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, boolean throwException) Get the value of the named field in the class of the given object or any of its superclasses.
static Object	getStaticFieldVal(Class<?> cls, String fieldName, boolean throwException) Get the value of the named static field in the given class or any of its superclasses.
static Object	invokeMethod(Object obj, String methodName, boolean throwException) Invoke the named method in the given object or its superclasses.
static Object	invokeMethod(Object obj, String methodName, Class<?> argType, Object arg, boolean throwException) Invoke the named method in the given object or its superclasses.
static Object	invokeStaticMethod(Class<?> cls, String methodName, boolean throwException) Invoke the named static method.
static Object	invokeStaticMethod(Class<?> cls, String methodName, Class<?> argType, Object arg, boolean throwException) Invoke the named static method.

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,
                                 boolean throwException)

Get the value of the named field in the class of the given object or any of its superclasses. If an exception is thrown while trying to read the field, and throwException is true, then IllegalArgumentException is thrown wrapping the cause, otherwise this will return null. If passed a null object, returns null unless throwException is true, then throws NullPointerException.

getStaticFieldVal

public static Object getStaticFieldVal(Class<?> cls,
                                       String fieldName,
                                       boolean throwException)

Get the value of the named static field in the given class or any of its superclasses. If an exception is thrown while trying to read the field value, and throwException is true, then IllegalArgumentException is thrown wrapping the cause, otherwise this will return null. If passed a null class reference, returns null unless throwException is true, then throws NullPointerException.

invokeMethod

public static Object invokeMethod(Object obj,
                                  String methodName,
                                  boolean throwException)

Invoke the named method in the given object or its superclasses. If an exception is thrown while trying to call the method, and throwException is true, then IllegalArgumentException is thrown wrapping the cause, otherwise this will return null. If passed a null object, returns null unless throwException is true, then throws NullPointerException.

invokeMethod

public static Object invokeMethod(Object obj,
                                  String methodName,
                                  Class<?> argType,
                                  Object arg,
                                  boolean throwException)

Invoke the named method in the given object or its superclasses. If an exception is thrown while trying to call the method, and throwException is true, then IllegalArgumentException is thrown wrapping the cause, otherwise this will return null. If passed a null object, returns null unless throwException is true, then throws NullPointerException.

invokeStaticMethod

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

Invoke the named static method. If an exception is thrown while trying to call the method, and throwException is true, then IllegalArgumentException is thrown wrapping the cause, otherwise this will return null. If passed a null class reference, returns null unless throwException is true, then throws NullPointerException.

Throws:

IllegalAccessException

IllegalArgumentException

InvocationTargetException

invokeStaticMethod

public static Object invokeStaticMethod(Class<?> cls,
                                        String methodName,
                                        Class<?> argType,
                                        Object arg,
                                        boolean throwException)

Invoke the named static method. If an exception is thrown while trying to call the method, and throwException is true, then IllegalArgumentException is thrown wrapping the cause, otherwise this will return null. If passed a null class reference, returns null unless throwException is true, then throws NullPointerException.