com.whitestein.lsps.vaadin.util

Class Utils

java.lang.Object

com.whitestein.lsps.vaadin.util.Utils

public class Utils
extends Object

Utility methods.

Author:

mhi

Method Summary

Modifier and Type	Method and Description
static Injector	createInjector() Creates an injector instance.
static String	getArgClasses(Object[] args) Returns a comma separated simple class names of given arguments.
static String	getLocalizedString(Locale locale, String key, Object... args) Returns localized string for given key and locale, replacing numbered tokens ({0}, {1}...) with the arguments.
static <T> T	nullSafe(T value, T defaultValue) Provides a null-safe way to access a value.
static List<RecordHolder>	unwrapVariants(Collection<Variant.RecordVariant> variants) Unwraps the record variants in the given collection to a list of record holders.

Methods inherited from class java.lang.Object

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

Method Detail

createInjector

public static Injector createInjector()

Creates an injector instance. If system property Injector.SYSTEM_PROPERTY_NAME is set, given class is instantiated, otherwise an instance of EjbRefInjector is returned.

Returns:

injector instance

getLocalizedString

public static String getLocalizedString(Locale locale,
                                        String key,
                                        Object... args)

Returns localized string for given key and locale, replacing numbered tokens ({0}, {1}...) with the arguments.

Parameters:

locale -

key - message key

args - arguments

Returns:

localized string

getArgClasses

public static String getArgClasses(Object[] args)

Returns a comma separated simple class names of given arguments.

Parameters:

args -

Returns:

a comma separated list of argument classes

nullSafe

public static <T> T nullSafe(T value,
                             T defaultValue)

Provides a null-safe way to access a value.

Type Parameters:

T -

Parameters:

value - optional

defaultValue - required

Returns:

the value or the default value if the value is null

unwrapVariants

public static List<RecordHolder> unwrapVariants(Collection<Variant.RecordVariant> variants)

Unwraps the record variants in the given collection to a list of record holders.

Parameters:

variants - the variants to unwrap

Returns:

a list of unwrapped record holders