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package uk.ac.ox.cs.pagoda.hermit;
import org.semanticweb.HermiT.model.*;
import uk.ac.ox.cs.pagoda.MyPrefixes;
import uk.ac.ox.cs.pagoda.owl.OWLHelper;
import uk.ac.ox.cs.pagoda.util.Namespace;
import java.security.InvalidParameterException;
import java.util.ArrayList;
public class RuleHelper {
private static final String OR = "|";
private static final String IF = ":-";
private static final String AND = ",";
// public static String abbreviateIRI(String text) {
// String prefixName, prefixIRI;
// int start = -1, ends = -1;
// while (true) {
// start = text.indexOf('<', ends + 1);
// if (start == -1) return text;
// ends = text.indexOf('>', start + 1);
// if (ends == -1) return text;
// String sub = text.substring(start, ends + 1), newSub = text.substring(start + 1, ends);
//
// int index = splitPoint(newSub);
// if (index >= 0) {
// prefixIRI = newSub.substring(0, index + 1);
// if ((prefixName = MyPrefixes.PAGOdAPrefixes.getPrefixName(prefixIRI)) == null) {
// prefixName = getNewPrefixName();
// MyPrefixes.PAGOdAPrefixes.declarePrefix(prefixName, prefixIRI);
// }
// newSub = newSub.replace(prefixIRI, prefixName);
// text = text.replaceAll(sub, newSub);
// ends -= sub.length() - newSub.length();
// }
// }
// }
public static String getText(DLClause clause) {
StringBuffer buf = new StringBuffer();
String atomText;
boolean lastSpace = true;
for (Atom headAtom: clause.getHeadAtoms()) {
if ((atomText = getText(headAtom)) == null) continue;
if (!lastSpace) buf.append(" ").append(OR).append(" ");
buf.append(atomText);
lastSpace = false;
}
buf.append(" ").append(IF).append(" ");
lastSpace = true;
for (Atom bodyAtom: clause.getBodyAtoms()) {
// for (String str: strs[1].split(", ")) {
if ((atomText = getText(bodyAtom)) == null) continue;
if (!lastSpace) buf.append(AND).append(" ");
buf.append(atomText);
lastSpace = false;
}
buf.append('.');
return buf.toString();
}
private static String getText(Atom atom) {
if (atom.getDLPredicate() instanceof NodeIDsAscendingOrEqual ||
atom.getDLPredicate() instanceof NodeIDLessEqualThan)
return null;
StringBuilder builder = new StringBuilder();
if (atom.getArity() == 1) {
builder.append(getText(atom.getDLPredicate()));
builder.append("(");
builder.append(getText(atom.getArgument(0)));
builder.append(")");
}
else {
DLPredicate p = atom.getDLPredicate();
if (p instanceof Equality || p instanceof AnnotatedEquality) builder.append(Namespace.EQUALITY_ABBR);
else if (p instanceof Inequality) builder.append(Namespace.INEQUALITY_ABBR);
else builder.append(getText(p));
builder.append("(");
builder.append(getText(atom.getArgument(0)));
builder.append(",");
builder.append(getText(atom.getArgument(1)));
builder.append(")");
}
return builder.toString();
}
public static String getText(DLPredicate p) {
if (p instanceof Equality || p instanceof AnnotatedEquality) return Namespace.EQUALITY_ABBR;
if (p instanceof Inequality) return Namespace.INEQUALITY_ABBR;
if (p instanceof AtomicRole && ((AtomicRole) p).getIRI().startsWith("?"))
return ((AtomicRole) p).getIRI();
return MyPrefixes.PAGOdAPrefixes.abbreviateIRI(p.toString());
}
public static String getText(Term t) {
if (t instanceof Variable)
return "?" + ((Variable) t).getName();
return MyPrefixes.PAGOdAPrefixes.abbreviateIRI(t.toString());
}
public static Term parseTerm(String s) {
s = s.trim();
if(s.startsWith("?")) return Variable.create(s.substring(1));
return Individual.create(MyPrefixes.PAGOdAPrefixes.expandIRI(s));
}
public static Atom parseAtom(String s) {
s = s.trim();
String[] split = s.split("\\(");
String predicateIri = OWLHelper.removeAngles(MyPrefixes.PAGOdAPrefixes.expandText(split[0]));
String[] predicateArgs = split[1].substring(0, split[1].length() - 1).split(",");
int numOfargs = predicateArgs.length;
Term terms[] = new Term[predicateArgs.length];
for (int i = 0; i < terms.length; i++)
terms[i] = parseTerm(predicateArgs[i]);
if(numOfargs == 1) {
AtomicConcept atomicConcept = AtomicConcept.create(predicateIri);
return Atom.create(atomicConcept, terms);
}
else if(numOfargs == 2) {
AtomicRole atomicRole = AtomicRole.create(predicateIri);
return Atom.create(atomicRole, terms);
}
else
throw new InvalidParameterException();
// TODO? add equality (owl:sameAs)?
}
public static DLClause parseClause(String s) {
s = s.trim();
if(s.endsWith(".")) s = s.substring(0, s.length()-1).trim();
String[] headAndBody = s.split(IF);
String[] headAtomsStr = splitAtoms(headAndBody[0], OR);
String[] bodyAtomsStr = splitAtoms(headAndBody[1], AND);
Atom[] headAtoms = new Atom[headAtomsStr.length];
Atom[] bodyAtoms = new Atom[bodyAtomsStr.length];
for (int i = 0; i < headAtoms.length; i++)
headAtoms[i] = parseAtom(headAtomsStr[i]);
for (int i = 0; i < bodyAtoms.length; i++)
bodyAtoms[i] = parseAtom(bodyAtomsStr[i]);
return DLClause.create(headAtoms, bodyAtoms);
}
private static String[] splitAtoms(String s, String operator) {
char op = operator.charAt(0);
ArrayList<String> result = new ArrayList<>();
int b = 0;
boolean betweenParenthesis = false;
for (int i = 0; i < s.length(); i++) {
if(s.charAt(i) == '(')
betweenParenthesis = true;
else if(s.charAt(i) == ')')
betweenParenthesis = false;
else if(s.charAt(i) == op && !betweenParenthesis) {
result.add(s.substring(b, i));
b = i + 1;
}
}
if(b < s.length()) result.add(s.substring(b));
return result.toArray(new String[0]);
}
}
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