Nowadays, newly developed software packages are often obsolete already at the time of their introduction. Object-oriented software development is a possible¿if not the only¿solution to this dilemma: applications are modeled as software objects that describe the properties and the behavior of real-world entities. Such objects are encapsulated, in that they hide¿behind a publicly known interface¿the complexity of their internal data structures and behaviors. This enables objects to be used in a wide range of program packages without needing to know the details of their internal implementation.Linking object-oriented modeled applications with a database places special demands on a database management system and development environment when the usual performance and semantics losses are to be avoided. This book provides a detailed description of the object model of the Caché postrelational database. In addition, it guides the reader step-by-step through the development of postrelational applications. The accompanying CD-ROM contains the complete associated software: InterSystems Caché¿ 4.0 Single-User© 1997-2000 InterSystems Corporation. All rights reserved. Microsoft® Visual Basic® 6 Working Model Edition© 1997-1999 Microsoft Corporation. All rights reserved. Microsoft® Internet Explorer® 5.5 Service Pack 1© 1995-2000 Microsoft Corporation. All rights reserved.The use of this licensed software is governed by an end user license agreement contained in the software.System requirementsPC with Intel CPU (Pentium or better), CD-ROM drive, Windows 95/98/Me or Windows NT/2000, 64 MB main memory (128 MB recommended), 100 MB free disk space.

Includes supplementary material: sn.pub/extras

1 First Steps.- 1.1 Introduction.- 1.2 System Requirements.- 1.3 Installation.- 1.4 Using Caché.- 1.5 Step-by-Step Through the First Example.- 1.6 Outlook.- 2 Introduction to Object Technology.- 2.1 Overview.- 2.2 Objects, Properties, Methods, and Messages.- 2.3 Object Classes and Instances.- 2.4 Class Hierarchies and Inheritance.- 2.5 Abstract and Final Classes.- 2.6 Polymorphism.- 2.7 Complex Objects.- 2.8 Persistency and Other Requirements of Object Technology on a Database System.- 2.9 The Process of Object-Oriented Software Development.- 3 The Caché Object Model.- 3.1 Introduction.- 3.2 Class Types.- 3.3 Elements of Classes.- 3.4 Inheritance.- 3.5 Compile Classes.- 4 The Definition of Classes.- 4.1 Introduction.- 4.2 Caché Object Architect.- 4.3 Managing Classes with Caché Explorer.- 4.4 The Class Definition Language (CDL).- 4.5 Caché Objects Utilities at the Command Level.- 5 Fundamentals of Caché ObjectScript.- 5.1 Basic Structures of Caché ObjectScript.- 5.2 Routines in Caché.- 5.3 Procedural, Structured Programming.- 5.4 Error Processing.- 6 Object Access and Persistency.- 6.1 Objects in Caché ObjectScript.- 6.2 Object Persistency.- 6.3 Set Operations on Objects.- 6.4 Using Objects.- 7 Multidimensional Access and Globals.- 7.1 Multidimensional Variables.- 7.2 Navigation in Multidimensional Arrays.- 7.3 Advanced Global Operations.- 8 SQL Access and Tables.- 8.1 Unified Data Architecture.- 8.2 Structured Query Language SQL.- 8.3 Embedded SQL.- 8.4 Caché SQL Manager.- 8.5 Caché SQL Server-Access Using ODBC.- 9 GUI Programming with Visual Caché.- 9.1 Overview.- 9.2 Caché Object Server for ActiveX.- 9.3 Caché Objects and Visual Basic.- 9.4 Working with Caché Objects in Visual Basic.- 9.5 The Factory Class.- 9.6 The SysList Class.- 9.7 The ResultSetClass.- 9.8 The BinaryStream and CharStream Classes.- 9.9 Visual Caché.- 10 Object Interaction with Java.- 10.1 Overview.- 10.2 Generated Java Classes.- 10.3 Using Caché Objects and Java.- 10.4 Queries and Result Sets.- 11 Web Programming with Caché.- 11.1 Introduction.- 11.2 First Steps with CSP Web Gateway.- 11.3 Interaction with CSP.- 11.4 A Sample Application.- 11.5 Advanced Capabilities of CSP.- 12 Device Management.- 12.1 Input/Output.- 12.2 The Open, Use, and Close Commands.- 12.3 Practical Use of Input/Output in Caché.- Appendix A. Caché ObjectScript Reference.- Commands.- Functions.- System Variables.- Structured System Variables.- Operators.- Pattern Match Characters.- Appendix B. CDL Reference.- Keywords for Classes.- Keywords for Properties.- Keywords for Methods.- Keywords for Class Parameters.- Keywords for Queries.- Keywords for Indexes.- Appendix C. SQL Reference.- Data Query Language (DQL).- Data Manipulation Language (DML).- Transaction Control Language (TCL).- Data Definition Language (DDL).- Reserved Words in Caché SQL.