org.apache.derby.iapi.services.loader

Class ClassInfo

java.lang.Object

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

All Implemented Interfaces:

InstanceGetter

public class ClassInfo
extends java.lang.Object
implements InstanceGetter

Field Summary

Fields

Modifier and Type	Field and Description
private java.lang.Class	clazz
private java.lang.reflect.Constructor	noArgConstructor
private static java.lang.Object[]	noArguments
private static java.lang.Class[]	noParameters
private boolean	useConstructor

Constructor Summary

Constructors

Constructor and Description
ClassInfo(java.lang.Class clazz)

Method Summary

Methods

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

Methods inherited from class java.lang.Object

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

Field Detail

noParameters

private static final java.lang.Class[] noParameters

noArguments

private static final java.lang.Object[] noArguments

clazz

private final java.lang.Class clazz

useConstructor

private boolean useConstructor

noArgConstructor

private java.lang.reflect.Constructor noArgConstructor

Constructor Detail

ClassInfo

public ClassInfo(java.lang.Class clazz)

Method Detail

getClassName

public final java.lang.String getClassName()

Return the name of this class.

getClassObject

public final java.lang.Class getClassObject()

Return the class object for this class.

getNewInstance

public java.lang.Object getNewInstance()
                                throws java.lang.InstantiationException,
                                       java.lang.IllegalAccessException,
                                       java.lang.reflect.InvocationTargetException

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:

java.lang.InstantiationException - Zero arg constructor can not be executed

java.lang.IllegalAccessException - Class or zero arg constructor is not public.

java.lang.reflect.InvocationTargetException - Exception throw in zero-arg constructor.