javax.jdo.spi
Class JDOImplHelper.Meta

java.lang.Object
  |
  +--javax.jdo.spi.JDOImplHelper.Meta

Enclosing class:

JDOImplHelper

static class JDOImplHelper.Meta

extends java.lang.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.

Field Summary

(package private) byte[]	fieldFlags This is an array of field flags used for the Model at runtime.
(package private) java.lang.String[]	fieldNames This is an array of field names used for the Model at runtime.
(package private) java.lang.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) java.lang.Class	persistenceCapableSuperclass This is the Class instance of the PersistenceCapable superclass.

Constructor Summary

(package private)

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

Method Summary

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

Methods inherited from class java.lang.Object

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

Field Detail

fieldNames

java.lang.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

java.lang.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

java.lang.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 Detail

JDOImplHelper.Meta

JDOImplHelper.Meta(java.lang.String[] fieldNames,
                   java.lang.Class[] fieldTypes,
                   byte[] fieldFlags,
                   java.lang.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 Detail

getFieldNames

java.lang.String[] getFieldNames()

Get the field names from the metadata.

Returns:

the array of field names.

getFieldTypes

java.lang.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

java.lang.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 java.lang.String toString()

Return the string form of the metadata.

Overrides:

toString in class java.lang.Object

Returns:

the string form