minimum dependency deployability: as with JVMs, the Prolog+Java runtime support must depend upon nothing which cannot be taken for granted in healthy OS installations and.minimum impact deployability: runtime support for Prolog+Java apps must be a position-independent, self-sufficient filestore tree, requiring no changes to registries, system libraries, system configuration files etc.enable hybrid Prolog+Java applications to be designed and implemented so as to take best advantage of both language systems, and to be testable, debuggable, maintainable.(without requiring any wrappers, metadata etc. enable Java applications to manipulate any Standard Prolog libraries, predicates, etc.

enable Prolog applications to exploit any Java classes, instances, methods etc.

JPL is developed in the GitHub packges-jpl repository withn the SWI-Prolog organization. Check a high-level overview of its many versions here.įor the JPL source code please refer to its GitHub repository. JPL has been integrated into the full SWI-Prolog distribution starting with version 5.4.x, including binaries for MS-Windows and a Linux RPM. The low-level interface is provided for C programmers who may wish to port their C implementations which use the FLI to Java with minimal fuss. JPL is designed in two layers, a low-level interface to the Prolog FLI and a high-level Java interface for the Java programmer who is not concerned with the details of the Prolog FLI. In its current version, JPL supports the embedding of a Prolog engine within the Java VM as well as the embedding of a Java VM within Prolog, so that, for example, one could take advantage of the rich class structure of the Java environment from within Prolog. The current version of JPL only works with SWI-Prolog. JPL is not a pure Java implementation of Prolog it makes extensive use of native implementations of Prolog on supported platforms. JPL uses the Java Native Interface (JNI) to connect to a Prolog engine through the Prolog Foreign Language Interface (FLI). JPL is a set of Java classes and C functions providing a bidirectional interface between Java and Prolog.

Jpe Java Prolog Environment