org.nuiton.util
Class ObjectUtil

java.lang.Object
  org.nuiton.util.ObjectUtil

public class ObjectUtil
extends java.lang.Object

Field Summary

protected static java.lang.Integer	ZERO
protected static java.lang.Byte	ZEROB
protected static java.lang.Character	ZEROC
protected static java.lang.Double	ZEROD
protected static java.lang.Float	ZEROF
protected static java.lang.Long	ZEROL

Method Summary

static java.lang.Object	call(java.lang.Object o, java.lang.reflect.Method m, java.lang.String... params) Call method m with params as String.
protected static java.lang.Object	convert(java.lang.String v, java.lang.Class<?> clazz)
static java.lang.Object	create(java.lang.String classnameAndProperties) Create new object from string like org.nuiton.Toto(name=machine, int=10) where machine and int is properties on org.nuiton.Toto object.
static <T> java.util.List<java.lang.reflect.Constructor<T>>	getConstructor(java.lang.Class<T> clazz, int paramNumber) Get all constructors that support paramNumber as parameters numbers.
static java.util.List<java.lang.reflect.Method>	getMethod(java.lang.Class<?> clazz, java.lang.String methodName, boolean ignoreCase) Get all methods with name given in argument without check parameters
static java.lang.Object	getNullValue(java.lang.Class<?> type) Obtains the null value for the given type (works too with primitive types).
static boolean	isNullValue(boolean value)
static boolean	isNullValue(byte value)
static boolean	isNullValue(char value)
static boolean	isNullValue(double value)
static boolean	isNullValue(float value)
static boolean	isNullValue(int value)
static boolean	isNullValue(java.lang.Object value) Tests if the given value is null according to default value for primitive types if nedded.
static <T> T	newInstance(java.lang.Class<T> clazz, java.lang.String... params) Create new instance of clazz, call constructor with params as String.
static java.lang.Object	newInstance(java.lang.String constructorWithParams)
static java.lang.Object	toObject(boolean b) Method toObject transform a boolean to a Boolean object
static java.lang.Object	toObject(byte b) Method toObject transform a byte to a Byte Object
static java.lang.Object	toObject(char c) Method toObject transform a char to a Character Object
static java.lang.Object	toObject(double d) Method toObject transform a double to a Double object
static java.lang.Object	toObject(float f) Method toObject transform a float to a Float Object
static java.lang.Object	toObject(int i) Method toObject transform an int to an Integer object
static java.lang.Object	toObject(long l) Method toObject transform a long to a Long object
static java.lang.Object	toObject(java.lang.Object o) Method toObject
static java.lang.Object	toObject(short s) Method toObject transform a short to a Short object

Methods inherited from class java.lang.Object

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

Field Detail

ZERO

protected static final java.lang.Integer ZERO

ZEROC

protected static final java.lang.Character ZEROC

ZEROF

protected static final java.lang.Float ZEROF

ZEROL

protected static final java.lang.Long ZEROL

ZEROD

protected static final java.lang.Double ZEROD

ZEROB

protected static final java.lang.Byte ZEROB

Method Detail

create

public static java.lang.Object create(java.lang.String classnameAndProperties)
                               throws java.lang.ClassNotFoundException,
                                      java.lang.InstantiationException,
                                      java.lang.IllegalAccessException,
                                      java.lang.reflect.InvocationTargetException,
                                      java.lang.NoSuchMethodException

Create new object from string like org.nuiton.Toto(name=machine, int=10) where machine and int is properties on org.nuiton.Toto object. Conversion between 10 in string and 10 as integer as automaticaly done For String property you can use ex:

name="my string with , in string"

name='my string with , in string'

Parameters:

classnameAndProperties -

Returns:

the instanciated object

Throws:

java.lang.ClassNotFoundException

java.lang.IllegalAccessException

java.lang.InstantiationException

java.lang.NoSuchMethodException

java.lang.reflect.InvocationTargetException

convert

protected static java.lang.Object convert(java.lang.String v,
                                          java.lang.Class<?> clazz)

call

public static java.lang.Object call(java.lang.Object o,
                                    java.lang.reflect.Method m,
                                    java.lang.String... params)
                             throws java.lang.IllegalAccessException,
                                    java.lang.IllegalArgumentException,
                                    java.lang.reflect.InvocationTargetException,
                                    java.lang.InstantiationException

Call method m with params as String. Each param is converted to required type for method with beanutils converter

Parameters:

o - object where method must be call

m - method to call

params - parameters for method call

Returns:

returned method's value

Throws:

java.lang.IllegalAccessException

java.lang.IllegalArgumentException

java.lang.reflect.InvocationTargetException

java.lang.InstantiationException

getMethod

public static java.util.List<java.lang.reflect.Method> getMethod(java.lang.Class<?> clazz,
                                                                 java.lang.String methodName,
                                                                 boolean ignoreCase)

Get all methods with name given in argument without check parameters

Parameters:

clazz -

methodName - method name to search

ignoreCase - if true, ignore difference in method name case

Returns:

list of detected methods

newInstance

public static java.lang.Object newInstance(java.lang.String constructorWithParams)
                                    throws java.lang.ClassNotFoundException

Throws:

java.lang.ClassNotFoundException

newInstance

public static <T> T newInstance(java.lang.Class<T> clazz,
                                java.lang.String... params)
                     throws java.lang.IllegalArgumentException

Create new instance of clazz, call constructor with params as String. Each param is converted to required type for constructor with beanutils converter, first constructor that permit instanciation is used

Type Parameters:

T - type to instanciate

Parameters:

clazz - class to instanciate

params - parameters for constructor call

Returns:

new instance of clazz

Throws:

java.lang.IllegalArgumentException

getConstructor

public static <T> java.util.List<java.lang.reflect.Constructor<T>> getConstructor(java.lang.Class<T> clazz,
                                                                                  int paramNumber)

Get all constructors that support paramNumber as parameters numbers. Varargs is supported

Type Parameters:

T - le type de la classe a inspecter

Parameters:

clazz - la classe sur lequel rechercher le constructeur

paramNumber - le nombre de parametre souhaite pour le constructeur, -1 indique que tous les constructeur sont souhaite.

Returns:

list of constructors

toObject

public static java.lang.Object toObject(java.lang.Object o)

Method toObject

Parameters:

o - Object to transform

Returns:

the same object

toObject

public static java.lang.Object toObject(char c)

Method toObject transform a char to a Character Object

Parameters:

c - the char to transform

Returns:

the Charactere object corresponding

toObject

public static java.lang.Object toObject(byte b)

Method toObject transform a byte to a Byte Object

Parameters:

b - the byte to transform

Returns:

the byte object corresponding

toObject

public static java.lang.Object toObject(short s)

Method toObject transform a short to a Short object

Parameters:

s - the short to transform

Returns:

the Short object corresponding

toObject

public static java.lang.Object toObject(int i)

Method toObject transform an int to an Integer object

Parameters:

i - the int to transform

Returns:

the Integer Object corresponding

toObject

public static java.lang.Object toObject(long l)

Method toObject transform a long to a Long object

Parameters:

l - the long to transform

Returns:

the Long Object corresponding

toObject

public static java.lang.Object toObject(float f)

Method toObject transform a float to a Float Object

Parameters:

f - the float to transform

Returns:

the Float Object corresponding

toObject

public static java.lang.Object toObject(double d)

Method toObject transform a double to a Double object

Parameters:

d - the double to transform

Returns:

the Double object corresponding

toObject

public static java.lang.Object toObject(boolean b)

Method toObject transform a boolean to a Boolean object

Parameters:

b - the boolean to transform

Returns:

the Boolean object corresponding

getNullValue

public static java.lang.Object getNullValue(java.lang.Class<?> type)

Obtains the null value for the given type (works too with primitive types).

Parameters:

type - the type to test

Returns:

the null value or default value for primitive types

Since:

1.1.5

isNullValue

public static boolean isNullValue(java.lang.Object value)

Tests if the given value is null according to default value for primitive types if nedded.

Parameters:

value - the value to test

Returns:

true if value is null or default value on a primitive

Since:

1.1.5

isNullValue

public static boolean isNullValue(boolean value)

isNullValue

public static boolean isNullValue(byte value)

isNullValue

public static boolean isNullValue(int value)

isNullValue

public static boolean isNullValue(char value)

isNullValue

public static boolean isNullValue(float value)

isNullValue

public static boolean isNullValue(double value)