Class PO

java.lang.Object
   |
   +----PO

public class PO
extends Object

PO Class This is a class where all the static final constants that the Persistent Object package uses are defined


  // modes for the network operations
  // may include more in the future

  public static final int PUT = 2;
  public static final int GETSTR = 1;
  public static final int MODIFY = 0;
  public static final int GETID = 3;
  public static final int GETATT = 4;
  public static final int DELETE = 5;
  public static final int CONNECT = 6;
  public static final int CONNECTNEW = 7;
  public static final int DISCONNECT = 8;
  public static final int GETATTINFO = 9;
  public static final int GETROOTDIR = 10;
  public static final int GETCONTEXT = 11;
  public static final int QUERY = 12;
  public static final int GETVERID = 13;
  public static final int PUTVER = 14;
  public static final int VERGETCONTEXT = 15;

  // other may include Versioned Save, Query...

  // types for type-casting

  public static final int STRING = 1;
  public static final int INT = 2;
  public static final int FLOAT = 3;
  public static final int DOUBLE = 4;
  public static final int BOOLEAN = 5;
  public static final int CHAR = 6;
  public static final int OBJECT = 7;
  public static final int VECTOR = 8;
  public static final int PARENTS = 9;
  public static final int CHILDREN = 10;
  public static final int UNIQUE_ID = 11;
  public static final int ARRAY = 12;

  public static final int CONTAINERS = 9; // matches that of PersistentObject's
  public static final int CONTENTS = 10;  // PARENTS and CHILDREN

  // indicators for the declaration of functions with same name
  //   by different input type
  // initial values do not matter

  public static final String STRING_INDICATOR = "str";
  public static final int INT_INDICATOR = 0;
  public static final float FLOAT_INDICATOR = 1;
  public static final double DOUBLE_INDICATOR = 2;
  public static final boolean BOOLEAN_INDICATOR = true;
  public static final char CHAR_INDICATOR = 'c';
  public static final Object OBJECT_INDICATOR = null;
  public static double[] ARRAY_INDICATOR;
  public static Vector VECTOR_INDICATOR = null;

  // responses from backend DB server

  public static final int OK_VAL = 200;
  public static final int DUPLICATE_VAL = 300;
  public static final int BAD_REQUEST_VAL = 400;
  public static final int NOT_FOUND_VAL = 404;
  public static final int NOT_FOUND_A_VAL = 405;
  public static final int NOT_FOUND_B_VAL = 406;
  public static final int EMPTY_REQUEST_VAL = 407;
  public static final int NO_ATTACH_VAL = 408;
  public static final int SELF_ATTACH_VAL = 409;
  public static final int PERM_ERROR_VAL = 410;
  public static final int CONT_ERROR_VAL = 411;
  public static final int NOT_VERSIONOBJ_VAL = 412;
  public static final int INTERNAL_ERROR_VAL = 500;
  public static final int ATTACH_NOT_FOUND_VAL = 501;

  // operation responses

  public static final int OK = 0;
  public static final int ERROR = 1;
  public static final int DO_NOT_PROCEED = 2;
  public static final int NOT_ATTACHED = 3;

  // values of version Flag

  public static final int NO_VERSION = 0;
  public static final int POINT_VERSION = 1;
  public static final int TREE_VERSION = 2;

  // permission values

  public static final int READ_ONLY = 0;
  public static final int READ_WRITE = 1;