| /******************************************************************************* |
| * Copyright (c) 2006 Oracle Corporation and others. |
| * All rights reserved. This program and the accompanying materials |
| * are made available under the terms of the Eclipse Public License v1.0 |
| * which accompanies this distribution, and is available at |
| * http://www.eclipse.org/legal/epl-v10.html |
| * |
| * Contributors: |
| * Oracle Corporation - initial API and implementation |
| *******************************************************************************/ |
| |
| package org.eclipse.bpel.xpath10 ; |
| |
| /** |
| * Java JDK dependencies ... |
| */ |
| import java.util.List; |
| |
| |
| /** |
| * |
| * @author Michal Chmielewski (michal.chmielewski@oracle.com) |
| * @date Aug 26, 2008 |
| */ |
| |
| public class Visitor { |
| |
| protected void visit ( PathExpr expr ) { |
| visit ( expr.getFilterExpr() ); |
| visit ( expr.getLocationPath() ); |
| } |
| |
| |
| protected void visit (LocationPath expr ) { |
| visitList( expr.getSteps() ); |
| } |
| |
| |
| |
| protected void visit (FilterExpr expr) { |
| visit(expr.getExpr()); |
| visitList( expr.getPredicates() ); |
| } |
| |
| protected void visit (BinaryExpr expr) { |
| |
| visit(expr.getLHS()); |
| visit(expr.getRHS()); |
| } |
| |
| |
| protected void visit(UnaryExpr expr) { |
| visit( expr.getExpr() ); |
| } |
| |
| |
| protected void visit(UnionExpr expr) { |
| visit(expr.getLHS()); |
| visit(expr.getRHS()); |
| |
| } |
| |
| protected void visit (NumberExpr expr) { |
| |
| } |
| |
| |
| protected void visit (LiteralExpr expr) { |
| |
| } |
| |
| |
| protected void visit (VariableReferenceExpr expr) { |
| |
| } |
| |
| |
| protected void visit (FunctionCallExpr expr) { |
| visitList( expr.getParameters() ); |
| } |
| |
| protected void visit (NameStep step) { |
| visitList(step.getPredicates()); |
| } |
| |
| protected void visit(ProcessingInstructionNodeStep step) { |
| visitList(step.getPredicates()); |
| } |
| |
| protected void visit(AllNodeStep step) { |
| visitList(step.getPredicates()); |
| } |
| |
| |
| protected void visit (TextNodeStep step) { |
| visitList(step.getPredicates()); |
| } |
| |
| protected void visit (CommentNodeStep step) { |
| visitList(step.getPredicates()); |
| } |
| |
| protected void visit (Predicate predicate) { |
| visit(predicate.getExpr()); |
| } |
| |
| |
| void visitList ( List<?> list) { |
| for(Object next: list) { |
| visit(next); |
| } |
| } |
| |
| |
| /** |
| * @param obj |
| */ |
| public void visit ( Object obj ) { |
| |
| if (obj instanceof PathExpr) { |
| visit((PathExpr) obj); |
| } else if (obj instanceof LocationPath) { |
| visit((LocationPath) obj); |
| } else if (obj instanceof BinaryExpr) { |
| visit((BinaryExpr) obj); |
| } else if (obj instanceof FilterExpr) { |
| visit((FilterExpr)obj); |
| } else if (obj instanceof UnaryExpr) { |
| visit((UnaryExpr)obj); |
| } else if (obj instanceof NumberExpr) { |
| visit((NumberExpr)obj); |
| } else if (obj instanceof LiteralExpr) { |
| visit((LiteralExpr)obj); |
| } else if (obj instanceof VariableReferenceExpr) { |
| visit((VariableReferenceExpr)obj); |
| } else if (obj instanceof FunctionCallExpr) { |
| visit((FunctionCallExpr) obj); |
| } else if (obj instanceof List) { |
| visitList((List<?>) obj); |
| } else if (obj instanceof NameStep) { |
| visit((NameStep)obj); |
| } else if (obj instanceof ProcessingInstructionNodeStep) { |
| visit((ProcessingInstructionNodeStep) obj); |
| } else if (obj instanceof AllNodeStep) { |
| visit((AllNodeStep)obj); |
| } else if (obj instanceof TextNodeStep) { |
| visit((TextNodeStep)obj); |
| } else if (obj instanceof CommentNodeStep) { |
| visit((CommentNodeStep)obj); |
| } else if (obj instanceof Predicate) { |
| visit((Predicate)obj); |
| } else { |
| // ignore or throw error ... ? |
| } |
| } |
| |
| } |