Native API for Java
The Native API for Java provides direct access to globals, the tree-based sparse arrays that form the basis of the InterSystems multidimensional storage model and underlie the InterSystems IRIS® object and SQL interfaces. The Native API exposes these native data structures, which provide very fast, flexible storage and retrieval. The Native API also enables your Java application to work with InterSystems IRIS objects as easily as if they were native Java objects, and includes the ability to call InterSystems IRIS class methods and routines.
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First Look: InterSystems Native API for Java