Class JDOImplHelper.Meta

java.lang.Object

javax.jdo.spi.JDOImplHelper.Meta

Enclosing class:

JDOImplHelper

static class JDOImplHelper.Meta
extends Object

This is a helper class to manage metadata per persistence-capable class. The information is used at runtime to provide field names and field types to the JDO Model. This is the value of the HashMap which relates the PersistenceCapable Class as a key to the metadata.

Version:

2.1

Field Summary

Fields

Modifier and Type	Field	Description
(package private) byte[]	fieldFlags	This is an array of field flags used for the Model at runtime.
(package private) String[]	fieldNames	This is an array of field names used for the Model at runtime.
(package private) Class[]	fieldTypes	This is an array of field types used for the Model at runtime.
(package private) PersistenceCapable	pc	This is an instance of PersistenceCapable, used at runtime to create new instances.
(package private) Class	persistenceCapableSuperclass	This is the Class instance of the PersistenceCapable superclass.

Constructor Summary

Constructors

Constructor	Description
Meta(String[] fieldNames, Class[] fieldTypes, byte[] fieldFlags, Class persistenceCapableSuperclass, PersistenceCapable pc)	Construct an instance of Meta.

Method Summary

Modifier and Type	Method	Description
(package private) byte[]	getFieldFlags()	Get the field types from the metadata.
(package private) String[]	getFieldNames()	Get the field names from the metadata.
(package private) Class[]	getFieldTypes()	Get the field types from the metadata.
(package private) PersistenceCapable	getPC()	Get an instance of the PersistenceCapable class.
(package private) Class	getPersistenceCapableSuperclass()	Return the PersistenceCapable superclass.
String	toString()	Return the string form of the metadata.

Methods inherited from class Object

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

Field Details

fieldNames

String[] fieldNames

This is an array of field names used for the Model at runtime. The field is passed by the static class initialization.

fieldTypes

Class[] fieldTypes

This is an array of field types used for the Model at runtime. The field is passed by the static class initialization.

fieldFlags

byte[] fieldFlags

This is an array of field flags used for the Model at runtime. The field is passed by the static class initialization.

persistenceCapableSuperclass

Class persistenceCapableSuperclass

This is the Class instance of the PersistenceCapable superclass.

pc

PersistenceCapable pc

This is an instance of PersistenceCapable, used at runtime to create new instances.

Constructor Details

Meta

Meta(String[] fieldNames,
 Class[] fieldTypes,
 byte[] fieldFlags,
 Class persistenceCapableSuperclass,
 PersistenceCapable pc)

Construct an instance of Meta.

Parameters:

fieldNames - An array of String

fieldTypes - An array of Class

fieldFlags - an array of int

persistenceCapableSuperclass - the most immediate PersistenceCapable superclass

pc - An instance of the PersistenceCapable class

Method Details

getFieldNames

String[] getFieldNames()

Get the field names from the metadata.

Returns:

the array of field names.

getFieldTypes

Class[] getFieldTypes()

Get the field types from the metadata.

Returns:

the array of field types.

getFieldFlags

byte[] getFieldFlags()

Get the field types from the metadata.

Returns:

the array of field types.

getPersistenceCapableSuperclass

Class getPersistenceCapableSuperclass()

Return the PersistenceCapable superclass.

Returns:

the PersistenceCapable superclass

getPC

PersistenceCapable getPC()

Get an instance of the PersistenceCapable class.

Returns:

an instance of the PersistenceCapable Class.

toString

public String toString()

Return the string form of the metadata.

Overrides:

toString in class Object

Returns:

the string form