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Sigma knowledge engineering system is an system for developing, viewing and debugging theories in first
order logic. It works with Knowledge Interchange Format (KIF) and is optimized for the Suggested Upper Merged
Ontology (SUMO) www.ontologyportal.org.
/** This code is copyright Articulate Software (c) 2003. Some
portions copyright Teknowledge (c) 2003 and reused under the termsof the GNU
license. This software is released under the GNU Public License
. Users of this code also consent,
by use of this code, to credit Articulate Software and Teknowledge in any
writings, briefings, publications, presentations, or other representations
of any software which incorporates, builds on, or uses this code. Please
cite the following article in any publication with references:
Pease, A., (2003). The Sigma Ontology Development Environment, in Working
Notes of the IJCAI-2003 Workshop on Ontology and Distributed Systems,
August 9, Acapulco, Mexico. see also
http://sigmakee.sourceforge.net
Note that this class, and therefore, Sigma, depends upon several terms
being present in the ontology in order to function as intended. They are:
and or forall exists
domain
EnglishLanguage
equal
format
instance
inverse
Predicate
Relation
SetOrClass
subclass
subrelation
termFormat
valence
VariableArityRelation
*/
/*************************************************************************************************/
package com.articulate.sigma;
/*
Copyright 2014-2015 IPsoft
Author: Adam Pease [email protected]
Author: Sofia Athenikos [email protected]
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program ; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston,
MA 02111-1307 USA
*/
import com.google.common.collect.Lists;
import com.google.common.collect.Maps;
import com.google.common.collect.Sets;
import java.io.*;
import java.text.ParseException;
import java.util.*;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import java.util.regex.PatternSyntaxException;
/** *****************************************************************
* Contains methods for reading, writing knowledge bases and their
* configurations. Also contains the inference engine process for
* the knowledge base.
*/
public class KB {
private boolean isVisible = true;
/** The inference engine process for this KB. */
public EProver eprover;
/** The name of the knowledge base. */
public String name;
/** An ArrayList of Strings that are the full
* canonical pathnames of the files that comprise the KB. */
public ArrayList constituents = new ArrayList();
/** The natural language in which axiom paraphrases should be presented. */
public String language = "EnglishLanguage";
/** The location of preprocessed KIF files, suitable for loading into EProver. */
public String kbDir = null;
/** The instance of the CELT process. */
public CELT celt = null;
/** A synchronized SortedSet of Strings, which are all the terms in the KB. */
public SortedSet terms = Collections.synchronizedSortedSet(new TreeSet());
/** The String constant that is the suffix for files of user assertions. */
public static final String _userAssertionsString = "_UserAssertions.kif";
/** The String constant that is the suffix for files of cached assertions. */
public static final String _cacheFileSuffix = "_Cache.kif";
/** A Map of all the Formula objects in the KB. Each key is a
* String representation of a Formula. Each value is the Formula
* object corresponding to the key. */
public HashMap formulaMap = new HashMap();
/** A HashMap of ArrayLists of String formulae, containing all the
* formulae in the KB. Keys are the formula itself, a formula ID, and term
* indexes created in KIF.createKey(). The actual formula can be retrieved
* by using the returned String as the key for the variable formulaMap */
public HashMap> formulas = new HashMap>();
/** The natural language formatting strings for relations in the
* KB. It is a HashMap of language keys and HashMap values.
* The interior HashMap is term name keys and String values. */
private HashMap> formatMap = new HashMap>();
/** The natural language strings for terms in the KB. It is a
* HashMap of language keys and HashMap values. The interior
* HashMap is term name keys and String values. */
private HashMap> termFormatMap = new HashMap>();
/** Errors and warnings found during loading of the KB constituents. */
public TreeSet errors = new TreeSet();
/** Future: If true, the contents of the KB have been modified without updating the caches */
public boolean modifiedContents = false;
/** If true, assertions of the form (predicate x x) will be
* included in the relation cache tables. */
private boolean cacheReflexiveAssertions = false;
public KBcache kbCache = null;
/** *************************************************************
* Constructor which takes the name of the KB and the location
* where KBs preprocessed for EProver should be placed.
*/
public KB(String n, String dir) {
name = n;
kbDir = dir;
try {
KBmanager mgr = KBmanager.getMgr();
if (mgr != null) {
String loadCelt = mgr.getPref("loadCELT");
if ((loadCelt != null) && loadCelt.equalsIgnoreCase("yes"))
celt = new CELT();
}
}
catch (IOException ioe) {
System.out.println("Error in KB(): " + ioe.getMessage());
celt = null;
}
}
public KB(String n, String dir, boolean visibility) {
this(n, dir);
isVisible = visibility;
}
/** *************************************************************
* Perform a deep copy of the kb input
* @param kbIn
* @throws IOException
*/
public KB(KB kbIn) throws IOException {
this.isVisible = kbIn.isVisible;
if (kbIn.eprover != null) {
this.eprover = kbIn.eprover;
}
this.name = kbIn.name;
if(kbIn.constituents != null) {
this.constituents = Lists.newArrayList(kbIn.constituents);
}
this.language = kbIn.language;
this.kbDir = kbIn.kbDir;
if (kbIn.terms != null) {
this.terms = Collections.synchronizedSortedSet(new TreeSet(kbIn.terms));
}
if (kbIn.formulaMap != null) {
for (Map.Entry pair : kbIn.formulaMap.entrySet()) {
String key = pair.getKey();
Formula newFormula = new Formula(pair.getValue());
this.formulaMap.put(key, newFormula);
}
}
if (kbIn.formulas != null) {
for (Map.Entry> pair : kbIn.formulas.entrySet()) {
String key = pair.getKey();
ArrayList newList = Lists.newArrayList(pair.getValue());
this.formulas.put(key, newList);
}
}
if (kbIn.formatMap != null) {
this.formatMap = Maps.newHashMap(kbIn.formatMap);
}
if (kbIn.termFormatMap != null) {
this.termFormatMap = Maps.newHashMap(kbIn.termFormatMap);
}
if(kbIn.errors != null) {
this.errors = Sets.newTreeSet(kbIn.errors);
}
this.modifiedContents = kbIn.modifiedContents;
this.kbCache = new KBcache(kbIn.kbCache, this);
// Must be done after kb manager set.
if (kbIn.celt != null) {
this.celt = new CELT();
}
}
public boolean isVisible() {
return isVisible;
}
/** *************************************************************
* Constructor
*/
public KB(String n) {
name = n;
try {
KBmanager mgr = KBmanager.getMgr();
kbDir = mgr.getPref("kbDir");
if (mgr != null) {
String loadCelt = mgr.getPref("loadCELT");
if ((loadCelt != null) && loadCelt.equalsIgnoreCase("yes"))
celt = new CELT();
}
}
catch (IOException ioe) {
System.out.println("Error in KB(): " + ioe.getMessage());
celt = null;
}
}
/** ************************************************************
* Returns a SortedSet of Strings, which are all
* the terms in the KB. */
public SortedSet getTerms() {
return this.terms;
}
/** **************************************************
* REswitch determines if a String is a RegEx or not based on its use of RE metacharacters. "1"=nonRE, "2"=RE
*
* @param term A String
* @return "1" or "2"
*/
public String REswitch(String term) {
if (term.contains("(")||term.contains("[")||term.contains("{")||term.contains("\\")||term.contains("^")||term.contains("$")||
term.contains("|")||term.contains("}")||term.contains("]")||term.contains(")")||term.contains("?")||term.contains("*")||
term.contains("+"))
return "2";
return "1";
}
/** *************************************************
* Only called in BrowseBody.jsp when a single match is found. Purpose is to simplify a RegEx to its only matching term
*
* @param term a String
* @return modified term a String
*/
public String simplifyTerm(String term) {
if (getREMatch(term.intern()).size()==1)
return getREMatch(term.intern()).get(0);
return term;
}
/** **************************************************
* Takes a term (interpreted as a Regular Expression) and returns true
* if any term in the KB has a match with the RE.
*
* @param term A String
* @return true or false.
*/
public boolean containsRE(String term) {
return (getREMatch(term).size()>0 ? true : false);
}
/** **************************************************
* Takes a term (interpreted as a Regular Expression) and returns an ArrayList
* containing every term in the KB that has a match with the RE.
*
* @param term A String
* @return An ArrayList of terms that have a match to term
*/
public ArrayList getREMatch(String term) {
try {
Pattern p = Pattern.compile(term);
ArrayList matchesList = new ArrayList();
Iterator itr = getTerms().iterator();
while(itr.hasNext()) {
String t = itr.next();
Matcher m = p.matcher(t);
if (m.matches())
matchesList.add(t);
}
return matchesList;
}
catch (PatternSyntaxException ex) {
ArrayList err = new ArrayList();
err.add("Invalid Input");
return err;
}
}
/** ************************************************************
* Sets the synchronized SortedSet of all the terms in the
* KB to be kbTerms. */
public void setTerms(SortedSet newTerms) {
synchronized (getTerms()) {
getTerms().clear();
this.terms = Collections.synchronizedSortedSet(newTerms);
}
return;
}
/** *************************************************************
* Get an ArrayList of Strings containing the language identifiers
* of available natural language formatting templates.
*
* @return an ArrayList of Strings containing the language identifiers
*/
public ArrayList availableLanguages() {
ArrayList al = new ArrayList();
ArrayList col = ask("arg", 0, "format");
ArrayList col2 = ask("arg", 0, "termFormat");
if (col != null) {
if (col2 != null)
col.addAll(col2);
for (int i = 0; i < col.size(); i++) {
Formula f = (Formula) col.get(i);
String lang = f.getArgument(1);
if (!al.contains(lang.intern()))
al.add(lang.intern());
}
}
al.addAll(OMWordnet.lnames);
return al;
}
/** *************************************************************
* Remove from the given set any item which is a superclass of another item in the set.
* @param set
* @return
*/
public Set removeSuperClasses(Set set) {
Set returnSet = Sets.newHashSet(set);
Set removeSet = Sets.newHashSet();
// Compare every element to every other.
for(String first : returnSet) {
for(String second : returnSet) {
if(isSubclass(first, second)) {
removeSet.add(second);
}
}
}
returnSet.removeAll(removeSet);
return returnSet;
}
/** *************************************************************
* Arity errors should already have been trapped in addConstituent()
* unless a relation is used before it is defined. This routine
* is a comprehensive re-check.
*/
public void checkArity() {
ArrayList toRemove = new ArrayList();
System.out.print("INFO in KB.checkArity(): Performing Arity Check");
if (formulaMap != null && formulaMap.size() > 0) {
int counter = 0;
Iterator formulas = formulaMap.keySet().iterator();
while (formulas.hasNext()) {
Formula f = (Formula) formulaMap.get(formulas.next());
if (counter == 100) {
System.out.print(".");
counter = 0;
}
String term = PredVarInst.hasCorrectArity(f,this);
if (!StringUtil.emptyString(term)) {
errors.add("Formula in " + f.sourceFile +
" rejected due to arity error of predicate " + term +
" in formula: \n" + f.theFormula);
toRemove.add(f.theFormula);
}
}
System.out.println();
}
//for (int i = 0; i < toRemove.size(); i++)
// formulaMap.remove(toRemove.get(i));
}
/** *************************************************************
* Returns the type (SUO-KIF SetOrClass name) for any argument in
* argPos position of an assertion formed with the SUO-KIF
* Relation reln. If no argument type value is directly stated
* for reln, this method tries to find a value inherited from one
* of reln's super-relations.
*
* @param reln A String denoting a SUO-KIF Relation
* @param argPos An int denoting an argument position, where 0 is
* the position of reln itself
* @return A String denoting a SUO-KIF SetOrClass, or null if no
* value can be obtained
*/
public String getArgType(String reln, int argPos) {
String className = null;
String argType = FormulaPreprocessor.findType(argPos, reln, this);
if (StringUtil.isNonEmptyString(argType)) {
if (argType.endsWith("+"))
argType = "SetOrClass";
className = argType;
}
return className;
}
/** *************************************************************
* Returns the type (SUO-KIF SetOrClass name) for any argument in
* argPos position of an assertion formed with the SUO-KIF
* Relation reln. If no argument type value is directly stated
* for reln, this method tries to find a value inherited from one
* of reln's super-relations.
*
* @param reln A String denoting a SUO-KIF Relation
*
* @param argPos An int denoting an argument position, where 0 is
* the position of reln itself
*
* @return A String denoting a SUO-KIF SetOrClass, or null if no
* value can be obtained. A '+' is appended to the class name
* if the argument is a subclass of the class, rather than an instance
*/
public String getArgTypeClass(String reln, int argPos) {
String className = null;
String argType = FormulaPreprocessor.findType(argPos, reln, this);
if (StringUtil.isNonEmptyString(argType))
className = argType;
return className;
}
/** *************************************************************
* Determine whether a particular term is an immediate instance,
* which has a statement of the form (instance term otherTerm).
* Note that this does not count for terms such as Attribute(s)
* and Relation(s), which may be defined as subAttribute(s) or
* subrelation(s) of another instance. If the term is not an
* instance, return an empty ArrayList. Otherwise, return an
* ArrayList of the Formula(s) in which the given term is
* defined as an instance.
*/
public ArrayList instancesOf(String term) {
return askWithRestriction(1,term,0,"instance");
}
/** *************************************************************
* Returns true if i is an instance of c, else returns false.
*
* @param i A String denoting an instance.
* @param c A String denoting a Class.
* @return true or false.
*/
public boolean isInstanceOf(String i, String c) {
return kbCache.isInstanceOf(i, c);
}
/** *************************************************************
* Returns true if i is c, is an instance of c, or is subclass of c,
* or is subAttribute of c,
* else returns false.
*
* @param i A String denoting an instance.
* @param c A String denoting a Class.
* @return true or false.
*/
public boolean isChildOf(String i, String c) {
return i.equals(c) || isInstanceOf(i,c) || isSubclass(i,c) || isSubAttribute(i,c);
}
/** *************************************************************
* Returns true if i is an instance of c in any loaded KB, else
* returns false.
*
* @param i A String denoting an instance.
* @return true or false.
*/
public static boolean isRelationInAnyKB(String i) {
HashMap kbs = KBmanager.getMgr().kbs;
if (!kbs.isEmpty()) {
KB kb = null;
Iterator it = kbs.values().iterator();
while (it.hasNext()) {
kb = it.next();
if (kb.kbCache.relations.contains(i))
return true;
}
}
return false;
}
/** *************************************************************
*/
public boolean isInstance(String term) {
ArrayList al = askWithRestriction(0,"instance",1,term);
return (al != null && al.size() > 0);
}
/** *************************************************************
* Determine whether a particular class or instance "child" is a
* child of the given "parent".
*
* @param child A String, the name of a term.
* @param parent A String, the name of a term.
* @return true if child and parent constitute an actual or
* implied relation in the current KB, else false.
*/
public boolean childOf(String child, String parent) {
if (child.equals(parent))
return true;
if (kbCache.transInstOf(child,parent))
return true;
if (kbCache.childOfP("instance",parent,child) ||
kbCache.childOfP("subclass",parent,child) ||
kbCache.childOfP("subrelation",parent,child) ||
kbCache.childOfP("subAttribute",parent,child))
return true;
return false;
}
/** *************************************************************
* Returns true if the subclass cache supports the conclusion that
* c1 is a subclass of c2, else returns false.
*
* @param c1 A String, the name of a SetOrClass.
* @param c2 A String, the name of a SetOrClass.
* @return boolean
*/
public boolean isSubclass(String c1, String c2) {
if (StringUtil.isNonEmptyString(c1) && StringUtil.isNonEmptyString(c2))
return kbCache.childOfP("subclass",c2,c1);
return false;
}
/** *************************************************************
* Returns true if the KB cache supports the conclusion that
* c1 is a subAttribute of c2, else returns false.
*
* @param c1 A String, the name of a SetOrClass.
* @param c2 A String, the name of a SetOrClass.
* @return boolean
*/
public boolean isSubAttribute(String c1, String c2) {
if (StringUtil.isNonEmptyString(c1) && StringUtil.isNonEmptyString(c2)) {
return kbCache.childOfP("subAttribute", c2, c1);
}
return false;
}
/** *************************************************************
* Converts all Formula objects in the input List to ArrayList
* tuples.
*
* @param formulaList A list of Formulas.
*
* @return An ArrayList of formula tuples (ArrayLists), or an
* empty ArrayList.
*/
public static ArrayList> formulasToArrayLists(List formulaList) {
ArrayList> ans = new ArrayList>();
if (formulaList instanceof List) {
Iterator it = formulaList.iterator();
Formula f = null;
while (it.hasNext()) {
f = (Formula) it.next();
ans.add(f.literalToArrayList());
}
}
return ans;
}
/** *************************************************************
* Converts all Strings in the input List to Formula objects.
*
* @param strings A list of Strings.
*
* @return An ArrayList of Formulas, or an empty ArrayList.
*/
public static ArrayList stringsToFormulas(List strings) {
ArrayList ans = new ArrayList();
if (strings instanceof List) {
Iterator it = strings.iterator();
while (it.hasNext()) {
Formula f = new Formula();
f.read(it.next());
ans.add(f);
}
}
return ans;
}
/** *************************************************************
* Converts a literal (List object) to a String.
*
* @param literal A List representing a SUO-KIF formula.
* @return A String representing a SUO-KIF formula.
*/
public static String literalListToString(List literal) {
StringBuffer b = new StringBuffer();
if (literal instanceof List) {
b.append("(");
for (int i = 0; i < literal.size(); i++) {
if (i > 0)
b.append(" ");
b.append(literal.get(i));
}
b.append(")");
}
return b.toString();
}
/** *************************************************************
* Converts a literal (List object) to a Formula.
*
* @param lit A List representing a SUO-KIF formula.
* @return A SUO-KIF Formula object, or null if no Formula can be
* created.
*/
public static Formula literalListToFormula(List lit) {
Formula f = null;
String theFormula = literalListToString(lit);
if (StringUtil.isNonEmptyString(theFormula)) {
f = new Formula();
f.read(theFormula);
}
return f;
}
/** *************************************************************
* Returns an ArrayList containing the terms (Strings) that
* correspond to targetArgnum in the Formulas obtained from the
* method call askWithRestriction(argnum1, term1, argnum2, term2).
*
* @param predicatesUsed A Set to which will be added the
* predicates of the ground assertions
* actually used to gather the terms
* returned
*
* @return An ArrayList of terms, or an empty ArrayList if no
* terms can be retrieved.
*/
public ArrayList getTermsViaAskWithRestriction(int argnum1,
String term1,
int argnum2,
String term2,
int targetArgnum,
Set predicatesUsed) {
ArrayList result = new ArrayList();
if (StringUtil.isNonEmptyString(term1)
&& !StringUtil.isQuotedString(term1)
&& StringUtil.isNonEmptyString(term2)
&& !StringUtil.isQuotedString(term2)) {
ArrayList formulae = askWithRestriction(argnum1, term1, argnum2, term2);
Formula f = null;
Iterator it = formulae.iterator();
while (it.hasNext()) {
f = it.next();
result.add(f.getArgument(targetArgnum));
}
if (predicatesUsed instanceof Set) {
Iterator it2 = formulae.iterator();
while (it2.hasNext()) {
f = (Formula) it2.next();
predicatesUsed.add(f.car());
}
}
}
return result;
}
/** *************************************************************
* Returns an ArrayList containing the terms (Strings) that
* correspond to targetArgnum in the Formulas obtained from the
* method call askWithRestriction(argnum1, term1, argnum2, term2).
*
* @return An ArrayList of terms, or an empty ArrayList if no
* terms can be retrieved.
*/
public ArrayList getTermsViaAskWithRestriction(int argnum1,
String term1,
int argnum2,
String term2,
int targetArgnum) {
return getTermsViaAskWithRestriction(argnum1, term1, argnum2,
term2, targetArgnum, null);
}
/** *************************************************************
* Returns the first term found that corresponds to targetArgnum
* in the Formulas obtained from the method call
* askWithRestriction(argnum1, term1, argnum2, term2).
*
* @return A SUO-KIF term (String), or null is no answer can be
* retrieved.
*/
public String getFirstTermViaAskWithRestriction(int argnum1, String term1,
int argnum2, String term2, int targetArgnum) {
String result = null;
ArrayList terms = getTermsViaAskWithRestriction(argnum1, term1, argnum2,
term2, targetArgnum);
if (!terms.isEmpty())
result = (String) terms.get(0);
return result;
}
/** *************************************************************
* @return an ArrayList of Formulas in which the two terms
* provided appear in the indicated argument positions. If there
* are no Formula(s) matching the given terms and respective
* argument positions, return an empty ArrayList. Iterate
* through the smallest list of results.
*/
public ArrayList askWithRestriction(int argnum1, String term1, int argnum2, String term2) {
ArrayList result = new ArrayList();
if (StringUtil.isNonEmptyString(term1) && StringUtil.isNonEmptyString(term2)) {
ArrayList partial1 = ask("arg", argnum1, term1);
ArrayList partial2 = ask("arg", argnum2, term2);
//System.out.println("INFO in KB.askWithRestriction(): partial 2: " + partial2);
ArrayList partial = partial1;
// partial.retainAll(partial2); - this should be faster than below
int arg = argnum2;
String term = term2;
if (partial1.size() > partial2.size()) {
partial = partial2;
arg = argnum1;
term = term1;
}
Formula f = null;
int plen = partial.size();
for (int i = 0; i < plen; i++) {
f = (Formula) partial.get(i);
if (f == null)
System.out.println("Error in KB.askWithRestriction(): null formula searching on term: " + term);
String thisArg = f.getArgument(arg);
if (thisArg == null) {
System.out.println("Error in KB.askWithRestriction(): null argument: " + f);
}
else if (f.getArgument(arg).equals(term))
result.add(f);
}
}
return result;
}
/** *************************************************************
* Returns an ArrayList of Formulas in which the two terms
* provided appear in the indicated argument positions. If there
* are no Formula(s) matching the given terms and respective
* argument positions, return an empty ArrayList.
*
* @return ArrayList
*/
public ArrayList askWithTwoRestrictions(int argnum1, String term1,
int argnum2, String term2,
int argnum3, String term3) {
String[] args = new String[6];
args[0] = "argnum1 = " + argnum1;
args[1] = "term1 = " + term1;
args[0] = "argnum2 = " + argnum2;
args[1] = "term2 = " + term2;
args[0] = "argnum3 = " + argnum3;
args[1] = "term3 = " + term3;
ArrayList result = new ArrayList();
if (StringUtil.isNonEmptyString(term1)
&& StringUtil.isNonEmptyString(term2)
&& StringUtil.isNonEmptyString(term3)) {
// a will get the smallest list then b then c
ArrayList partiala = new ArrayList();
ArrayList partial1 = ask("arg",argnum1,term1);
ArrayList partial2 = ask("arg",argnum2,term2);
ArrayList partial3 = ask("arg",argnum3,term3);
int argb = -1;
String termb = "";
int argc = -1;
String termc = "";
if (partial1 == null || partial2 == null || partial3 == null)
return result;
if (partial1.size() > partial2.size() && partial1.size() > partial3.size()) {
argc = argnum1;
termc = term1;
if (partial2.size() > partial3.size()) {
argb = argnum2;
termb = term2;
partiala = partial3;
}
else {
argb = argnum3;
termb = term3;
partiala = partial2;
}
}
if (partial2.size() > partial1.size() && partial2.size() > partial3.size()) {
argc = argnum2;
termc = term2;
if (partial1.size() > partial3.size()) {
argb = argnum1;
termb = term1;
partiala = partial3;
}
else {
argb = argnum3;
termb = term3;
partiala = partial1;
}
}
if (partial3.size() > partial1.size() && partial3.size() > partial2.size()) {
argc = argnum3;
termc = term3;
if (partial1.size() > partial2.size()) {
argb = argnum1;
termb = term1;
partiala = partial2;
}
else {
argb = argnum2;
termb = term2;
partiala = partial1;
}
}
if (partiala != null) {
for (int i = 0; i < partiala.size(); i++) {
Formula f = partiala.get(i);
if (f.getArgument(argb).equals(termb)) {
if (f.getArgument(argc).equals(termc))
result.add(f);
}
}
}
}
return result;
}
/** *************************************************************
* Returns an ArrayList containing the SUO-KIF terms that match
* the request.
*
* @return An ArrayList of terms, or an empty ArrayList if no
* matches can be found.
*/
public ArrayList getTermsViaAWTR(int argnum1, String term1,
int argnum2, String term2,
int argnum3, String term3,
int targetArgnum) {
ArrayList ans = new ArrayList();
List formulae = askWithTwoRestrictions(argnum1, term1,
argnum2, term2,
argnum3, term3);
Formula f = null;
for (int i = 0; i < formulae.size(); i++) {
f = formulae.get(i);
ans.add(f.getArgument(targetArgnum));
}
return ans;
}
/** *************************************************************
* Returns the first SUO-KIF terms that matches the request, or
* null.
*
* @return A term (String), or null.
*/
public String getFirstTermViaAWTR(int argnum1, String term1,
int argnum2, String term2,
int argnum3, String term3,
int targetArgnum) {
String ans = null;
List terms = getTermsViaAWTR(argnum1, term1,
argnum2, term2,
argnum3, term3,
targetArgnum);
if (!terms.isEmpty())
ans = (String) terms.get(0);
return ans;
}
/** *************************************************************
* Returns an ArrayList containing the terms (Strings) that
* correspond to targetArgnum in the ground atomic Formulae in
* which knownArg is in the argument position knownArgnum. The
* ArrayList returned will contain no duplicate terms.
*
* @param knownArgnum The argument position of knownArg
*
* @param knownArg The term that appears in the argument
* knownArgnum of the ground atomic Formulae in
* the KB
*
* @param targetArgnum The argument position of the terms being sought
*
* @return An ArrayList of Strings, which will be empty if no
* match found.
*/
public ArrayList getTermsViaAsk(int knownArgnum, String knownArg, int targetArgnum) {
ArrayList result = new ArrayList();
List formulae = ask("arg", knownArgnum, knownArg);
if (!formulae.isEmpty()) {
TreeSet ts = new TreeSet();
Formula f = null;
Iterator it = formulae.iterator();
while (it.hasNext()) {
f = it.next();
ts.add(f.getArgument(targetArgnum));
}
result.addAll(ts);
}
return result;
}
/** *************************************************************
*/
private ArrayList stringsToFormulas(ArrayList strings) {
ArrayList result = new ArrayList();
if (strings == null) return result;
for (int i = 0; i < strings.size(); i++) {
String s = strings.get(i);
Formula f = formulaMap.get(s);
if (f != null)
result.add(f);
else
System.out.println("Error in KB.stringsToFormulas(): null formula for key: " + s);
}
return result;
}
/** *************************************************************
* Returns an ArrayList containing the Formulas that match the
* request.
*
* @param kind May be one of "ant", "cons", "stmt", or "arg"
* @see KIF.createKey()
* @param term The term that appears in the statements being
* requested.
* @param argnum The argument position of the term being asked
* for. The first argument after the predicate
* is "1". This parameter is ignored if the kind
* is "ant", "cons" or "stmt".
* @return An ArrayList of Formula(s), which will be empty if no
* match found.
*/
public ArrayList ask(String kind, int argnum, String term) {
ArrayList result = new ArrayList();
String msg = null;
if (StringUtil.emptyString(term)) {
msg = ("Error in KB.ask(\"" + kind + "\", " + argnum + ", \"" + term + "\"), "
+ "search term is null, or an empty string");
errors.add(msg);
}
if (term.length() > 1
&& term.charAt(0) == '"'
&& term.charAt(term.length()-1) == '"') {
msg = ("Error in KB.ask(), Strings are not indexed. No results for " + term);
errors.add(msg);
}
ArrayList tmp = null;
String key = null;
if (kind.equals("arg"))
key = kind + "-" + argnum + "-" + term;
else
key = kind + "-" + term;
ArrayList alstr = formulas.get(key);
tmp = stringsToFormulas(alstr);
if (tmp != null)
result.addAll(tmp);
return result;
}
/** *************************************************************
* Returns an ArrayList containing the Formulae retrieved,
* possibly via multiple asks that recursively use relation and
* all of its subrelations. Note that the Formulas might be
* formed with different predicates, but all of the predicates
* will be subrelations of relation and will be related to each
* other in a subsumption hierarchy.
*
* @param relation The name of a predicate, which is assumed to be
* the 0th argument of one or more atomic
* formulae
* @param idxArgnum The argument position occupied by idxTerm in
* each ground Formula to be retrieved
* @param idxTerm A constant that occupied idxArgnum position in
* each ground Formula to be retrieved
* @return an ArrayList of Formulas that satisfy the query, or an
* empty ArrayList if no Formulae are retrieved.
*/
public ArrayList askWithPredicateSubsumption(String relation, int idxArgnum, String idxTerm) {
ArrayList ans = new ArrayList();
HashSet accumulator = new HashSet();
if (StringUtil.isNonEmptyString(relation) && StringUtil.isNonEmptyString(idxTerm)
&& (idxArgnum >= 0) ) { // && (idxArgnum < 7)
HashSet relns = new HashSet(); // relation and subrelations
relns.add(relation);
ArrayList subrelForms = askWithRestriction(0, "subrelation", 2, relation);
for (int i = 0; i < subrelForms.size(); i++) {
Formula f = subrelForms.get(i);
String arg = f.getArgument(1);
relns.add(arg);
}
ArrayList forms = ask("arg",idxArgnum,idxTerm);
for (int i = 0; i < forms.size(); i++) {
Formula f = forms.get(i);
if (!accumulator.contains(f)) {
String arg = f.getArgument(0);
if (relns.contains(arg))
accumulator.add(f);
}
}
ans.addAll(accumulator);
}
return ans;
}
/** *************************************************************
* Returns an ArrayList containing SUO-KIF constants, possibly
* retrieved via multiple asks that recursively use relation and
* all of its subrelations.
*
* @param relation The name of a predicate, which is assumed to be
* the 0th argument of one or more atomic
* Formulae
*
* @param idxArgnum The argument position occupied by term in the
* ground atomic Formulae that will be retrieved
* to gather the target (answer) terms
*
* @param idxTerm A constant that occupies idxArgnum position in
* each of the ground atomic Formulae that will be
* retrieved to gather the target (answer) terms
*
* @param targetArgnum The argument position of the answer terms
* in the Formulae to be retrieved
*
* @param useInverses If true, the inverses of relation and its
* subrelations will be also be used to try to
* find answer terms
*
* @param predicatesUsed A Set to which will be added the
* predicates of the ground assertions
* actually used to gather the terms
* returned
*
* @return an ArrayList of terms (SUO-KIF constants), or an
* empy ArrayList if no terms can be retrieved
*/
public ArrayList getTermsViaPredicateSubsumption(String relation,
int idxArgnum,
String idxTerm,
int targetArgnum,
boolean useInverses,
Set predicatesUsed) {
ArrayList ans = new ArrayList();
if (StringUtil.isNonEmptyString(relation)
&& StringUtil.isNonEmptyString(idxTerm)
&& (idxArgnum >= 0)
// && (idxArgnum < 7)
) {
TreeSet reduced = new TreeSet();
List inverseSyns = null;
List inverses = null;
if (useInverses) {
inverseSyns = getTermsViaAskWithRestriction(0,"subrelation",2,
"inverse",1);
inverseSyns.addAll(getTermsViaAskWithRestriction(0,"equal",2,
"inverse",1));
inverseSyns.addAll(getTermsViaAskWithRestriction(0,"equal",
1,"inverse",2));
inverseSyns.add("inverse");
SetUtil.removeDuplicates(inverseSyns);
inverses = new ArrayList();
}
List accumulator = new ArrayList();
List predicates = new ArrayList();
predicates.add(relation);
while (!predicates.isEmpty()) {
for (String pred : predicates) {
reduced.addAll(getTermsViaAskWithRestriction(0,pred,idxArgnum,
idxTerm,targetArgnum,predicatesUsed));
accumulator.addAll(getTermsViaAskWithRestriction(0,"subrelation",2,
pred,1));
accumulator.addAll(getTermsViaAskWithRestriction(0,"equal",2,
"subrelation",1));
accumulator.addAll(getTermsViaAskWithRestriction(0,"equal",1,
"subrelation",2));
accumulator.remove(pred);
if (useInverses) {
for (String syn : inverseSyns) {
inverses.addAll(getTermsViaAskWithRestriction(0,syn,1,pred,2));
inverses.addAll(getTermsViaAskWithRestriction(0,syn,2,pred,1));
}
}
}
SetUtil.removeDuplicates(accumulator);
predicates.clear();
predicates.addAll(accumulator);
accumulator.clear();
}
if (useInverses) {
SetUtil.removeDuplicates(inverses);
for (String inv : inverses)
reduced.addAll(getTermsViaPredicateSubsumption(inv,targetArgnum,idxTerm,
idxArgnum,false,predicatesUsed));
}
ans.addAll(reduced);
}
return ans;
}
/** *************************************************************
* Returns an ArrayList containing SUO-KIF constants, possibly
* retrieved via multiple asks that recursively use relation and
* all of its subrelations.
*
* @param relation The name of a predicate, which is assumed to be
* the 0th argument of one or more atomic
* Formulae
*
* @param idxArgnum The argument position occupied by term in the
* ground atomic Formulae that will be retrieved
* to gather the target (answer) terms
*
* @param idxTerm A constant that occupies idxArgnum position in
* each of the ground atomic Formulae that will be
* retrieved to gather the target (answer) terms
*
* @param targetArgnum The argument position of the answer terms
* in the Formulae to be retrieved
*
* @param useInverses If true, the inverses of relation and its
* subrelations will be also be used to try to
* find answer terms
*
* @return an ArrayList of terms (SUO-KIF constants), or an
* empy ArrayList if no terms can be retrieved
*/
public ArrayList getTermsViaPredicateSubsumption(String relation,
int idxArgnum,
String idxTerm,
int targetArgnum,
boolean useInverses) {
return getTermsViaPredicateSubsumption(relation,
idxArgnum,
idxTerm,
targetArgnum,
useInverses,
null);
}
/** *************************************************************
* Returns the first SUO-KIF constant found via asks using
* relation and its subrelations.
*
* @param relation The name of a predicate, which is assumed to be
* the 0th argument of one or more atomic
* Formulae.
*
* @param idxArgnum The argument position occupied by term in the
* ground atomic Formulae that will be retrieved
* to gather the target (answer) terms.
*
* @param idxTerm A constant that occupies idxArgnum position in
* each of the ground atomic Formulae that will be
* retrieved to gather the target (answer) terms.
*
* @param targetArgnum The argument position of the answer terms
* in the Formulae to be retrieved.
*
* @param useInverses If true, the inverses of relation and its
* subrelations will be also be used to try to
* find answer terms.
*
* @return A SUO-KIF constants (String), or null if no term can be
* retrieved.
*/
public String getFirstTermViaPredicateSubsumption(String relation,
int idxArgnum,
String idxTerm,
int targetArgnum,
boolean useInverses) {
String ans = null;
if (StringUtil.isNonEmptyString(relation)
&& StringUtil.isNonEmptyString(idxTerm)
&& (idxArgnum >= 0)
// && (idxArgnum < 7)
) {
ArrayList terms = getTermsViaPredicateSubsumption(relation,
idxArgnum,idxTerm,targetArgnum,useInverses);
if (!terms.isEmpty())
ans = (String) terms.get(0);
}
return ans;
}
/** *************************************************************
* Returns an ArrayList containing the transitive closure of
* relation starting from idxTerm in position idxArgnum. The
* result does not contain idxTerm.
*
* @param relation The name of a predicate, which is assumed to be
* the 0th argument of one or more atomic
* Formulae
*
* @param idxArgnum The argument position occupied by term in the
* ground atomic Formulae that will be retrieved
* to gather the target (answer) terms
*
* @param idxTerm A constant that occupies idxArgnum position in
* the first "level" of ground atomic Formulae that
* will be retrieved to gather the target (answer)
* terms
*
* @param targetArgnum The argument position of the answer terms
* in the Formulae to be retrieved
*
* @param useInverses If true, the inverses of relation and its
* subrelations will be also be used to try to
* find answer terms
*
* @return an ArrayList of terms (SUO-KIF constants), or an
* empy ArrayList if no terms can be retrieved
*/
public ArrayList getTransitiveClosureViaPredicateSubsumption(String relation, int idxArgnum,
String idxTerm, int targetArgnum,
boolean useInverses) {
ArrayList ans = new ArrayList();
Set reduced = new TreeSet();
Set accumulator =
new TreeSet(getTermsViaPredicateSubsumption(relation, idxArgnum, idxTerm,
targetArgnum, useInverses));
ArrayList working = new ArrayList();
while (!accumulator.isEmpty()) {
reduced.addAll(accumulator);
working.clear();
working.addAll(accumulator);
accumulator.clear();
for (String term : working)
accumulator.addAll(getTermsViaPredicateSubsumption(relation,
idxArgnum,term,targetArgnum,useInverses));
}
ans.addAll(reduced);
return ans;
}
/** *************************************************************
* Merges a KIF object containing a single formula into the current KB.
*
* @param kif A KIF object.
*
* @param pathname The full, canonical pathname string of the
* constituent file in which the formula will be saved, if known.
*
* @return If any of the formulas are already present, returns an
* ArrayList containing the old (existing) formulas, else returns
* an empty ArrayList.
*/
public ArrayList merge(KIF kif, String pathname) {
ArrayList formulasPresent = new ArrayList();
// Add all the terms from the new formula into the KB's current list
getTerms().addAll(kif.terms);
Set keys = kif.formulas.keySet();
Iterator it = keys.iterator();
while (it.hasNext()) {
String key = it.next();
ArrayList newFormulas = new ArrayList(kif.formulas.get(key));
if (formulas.containsKey(key)) {
ArrayList oldFormulas = formulas.get(key);
for (int i = 0; i < newFormulas.size(); i++) {
Formula newFormula = kif.formulaMap.get(newFormulas.get(i));
if (pathname != null)
newFormula.sourceFile = pathname;
boolean found = false;
for (int j = 0; j < oldFormulas.size(); j++) {
Formula oldFormula = formulaMap.get(oldFormulas.get(j));
if (oldFormula != null && newFormula.theFormula.equals(oldFormula.theFormula)) {
found = true;
// no duplicate formulas are allowed in formulasPresent
if (formulasPresent!=null && !formulasPresent.contains(oldFormula))
formulasPresent.add(oldFormula);
}
}
if (!found) {
oldFormulas.add(newFormula.theFormula);
formulaMap.put(newFormula.theFormula.intern(), newFormula);
}
}
}
else {
formulas.put(key,newFormulas);
Iterator it2 = newFormulas.iterator();
Formula f = null;
while (it2.hasNext()) {
String newformulaStr = it2.next();
Formula newFormula = kif.formulaMap.get(newformulaStr);
f = formulaMap.get(newformulaStr);
if (f == null) // If kb.formulaMap does not contain the new formula, should we add it into the kb?
formulaMap.put(newFormula.theFormula.intern(), newFormula);
else if (StringUtil.isNonEmptyString(f.theFormula))
formulaMap.put(f.theFormula.intern(), f);
}
}
}
return formulasPresent;
}
/** *************************************************************
* Rename term2 as term1 throughout the knowledge base. This
* is an operation with side effects - the term names in the KB
* are changed.
*/
public void rename(String term2, String term1) {
HashSet formulas = new HashSet();
for (int i = 0; i < 7; i++)
formulas.addAll(ask("arg",i,term2));
formulas.addAll(ask("ant",0,term2));
formulas.addAll(ask("cons",0,term2));
formulas.addAll(ask("stmt",0,term2));
Iterator it = formulas.iterator();
while (it.hasNext()) {
Formula f = it.next();
f.theFormula = f.rename(term2,term1).theFormula;
}
}
/** *************************************************************
* Writes a single user assertion (String) to the end of a file.
*
* @param formula A String representing a SUO-KIF Formula.
* @param fname A String denoting the pathname of the target file.
* @return A long value indicating the number of bytes in the file
* after the formula has been written. A value of 0L means that
* the file does not exist, and so could not be written for some
* reason. A value of -1 probably means that some error occurred.
*/
private long writeUserAssertion(String formula, String fname) throws IOException {
long flen = -1L;
FileWriter fr = null;
try {
File file = new File(fname);
fr = new FileWriter(file,true);
fr.write(formula);
fr.write("\n");
flen = file.length();
}
catch (java.io.IOException e) {
e.printStackTrace();
}
finally {
if (fr != null) fr.close();
}
return flen;
}
/** *************************************************************
* Writes all the terms in the knowledge base to a file
*/
public void writeTerms() throws IOException {
String fname = KBmanager.getMgr().getPref("kbDir") + File.separator + "terms.txt";
FileWriter fr = null;
try {
File file = new File(fname);
fr = new FileWriter(file,true);
Iterator it = terms.iterator();
while (it.hasNext()) {
String term = it.next();
fr.write(term);
fr.write("\n");
}
}
catch (java.io.IOException e) {
e.printStackTrace();
}
finally {
if (fr != null) fr.close();
}
}
/** *************************************************************
* Adds a formula to the knowledge base. Returns an XML formatted
* String that contains the response of the inference engine. It
* should be of the form "... "
* where the body should be " Formula has been added to the session
* database" if all went well.
*
* TODO: If we find a way to directly add assertions into opened inference engine, we can roll back to 1.111 version
*
* @param input The String representation of a SUO-KIF Formula.
*
* @return A String indicating the status of the tell operation.
*/
public String tell(String input) {
String result = "The formula could not be added";
KBmanager mgr = KBmanager.getMgr();
KIF kif = new KIF(); // 1. Parse the input string.
String msg = kif.parseStatement(input);
if (msg != null) {
result = "Error parsing \"" + input + "\" " + msg;
return result;
}
if (kif.formulaMap.keySet().isEmpty()) {
result = "The input could not be parsed";
return result;
}
try { // Make the pathname of the user assertions file.
String userAssertionKIF = this.name + _userAssertionsString;
String userAssertionTPTP = userAssertionKIF.substring(0, userAssertionKIF.indexOf(".kif")) + ".tptp";
File dir = new File(this.kbDir);
File kiffile = new File(dir, (userAssertionKIF)); // create kb.name_UserAssertions.kif
File tptpfile = new File(dir, (userAssertionTPTP)); // create kb.name_UserAssertions.tptp
String filename = kiffile.getCanonicalPath();
ArrayList formulasAlreadyPresent = merge(kif, filename);
// only check formulasAlreadyPresent when filterSimpleOnly = false;
// otherwise, some user assertions/axioms will not be asserted for inference,
// since these axioms do exist in formulasAlreadyPresent but not in SUMO.tptp
// In the future, when SUMO can completely run using whole KB, we can remove
// SUMOKBtoTPTPKB.fitlerSimpleOnly==false;
if (SUMOKBtoTPTPKB.filterSimpleOnly==false && !formulasAlreadyPresent.isEmpty()) {
String sf = ((Formula)formulasAlreadyPresent.get(0)).sourceFile;
result = "The formula was already added from " + sf;
}
else {
ArrayList parsedFormulas = new ArrayList();
Iterator it = kif.formulaMap.values().iterator();
while (it.hasNext()) { // 2. Confirm that the input has been converted into
// at least one Formula object and stored in this.formulaMap.
Formula parsedF = it.next();
String term = PredVarInst.hasCorrectArity(parsedF,this);
if (!StringUtil.emptyString(term)) {
result = result + "Formula in " + parsedF.sourceFile +
" rejected due to arity error of predicate " + term +
" in formula: \n" + parsedF.theFormula;
}
else
parsedFormulas.add(parsedF);
}
if (!parsedFormulas.isEmpty()) {
if (!constituents.contains(filename)) {
if (kiffile.exists()) // 3. If the assertions file exists, delete it.
kiffile.delete();
if (tptpfile.exists())
tptpfile.delete();
constituents.add(filename);
//mgr.writeConfiguration();
}
Iterator pfit = parsedFormulas.iterator();
while (pfit.hasNext()) {
Formula parsedF = pfit.next();
// 4. Write the formula to the user assertions file.
parsedF.endFilePosition = writeUserAssertion(parsedF.theFormula,filename);
parsedF.sourceFile = filename;
}
result = "The formula has been added for browsing";
// 5. Write the formula to the kb.name_UserAssertions.tptp
boolean allAdded = eprover.assertFormula(tptpfile.getCanonicalPath(), this, eprover,
parsedFormulas, !mgr.getPref("TPTP").equalsIgnoreCase("no"));
// 6. Add the new tptp file into EBatching.txt
eprover.addBatchConfig(tptpfile.getCanonicalPath(), 60);
// 7. Reload eprover
eprover = new EProver(mgr.getPref("inferenceEngine"));
result += (allAdded ? " and inference" : " but not for local inference");
}
}
}
catch (IOException ioe) {
ioe.printStackTrace();
System.out.println(ioe.getMessage());
result = ioe.getMessage();
}
return result;
}
/** *************************************************************
* Submits a query to the inference engine. Returns an XML
* formatted String that contains the response of the inference
* engine. It should be in the form
* "... ".
*
* @param suoKifFormula The String representation of the SUO-KIF
* query.
*
* @param timeout The number of seconds after which the inference
* engine should give up.
*
* @param maxAnswers The maximum number of answers (binding sets)
* the inference engine should return.
*
* @return A list of answers.
*/
public ArrayList ask(String suoKifFormula, int timeout, int maxAnswers) {
String result = "";
// Start by assuming that the ask is futile.
result = ("" + System.getProperty("line.separator")
+ " " + System.getProperty("line.separator")
+ " " + System.getProperty("line.separator")
+ " " + System.getProperty("line.separator"));
if (StringUtil.isNonEmptyString(suoKifFormula)) {
Formula query = new Formula();
query.read(suoKifFormula);
FormulaPreprocessor fp = new FormulaPreprocessor();
ArrayList processedStmts = fp.preProcess(query,true, this);
if (!processedStmts.isEmpty() && this.eprover != null) {
// set timeout in EBatchConfig file and reload eprover
try {
eprover.addBatchConfig(null, timeout);
eprover = new EProver(KBmanager.getMgr().getPref("inferenceEngine"));
} catch (IOException e) {
e.printStackTrace();
}
String strQuery = processedStmts.get(0).theFormula;
result = this.eprover.submitQuery(strQuery,this);
if (result==null || result.isEmpty())
System.out.println("No response from EProver!");
else
System.out.println("Get response from EProver, start for parsing ...");
//System.out.println("Results returned from E = \n" + EResult);
ArrayList answers = TPTP3ProofProcessor.parseAnswerTuples(result, this, fp);
return answers;
}
}
return null;
}
/** *************************************************************
* Submits a query to the inference engine. Returns an XML
* formatted String that contains the response of the inference
* engine. It should be in the form
* "... ".
*
* @param suoKifFormula The String representation of the SUO-KIF
* query.
*
* @param timeout The number of seconds after which the inference
* engine should give up.
*
* @param maxAnswers The maximum number of answers (binding sets)
* the inference engine should return.
*
* @return A String indicating the status of the ask operation.
*/
public String askEProver(String suoKifFormula, int timeout, int maxAnswers) {
String result = "";
// Start by assuming that the ask is futile.
result = ("" + System.getProperty("line.separator")
+ " " + System.getProperty("line.separator")
+ " " + System.getProperty("line.separator")
+ " " + System.getProperty("line.separator"));
if (StringUtil.isNonEmptyString(suoKifFormula)) {
Formula query = new Formula();
query.read(suoKifFormula);
FormulaPreprocessor fp = new FormulaPreprocessor();
ArrayList processedStmts = fp.preProcess(query,true, this);
if (!processedStmts.isEmpty() && this.eprover != null) {
String strQuery = processedStmts.get(0).theFormula;
result = this.eprover.submitQuery(strQuery,this);
}
if (!processedStmts.isEmpty() && this.eprover != null) {
// set timeout in EBatchConfig file and reload eprover
try {
eprover.addBatchConfig(null, timeout);
eprover = new EProver(KBmanager.getMgr().getPref("inferenceEngine"));
} catch (IOException e) {
e.printStackTrace();
}
String strQuery = processedStmts.get(0).theFormula;
result = this.eprover.submitQuery(strQuery,this);
}
}
return result;
}
/** *************************************************************
* Submits a query to the inference engine. Returns a list of
* answers from inference engine. If no proof is found, return null;
*
* @param suoKifFormula The String representation of the SUO-KIF
* query.
*
* @return A list of answers from inference engine; If no proof
* or answer is found, return null;
*/
public ArrayList askNoProof(String suoKifFormula, int timeout, int maxAnswers) {
ArrayList answers = new ArrayList();
if (StringUtil.isNonEmptyString(suoKifFormula)) {
Formula query = new Formula();
query.read(suoKifFormula);
FormulaPreprocessor fp = new FormulaPreprocessor();
ArrayList processedStmts = fp.preProcess(query,true, this);
if (!processedStmts.isEmpty() && this.eprover != null) {
// set timeout in EBatchConfig file and reload eprover
try {
eprover.addBatchConfig(null, timeout);
eprover = new EProver(KBmanager.getMgr().getPref("inferenceEngine"));
} catch (IOException e) {
e.printStackTrace();
}
String strQuery = processedStmts.get(0).theFormula;
String EResult = this.eprover.submitQuery(strQuery,this);
if (EResult==null || EResult.isEmpty())
System.out.println("No response from EProver!");
else
System.out.println("Get response from EProver, start for parsing ...");
//System.out.println("Results returned from E = \n" + EResult);
answers = TPTP3ProofProcessor.parseAnswerTuples(EResult, this, fp);
return answers;
}
}
return null;
}
/** *************************************************************
* Submits a query to specified InferenceEngine object. Returns an XML
* formatted String that contains the response of the inference
* engine. It should be in the form
* "... ".
*
* @param suoKifFormula The String representation of the SUO-KIF
* query.
*
* @param timeout The number of seconds after which the underlying inference
* engine should give up. (Time taken by axiom selection doesn't count.)
*
* @param maxAnswers The maximum number of answers (binding sets)
* the inference engine should return.
*
* @param engine InferenceEngine object that will be used for the inference.
*
* @return A String indicating the status of the ask operation.
*/
public String askEngine(String suoKifFormula, int timeout, int maxAnswers, InferenceEngine engine) {
String result = "";
// Start by assuming that the ask is futile.
result = "\n\n \n\n \n";
if (!StringUtil.emptyString(suoKifFormula)) {
Formula query = new Formula();
query.read(suoKifFormula);
FormulaPreprocessor fp = new FormulaPreprocessor();
ArrayList processedStmts = fp.preProcess(query,true, this);
try {
if (!processedStmts.isEmpty()) {
String strQuery = processedStmts.get(0).theFormula;
result = engine.submitQuery(strQuery,timeout,maxAnswers);
}
}
catch (IOException ioe) {
ioe.printStackTrace();
String message = ioe.getMessage().replaceAll(":","&58;");
errors.add(message);
result = ioe.getMessage();
}
}
result = result.replaceAll("<","<");
result = result.replaceAll(">",">");
return result;
}
/** *************************************************************
* Submits a query to the SInE inference engine. Returns an XML
* formatted String that contains the response of the inference
* engine. It should be in the form
* "... ".
*
* @param suoKifFormula The String representation of the SUO-KIF
* query.
*
* @param timeout The number of seconds after which the underlying inference
* engine should give up. (Time taken by axiom selection doesn't count.)
*
* @param maxAnswers The maximum number of answers (binding sets)
* the inference engine should return.
*
* @return A String indicating the status of the ask operation.
*/
public String askSInE(String suoKifFormula, int timeout, int maxAnswers) {
String result = "";
InferenceEngine.EngineFactory factory = SInE.getFactory();
InferenceEngine engine = createInferenceEngine(factory);
result = askEngine(suoKifFormula, timeout, maxAnswers, engine);
try {
if (engine != null)
engine.terminate();
}
catch (IOException ioe) {
ioe.printStackTrace();
String message = ioe.getMessage().replaceAll(":","&58;");
errors.add(message);
result = ioe.getMessage();
}
return result;
}
/** *************************************************************
* Submits a query to the LEO inference engine. Returns an XML
* formatted String that contains the response of the inference
* engine. It should be in the form
* "... ".
*
* @param suoKifFormula The String representation of the SUO-KIF
* query.
*
* @param timeout The number of seconds after which the underlying inference
* engine should give up. (Time taken by axiom selection doesn't count.)
*
* @param maxAnswers The maximum number of answers (binding sets)
* the inference engine should return.
*
* @return A String indicating the status of the ask operation.
*/
public String askLEO(String suoKifFormula, int timeout, int maxAnswers, String flag) {
String result = "";
try {
String LeoExecutable = KBmanager.getMgr().getPref("leoExecutable");
String LeoInput = KBmanager.getMgr().getPref("inferenceTestDir") + "prob.p";
String LeoProblem;
String responseLine;
String LeoOutput = "";
File LeoExecutableFile = new File(LeoExecutable);
File LeoInputFile = new File(LeoInput);
FileWriter LeoInputFileW = new FileWriter(LeoInput);
List selectedQuery = new ArrayList();
Formula newQ = new Formula();
newQ.read(suoKifFormula);
selectedQuery.add(newQ);
List selFs = null;
if (flag.equals("LeoSine")) {
SInE sine = new SInE(this.formulaMap.keySet());
selFs = new ArrayList(sine.performSelection(suoKifFormula));
sine.terminate();
}
else if (flag.equals("LeoLocal"))
selFs = new ArrayList();
else if (flag.equals("LeoGlobal")) {
selFs = new ArrayList();
Iterator it = this.formulaMap.values().iterator();
while (it.hasNext()) {
Formula entry = it.next();
selFs.add(entry.toString());
}
}
try { // add user asserted formulas
File dir = new File(this.kbDir);
File file = new File(dir, (this.name + _userAssertionsString));
String filename = file.getCanonicalPath();
BufferedReader userAssertedInput = new BufferedReader(new FileReader(filename));
try {
String line = null;
/* readLine is a bit quirky :
* it returns the content of a line MINUS the newline.
* it returns null only for the END of the stream.
* it returns an empty String if two newlines appear in a row.
*/
while ((line = userAssertedInput.readLine()) != null)
selFs.add(line);
}
finally {
userAssertedInput.close();
}
}
catch (IOException ex){
System.out.println("Error in KB.askLEO(): " + ex.getMessage());
ex.printStackTrace();
}
List selectedFormulas = new ArrayList();
Formula newF = new Formula();
Iterator it = selFs.iterator();
while (it.hasNext()) {
String entry = it.next();
newF = new Formula();
newF.read(entry);
selectedFormulas.add(newF);
}
System.out.println(selFs.toString());
THF thf = new THF();
LeoProblem = thf.KIF2THF(selectedFormulas,selectedQuery,this);
LeoInputFileW.write(LeoProblem);
LeoInputFileW.close();
String command = LeoExecutableFile.getCanonicalPath() + " -po 1 -t " + timeout + " " + LeoInputFile.getCanonicalPath();
Process leo = Runtime.getRuntime().exec(command);
BufferedReader reader = new BufferedReader(new InputStreamReader(leo.getInputStream()));
while ((responseLine = reader.readLine()) != null)
LeoOutput += responseLine + "\n";
reader.close();
System.out.println(LeoOutput);
if (LeoOutput.contains("SZS status Theorem")) {
result = "Answer 1. yes"
+ "
" + LeoProblem.replaceAll("\\n","
")
+ "
" + LeoOutput.replaceAll("\\n","
");
}
else {
result = "Answer 1. don't know"
+ "
" + LeoProblem.replaceAll("\\n","
")
+ "
" + LeoOutput.replaceAll("\\n","
");
}
}
catch (Exception ex) {
System.out.println("Error in KB.askLEO(): " + ex.getMessage());
ex.printStackTrace();
}
return result;
}
/** ***************************************************************
* Takes a term and returns true if the term occurs in the KB.
*
* @param term A String.
* @return true or false.
*/
public boolean containsTerm(String term) {
if (getTerms().contains(term.intern()))
return true;
else if (getREMatch(term.intern()).size()==1)
return true;
return false;
}
/** ***************************************************************
* Takes a formula string and returns true if the corresponding
* Formula occurs in the KB.
*
* @param formula A String.
* @return true or false.
*/
public boolean containsFormula(String formula) {
return formulaMap.containsKey(formula.intern());
}
/** ***************************************************************
* Count the number of terms in the knowledge base in order to
* present statistics to the user.
*
* @return The int(eger) number of terms in the knowledge base.
*/
public int getCountTerms() {
return getTerms().size();
}
/** ***************************************************************
* Count the number of relations in the knowledge base in order to
* present statistics to the user.
*
* @return The int(eger) number of relations in the knowledge base.
*/
public int getCountRelations() {
return kbCache.relations.size();
}
/** ***************************************************************
* Count the number of formulas in the knowledge base in order to
* present statistics to the user.
*
* @return The int(eger) number of formulas in the knowledge base.
*/
public int getCountAxioms() {
return formulaMap.size();
}
/** ***************************************************************
* An accessor providing a TreeSet of un-preProcessed String
* representations of Formulae.
*
* @return A TreeSet of Strings.
*/
public TreeSet getFormulas() {
return new TreeSet(formulaMap.keySet());
}
/** ***************************************************************
* An accessor providing a Formula
*/
public Formula getFormulaByKey(String key) {
Formula f = null;
ArrayList al = formulas.get(key);
if ((al != null) && !al.isEmpty())
f = formulaMap.get(al.get(0));
return f;
}
/** ***************************************************************
* Count the number of rules in the knowledge base in order to
* present statistics to the user. Note that the number of rules
* is a subset of the number of formulas.
*
* @return The int(eger) number of rules in the knowledge base.
*/
public int getCountRules() {
int count = 0;
Iterator it = formulaMap.values().iterator();
while (it.hasNext()) {
Formula f = it.next();
if (f.isRule())
count++;
}
return count;
}
/** ***************************************************************
* Create an ArrayList of the specific size, filled with empty strings.
*/
private ArrayList arrayListWithBlanks(int size) {
ArrayList al = new ArrayList(size);
for (int i = 0; i < size; i++)
al.add("");
return al;
}
/** ***************************************************************
* Get the alphabetically nearest terms to the given term, which
* is not in the KB. Elements 0-(k-1) should be alphabetically
* lesser and k-(2*k-1) alphabetically greater. If the term is
* at the beginning or end of the alphabet, fill in blank items
* with the empty string: "".
*/
private ArrayList getNearestKTerms(String term, int k) {
ArrayList al;
if (k == 0)
al = arrayListWithBlanks(1);
else
al = arrayListWithBlanks(2*k);
Object[] t;
t = getTerms().toArray();
int i = 0;
while (i < t.length-1 && ((String) t[i]).compareTo(term) < 0)
i++;
if (k == 0) {
al.set(0,(String) t[i]);
return al;
}
int lower = i;
while (i - lower < k && lower > 0) {
lower--;
al.set(k - (i - lower),(String) t[lower]);
}
int upper = i-1;
while (upper - i < (k-1) && upper < t.length-1) {
upper++;
al.set(k + (upper - i),(String) t[upper]);
}
return al;
}
/** ***************************************************************
* Get the alphabetically nearest terms to the given term, which
* is not in the KB. Elements 0-14 should be alphabetically lesser and
* 15-29 alphabetically greater. If the term is at the beginning or end
* of the alphabet, fill in blank items with the empty string: "".
*/
private ArrayList getNearestTerms(String term) {
return getNearestKTerms(term,15);
}
/** ***************************************************************
* Get the neighbors of this initial uppercase term (class or function).
*/
public ArrayList getNearestRelations(String term) {
term = Character.toUpperCase(term.charAt(0)) + term.substring(1,term.length());
return getNearestTerms(term);
}
/** ***************************************************************
* Get the neighbors of this initial lowercase term (relation).
*/
public ArrayList getNearestNonRelations(String term) {
term = Character.toLowerCase(term.charAt(0)) + term.substring(1,term.length());
return getNearestTerms(term);
}
/** ***************************************************************
* Get the alphabetically num lower neighbor of this initial term, which
* must exist in the current KB otherwise an empty string is returned.
*/
public String getAlphaBefore(String term, int num) {
if (!getTerms().contains(term)) {
ArrayList al = getNearestKTerms(term,0);
term = (String) al.get(0);
}
if (getTerms().size() < 1)
return "";
ArrayList tal = new ArrayList(getTerms());
int i = tal.indexOf(term.intern());
if (i < 0)
return "";
i = i - num;
if (i < 0)
i = 0;
return (String) tal.get(i);
}
/** ***************************************************************
* Get the alphabetically num higher neighbor of this initial term, which
* must exist in the current KB otherwise an empty string is returned.
*/
public String getAlphaAfter(String term, int num) {
if (!getTerms().contains(term)) {
ArrayList al = getNearestKTerms(term,0);
term = (String) al.get(0);
}
if (getTerms().size() < 1)
return "";
ArrayList tal = new ArrayList(getTerms());
int i = tal.indexOf(term.intern());
if (i < 0)
return "";
i = i + num;
if (i >= tal.size())
i = tal.size() - 1;
return (String) tal.get(i);
}
/** ***************************************************************
* This List is used to limit the number of warning messages
* logged by loadFormatMaps(lang). If an attempt to load format
* or termFormat values for lang is unsuccessful, the list is
* checked for the presence of lang. If lang is not in the list,
* a warning message is logged and lang is added to the list. The
* list is cleared whenever a constituent file is added or removed
* for KB, since the latter might affect the availability of
* format or termFormat values.
*/
protected ArrayList loadFormatMapsAttempted = new ArrayList();
/** ***************************************************************
* Populates the format maps for language lang.
*
* @see termFormatMap is a HashMap of language keys and HashMap
* values. The interior HashMaps are term keys and format
* string values.
*
* @see formatMap is the same but for relation format strings.
*/
public void loadFormatMaps(String lang) {
if (formatMap == null)
formatMap = new HashMap>();
if (termFormatMap == null)
termFormatMap = new HashMap>();
if (formatMap.get(lang) == null)
formatMap.put(lang, new HashMap());
if (termFormatMap.get(lang) == null)
termFormatMap.put(lang, new HashMap());
if (!loadFormatMapsAttempted.contains(lang)) {
ArrayList col = askWithRestriction(0,"format",1,lang);
if ((col == null) || col.isEmpty())
System.out.println("Error in KB.loadFormatMaps(): No relation format file loaded for language " + lang);
else {
HashMap langFormatMap = formatMap.get(lang);
Iterator ite = col.iterator();
while (ite.hasNext()) {
Formula f = (Formula) ite.next();
String key = f.getArgument(2);
String format = f.getArgument(3);
format = StringUtil.removeEnclosingQuotes(format);
langFormatMap.put(key, format);
}
}
col = askWithRestriction(0,"termFormat",1,lang);
if ((col == null) || col.isEmpty())
System.out.println("Error in KB.loadFormatMaps(): No term format file loaded for language: " + lang);
else {
HashMap langTermFormatMap = termFormatMap.get(lang);
Iterator ite = col.iterator();
while (ite.hasNext()) {
Formula f = (Formula) ite.next();
String key = f.getArgument(2);
String format = f.getArgument(3);
format = StringUtil.removeEnclosingQuotes(format);
langTermFormatMap.put(key,format);
}
}
loadFormatMapsAttempted.add(lang);
}
language = lang;
}
/** ***************************************************************
* Clears all loaded format and termFormat maps, for all
* languages.
*/
protected void clearFormatMaps() {
if (formatMap != null) {
Iterator> itf = formatMap.values().iterator();
while (itf.hasNext()) {
HashMap m = itf.next();
if (m != null) m.clear();
}
formatMap.clear();
}
if (termFormatMap != null) {
Iterator> itf = termFormatMap.values().iterator();
while (itf.hasNext()) {
HashMap m = itf.next();
if (m != null) m.clear();
}
termFormatMap.clear();
}
loadFormatMapsAttempted.clear();
return;
}
/** ***************************************************************
* This method creates a dictionary (Map) of SUO-KIF term symbols
* -- the keys -- and a natural language string for each key that
* is the preferred name for the term -- the values -- in the
* context denoted by lang. If the Map has already been built and
* the language hasn't changed, just return the existing map.
* This is a case of "lazy evaluation".
*
* @return An instance of Map where the keys are terms and the
* values are format strings.
*/
public HashMap getTermFormatMap(String lang) {
if (!StringUtil.isNonEmptyString(lang))
lang = "EnglishLanguage";
if ((termFormatMap == null) || termFormatMap.isEmpty())
loadFormatMaps(lang);
HashMap langTermFormatMap = termFormatMap.get(lang);
if ((langTermFormatMap == null) || langTermFormatMap.isEmpty())
loadFormatMaps(lang);
return (HashMap ) termFormatMap.get(lang);
}
/** ***************************************************************
* This method creates an association list (Map) of the natural
* language format string and the relation name for which that
* format string applies. If the map has already been built and
* the language hasn't changed, just return the existing map.
* This is a case of "lazy evaluation".
*
* @return An instance of Map where the keys are relation names
* and the values are format strings.
*/
public HashMap getFormatMap(String lang) {
if (!StringUtil.isNonEmptyString(lang))
lang = "EnglishLanguage";
if ((formatMap == null) || formatMap.isEmpty())
loadFormatMaps(lang);
HashMap langFormatMap = formatMap.get(lang);
if ((langFormatMap == null) || langFormatMap.isEmpty())
loadFormatMaps(lang);
return formatMap.get(lang);
}
/** ***************************************************************
* Deletes user assertions, both in the files and in the constituents list.
*/
public void deleteUserAssertions() throws IOException {
String toRemove = null;
for (String name : constituents) {
if (name.endsWith(_userAssertionsString)) {
toRemove = name;
break;
}
}
// Remove the string from the list.
if(toRemove != null) {
constituents.remove(toRemove);
}
}
/** ***************************************************************
* Deletes the user assertions key in the constituents map, and then reloads the KBs.
*/
public void deleteUserAssertionsAndReload() {
String cname = null;
for (int i = 0 ; i < constituents.size() ; i++) {
cname = (String) constituents.get(i);
if (cname.endsWith(_userAssertionsString)) {
try {
constituents.remove(i);
KBmanager.getMgr().writeConfiguration();
reload();
}
catch (IOException ioe) {
System.out.println("Error in KB.deleteUserAssertionsAndReload(): writing configuration: " + ioe.getMessage());
}
}
}
}
/** *************************************************************
* Add a new KB constituent by reading in the file, and then merging
* the formulas with the existing set of formulas.
*
* @param filename - The full path of the file being added
*/
public void addConstituent(String filename) {
//, boolean buildCachesP, boolean loadEProverP, boolean performArity) {
System.out.println("INFO in KB.addConstituent(): " + filename);
String canonicalPath = null;
KIF file = new KIF();
try {
if (filename.endsWith(".owl") || filename.endsWith(".OWL") ||
filename.endsWith(".rdf") || filename.endsWith(".RDF")) {
OWLtranslator.read(filename);
filename = filename + ".kif";
}
File constituent = new File(filename);
canonicalPath = constituent.getCanonicalPath();
if (constituents.contains(canonicalPath))
errors.add("Error. " + canonicalPath + " already loaded.");
file.readFile(canonicalPath);
errors.addAll(file.warningSet);
}
catch (Exception ex1) {
StringBuilder error = new StringBuilder();
error.append(ex1.getMessage());
if (ex1 instanceof ParseException)
error.append(" at line " + ((ParseException)ex1).getErrorOffset());
error.append(" in file " + canonicalPath);
errors.add(error.toString());
}
Iterator it = file.formulas.keySet().iterator();
int count = 0;
while (it.hasNext()) { // Iterate through keys.
String key = it.next();
if ((count++ % 100) == 1)
System.out.print(".");
ArrayList newlist = file.formulas.get(key);
// temporary debug test to find nulls
for (int i = 0; i < newlist.size(); i++) {
String form = newlist.get(i);
if (StringUtil.emptyString(form))
System.out.println("Error in KB.addConstituent() 1: formula is null ");
}
ArrayList list = formulas.get(key);
if (list != null) {
// temporary debug test to find nulls
for (int i = 0; i < list.size(); i++) {
String form = list.get(i);
if (StringUtil.emptyString(form))
System.out.println("Error in KB.addConstituent() 2: formula is null ");
}
newlist.addAll(list);
}
formulas.put(key, newlist);
}
count = 0;
Iterator it2 = file.formulaMap.values().iterator();
while (it2.hasNext()) { // Iterate through values
Formula f = (Formula) it2.next();
String internedFormula = f.theFormula.intern();
if ((count++ % 100) == 1)
System.out.print(".");
if (!formulaMap.containsKey(internedFormula))
formulaMap.put(internedFormula, f);
}
System.out.println("INFO in KB.addConstituent(): added " + file.formulaMap.values().size() +
" formulas and " + file.terms.size() + " terms.");
this.getTerms().addAll(file.terms);
if (!constituents.contains(canonicalPath))
constituents.add(canonicalPath);
//clearFormatMaps(); // Clear formatMap and termFormatMap for this KB.
//if (buildCachesP && !canonicalPath.endsWith(_cacheFileSuffix)) {
// kbCache = new KBcache(this);
// kbCache.buildCaches();
//}
//if (loadEProverP)
// loadEProver();
}
/** ***************************************************************
* Reload all the KB constituents.
*/
public String reload() {
ArrayList newConstituents = new ArrayList();
synchronized (this.getTerms()) {
Iterator ci = constituents.iterator();
while (ci.hasNext()) {
String cName = ci.next();
if (!cName.endsWith(_cacheFileSuffix)) // Recompute cached data
newConstituents.add(cName);
}
constituents.clear();
formulas.clear();
formulaMap.clear();
terms.clear();
clearFormatMaps();
errors.clear();
Iterator nci = newConstituents.iterator();
if (nci.hasNext()) System.out.println("INFO in KB.reload()");
while (nci.hasNext()) {
String cName = (String) nci.next();
addConstituent(cName);
//addConstituent(cName, false, false, false);
}
checkArity(); // Reperform arity checks on everything
// build kb cache when "cache" = "yes"
if (KBmanager.getMgr().getPref("cache").equalsIgnoreCase("yes")) {
kbCache = new KBcache(this);
kbCache.buildCaches();
} else {
kbCache = new KBcache(this);
}
// At this point, we have reloaded all constituents, have
// rebuilt the relation caches, and, if cache == yes, have
// written out the _Cache.kif file. Now we reload the
// inference engine.
loadEProver();
}
return "";
}
/** ***************************************************************
* Write a KIF file consisting of all the formulas in the
* knowledge base.
* @param fname - the name of the file to write, including full path.
*/
public void writeFile(String fname) throws IOException {
FileWriter fr = null;
PrintWriter pr = null;
HashSet formulaSet = new HashSet();
Iterator it = formulas.keySet().iterator();
while (it.hasNext()) {
String key = (String) it.next();
ArrayList list = formulas.get(key);
for (int i = 0; i < list.size(); i++) {
String s = list.get(i);
formulaSet.add(s);
}
}
try {
fr = new FileWriter(fname);
pr = new PrintWriter(fr);
it = formulaMap.keySet().iterator();
while (it.hasNext()) {
String s = (String) it.next();
pr.println(s);
pr.println();
}
}
catch (java.io.IOException e) {
System.out.println("Error in KB.writeFile(): Error writing file " + fname);
e.printStackTrace();
}
finally {
if (pr != null) { pr.close(); }
if (fr != null) { fr.close(); }
}
}
/** *************************************************************
* Create the XML configuration element.
*/
public SimpleElement writeConfiguration() {
SimpleElement se = new SimpleElement("kb");
se.setAttribute("name",name);
for (int i = 0; i < constituents.size(); i++) {
SimpleElement constituent = new SimpleElement("constituent");
String filename = (String) constituents.get(i);
filename = KBmanager.escapeFilename(filename);
constituent.setAttribute("filename",filename);
se.addChildElement(constituent);
}
return se;
}
/** *************************************************************
* A HashMap for holding compiled regular expression patterns.
* The map is initialized by calling compilePatterns().
*/
private static HashMap REGEX_PATTERNS = null;
/** ***************************************************************
* This method returns a compiled regular expression Pattern
* object indexed by key.
*
* @param key A String that is the retrieval key for a compiled
* regular expression Pattern.
*
* @return A compiled regular expression Pattern instance.
*/
public static Pattern getCompiledPattern(String key) {
if (StringUtil.isNonEmptyString(key) && (REGEX_PATTERNS != null)) {
ArrayList al = (ArrayList) REGEX_PATTERNS.get(key);
if (al != null)
return (Pattern) al.get(0);
}
return null;
}
/** ***************************************************************
* This method returns the int value that identifies the regular
* expression binding group to be returned when there is a match.
*
* @param key A String that is the retrieval key for the binding
* group index associated with a compiled regular expression
* Pattern.
*
* @return An int that indexes a binding group.
*/
public static int getPatternGroupIndex(String key) {
if (StringUtil.isNonEmptyString(key) && (REGEX_PATTERNS != null)) {
ArrayList al = (ArrayList) REGEX_PATTERNS.get(key);
if (al != null)
return ((Integer)al.get(1)).intValue();
}
return -1;
}
/** ***************************************************************
* This method compiles and stores regular expression Pattern
* objects and binding group indexes as two cell ArrayList
* objects. Each ArrayList is indexed by a String retrieval key.
*
* @return void
*/
private static void compilePatterns() {
if (REGEX_PATTERNS == null) {
REGEX_PATTERNS = new HashMap();
String[][] patternArray =
{ { "row_var", "\\@ROW\\d*", "0" },
// { "open_lit", "\\(\\w+\\s+\\?\\w+\\s+.\\w+\\s*\\)", "0" },
{ "open_lit", "\\(\\w+\\s+\\?\\w+[a-zA-Z_0-9-?\\s]+\\)", "0" },
{ "pred_var_1", "\\(holds\\s+(\\?\\w+)\\W", "1" },
{ "pred_var_2", "\\((\\?\\w+)\\W", "1" },
{ "var_with_digit_suffix", "(\\D+)\\d*", "1" }
};
String pName = null;
Pattern p = null;
Integer groupN = null;
ArrayList pVal = null;
for (int i = 0 ; i < patternArray.length ; i++) {
pName = patternArray[i][0];
p = Pattern.compile(patternArray[i][1]);
groupN = new Integer(patternArray[i][2]);
pVal = new ArrayList();
pVal.add(p);
pVal.add(groupN);
REGEX_PATTERNS.put(pName, pVal);
}
}
return;
}
/** ***************************************************************
* This method finds regular expression matches in an input string
* using a compiled Pattern and binding group index retrieved with
* patternKey. If the ArrayList accumulator is provided, match
* results are added to it and it is returned. If accumulator is
* not provided (is null), then a new ArrayList is created and
* returned if matches are found.
*
* @param input The input String in which matches are sought.
*
* @param patternKey A String used as the retrieval key for a
* regular expression Pattern object, and an int index identifying
* a binding group.
*
* @param accumulator An optional ArrayList to which matches are
* added. Note that if accumulator is provided, it will be the
* return value even if no new matches are found in the input
* String.
*
* @return An ArrayList, or null if no matches are found and an
* accumulator is not provided.
*/
public static ArrayList getMatches(String input, String patternKey, ArrayList accumulator) {
ArrayList ans = null;
if (accumulator != null)
ans = accumulator;
if (REGEX_PATTERNS == null)
KB.compilePatterns();
if (StringUtil.isNonEmptyString(input) && StringUtil.isNonEmptyString(patternKey)) {
Pattern p = KB.getCompiledPattern(patternKey);
if (p != null) {
Matcher m = p.matcher(input);
int gidx = KB.getPatternGroupIndex(patternKey);
if (gidx >= 0) {
while (m.find()) {
String rv = m.group(gidx);
if (StringUtil.isNonEmptyString(rv)) {
if (ans == null)
ans = new ArrayList();
if (!(ans.contains(rv)))
ans.add(rv);
}
}
}
}
}
return ans;
}
/** ***************************************************************
* This method finds regular expression matches in an input string
* using a compiled Pattern and binding group index retrieved with
* patternKey, and returns the results, if any, in an ArrayList.
*
* @param input The input String in which matches are sought.
*
* @param patternKey A String used as the retrieval key for a
* regular expression Pattern object, and an int index identifying
* a binding group.
*
* @return An ArrayList, or null if no matches are found.
*/
public static ArrayList getMatches(String input, String patternKey) {
return KB.getMatches(input, patternKey, null);
}
/** ***************************************************************
* This method retrieves Formulas by asking the query expression
* queryLit, and returns the results, if any, in an ArrayList.
*
* @param queryLit The query, which is assumed to be a List
* (atomic literal) consisting of a single predicate and its
* arguments. The arguments could be variables, constants, or a
* mix of the two, but only the first constant encountered in a
* left to right sweep over the literal will be used in the actual
* query.
*
* @return An ArrayList of Formula objects, or an empty ArrayList
* if no answers are retrieved.
*/
public ArrayList askWithLiteral(List queryLit) {
ArrayList ans = new ArrayList();
if ((queryLit instanceof List) && !(queryLit.isEmpty())) {
String pred = (String) queryLit.get(0);
if (pred.equals("instance")
&& isVariable(queryLit.get(1))
&& !(isVariable(queryLit.get(2)))) {
String className = queryLit.get(2);
String inst = null;
String fStr = null;
Formula f = null;
Set ai = getAllInstances(className);
Iterator it = ai.iterator();
while (it.hasNext()) {
inst = (String) it.next();
fStr = ("(instance " + inst + " " + className + ")");
f = new Formula();
f.read(fStr);
ans.add(f);
}
}
else if (pred.equals("valence")
&& isVariable((String)queryLit.get(1))
&& isVariable((String)queryLit.get(2))) {
TreeSet ai = getAllInstances("Relation");
Iterator it = ai.iterator();
int valence = 0;
while (it.hasNext()) {
String inst = (String) it.next();
valence = kbCache.valences.get(inst);
if (valence > 0) {
String fStr = ("(valence " + inst + " " + valence + ")");
Formula f = new Formula();
f.read(fStr);
ans.add(f);
}
}
}
else {
String constant = null;
int cidx = -1;
int qlLen = queryLit.size();
String term = null;
for (int i = 1 ; i < qlLen ; i++) {
term = (String) queryLit.get(i);
if (StringUtil.isNonEmptyString(term) && !isVariable(term)) {
constant = term;
cidx = i;
break;
}
}
if (constant != null)
ans = askWithRestriction(cidx, constant, 0, pred);
else
ans = ask("arg", 0, pred);
}
}
return ans;
}
/** ***************************************************************
* This method retrieves formulas by asking the query expression
* queryLit, and returns the results, if any, in an ArrayList.
*
* @param queryLit The query, which is assumed to be an atomic
* literal consisting of a single predicate and its arguments.
* The arguments could be variables, constants, or a mix of the
* two, but only the first constant encountered in a left to right
* sweep over the literal will be used in the actual query.
*
* @return An ArrayList of Formula objects, or an empty ArrayList
* if no answers are retrieved.
*/
public ArrayList askWithLiteral(Formula queryLit) {
List input = queryLit.literalToArrayList();
return askWithLiteral(input);
}
/** ***************************************************************
* This method retrieves the upward transitive closure of all Class
* names contained in the input set. The members of the input set are
* not included in the result set.
*
* @param classNames A Set object containing SUO-KIF class names
* (Strings).
*
* @return A Set of SUO-KIF class names, which could be empty.
*/
public Set getAllSuperClasses(Set classNames) {
Set ans = new HashSet();
Iterator it = classNames.iterator();
while (it.hasNext()) {
String term = it.next();
ans.addAll(kbCache.getParentClasses(term));
}
return ans;
}
/** ***************************************************************
* This method retrieves all instances of the classes named in the
* input set.
*
* @param classNames A Set of String, containing SUO-KIF class names
* @return A TreeSet, possibly empty, containing SUO-KIF constant names.
*/
protected TreeSet getAllInstances(TreeSet classNames) {
TreeSet ans = new TreeSet();
if ((classNames instanceof TreeSet) && !classNames.isEmpty()) {
String name = null;
Iterator it = classNames.iterator();
while (it.hasNext()) {
name = it.next();
ans.addAll(kbCache.getParentClassesOfInstance(name));
}
}
return ans;
}
/** ***************************************************************
* This method retrieves all instances of the class named in the
* input String.
*
* @param className The name of a SUO-KIF Class.
* @return A TreeSet, possibly empty, containing SUO-KIF constant names.
*/
public TreeSet getAllInstances(String className) {
if (StringUtil.isNonEmptyString(className)) {
TreeSet input = new TreeSet();
input.add(className);
return getAllInstances(input);
}
return new TreeSet();
}
/** ***************************************************************
* This method tries to find or compute a valence for the input
* relation.
*
* @param relnName A String, the name of a SUO-KIF Relation.
* @return An int value. -1 means that no valence value could be
* found. 0 means that the relation is a VariableArityRelation.
* 1-5 are the standard SUO-KIF valence values.
*/
public int getValence(String relnName) {
if (kbCache.valences.get(relnName) == null) {
if (Formula.isLogicalOperator(relnName)) // logical operator arity is checked in KIF.parse()
return -1;
System.out.println("Error in KB.getValence(): No valence found for " + relnName);
return -1;
}
else
return kbCache.valences.get(relnName);
}
/** ***************************************************************
* @return an ArrayList containing all predicates in this KB.
*/
public ArrayList collectPredicates() {
return new ArrayList(kbCache.instances.get("Predicate"));
}
/** ***************************************************************
* @param obj Any object
*
* @return true if obj is a String representation of a LISP empty
* list, else false.
*/
public static boolean isEmptyList(Object obj) {
return (StringUtil.isNonEmptyString(obj) && Formula.empty((String) obj));
}
/** ***************************************************************
* A static utility method.
*
* @param obj Presumably, a String.
* @return true if obj is a SUO-KIF variable, else false.
*/
public static boolean isVariable(String obj) {
if (StringUtil.isNonEmptyString(obj)) {
return (obj.startsWith("?") || obj.startsWith("@"));
}
return false;
}
/** ***************************************************************
* A static utility method.
*
* @param obj A String.
* @return true if obj is a SUO-KIF logical quantifier, else
* false.
*/
public static boolean isQuantifier(String obj) {
return (StringUtil.isNonEmptyString(obj)
&& (obj.equals("forall") || obj.equals("exists")));
}
/** ***************************************************************
* A static utility method.
*
* @param obj Presumably, a String.
* @return true if obj is a SUO-KIF commutative logical operator,
* else false.
*/
public static boolean isCommutative(String obj) {
return (StringUtil.isNonEmptyString(obj)
&& (obj.equals("and") || obj.equals("or")));
}
/** *************************************************************
* Hyperlink terms identified with '&%' to the URL that brings up
* that term in the browser. Handle (and ignore) suffixes on the
* term. For example "&%Processes" would get properly linked to
* the term "Process", if present in the knowledge base.
*/
public String formatDocumentation(String href, String documentation, String language) {
String formatted = documentation;
if (StringUtil.isNonEmptyString(formatted)) {
boolean isStaticFile = false;
StringBuilder sb = new StringBuilder(formatted);
String suffix = "";
if (StringUtil.emptyString(href)) {
href = "";
suffix = ".html";
isStaticFile = true;
}
else if (!href.endsWith("&term="))
href += "&term=";
int i = -1;
int j = -1;
int start = 0;
String term = "";
String formToPrint = "";
while ((start < sb.length()) && ((i = sb.indexOf("&%", start)) != -1)) {
sb.delete(i, (i + 2));
j = i;
while ((j < sb.length())
&& !Character.isWhitespace(sb.charAt(j))
&& sb.charAt(j) != '"')
j++;
while (j > i) {
term = sb.substring(i,j);
if (containsTerm(term))
break;
j--;
}
if (j > i) {
//formToPrint = DocGen.getInstance(this.name).showTermName(this,term,language);
formToPrint = term;
StringBuilder hsb = new StringBuilder("