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EclipseLink/Development/DBWS/ParseDDLDS
Parsing DDL for Metadata
The primary job of DBWSBuilder is to extract metadata from the database about some artifact such as a Table or a StoredProcedure that will be used as the basis of (JAX-WS compliant) Web Service. The DBWSBuilder translates the information (fields, arguments, scalar or complex datatypes, etc.) into EclipseLink ORM and OXM files. Thus it is crucial that DBWSBuilder get complete and accurate metadata from the database.
For Oracle databases, DBWSBuilder uses a modified cut-down version of the JPublisher classes to send SQL queries to Data Dictionary views (ALL_OBJECTS, ALL_ARGUMENTS, etc.) that is then converted to an in-memory object-graph of all relevant information about the specific database artifact required for the Web Service. This object-graph is then walked