/**
* Copyright (c) 2013, Institute of Information Systems (Sven Groppe and contributors of LUPOSDATE), University of Luebeck
*
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification, are permitted provided that the
* following conditions are met:
*
* - Redistributions of source code must retain the above copyright notice, this list of conditions and the following
* disclaimer.
* - Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the
* following disclaimer in the documentation and/or other materials provided with the distribution.
* - Neither the name of the University of Luebeck nor the names of its contributors may be used to endorse or promote
* products derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
* GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
package lupos.rif.visitor;
import java.util.ArrayList;
import java.util.List;
import lupos.datastructures.bindings.Bindings;
import lupos.rif.IExpression;
import lupos.rif.IRuleNode;
import lupos.rif.IRuleVisitor;
import lupos.rif.RIFException;
import lupos.rif.model.Conjunction;
import lupos.rif.model.Constant;
import lupos.rif.model.Disjunction;
import lupos.rif.model.Document;
import lupos.rif.model.Equality;
import lupos.rif.model.ExistExpression;
import lupos.rif.model.External;
import lupos.rif.model.Rule;
import lupos.rif.model.RuleList;
import lupos.rif.model.RulePredicate;
import lupos.rif.model.RuleVariable;
public class ReplaceVarsVisitor implements IRuleVisitor<IRuleNode, IRuleNode> {
public Bindings bindings;
public IRuleNode visit(Document obj, IRuleNode arg) throws RIFException {
throw new UnsupportedOperationException();
}
public IRuleNode visit(Rule obj, IRuleNode arg) throws RIFException {
throw new UnsupportedOperationException();
}
public IRuleNode visit(ExistExpression obj, IRuleNode arg)
throws RIFException {
throw new UnsupportedOperationException();
}
public IRuleNode visit(Conjunction obj, IRuleNode arg) throws RIFException {
final Conjunction result = new Conjunction();
result.setParent(arg);
List<IExpression> exprs = new ArrayList<IExpression>(obj.exprs);
for (IExpression expr : exprs)
result.exprs.add((IExpression) expr.accept(this, result));
return result;
}
public IRuleNode visit(Disjunction obj, IRuleNode arg) throws RIFException {
final Disjunction result = new Disjunction();
result.setParent(arg);
List<IExpression> exprs = new ArrayList<IExpression>(obj.exprs);
for (IExpression expr : exprs)
result.exprs.add((IExpression) expr.accept(this, result));
return result;
}
public IRuleNode visit(RulePredicate obj, IRuleNode arg) throws RIFException {
final RulePredicate result = new RulePredicate(obj.isTriple());
result.setParent(arg);
result.termName = (IExpression) obj.termName.accept(this, result);
List<IExpression> exprs = new ArrayList<IExpression>(obj.termParams);
for (IExpression expr : exprs)
result.termParams.add((IExpression) expr.accept(this, result));
return result;
}
public IRuleNode visit(Equality obj, IRuleNode arg) throws RIFException {
final Equality result = new Equality();
result.leftExpr = (IExpression) obj.leftExpr.accept(this, result);
result.rightExpr = (IExpression) obj.rightExpr.accept(this, result);
return result;
}
public IRuleNode visit(External obj, IRuleNode arg) throws RIFException {
final External result = new External();
result.setParent(arg);
result.termName = (IExpression) obj.termName.accept(this, result);
List<IExpression> exprs = new ArrayList<IExpression>(obj.termParams);
for (IExpression expr : exprs)
result.termParams.add((IExpression) expr.accept(this, result));
return result;
}
public IRuleNode visit(RuleList obj, IRuleNode arg) throws RIFException {
final RuleList result = new RuleList();
result.setParent(arg);
result.isOpen = obj.isOpen;
List<IExpression> exprs = new ArrayList<IExpression>(obj.getItems());
for (IExpression expr : exprs)
result.getItems().add((IExpression) expr.accept(this, result));
return result;
}
public IRuleNode visit(RuleVariable obj, IRuleNode arg) throws RIFException {
return new Constant(bindings.get(obj.getVariable()), arg);
}
public IRuleNode visit(Constant obj, IRuleNode arg) throws RIFException {
return new Constant(obj.getLiteral(), arg);
}
}