Package org.frankframework.util

Class ClassUtils

java.lang.Object

org.frankframework.util.ClassUtils

public class ClassUtils
extends Object

A collection of class management utility methods.

Author:

Johan Verrips

Method Summary

Modifier and Type	Method	Description
static String	classNameOf(Object o)	returns the className of the object, like nameOf(Object), but without [name] suffix for a HasName.
static <T> T	convertToType(Class<T> type, String value)	Converts the String value to the supplied type.
static Map<String,Object>	getClassInfo(Class<?> clazz, ClassLoader classLoader)
static List<Object>	getClassInfoList(Class<?> clazz)
static Constructor<?>	getConstructorOnType(Class<?> clas, Class<?>[] parameterTypes)	Retrieves the constructor of a class, based on the parameters
static Object	getDeclaredFieldValue(Object o, Class<?> c, String name)
static Object	getDeclaredFieldValue(Object o, String name)
static URL	getResourceURL(String resource)	Attempts to locate the resource, first on the local class-path, if no match, it attempts to find the resource as file-path.
static Object	invokeGetter(Object o, String name, boolean forceAccess)
static void	invokeSetter(Object bean, Method method, String valueToSet)	Throws IllegalArgumentException if the argument type is incompatible Throws IllegalStateException if the argument cannot be set on the target bean
static void	invokeSetter(Object o, String name, Object value)
static void	invokeSetter(Object o, String name, Object value, Class<?> clazz)
static boolean	isClassPresent(String className)
static Class<?>	loadClass(String className)	Load a class given its name.
static String	nameOf(Object o)	returns the className of the object, without the package name.
static <T> T	newInstance(Class<T> clazz)
static <T> T	newInstance(String className, Class<T> expectedType)	Create a new instance given a class name.

Methods inherited from class java.lang.Object

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

Method Details

getResourceURL

@Nullable
public static URL getResourceURL(String resource)
                          throws FileNotFoundException

Attempts to locate the resource, first on the local class-path, if no match, it attempts to find the resource as file-path.

Throws:

FileNotFoundException - in case the resource name is invalid

getConstructorOnType

public static Constructor<?> getConstructorOnType(Class<?> clas,
 Class<?>[] parameterTypes)
                                           throws NoSuchMethodException

Retrieves the constructor of a class, based on the parameters

Throws:

NoSuchMethodException

newInstance

public static <T> T newInstance(String className,
 Class<T> expectedType)
                         throws ReflectiveOperationException,
SecurityException

Create a new instance given a class name. The constructor of the class does NOT have parameters.

Parameters:

className - The class name to load

expectedType - The class type to expect

Returns:

A new instance

Throws:

ReflectiveOperationException - If an instantiation error occurs

SecurityException - If a security violation occurs

newInstance

public static <T> T newInstance(Class<T> clazz)
                         throws ReflectiveOperationException,
SecurityException

Throws:

ReflectiveOperationException

SecurityException

loadClass

public static Class<?> loadClass(String className)
                          throws ClassNotFoundException

Load a class given its name. We want to use a known ClassLoader.

Parameters:

className - A class name

Returns:

The class pointed to by className

Throws:

ClassNotFoundException - If a loading error occurs

nameOf

@Nonnull
public static String nameOf(Object o)

returns the className of the object, without the package name.

classNameOf

@Nonnull
public static String classNameOf(Object o)

returns the className of the object, like nameOf(Object), but without [name] suffix for a HasName.

isClassPresent

public static boolean isClassPresent(String className)

invokeSetter

public static void invokeSetter(Object bean,
 Method method,
 String valueToSet)

Throws IllegalArgumentException if the argument type is incompatible Throws IllegalStateException if the argument cannot be set on the target bean

convertToType

@Nullable
public static <T> T convertToType(Class<T> type,
 String value)
                           throws IllegalArgumentException

Converts the String value to the supplied type.

Parameters:

type - to convert the input value to

Returns:

The converted value, of type <T>.

Throws:

IllegalArgumentException - (or NumberFormatException) when the value cannot be converted to the given type T.

invokeSetter

public static void invokeSetter(Object o,
 String name,
 Object value)
                         throws SecurityException,
ReflectiveOperationException,
IllegalArgumentException

Throws:

SecurityException

ReflectiveOperationException

IllegalArgumentException

invokeSetter

public static void invokeSetter(Object o,
 String name,
 Object value,
 Class<?> clazz)
                         throws SecurityException,
ReflectiveOperationException,
IllegalArgumentException

Throws:

SecurityException

ReflectiveOperationException

IllegalArgumentException

invokeGetter

public static Object invokeGetter(Object o,
 String name,
 boolean forceAccess)
                           throws SecurityException,
ReflectiveOperationException,
IllegalArgumentException

Throws:

SecurityException

ReflectiveOperationException

IllegalArgumentException

getDeclaredFieldValue

public static Object getDeclaredFieldValue(Object o,
 Class<?> c,
 String name)
                                    throws IllegalArgumentException,
SecurityException,
NoSuchFieldException

Throws:

IllegalArgumentException

SecurityException

NoSuchFieldException

getDeclaredFieldValue

public static Object getDeclaredFieldValue(Object o,
 String name)
                                    throws IllegalArgumentException,
SecurityException,
NoSuchFieldException

Throws:

IllegalArgumentException

SecurityException

NoSuchFieldException

getClassInfoList

public static List<Object> getClassInfoList(Class<?> clazz)

getClassInfo

public static Map<String,Object> getClassInfo(Class<?> clazz,
 ClassLoader classLoader)