org.algernon.aam.opcode
Class Limit

java.lang.Object
  org.jatha.dynatype.StandardLispValue
      org.algernon.aam.Opcode
          org.algernon.aam.opcode.Limit

All Implemented Interfaces:

Comparable, LispValue

public class Limit

extends Opcode

This class implements the LIMIT Opcode in the AAM. Limit limits the number of bindings from a query.

   Example: (:LIMIT 10 (sister Mary ?sister))
 

Succeeds if the query succeeds. Fails if the query fails.

Field Summary

Fields inherited from class org.algernon.aam.Opcode

f_algy, m_name, m_numberOfArguments

Fields inherited from class org.jatha.dynatype.StandardLispValue

f_lisp

Constructor Summary

Limit(Algernon algy, String name, int numArgs)
Create a new AAM Limit Opcode.

Method Summary

void	execute(Processor processor, AlgernonKBSet kbSet) Executes the Limit opcode.

Methods inherited from class org.algernon.aam.Opcode

argumentToClass, argumentToClass, argumentToFacet, argumentToFacet, argumentToFrame, argumentToFrame, argumentToInstance, argumentToInstance, argumentToInstance, argumentToRelation, argumentToRelation, getName, getNumberOfArguments, setName, setNumberOfArguments, toString

Methods inherited from class org.jatha.dynatype.StandardLispValue

abs, acos, add, adjustSpecialCount, append, apply, apropos_print, asin, assoc, atan, atan2, atom, basic_atom, basic_bignump, basic_consp, basic_constantp, basic_floatp, basic_foreignp, basic_functionp, basic_integerp, basic_keywordp, basic_length, basic_listp, basic_macrop, basic_null, basic_numberp, basic_stringp, basic_symbolp, bignump, boundp, butlast, car, cdr, ceiling, characterp, clrhash, compareTo, concatenate, consp, constantp, contains, copy_list, copy, cos, cot, csc, degreesToRadians, divide, eighth, elt, elt, eq, eql, equal, equalNumeric, factorial, fboundp, fifth, first, floatp, floor, fourth, funcall, functionp, get_specialCount, gethash, gethash, getLisp, greaterThan, greaterThanOrEqual, hash_table_count, hash_table_rehash_size, hash_table_rehash_threshold, hash_table_size, hash_table_test, hashtablep, integerp, internal_getName, internal_prin1_as_cdr, internal_prin1, internal_princ_as_cdr, internal_princ, internal_print_as_cdr, internal_print, iterator, keywordp, last, length, lessThan, lessThanOrEqual, lisp_null, list, listp, max, member, min, multiply, nconc, negate, neql, ninth, nreverse, nstringCapitalize, nstringDowncase, nstringUpcase, numberp, pop, position, prin1, princ, print, push, radiansToDegrees, rassoc, reciprocal, remhash, remove, rest, reverse, rplaca, rplacd, sec, second, set_special, setf_gethash, setf_symbol_function, setf_symbol_plist, setf_symbol_value, setLisp, setPackage, setq, seventh, sin, sixth, specialP, sqrt, string, stringCapitalize, stringDowncase, stringEndsWith, stringEq, stringEqual, stringGreaterP, stringGreaterThan, stringGreaterThanOrEqual, stringLeftTrim, stringLeftTrim, stringLessP, stringLessThan, stringLessThanOrEqual, stringNeq, stringNotGreaterP, stringNotLessP, stringp, stringRightTrim, stringRightTrim, stringStartsWith, stringTrim, stringTrim, stringUpcase, subst, substring, substring, subtract, symbol_function, symbol_name, symbol_package, symbol_plist, symbol_value, symbolp, tan, tenth, third, toCollection, toJava, toJava, toString, toStringAsCdr_internal, toStringAsCdr, toStringShort, toStringShort, toStringSimple, type_of, typep, zerop

Methods inherited from class java.lang.Object

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

Constructor Detail

Limit

public Limit(Algernon algy,
             String name,
             int numArgs)

Create a new AAM Limit Opcode.

Method Detail

execute

public void execute(Processor processor,
                    AlgernonKBSet kbSet)
             throws AlgernonDataException

Executes the Limit opcode. (:LIMIT 10 ) Checks the results of the previous query. If the number of results is greater than the given number, it removes bindings to reduce the number to the given number. Always succeeds unless the query fails.

Overrides:

execute in class Opcode

Throws:

AlgernonDataException