Mapping of Type

OpenOffice.org Developer's Guide

Professional UNO

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• Introduction
• API Concepts

• Data Types

• Simple Types
• The Any Type
• Interfaces
• Services
• Structs
• Predefined Values
• Sequences
• Modules
• Exceptions
• Singletons

• Understanding the API Reference

• UNO Concepts

• UNO Interprocess Connections

• Starting OpenOffice.org in Listening Mode
• Importing a UNO Object
• Characteristics of the Interprocess Bridge
• Opening a Connection
• Creating the Bridge
• Closing a Connection
• Example: A Connection Aware Client

• Service Manager and Component Context

• Service Manager
• Component Context

• Using UNO Interfaces
• Properties
• Collections and Containers
• Event Model
• Exception Handling
• Lifetime of UNO objects

• acquire() and release()
• The XComponent Interface
• Children of the XEventListener Interface
• Weak Objects and References
• Differences Between the Lifetime of C++ and Java Objects

• Object Identity

• UNO Language Bindings

• Java Language Binding

• Getting a Service Manager
• Transparent Use of Office UNO Components
• Handling Interfaces
• Type Mappings

• Mapping of Sequence Types
• Mapping of Enum Types
• Mapping of Struct Types
• Mapping of Exception Types
• Mapping of Interface Types
• Mapping of UNOIDL
• Mapping of Services
• Mapping of Singletons
• Inexact approximation of UNO Value Semantics

• C++ Language Binding

• Establishing Interprocess Connections
• Transparent Use of Office UNO Components
• Type Mappings

• Mapping of Struct Types
• Mapping of Interface Types
• Mapping of Sequence Types
• Mapping of Services
• Mapping of Singletons

• Using Weak References
• Exception Handling in C++

• OpenOffice.org Basic

• Handling UNO Objects

• Instantiating UNO Services
• Getting Information about UNO Objects

• Mapping of UNO and Basic Types

• Mapping of Simple Types
• Mapping of Sequences and Arrays
• Mapping of Structs
• Mapping of Enums and Constant Groups

• Case Sensitivity
• Exception Handling
• Listeners

• Automation Bridge

• The Service Manager Component
• Using UNO from Automation

• Calling Functions and Accessing Properties
• Return Values
• Usage of Types

• Using Automation Objects from UNO
• Type Mappings

• Default Mappings

• Mapping of Simple Types
• Mapping of Hyper and Decimal
• Mapping of String
• Mapping of Interfaces and Structures
• Mapping of Sequence
• Mapping of Type

• Conversion Mappings
• Client-Side Conversions
• Value Objects
• Exceptions and Errorcodes

• Automation Objects with UNO Interfaces
• DCOM
• The Bridge Services
• Unsupported COM Features

• CLI Language Binding

• The Language Binding DLLs
• Type Mapping

• Type Name Decoration
• Type Mappings
• Additional Structures

• Lifetime Management and Obtaining Interfaces
• Writing Client Programs

• The Override Problem
• Important Interfaces and Implementations

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Since there is no counterpart to the UNO type among the Automation types, it is mapped to an object. The object implements IDispatch and a private tagging interface that is known to the bridge. Therefore, whenever an object is passed in a call to a UNO object the bridge can determine whether it represents a type. To obtain a type one calls Bridge_CreateType on the service manager object and provides the name of the type. For example:

  'Visual Basic
  Dim objType
  Set objType = objServiceManager.Bridge_CreateType(“com.sun.star.uno.XInterface”)

In case the provided argument does not represent a valid type, the call produces an error.

If a UNO method returns a type, either as return value or out - parameter, then it is automatically converted to an object.

  //UNOIDL
  type foo([out] type t)

 
  'Visual Basic
  
  Dim objParam As Object
  Dim objReturn As Object
  Set objReturn = object.foo(objParam)

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