INTERNAL: XRDynamicEntity is used for models where Java classes do not exist.
EclipseLink is based around mapping attributes of a Java class to a table (or tables) with the attributes representing either the column data or foreign-key contraints as relationships to other (mapped) classes. For applications that are based around meta-data and the Java class is either not needed or not available, this basic entity can be used. Subclasses of this abstract class can be dynamically generated at runtime. @author Mike Norman - michael.norman@oracle.com @since EclipseLink 1.x
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