/*
* Copyright 2008 Fedora Commons, Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.mulgara.krule.rlog.ast;
/**
* Visitor pattern class used to help convert a tree from a CST to an AST.
*
* @created May 16, 2008
* @author Paula Gearon
* @copyright © 2008 <a href="http://www.fedora-commons.org/">Fedora Commons</a>
*/
public class TreeTransformer implements TreeWalker {
// Axiom BPredicateLiteral Rule TypeLiteral Variable StringLiteral IntegerLiteral
public void visit(Axiom node) {
System.out.println("Local treewalker: Axiom");
node.predicate.accept(this);
}
public void visit(Rule node) {
System.out.println("Local treewalker: Rule");
node.head.accept(this);
for (Predicate p: node.body) p.accept(this);
}
public void visit(TypeStatement node) {
System.out.println("Local treewalker: TypeStatement");
node.typeLabel.accept(this);
node.param.accept(this);
}
public void visit(InvertedPredicate node) {
System.out.println("Local treewalker: InvertedType");
node.invertPredicate.accept(this);
}
public void visit(BPredicate node) {
System.out.println("Local treewalker: BPredicate");
node.label.accept(this);
node.left.accept(this);
node.right.accept(this);
}
public void visit(BPredicateLiteral node) {
// leaf
}
public void visit(TypeLiteral node) {
// leaf
}
public void visit(Variable node) {
// leaf
}
public void visit(StringLiteral node) {
// leaf
}
public void visit(IntegerLiteral node) {
// leaf
}
}