System and a method of fast java object materialization from database data

An apparatus for writing data to a database, the apparatus comprising:

• a database interface configured to enable communication between the apparatus and the database;
• a virtual machine (VM);
• a buffer comprising a plurality of memory regions;
• an object processing kernel on a VM-side, the object processing kernel comprising a VM-side buffer application programming interface (API), and being configured to write object data from a plurality of objects to the buffer using the VM-side buffer API,
• a data writing kernel on a native side, the data writing kernel comprising a native-side buffer API, and being configured to read the object data from the buffer using the native-side buffer API and write the object data to a plurality of locations in the database using the database interface,
• wherein information indicating one of the plural memory regions in the buffer where the object processing kernel writes the object data is known to the native-side buffer API and to the VM-side buffer API.

A method for extracting data from a database, wherein the method is applied to an apparatus for extracting the data from the database, and the method comprises:

• reading database data from a plurality of locations in the database using a database interface, the database data corresponding to a query result,
• writing the database data to a buffer comprising a plurality of memory regions using a native-side buffer application programming interface (API),
• reading database data from the buffer using a virtual machine (VM)-side buffer API, and
• initializing a plurality of objects with the database data read from the buffer,
• wherein information indicating one of the plural memory regions in the buffer where database data is written known to the native-side buffer API and to the VM-side buffer API.

A method for writing data to a database, wherein the method is applied to an apparatus for writing the data to the database, and the method comprises:

• writing object data from a plurality of objects to a buffer comprising a plurality of memory regions using a virtual machine (VM)-side buffer application programming interface (API),
• reading the object data from the buffer using a native-side buffer API, and
• writing the object data to a plurality of locations in the database using the database interface,
• wherein information indicating one of the plural memory regions in the buffer where the object data is written is known to the native-side buffer API and to the VM-side buffer API.