This package contains the core interfaces and classes of JSDAI to work on data in accordance with the STEP standard (ISO 10303). JSDAI is designed in accordance to the Standand Data Access Interface (ISO 10303-22) and it's complete Java binding (ISO/TS 10303-27).

The package jsdai.lang contains three groups of classes and interfaces: session classes, EXPRESS classes and utility classes and interfaces for aggregates and events. The sequence given below indicates a prefered order for reading.

Session classes

EXPRESS classes/interfaces Aggregates are collections of other STEP objects and are used to implement the  EXPRESS constructs BAG, SET, LIST and  ARRAY. Aggregates created with the new operator are non-persistent. They exist only as long as the application is running. Aggregates which are used for entity attributes cannot be created with the new operator; they can only be created in place with special create methods.  The attributes of dictionary and session entities are read-only. JSDAI objects allow allows applications to register themself to be notified on changes (modify, delete) Classes in the package jsdai.lang which are not listed shall not be used by applications even if they are public.

JSDAI Mapping Extension

Methods related to mapping operations are available only if JSDAI Mapping Extension is installed. Otherwise SdaiException FN_NAVL is thrown upon invocation of mapping operations related methods.

JSDAI DB Extension

Methods related to JSDAI DB are available only if JSDAI DB Extension is installed. Otherwise SdaiException FN_NAVL is thrown upon invocation of remote repository related methods.

Session entities
ISO 10303-22
paragraph no.
session schema entity  JSDAI
7.4.1 sdai_session SdaiSession (class)
7.4.2 implementation Implementation
7.4.3 sdai_repository SdaiRepository
7.4.4 sdai_repository_contents SdaiRepository
7.4.5 sdai_transaction SdaiTransaction
7.4.6 event -
7.4.7 error_event -
ISO 10303-22
paragraph nr.
population schema entity  JSDAI 
8.4.1 schema_instance SchemaInstance
8.4.2 sdai_model SdaiModel
8.4.3 sdai_model_contents SdaiModel
8.4.4 entity_extent EntityExtent
8.4.5 scope -