A SYSTEM AND A METHOD OF FAST JAVA OBJECT MATERIALIZATION FROM DATABASE DATA

摘要

The present invention relates to an apparatus for extracting data from a database for object initialization, and apparatus for writing object data to a database, a data extraction method, and a method for writing data to a database. The disclosure facilitates fast and memory efficient data exchange between a native side and a virtual machine (VM-) side. In particular, a data extraction kernel on the native-side reads database data from a plurality of locations in the database using a database interface and writes the database data to a buffer using a native-side buffer API (application programming interface). An object initialization kernel on the VM-side reads the database data from the buffer using a native-side buffer API and initializes a plurality of objects. Information indicating one of the plural memory regions in the buffer where the data extraction kernel writes the database data is known to the native-side buffer API and to the VM-side buffer API.