Package javax.jdo.spi

Class 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

      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) 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

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

    • Method Summary

      All Methods Instance Methods Concrete Methods 
      Modifier and Type Method Description
      (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

      • Meta

        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