Class PrimaryKeyGenerator

java.lang.Object
org.datanucleus.enhancer.PrimaryKeyGenerator
public class PrimaryKeyGenerator extends Object
Class to handle the generation of a PK class for a persistable class. The primary key class is generated as its own class, rather than as an inner class of the original class. NOTE: This will only currently handle persistable fields. If you require persistable properties then get the code and extend this.

  • Field Details

    • cmd

      final AbstractClassMetaData cmd
      Metadata for the class that needs a primary key class.

    • pkClassName

      final String pkClassName
      Name of the primary key class ("mydomain.MyClass_PK").

    • className_ASM

      final String className_ASM
      ASM name of the PK class ("mydomain/MyClass_PK").

    • className_DescName

      final String className_DescName
      ASM type descriptor name of the PK class ("Lmydomain/MyClass_PK;").

    • classEnhancer

      final ClassEnhancer classEnhancer
      The enhancer being used.

    • stringSeparator

      String stringSeparator

  • Constructor Details

    • PrimaryKeyGenerator

      public PrimaryKeyGenerator(AbstractClassMetaData cmd, ClassEnhancer enhancer)
      Constructor for a PK generator for the specified class.
      Parameters:
      cmd - Metadata for the class that needs a primary key class
      enhancer - The enhancer being used

  • Method Details

    • generate

      public byte[] generate()
      Method to generate the primary key class.
      Returns:
      The bytes for this pk class

    • addFields

      protected void addFields(ClassWriter cw)
      Method to add fields to match the PK fields of the persistable class
      Parameters:
      cw - The ClassWriter to use

    • getTypeNameForField

      protected String getTypeNameForField(AbstractMemberMetaData mmd)

    • addDefaultConstructor

      protected void addDefaultConstructor(ClassWriter cw)
      Method to add an empty default constructor.
      Parameters:
      cw - The ClassWriter to use

    • addStringConstructor

      protected void addStringConstructor(ClassWriter cw)
      Method to add a constructor taking in a String.
      Parameters:
      cw - The ClassWriter to use

    • addMethodToString

      protected void addMethodToString(ClassWriter cw)
      Method to add a toString() method.
      Parameters:
      cw - The ClassWriter to use

    • addMethodEquals

      protected void addMethodEquals(ClassWriter cw)
      Method to add an equals() method.
      Parameters:
      cw - The ClassWriter to use

    • addMethodHashCode

      protected void addMethodHashCode(ClassWriter cw)
      Method to add a hashCode() method.
      Parameters:
      cw - The ClassWriter to use