November 2002
Intermediate to advanced
560 pages
16h 4m
English
Content preview from Patterns of Enterprise Application Architecture
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Chapter 13. Object-Relational Metadata Mapping Patterns
Metadata Mapping
Holds details of object-relational mapping in metadata.
Much of the code that deals with object-relational mapping describes how fields in the database correspond to fields in in-memory objects. The resulting code tends to be tedious and repetitive to write. A Metadata Mapping allows developers to define the mappings in a simple tabular form, which can then be processed by generic code to carry out the details of reading, inserting, and updating the data.
How It Works
The biggest decision in using Metadata Mapping is how the information in the metadata manifests itself ...
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