java를 이용한 antlr AST 탐색하기(AST navigation)

학교에 있을때도 잘 안다루던 java라서 import 하나하나 해주고
exception 처리해주는게 익숙하지가 않아서 힘들다 ㅠ.ㅠ

import java.io.*; import org.antlr.runtime.*; import org.antlr.runtime.tree.*; import org.antlr.stringtemplate.*; public class antlrtest{ /**  * @param args  */ public static void printTree(CommonTree t, int indent) { if (t != null) { StringBuffer sb = new StringBuffer(indent); for (int i = 0; i < indent; i++) sb = sb.append("   "); for (int i = 0; i < t.getChildCount(); i++) { if(t.getChild(i).toString().matches(".*Manager")) { System.out.println(sb.toString() + t.getChild(i).toString()); printTree((CommonTree) t.getChild(i), indent + 1); } } } } public static void main(String[] args) { // TODO Auto-generated method stub try { JavaLexer theLexer = new JavaLexer(new ANTLRFileStream(args[0])); CommonTokenStream theTokenStream = new CommonTokenStream(theLexer); JavaParser Parser = new JavaParser(theTokenStream); CommonTree tree = (CommonTree) Parser.compilationUnit().getTree(); printTree(tree,1); DOTTreeGenerator gen = new DOTTreeGenerator(); StringTemplate st = gen.toDOT(tree); // System.out.println(st); } catch (IOException | RecognitionException inException) { inException.printStackTrace(); } } }

[링크 : http://www.antlr.org/wiki/display/ANTLR3/Tree+construction]
[링크 : http://www.antlr.org/wiki/display/ANTLR3/Interfacing+AST+with+Java]
[링크 : http://antlr.1301665.n2.nabble.com/Inconsistent-Parse-Results-td3018499.html]
[링크 : http://stackoverflow.com/questions/4931346/how-to-output-the-ast-built-using-antlr]