14. XTypes

eProsima Fast DDS supports the OMG Extensible and Dynamic Topic Types for DDS specification (also known as XTypes). This specification defines the following concepts:

• DDS supported type system, including the concept of extensible types that might evolve in time.

• Type representation, including IDL and TypeObject representations.

• Data representation over the wire.

• Language binding, defining both a plain and a dynamic language binding. eProsima Fast DDS-Gen generates the plain language binding given an IDL type representation. Dynamic Language Binding section explains the required API to define and set/read the data types.

• DDS builtin mechanism to automatically discover remote data types. More information in Remote Data Types Discovery section.

• 14.1. Remote Data Types Discovery
  • 14.1.1. Prerequisites
  • 14.1.2. Remote types discovery example
• 14.2. Dynamic Language Binding
  • 14.2.1. Dynamic Language Binding Interfaces
    • 14.2.1.1. TypeDescriptor
    • 14.2.1.2. AnnotationDescriptor
    • 14.2.1.3. MemberDescriptor
    • 14.2.1.4. VerbatimTextDescriptor
    • 14.2.1.5. DynamicTypeBuilderFactory
    • 14.2.1.6. DynamicType
    • 14.2.1.7. DynamicTypeMember
    • 14.2.1.8. DynamicTypeBuilder
    • 14.2.1.9. DynamicDataFactory
    • 14.2.1.10. DynamicData
  • 14.2.2. Supported Types
    • 14.2.2.1. Primitive Types
    • 14.2.2.2. String Types
    • 14.2.2.3. Enumeration Types
    • 14.2.2.4. Bitmask Types
    • 14.2.2.5. Alias Types
    • 14.2.2.6. Sequence types
    • 14.2.2.7. Array types
    • 14.2.2.8. Map Types
    • 14.2.2.9. Structure Types
    • 14.2.2.10. Union Types
    • 14.2.2.11. Bitset Types
    • 14.2.2.12. Annotations
    • 14.2.2.13. Managing Complex Types Data

Note

Type compatibility rules among evolved types are still unsupported in Fast DDS.