Using Rhino Javascript parsing, how to get comments?

Question

I have several javascript files and parse it with a Rhino JavaScript parser.

but I can not get the comments.

How can I get comments?

here is part of my code.

run this code, the variable "comment" is null. also when running "astRoot.toSource ();", it only shows javascript code. No comments. he dissapeared!

[java code]

public void parser() { AstRoot astRoot = new Parser().parse(this.jsString, this.uri, 1); List<AstNode> statList = astRoot.getStatements(); for(Iterator<AstNode> iter = statList.iterator(); iter.hasNext();) { FunctionNode fNode = (FunctionNode)iter.next(); System.out.println("*** function Name : " + fNode.getName() + ", paramCount : " + fNode.getParamCount() + ", depth : " + fNode.depth()); AstNode bNode = fNode.getBody(); Block block = (Block)bNode; visitBody(block); } System.out.println(astRoot.toSource()); SortedSet<Comment> comment = astRoot.getComments(); if(comment == null) System.out.println("comment is null"); } 

Answer 1

Configure CompilerEnvirons and use AstRoot.visitAll (NodeVisitor) :

 import java.io.*; import org.mozilla.javascript.CompilerEnvirons; import org.mozilla.javascript.Parser; import org.mozilla.javascript.ast.*; public class PrintNodes { public static void main(String[] args) throws IOException { class Printer implements NodeVisitor { @Override public boolean visit(AstNode node) { String indent = "%1$Xs".replace("X", String.valueOf(node.depth() + 1)); System.out.format(indent, "").println(node.getClass()); return true; } } String file = "foo.js"; Reader reader = new FileReader(file); try { CompilerEnvirons env = new CompilerEnvirons(); env.setRecordingLocalJsDocComments(true); env.setAllowSharpComments(true); env.setRecordingComments(true); AstRoot node = new Parser(env).parse(reader, file, 1); node.visitAll(new Printer()); } finally { reader.close(); } } } 

Java 6 Rhino 1.7r4