gnu.prolog.vm.buildins.debug
Class Predicate_spy

java.lang.Object
  gnu.prolog.vm.ExecuteOnlyCode
      gnu.prolog.vm.buildins.debug.Predicate_spy

All Implemented Interfaces:

Installable, PrologCode

public class Predicate_spy
extends ExecuteOnlyCode

Set a trace point

Author:

Michiel Hendriks

Field Summary

Fields inherited from interface gnu.prolog.vm.PrologCode

FAIL, HALT, SUCCESS, SUCCESS_LAST

Constructor Summary

Predicate_spy()

Method Summary

int	execute(Interpreter interpreter, boolean backtrackMode, Term[] args) this method is used for execution of code
static CompoundTermTag	getTag(Term term)
static EnumSet<Tracer.TraceLevel>	getTraceLevel(Term term)
protected void	setSpyPoint(Interpreter interpreter, CompoundTermTag tag, Term arg)

Methods inherited from class gnu.prolog.vm.ExecuteOnlyCode

install, uninstall

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

Predicate_spy

public Predicate_spy()

Method Detail

getTraceLevel

public static EnumSet<Tracer.TraceLevel> getTraceLevel(Term term)
                                                throws PrologException

Parameters:

term -

Throws:

PrologException

getTag

public static CompoundTermTag getTag(Term term)
                              throws PrologException

Parameters:

term -

Returns:

Throws:

PrologException

execute

public int execute(Interpreter interpreter,
                   boolean backtrackMode,
                   Term[] args)
            throws PrologException

Description copied from interface: PrologCode

this method is used for execution of code

Specified by:

execute in interface PrologCode

Specified by:

execute in class ExecuteOnlyCode

Parameters:

interpreter - interpreter in which context code is executed

backtrackMode - true if predicate is called on backtracking and false otherwise

args - arguments of code

Returns:

either SUCCESS, SUCCESS_LAST, or FAIL.

Throws:

PrologException

setSpyPoint

protected void setSpyPoint(Interpreter interpreter,
                           CompoundTermTag tag,
                           Term arg)
                    throws PrologException

Throws:

PrologException