io.github.lukehutch.fastclasspathscanner.utils

Class ReflectionUtils

java.lang.Object

io.github.lukehutch.fastclasspathscanner.utils.ReflectionUtils

public class ReflectionUtils
extends Object

Reflection utility methods that can be used by ClassLoaderHandlers.

Constructor Summary

Constructors

Constructor and Description
ReflectionUtils()

Method Summary

Modifier and Type	Method and Description
static Object	getFieldVal(Object obj, String fieldName) Get the named field in the given object or any of its superclasses.
static Object	invokeMethod(Object obj, String methodName) Invoke the named method in the given object or its superclasses.
static Object	invokeMethod(Object obj, String methodName, Class<?> argType, Object arg) Invoke the named method in the given object or its superclasses.
static Object	invokeStaticMethod(Class<?> cls, String methodName) Invoke the named static method.
static Object	invokeStaticMethod(Class<?> cls, String methodName, Class<?> argType, Object arg) Invoke the named static method.
static String	modifiersToString(int modifiers, boolean isMethod) Convert field or method modifiers into a string representation, e.g.
static List<String>	parseTypeDescriptor(String typeDescriptor) Parse a type descriptor into a type or list of types.

Methods inherited from class java.lang.Object

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

Constructor Detail

ReflectionUtils

public ReflectionUtils()

Method Detail

getFieldVal

public static Object getFieldVal(Object obj,
                                 String fieldName)
                          throws IllegalArgumentException,
                                 IllegalAccessException,
                                 NoSuchFieldException,
                                 SecurityException

Get the named field in the given object or any of its superclasses.

Throws:

IllegalArgumentException

IllegalAccessException

NoSuchFieldException

SecurityException

invokeMethod

public static Object invokeMethod(Object obj,
                                  String methodName)
                           throws IllegalAccessException,
                                  IllegalArgumentException,
                                  InvocationTargetException

Invoke the named method in the given object or its superclasses.

Throws:

IllegalAccessException

IllegalArgumentException

InvocationTargetException

invokeMethod

public static Object invokeMethod(Object obj,
                                  String methodName,
                                  Class<?> argType,
                                  Object arg)
                           throws IllegalAccessException,
                                  IllegalArgumentException,
                                  InvocationTargetException

Invoke the named method in the given object or its superclasses.

Throws:

IllegalAccessException

IllegalArgumentException

InvocationTargetException

invokeStaticMethod

public static Object invokeStaticMethod(Class<?> cls,
                                        String methodName)
                                 throws IllegalAccessException,
                                        IllegalArgumentException,
                                        InvocationTargetException

Invoke the named static method.

Throws:

IllegalAccessException

IllegalArgumentException

InvocationTargetException

invokeStaticMethod

public static Object invokeStaticMethod(Class<?> cls,
                                        String methodName,
                                        Class<?> argType,
                                        Object arg)
                                 throws IllegalAccessException,
                                        IllegalArgumentException,
                                        InvocationTargetException

Invoke the named static method.

Throws:

IllegalAccessException

IllegalArgumentException

InvocationTargetException

modifiersToString

public static String modifiersToString(int modifiers,
                                       boolean isMethod)

Convert field or method modifiers into a string representation, e.g. "public static final".

parseTypeDescriptor

public static List<String> parseTypeDescriptor(String typeDescriptor)

Parse a type descriptor into a type or list of types. For a single type (for a field), returns a list with one item. For a method, returns a list of types, with the first N-1 items corresponding to the argument types, and the last item corresponding to the method return type.