| /* |
| * Copyright 2008 Google 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 com.google.gwt.dev.jjs.ast; |
| |
| import com.google.gwt.dev.jjs.HasSourceInfo; |
| import com.google.gwt.dev.jjs.SourceInfo; |
| import com.google.gwt.dev.jjs.impl.SourceGenerationVisitor; |
| import com.google.gwt.dev.jjs.impl.ToStringGenerationVisitor; |
| import com.google.gwt.dev.util.DefaultTextOutput; |
| |
| import java.io.Serializable; |
| |
| /** |
| * Base class for all visitable AST nodes. |
| */ |
| public abstract class JNode implements HasSourceInfo, Serializable { |
| |
| private SourceInfo info; |
| |
| protected JNode(SourceInfo info) { |
| assert info != null : "SourceInfo must be provided for JNodes"; |
| this.info = info; |
| } |
| |
| @Override |
| public SourceInfo getSourceInfo() { |
| return info; |
| } |
| |
| public void setSourceInfo(SourceInfo info) { |
| assert this.info.getOrigin() == info.getOrigin(); |
| this.info = info; |
| } |
| |
| /** |
| * Causes this object to have the visitor visit itself and its children. |
| * |
| * @param visitor the visitor that should traverse this node |
| * @param ctx the context of an existing traversal |
| */ |
| public abstract void traverse(JVisitor visitor, Context ctx); |
| |
| // Causes source generation to delegate to the one visitor |
| // toSource should be customized in ToStringGenerationVisitor, do not remove final. |
| public final String toSource() { |
| DefaultTextOutput out = new DefaultTextOutput(false); |
| SourceGenerationVisitor v = new SourceGenerationVisitor(out); |
| v.accept(this); |
| return out.toString(); |
| } |
| |
| // Causes source generation to delegate to the one visitor. |
| // toString should be customized in ToStringGenerationVisitor, do not remove final. |
| @Override |
| public final String toString() { |
| DefaultTextOutput out = new DefaultTextOutput(false); |
| ToStringGenerationVisitor v = new ToStringGenerationVisitor(out); |
| v.accept(this); |
| return out.toString(); |
| } |
| } |