org.exoplatform.social.common.service.utils

Class ObjectHelper

java.lang.Object

org.exoplatform.social.common.service.utils.ObjectHelper

public class ObjectHelper
extends Object

Constructor Summary

Constructors

Constructor and Description
ObjectHelper()

Method Summary

Methods

Modifier and Type	Method and Description
static String	asString(Object[] objects) Turns the given object arrays into a meaningful string
static <T> T	cast(Class<T> toType, Object value) Converts the given value to the required type or throw a meaningful exception
static Class<?>	convertPrimitiveTypeToWrapperType(Class<?> type) Converts primitive types such as int to its wrapper type like Integer
static Iterator<Throwable>	createExceptionIterator(Throwable exception) Creates an iterator to walk the exception from the bottom up (the last caused by going upwards to the root exception).
static <T> T	getException(Class<T> type, Throwable exception) Retrieves the given exception type from the exception.
static boolean	isAssignableFrom(Class<?> a, Class<?> b) Returns true if a class is assignable from another class like the Class.isAssignableFrom(Class) method but which also includes coercion between primitive types to deal with Java 5 primitive type wrapping
static boolean	isPrimitiveArrayType(Class<?> clazz) Returns if the given clazz type is a Java primitive array type.

Methods inherited from class java.lang.Object

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

Constructor Detail

ObjectHelper

public ObjectHelper()

Method Detail

getException

public static <T> T getException(Class<T> type,
                 Throwable exception)

Retrieves the given exception type from the exception.

Is used to get the caused exception that typically have been wrapped in some sort of Camel wrapper exception

The strategy is to look in the exception hierarchy to find the first given cause that matches the type. Will start from the bottom (the real cause) and walk upwards.

Parameters:

type - the exception type wanted to retrieve

exception - the caused exception

Returns:

the exception found (or null if not found in the exception hierarchy)

createExceptionIterator

public static Iterator<Throwable> createExceptionIterator(Throwable exception)

Creates an iterator to walk the exception from the bottom up (the last caused by going upwards to the root exception).

Parameters:

exception - the exception

Returns:

the iterator

asString

public static String asString(Object[] objects)

Turns the given object arrays into a meaningful string

Parameters:

objects - an array of objects or null

Returns:

a meaningful string

isAssignableFrom

public static boolean isAssignableFrom(Class<?> a,
                       Class<?> b)

Returns true if a class is assignable from another class like the Class.isAssignableFrom(Class) method but which also includes coercion between primitive types to deal with Java 5 primitive type wrapping

isPrimitiveArrayType

public static boolean isPrimitiveArrayType(Class<?> clazz)

Returns if the given clazz type is a Java primitive array type.

Parameters:

clazz - the Java type to be checked

Returns:

true if the given type is a Java primitive array type

cast

public static <T> T cast(Class<T> toType,
         Object value)

Converts the given value to the required type or throw a meaningful exception

convertPrimitiveTypeToWrapperType

public static Class<?> convertPrimitiveTypeToWrapperType(Class<?> type)

Converts primitive types such as int to its wrapper type like Integer