Class ClassInfo

java.lang.Object

org.apache.derby.iapi.services.loader.ClassInfo

All Implemented Interfaces:

InstanceGetter

public class ClassInfo
extends Object
implements InstanceGetter

Field Summary

Fields

Modifier and Type	Field	Description
private final Class<?>	clazz
private Constructor	noArgConstructor
private static final Object[]	noArguments
private static final Class[]	noParameters
private boolean	useConstructor

Constructor Summary

Constructors

Constructor	Description
ClassInfo(Class<?> clazz)

Method Summary

Modifier and Type	Method	Description
final String	getClassName()	Return the name of this class.
final Class	getClassObject()	Return the class object for this class.
Object	getNewInstance()	Create an instance of this class.

Methods inherited from class Object

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

Field Details

noParameters

private static final Class[] noParameters

noArguments

private static final Object[] noArguments

clazz

private final Class<?> clazz

useConstructor

private boolean useConstructor

noArgConstructor

private Constructor noArgConstructor

Constructor Details

ClassInfo

public ClassInfo(Class<?> clazz)

Method Details

getClassName

public final String getClassName()

Return the name of this class.

getClassObject

public final Class getClassObject()

Return the class object for this class.

getNewInstance

public Object getNewInstance()
                      throws InstantiationException,
IllegalAccessException,
InvocationTargetException,
NoSuchMethodException

Create an instance of this class. Assumes that clazz has already been initialized. Optimizes Class.newInstance() by caching and using the no-arg Constructor directly. Class.newInstance() looks up the constructor each time.

Specified by:

getNewInstance in interface InstanceGetter

Throws:

InstantiationException - Zero arg constructor can not be executed

IllegalAccessException - Class or zero arg constructor is not public.

InvocationTargetException - Exception throw in zero-arg constructor.

NoSuchMethodException