The Java interface is centered around the class PrologSession,
which represents a connection (or session) to a Prolog
server. PrologSession contains static methods for looking up
named PrologSession instances using JNDI (Java Naming and
Directory Interface) as well as methods for querying the Prolog server.
Other important classes are: QueryAnswer, which contains the
answer for a query sent to the Prolog server; PBTerm, which
represents a Prolog term; and Bindings, which supports stuffing
of variable values used in queries.
General information about Java, Servlets and JNDI is available at the Java Technology site: http://java.sun.com/
A brief description of the provided Java classes are presented below. More information about the Java APIs is available in the JavaDoc files on the page http://sicstus.sics.se/documentation.html.
PrologSessionPrologSession object is the connection to the Prolog
server. The constructor PrologSession()
creates a PrologSession with the default settings
(host = localhost, port = 8066.
QueryAnswerQueryAnswer contains the answer (new bindings) for a query
(or the error that occurred during the query process).
PBTermPBTerm object is for representing parsed Prolog terms.
BindingsBindings is used for binding variables to values
in a query sent to the Prolog. The values will be automatically
stuffed before they are sent to the Prolog server.