
    
    /**
     * Finds field by name in class hierarchy
     */
    public static Field findDeclaredField(Class<?> clazz, String name);
    
    /**
     * Gets field value from instance
     */
    public static Object getFieldValue(Field field, Object instance);
    
    /**
     * Gets typed field value from instance
     */
    public static <T> T getFieldValue(Field field, Object instance, Class<T> expectedType);
    
    /**
     * Resolves list element type from field
     */
    public static Class<?> resolveListType(Field field, Object instance);
}

public class Reflections {
    /**
     * Checks if method exists in class
     */
    public static boolean methodExists(Class<?> clazz, String name);
    
    /**
     * Gets all declared methods in class hierarchy
     */
    public static Set<Method> getAllDeclaredMethods(Class<?> clazz);
    
    /**
     * Finds method by name and parameter types
     */
    public static Method findDeclaredMethod(Class<?> clazz, String name, Class<?>... args);
    
    /**
     * Invokes method on instance
     */
    public static Object invokeMethod(Method method, Object instance, Object... args);
    
    /**
     * Invokes method with type checking and accessibility control
     */
    public static <T> T invokeMethod(boolean setAccessible, Method method, Class<T> expectedReturnType, Object instance, Object... args);
    
    /**
     * Gets JavaBean property name from getter method
     */
    public static String getPropertyName(Method method);
}

public class Reflections {
    /**
     * Finds constructor by parameter types
     */
    public static Constructor<?> findDeclaredConstructor(Class<?> clazz, Class<?>... args);
    
    /**
     * Gets all declared constructors
     */
    public static Set<Constructor<?>> getAllDeclaredConstructors(Class<?> clazz);
    
    /**
     * Creates new instance (deprecated, use Constructor.newInstance())
     */
    @Deprecated
    public static <T> T newInstance(Class<T> fromClass);
}

public class Reflections {
    /**
     * Sets accessible flag on member
     */
    public static <A extends AccessibleObject> A setAccessible(A member);
    
    /**
     * Unsets accessible flag on member
     */
    public static <A extends AccessibleObject> A unsetAccessible(A member);
}

public class Reflections {
    /**
     * Gets annotations with specified meta-annotation
     */
    public static Set<Annotation> getAnnotationsWithMetaAnnotation(Set<Annotation> annotations, Class<? extends Annotation> metaAnnotationType);
    
    /**
     * Checks if annotations are cacheable
     */
    public static boolean isCacheable(Set<Annotation> annotations);
}

public class Reflections {
    /**
     * Loads class by name with multiple class loaders
     */
    public static <T> Class<T> classForName(String name, ClassLoader... loaders);
    
    /**
     * Gets member type (field type, method return type, etc.)
     */
    public static Class<?> getMemberType(Member member);
    
    /**
     * Builds type map from set of types
     */
    public static Map<Class<?>, Type> buildTypeMap(Set<Type> types);
}

public class Reflections {
    /**
     * Checks if class is final
     */
    public static boolean isFinal(Class<?> clazz);
    
    /**
     * Checks if member is final
     */
    public static boolean isFinal(Member member);
    
    /**
     * Checks if member is private
     */
    public static boolean isPrivate(Member member);
    
    /**
     * Checks if type is static
     */
    public static boolean isStatic(Class<?> type);
    
    /**
     * Checks if member is static
     */
    public static boolean isStatic(Member member);
    
    /**
     * Checks if member is transient
     */
    public static boolean isTransient(Member member);
    
    /**
     * Checks if method is abstract
     */
    public static boolean isAbstract(Method method);
}

public class Reflections {
    /**
     * Checks complex type assignability with generics
     */
    public static boolean isAssignableFrom(Class<?> rawType1, Type[] actualTypeArguments1, Class<?> rawType2, Type[] actualTypeArguments2);
}

public class Reflections {
    public static final Annotation[] EMPTY_ANNOTATION_ARRAY;
    public static final Object[] EMPTY_OBJECT_ARRAY;
    public static final Type[] EMPTY_TYPES;
    public static final Class<?>[] EMPTY_CLASSES;
}

public class Types {
    /**
     * Gets boxed type for primitives
     */
    public static Type boxedType(Type type);
    
    /**
     * Gets boxed class for primitive types
     */
    public static Class<?> boxedClass(Class<?> type);
    
    /**
     * Gets raw type from generic type
     */
    public static Class<?> getRawType(Type type);
    
    /**
     * Gets raw type without throwing exceptions
     */
    public static Class<?> getRawTypeNoException(Type type);
}

public class Types {
    /**
     * Gets first type argument from generic type
     */
    public static Class<?> getTypeArgument(Type genericType);
    
    /**
     * Gets type argument at specific index from parameterized type
     */
    public static Class getArgumentType(ParameterizedType pType, int index);
    
    /**
     * Resolves type variables in context of root class
     */
    public static Type resolveTypeVariables(Class<?> root, Type type);
    
    /**
     * Resolves single type variable in context of root class
     */
    public static Type resolveTypeVariable(Class<?> root, TypeVariable<?> typeVariable);
}

public class Types {
    /**
     * Gets collection element type
     */
    public static Class getCollectionBaseType(Class type, Type genericType);
    
    /**
     * Gets map key type
     */
    public static Class getMapKeyType(Type genericType);
    
    /**
     * Gets map value type  
     */
    public static Class getMapValueType(Type genericType);
}

public class Types {
    /**
     * Checks if class is assignable from parameterized type
     */
    public static boolean isA(Class clazz, ParameterizedType pType);
    
    /**
     * Gets template parameter of interface
     */
    public static Class getTemplateParameterOfInterface(Class base, Class desiredInterface);
    
    /**
     * Gets actual type arguments of interface
     */
    public static Type[] getActualTypeArgumentsOfAnInterface(Class<?> classToSearch, Class<?> interfaceToFind);
    
    /**
     * Finds parameterized types in class hierarchy
     */
    public static Type[] findParameterizedTypes(Class<?> root, Class<?> searchedFor);
}

public class Types {
    /**
     * Checks if two methods are compatible
     */
    public static boolean isCompatible(Method method, Method intfMethod);
    
    /**
     * Gets implementing method for interface method
     */
    public static Method getImplementingMethod(Class clazz, Method intfMethod);
}

public class Types {
    /**
     * Checks if type supports object from interface
     */
    public static <T> boolean supports(Class<T> type, Object object, Class<?> fromInterface);
}

public class SetAccessiblePrivilegedAction implements PrivilegedAction<Void> {
    public SetAccessiblePrivilegedAction(AccessibleObject accessibleObject);
    public Void run();
}

public class UnSetAccessiblePrivilegedAction implements PrivilegedAction<Void> {
    public UnSetAccessiblePrivilegedAction(AccessibleObject accessibleObject);
    public Void run();
}

// Get all fields in class hierarchy
Class<?> clazz = MyClass.class;
Set<Field> allFields = Reflections.getAllDeclaredFields(clazz);

// Find specific field
Field nameField = Reflections.findDeclaredField(clazz, "name");

// Access field value safely
Object instance = new MyClass();
Reflections.setAccessible(nameField);
String name = Reflections.getFieldValue(nameField, instance, String.class);

// Resolve generic field types
Field listField = Reflections.findDeclaredField(clazz, "items");
Class<?> elementType = Reflections.resolveListType(listField, instance);

// Find and invoke methods
Class<?> clazz = MyService.class;
Method method = Reflections.findDeclaredMethod(clazz, "processData", String.class, int.class);

Object service = new MyService();
String result = Reflections.invokeMethod(true, method, String.class, service, "data", 42);

// Check method existence
boolean hasMethod = Reflections.methodExists(clazz, "validate");

// Get property name from getter
Method getter = Reflections.findDeclaredMethod(clazz, "getName");
String propertyName = Reflections.getPropertyName(getter); // "name"

// Resolve collection element types
Field listField = MyClass.class.getDeclaredField("stringList");
Type fieldType = listField.getGenericType();
Class<?> elementType = Types.getCollectionBaseType(List.class, fieldType);

// Resolve map types
Field mapField = MyClass.class.getDeclaredField("stringMap");
Type mapType = mapField.getGenericType();
Class<?> keyType = Types.getMapKeyType(mapType);
Class<?> valueType = Types.getMapValueType(mapType);

// Resolve type variables
class Container<T> { 
    List<T> items; 
}
Type resolvedType = Types.resolveTypeVariables(Container.class, itemsFieldType);

// Get annotations with meta-annotations
Set<Annotation> annotations = new HashSet<>();
// ... populate annotations

Class<? extends Annotation> metaType = MyMetaAnnotation.class;
Set<Annotation> filtered = Reflections.getAnnotationsWithMetaAnnotation(annotations, metaType);

// Check if annotations are cacheable
boolean cacheable = Reflections.isCacheable(annotations);

// Load class with fallback loaders
ClassLoader[] loaders = {
    Thread.currentThread().getContextClassLoader(),
    MyClass.class.getClassLoader(),
    ClassLoader.getSystemClassLoader()
};

Class<?> loadedClass = Reflections.classForName("com.example.MyClass", loaders);

// Type checking
Class<?> rawType = Types.getRawType(someGenericType);
boolean isArray = Reflections.isArrayType(String[].class);
boolean isParameterized = Reflections.isParameterizedType(List.class);

// Find and use constructors
Constructor<?> constructor = Reflections.findDeclaredConstructor(MyClass.class, String.class, int.class);
Reflections.setAccessible(constructor);
Object instance = constructor.newInstance("test", 42);

// Get all constructors
Set<Constructor<?>> constructors = Reflections.getAllDeclaredConstructors(MyClass.class);

// Check method compatibility
Method interfaceMethod = MyInterface.class.getDeclaredMethod("process", String.class);
Method implementationMethod = MyImplementation.class.getDeclaredMethod("process", String.class);
boolean compatible = Types.isCompatible(implementationMethod, interfaceMethod);

// Find implementing method
Method impl = Types.getImplementingMethod(MyImplementation.class, interfaceMethod);

// Get interface type parameters
Type[] typeArgs = Types.getActualTypeArgumentsOfAnInterface(
    MyGenericImplementation.class, 
    MyGenericInterface.class
);

// Use privileged actions in security-managed environments
AccessibleObject member = somePrivateField;

// Set accessible with proper permissions
AccessController.doPrivileged(new SetAccessiblePrivilegedAction(member));

// Use the member
// ...

// Unset accessible when done
AccessController.doPrivileged(new UnSetAccessiblePrivilegedAction(member));

// Type boxing and conversion
Type primitiveType = int.class;
Type boxedType = Types.boxedType(primitiveType); // Integer.class
Class<?> boxedClass = Types.boxedClass(int.class); // Integer.class

// Complex assignability checking
boolean assignable = Reflections.isAssignableFrom(
    List.class, new Type[]{String.class},
    ArrayList.class, new Type[]{String.class}
);

// Build type maps for analysis
Set<Type> types = Set.of(String.class, Integer.class, List.class);
Map<Class<?>, Type> typeMap = Reflections.buildTypeMap(types);