de.alpharogroup.reflection

Class ReflectionExtensions

java.lang.Object

de.alpharogroup.reflection.ReflectionExtensions

public final class ReflectionExtensions
extends Object

The class ReflectionExtensions.

Constructor Summary

Constructors

Constructor and Description
ReflectionExtensions()

Method Summary

Modifier and Type	Method and Description
static Field	getDeclaredField(Class<?> cls, String fieldName) Gets the Field that match to the given field name that exists in the given class.
static <T> Field	getDeclaredField(T object, String fieldName) Gets the Field that match to the given field name that exists in the given object.
static List<String>	getFieldNames(Class<?> cls) Gets all fieldnames from the given class as an String array.
static String[]	getMethodNames(Class<?> cls) Gets all methodnames from the given class as an String array.
static Map<String,String>	getMethodNamesWithPrefixFromFieldNames(List<String> fieldNames, String prefix) Generates a Map with the fieldName as key and the method as value.
static List<String>	getModifiers(Field field) Gets the modifiers from the given Field as a list of String objects.
static <T> T	getNewInstance(T obj) Deprecated. use instead newInstance(Object)
static <T> T	newInstance(Class<T> clazz) Creates a new instance from the same type as the given Class.
static <T> T	newInstance(T obj) Creates a new instance from the same type as the given object.

Methods inherited from class java.lang.Object

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

Constructor Detail

ReflectionExtensions

public ReflectionExtensions()

Method Detail

getFieldNames

public static List<String> getFieldNames(Class<?> cls)

Gets all fieldnames from the given class as an String array.

Parameters:

cls - The class object to get the fieldnames.

Returns:

Gets all fieldnames from the given class as an String array.

getMethodNames

public static String[] getMethodNames(Class<?> cls)

Gets all methodnames from the given class as an String array.

Parameters:

cls - The class object to get the methodnames.

Returns:

Gets all methodnames from the given class as an String array.

getMethodNamesWithPrefixFromFieldNames

public static final Map<String,String> getMethodNamesWithPrefixFromFieldNames(List<String> fieldNames,
                                                                              String prefix)

Generates a Map with the fieldName as key and the method as value. Concatenates the given prefix and the fieldname and puts the result into the map.

Parameters:

fieldNames - A list with the fieldNames.

prefix - The prefix for the methodname.

Returns:

the method names with prefix from field names

getModifiers

public static List<String> getModifiers(Field field)

Gets the modifiers from the given Field as a list of String objects.

Parameters:

field - The field to get the modifiers.

Returns:

A list with the modifiers as String objects from the given Field.

getNewInstance

@Deprecated
public static <T> T getNewInstance(T obj)
                                        throws ClassNotFoundException,
                                               InstantiationException,
                                               IllegalAccessException

Deprecated. use instead newInstance(Object)

Creates a new instance from the same type as the given object.

Type Parameters:

T - the generic type of the given object

Parameters:

obj - the obj

Returns:

the new instance

Throws:

ClassNotFoundException - the class not found exception

InstantiationException - the instantiation exception

IllegalAccessException - the illegal access exception

newInstance

public static <T> T newInstance(T obj)
                         throws InstantiationException,
                                IllegalAccessException,
                                ClassNotFoundException

Creates a new instance from the same type as the given object.

Type Parameters:

T - the generic type

Parameters:

obj - the obj

Returns:

the new instance

Throws:

ClassNotFoundException - the class not found exception

InstantiationException - the instantiation exception

IllegalAccessException - the illegal access exception

newInstance

public static <T> T newInstance(Class<T> clazz)
                         throws InstantiationException,
                                IllegalAccessException,
                                ClassNotFoundException

Creates a new instance from the same type as the given Class.

Type Parameters:

T - the generic type

Parameters:

clazz - the Class object

Returns:

the new instance

Throws:

ClassNotFoundException - the class not found exception

InstantiationException - the instantiation exception

IllegalAccessException - the illegal access exception

getDeclaredField

public static <T> Field getDeclaredField(T object,
                                         String fieldName)
                                  throws NoSuchFieldException,
                                         SecurityException

Gets the Field that match to the given field name that exists in the given object.

Type Parameters:

T - the generic type

Parameters:

object - the object

fieldName - the field name

Returns:

the declared field

Throws:

NoSuchFieldException - is thrown if no such field exists.

SecurityException - is thrown if a security manager says no.

getDeclaredField

public static Field getDeclaredField(Class<?> cls,
                                     String fieldName)
                              throws NoSuchFieldException,
                                     SecurityException

Gets the Field that match to the given field name that exists in the given class.

Parameters:

cls - the cls

fieldName - the field name

Returns:

the declared field

Throws:

NoSuchFieldException - is thrown if no such field exists.

SecurityException - is thrown if a security manager says no.