Package org.cyclos.server.utils

Class ClassHelper

java.lang.Object

org.cyclos.server.utils.ClassHelper

public class ClassHelper
extends Object

Helper methods for handling classes

Constructor Summary

Constructors

Constructor	Description
ClassHelper()

Method Summary

Modifier and Type	Method	Description
static <T> T	convert(Object object, Class<T> type)	Converts a bean, handling both getters / setters and public fields
static Map<String,Object>	describe(Object object)	Reads all properties and public fields from the given object, returning an empty map for null input
static void	fill(Object object, Map<String,Object> values)	Sets each property / public field in the map, ignoring errors
static Class<?>	forName(String name)	Returns the class for the given name, wrapping any exceptions in an IllegalStateException
static <T> T	instantiate(Class<T> type)	Instantiates a bean of the given class, using the default constructor
static <T> T	instantiate(Class<T> type, Supplier<T> supplier)	Instantiates a bean of the given class, using the default constructor or from the given supplier if an instantiate error occurs
static <T,D extends T> T	instantiateDynamic(Class<T> expectedType, String classProperty, Class<D> defaultType)	Instantiates a class, reading the class name from the environment, then a system property, then using a default type

Methods inherited from class java.lang.Object

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

Constructor Detail

ClassHelper

public ClassHelper()

Method Detail

convert

public static <T> T convert(Object object,
                            Class<T> type)

Converts a bean, handling both getters / setters and public fields

describe

public static Map<String,Object> describe(Object object)

Reads all properties and public fields from the given object, returning an empty map for null input

fill

public static void fill(Object object,
                        Map<String,Object> values)

Sets each property / public field in the map, ignoring errors

forName

public static Class<?> forName(String name)

Returns the class for the given name, wrapping any exceptions in an IllegalStateException

instantiate

public static <T> T instantiate(Class<T> type)

Instantiates a bean of the given class, using the default constructor

Throws:

IllegalStateException - When there was a checked exception (used as cause)

instantiate

public static <T> T instantiate(Class<T> type,
                                Supplier<T> supplier)

Instantiates a bean of the given class, using the default constructor or from the given supplier if an instantiate error occurs

instantiateDynamic

public static <T,D extends T> T instantiateDynamic(Class<T> expectedType,
                                                         String classProperty,
                                                         Class<D> defaultType)
                                                  throws Exception

Instantiates a class, reading the class name from the environment, then a system property, then using a default type

Throws:

Exception