On Saturday 16 February 2002 17:39, Stephan Michels wrote: >. . . > Chaperon is a LALR(1) parser, which parse structured text documents > and generate XML documents as output. >. . .
If anyone wants to play with Chaperon, here's a small command-line driver that I wrote for this parser, allows Chaperon to run in a minimal environment. Tested a few minutes ago by compiling it with the current CVS of chaperon (http://sourceforge.net/projects/chaperon). Stephan, feel free to include this code in your project if you like it! -Bertrand -------- CODE STARTS HERE ------------------------ /* * Simple command-line driver for the chaperon parser. * See http://www.sourceforge.net/projects/chaperon * Copyright (C) Bertrand Delacretaz, www.codeconsult.ch. * All rights reserved. * ------------------------------------------------------------------- * This software is published under the terms of the Apache Software * License version 1.1, a copy of which has been included with this * distribution in the LICENSE file. */ package net.sourceforge.chaperon.cmdline; import java.io.OutputStream; import java.io.File; import java.io.FileOutputStream; import java.io.FileInputStream; import java.io.OutputStreamWriter; import org.apache.xml.serialize.Method; import org.apache.xml.serialize.OutputFormat; import org.apache.xml.serialize.XMLSerializer; import org.apache.xerces.parsers.SAXParser; import org.xml.sax.SAXParseException; import org.xml.sax.InputSource; import net.sourceforge.chaperon.grammar.Grammar; import net.sourceforge.chaperon.grammar.SyntaxErrorException; import net.sourceforge.chaperon.grammar.generator.SAXGrammarGenerator; import net.sourceforge.chaperon.parser.generator.ParserTableGenerator; import net.sourceforge.chaperon.parser.ParserTable; import net.sourceforge.chaperon.parser.Parser; import net.sourceforge.chaperon.parser.CompressedDocument; /** * Simple command-line driver for the chaperon parser * * @author Bertrand Delacretaz [EMAIL PROTECTED] * @version $Revision$ */ public class CmdLineParser { /** Parse grammarFile and use its grammar to parse inputFile. * Write the result to os. * Does not store the compiled grammar, recompiles it every time. */ CmdLineParser(File grammarFile, File inputFile, OutputStream os) throws Exception { final ParserTable pt = parseGrammar(grammarFile); final CompressedDocument cd = parseInput(pt,inputFile,os); dumpDocument(cd,os); } /** parse supplied grammarFile */ private ParserTable parseGrammar(File grammarFile) throws Exception { final SAXParser parser = new SAXParser(); final SAXGrammarGenerator gg = new SAXGrammarGenerator(); parser.setContentHandler(gg); info("parsing grammar file " + grammarFile.getName() + "..."); parser.parse(grammarFile.getAbsolutePath()); info("building parser table..."); final Grammar g = gg.getGrammar(); if(g == null) { throw new Exception("no Grammar was generated while parsing grammar file"); } final ParserTableGenerator ptg = new ParserTableGenerator(g); return ptg.getParserTable(); } /** parse supplied inputFile using supplied ParserTable (compiled grammar) */ private CompressedDocument parseInput(ParserTable pt,File inputFile,OutputStream os) throws Exception { info("parsing input file " + inputFile.getName() + "..."); final Parser p = new Parser(); final InputSource is = new InputSource(new FileInputStream(inputFile)); return p.parse(pt,is); } /** dump supplied CompressedDocument to supplied OutputStream */ private void dumpDocument(CompressedDocument cd,OutputStream os) throws Exception { info("dumping parsed XML document..."); final String encoding = "iso-8859-1"; final OutputFormat format = new OutputFormat(Method.XML,encoding,true); format.setIndenting(true); format.setIndent(1); final OutputStreamWriter osw = new OutputStreamWriter(os); final XMLSerializer xmls = new XMLSerializer(osw,format); cd.toSAX(xmls.asContentHandler(), null); os.flush(); } /** trivial logging mechanism */ protected static void warn(String msg) { System.err.println("Chaperon CmdLineParser WARNING : " + msg); } /** trivial info mechanism */ protected static void info(String msg) { System.err.println("Chaperon CmdLineParser: " + msg); } /** Entry point to parser from the command-line. * Compiles the given grammar file and runs the parser on given input file. * Output goes to stdout unless an output filename is specified */ public static void main(String args[]) throws Exception { if(args.length < 2) { warn("usage: CmdLineParser <grammarFile> <inputFile> [outputFile]"); System.exit(1); } final String grammarFile = args[0]; final String inputFile = args[1]; final String outputFile = args.length > 2 ? args[2] : null; info("using grammar file: " + grammarFile); info("using input file: " + grammarFile); info("using output file: " + (outputFile == null ? "stdout" : outputFile)); OutputStream os = System.out; if(outputFile != null) { os = new FileOutputStream(outputFile); } new CmdLineParser(new File(grammarFile),new File(inputFile),os); info("all done."); } } --- CODE ENDS HERE - no kidding, you read it entirely? ---------------- --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, email: [EMAIL PROTECTED]
