/* Copyright 2008, 2009, 2010 by the Oxford University Computing Laboratory
This file is part of HermiT.
HermiT is free software: you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
HermiT 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 Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License
along with HermiT. If not, see <http://www.gnu.org/licenses/>.
*/
package org.semanticweb.HermiT.datatypes.bool;
import java.util.Collection;
import java.util.Collections;
import java.util.Set;
import org.semanticweb.HermiT.Prefixes;
import org.semanticweb.HermiT.datatypes.DatatypeHandler;
import org.semanticweb.HermiT.datatypes.MalformedLiteralException;
import org.semanticweb.HermiT.datatypes.UnsupportedFacetException;
import org.semanticweb.HermiT.datatypes.ValueSpaceSubset;
import org.semanticweb.HermiT.model.DatatypeRestriction;
public class BooleanDatatypeHandler implements DatatypeHandler {
protected static final String XSD_BOOLEAN=Prefixes.s_semanticWebPrefixes.get("xsd")+"boolean";
protected static final ValueSpaceSubset BOOLEAN_ALL=new BooleanAll();
protected static final ValueSpaceSubset EMPTY=new BooleanNone();
protected final static Set<String> s_managedDatatypeURIs=Collections.singleton(XSD_BOOLEAN);
public Set<String> getManagedDatatypeURIs() {
return s_managedDatatypeURIs;
}
public Object parseLiteral(String lexicalForm,String datatypeURI) throws MalformedLiteralException {
assert XSD_BOOLEAN.equals(datatypeURI);
lexicalForm=lexicalForm.trim();
if ("false".equalsIgnoreCase(lexicalForm) || "0".equals(lexicalForm))
return Boolean.FALSE;
else if ("true".equalsIgnoreCase(lexicalForm) || "1".equals(lexicalForm))
return Boolean.TRUE;
else
throw new MalformedLiteralException(lexicalForm,datatypeURI);
}
public void validateDatatypeRestriction(DatatypeRestriction datatypeRestriction) throws UnsupportedFacetException {
assert XSD_BOOLEAN.equals(datatypeRestriction.getDatatypeURI());
if (datatypeRestriction.getNumberOfFacetRestrictions()>0)
throw new UnsupportedFacetException("xsd:boolean does not provide any facets.");
}
public ValueSpaceSubset createValueSpaceSubset(DatatypeRestriction datatypeRestriction) {
assert XSD_BOOLEAN.equals(datatypeRestriction.getDatatypeURI());
assert datatypeRestriction.getNumberOfFacetRestrictions()==0;
return BOOLEAN_ALL;
}
public ValueSpaceSubset conjoinWithDR(ValueSpaceSubset valueSpaceSubset,DatatypeRestriction datatypeRestriction) {
assert XSD_BOOLEAN.equals(datatypeRestriction.getDatatypeURI());
assert datatypeRestriction.getNumberOfFacetRestrictions()==0;
return BOOLEAN_ALL;
}
public ValueSpaceSubset conjoinWithDRNegation(ValueSpaceSubset valueSpaceSubset,DatatypeRestriction datatypeRestriction) {
assert XSD_BOOLEAN.equals(datatypeRestriction.getDatatypeURI());
assert datatypeRestriction.getNumberOfFacetRestrictions()==0;
return EMPTY;
}
public boolean isSubsetOf(String subsetDatatypeURI,String supersetDatatypeURI) {
assert XSD_BOOLEAN.equals(subsetDatatypeURI);
assert XSD_BOOLEAN.equals(supersetDatatypeURI);
return true;
}
public boolean isDisjointWith(String datatypeURI1,String datatypeURI2) {
assert XSD_BOOLEAN.equals(datatypeURI1);
assert XSD_BOOLEAN.equals(datatypeURI2);
return false;
}
protected static class BooleanAll implements ValueSpaceSubset {
public boolean hasCardinalityAtLeast(int number) {
return number<=2;
}
public boolean containsDataValue(Object dataValue) {
return Boolean.FALSE.equals(dataValue) || Boolean.TRUE.equals(dataValue);
}
public void enumerateDataValues(Collection<Object> dataValues) {
dataValues.add(Boolean.FALSE);
dataValues.add(Boolean.TRUE);
}
}
protected static class BooleanNone implements ValueSpaceSubset {
public boolean hasCardinalityAtLeast(int number) {
return number<=0;
}
public boolean containsDataValue(Object dataValue) {
return false;
}
public void enumerateDataValues(Collection<Object> dataValues) {
}
}
}