Using Caché Objects - InterSystems Documentation

Table of Contents
1 Introduction to Caché Objects ....................................................................................... 1
1.1 Caché Objects Architecture ...................................................................................... 2
1.2 Class Definitions and the Class Dictionary ............................................................. 3
1.2.1 Creating Class Definitions .............................................................................. 3
1.2.2 The Class Dictionary ...................................................................................... 3
1.3 The Caché Class Library .......................................................................................... 4
1.4 Development Tools .................................................................................................. 5
1.4.1 Caché Studio ................................................................................................... 5
1.4.2 Caché RoseLink ............................................................................................. 6
1.4.3 SQL-based Development ................................................................................ 6
1.4.4 XML-based Development .............................................................................. 6
1.5 Client Interoperability .............................................................................................. 6
1.5.1 Java ................................................................................................................. 6
1.5.2 ActiveX / COM / .net ...................................................................................... 7
1.5.3 Caché Server Pages ........................................................................................ 7
1.5.4 C++ ................................................................................................................. 7
1.5.5 XML ............................................................................................................... 8
1.5.6 The Caché SQL Gateway ............................................................................... 8
1.5.7 The Caché Activate ActiveX Gateway ............................................................ 8
2 Object-Oriented Database Development ....................................................................... 9
2.1 Classes and Objects .................................................................................................. 9
2.2 Abstraction and Modeling ...................................................................................... 10
2.3 Inheritance and Polymorphism .............................................................................. 10
2.4 Encapsulation ......................................................................................................... 11
2.5 Extensibility ........................................................................................................... 12
2.6 Object Persistence .................................................................................................. 12
2.7 Object Binding ....................................................................................................... 12
3 The Caché Object Model .............................................................................................. 13
3.1 Referring to an Object — OREF, OID, and ID ...................................................... 14
3.1.1 OID and ID Values ....................................................................................... 15
3.1.2 OREFs and Reference Counting .................................................................. 15
3.2 Types of Classes ..................................................................................................... 16
3.2.1 Transient Object Classes .............................................................................. 17
Using Caché Objects
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