Package org.eclipse.epsilon.eol.util

Class ReflectionUtil

java.lang.Object

org.eclipse.epsilon.eol.util.ReflectionUtil

public class ReflectionUtil
extends Object

Method Summary

Modifier and Type	Method	Description
static Class<?>[]	discoverPublicClasses(Class<?> clazz)
static Object	executeMethod(Object obj, Method method, ModuleElement ast, Object... parameters)
static Object	executeMethod(Object obj, String methodName, Object... parameters)
static Method	findApplicableMethodOrThrow(Object obj, String methodName, Predicate<Method> criteria, Collection<?> parameters, ModuleElement ast, PrettyPrinterManager ppm)	Searches for a method matching the name and criteria for the given object, including all super methods and super-interfaces recursively.
static List<Field>	getAllInheritedInstanceFields(Class<?> klazz)
static Field	getField(Class<?> clazz, String fieldName)	Gets a field of a class using reflection by introspecting the class and its supertype(s)
static Object	getFieldValue(Object object, String fieldName)	Returns the value of a field of an object
static Method	getLegalMethod(Object obj, Method method)	This tries to find a method such that invoking via reflection won't be illegal in Java 9+
static Method	getMethodFor(Object obj, String methodName, Object[] parameters, boolean includeInheritedMethods, boolean allowContravariantConversionForParameters)
protected static String	getMethodName(Method method)
static Set<String>	getMethodNames(Object obj, boolean includeInheritedMethods)
static Method[]	getMethodsFromPublicClassesForName(Object obj, String methodName)
static boolean	hasMethods(Object obj, String methodName)
static boolean	isInstance(Class<?> clazz, Object instance)	Checks if the instance is an instance of clazz Necessary because in Java, int.class != Integer.class etc
static String	methodToString(Method method)	Returns a string representation of the method

Methods inherited from class java.lang.Object

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

Method Details

hasMethods

public static boolean hasMethods(Object obj,
 String methodName)

getMethodNames

public static Set<String> getMethodNames(Object obj,
 boolean includeInheritedMethods)

getMethodName

protected static String getMethodName(Method method)

findApplicableMethodOrThrow

public static Method findApplicableMethodOrThrow(Object obj,
 String methodName,
 Predicate<Method> criteria,
 Collection<?> parameters,
 ModuleElement ast,
 PrettyPrinterManager ppm)
                                          throws EolIllegalOperationException,
EolIllegalOperationParametersException

Searches for a method matching the name and criteria for the given object, including all super methods and super-interfaces recursively.

Parameters:

obj - The target object to look for methods on.

methodName - The name of the method to find.

criteria - Function which limits the search scope of methods.

Returns:

A method (chosen non-deterministically) which matches the criteria.

Throws:

EolIllegalOperationException - If no method matching the criteria can be found.

EolIllegalOperationParametersException - If the method parameters are invalid.

Since:

1.6

discoverPublicClasses

public static Class<?>[] discoverPublicClasses(Class<?> clazz)

Parameters:

clazz -

Returns:

Since:

1.6

getMethodsFromPublicClassesForName

public static Method[] getMethodsFromPublicClassesForName(Object obj,
 String methodName)

Parameters:

obj -

methodName -

Returns:

Since:

1.6

getMethodFor

public static Method getMethodFor(Object obj,
 String methodName,
 Object[] parameters,
 boolean includeInheritedMethods,
 boolean allowContravariantConversionForParameters)

Parameters:

allowContravariantConversionForParameters - when false, parameters will have exactly the same class as the arguments to the returned method when true, parameters may have a type that is more specific than the arguments to the returned method

executeMethod

public static Object executeMethod(Object obj,
 String methodName,
 Object... parameters)
                            throws Throwable

Throws:

Throwable

executeMethod

public static Object executeMethod(Object obj,
 Method method,
 ModuleElement ast,
 Object... parameters)
                            throws EolRuntimeException

Throws:

EolRuntimeException

getLegalMethod

public static Method getLegalMethod(Object obj,
 Method method)

This tries to find a method such that invoking via reflection won't be illegal in Java 9+

Parameters:

obj -

method -

Returns:

Since:

1.6

methodToString

public static String methodToString(Method method)

Returns a string representation of the method

Parameters:

method -

Returns:

getFieldValue

public static Object getFieldValue(Object object,
 String fieldName)

Returns the value of a field of an object

Parameters:

object -

fieldName -

Returns:

getField

public static Field getField(Class<?> clazz,
 String fieldName)

Gets a field of a class using reflection by introspecting the class and its supertype(s)

Parameters:

clazz -

fieldName -

Returns:

isInstance

public static boolean isInstance(Class<?> clazz,
 Object instance)

Checks if the instance is an instance of clazz Necessary because in Java, int.class != Integer.class etc

Parameters:

clazz -

instance -

Returns:

getAllInheritedInstanceFields

public static List<Field> getAllInheritedInstanceFields(Class<?> klazz)