Add lua2java too to compile from lua source to java source
This commit is contained in:
James Roseborough
197
src/jse/lua2java.java
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197
src/jse/lua2java.java
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/*******************************************************************************
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* Copyright (c) 2010 Luaj.org. All rights reserved.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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******************************************************************************/
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import java.io.File;
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import java.io.FileInputStream;
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import java.io.FileOutputStream;
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import java.io.IOException;
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import java.io.PrintWriter;
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import java.util.ArrayList;
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import java.util.List;
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import org.luaj.vm2.Lua;
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import org.luaj.vm2.ast.Chunk;
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import org.luaj.vm2.lua2java.JavaCodeGen;
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import org.luaj.vm2.parser.LuaParser;
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/**
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* Compile lua sources into java sources.
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*/
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public class lua2java {
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private static final String version = Lua._VERSION + "Copyright (C) 2010 luaj.org";
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private static final String usage =
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"usage: java -cp luaj-jse.jar lua2java [options] [filenames].\n" +
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"Available options are:\n" +
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" - process stdin\n" +
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" -s src source directory\n" +
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" -d dir destination directory\n" +
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" -p pkg package prefix to apply to all classes\n" +
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" -r recursively compile all\n" +
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" -v verbose\n";
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private static void usageExit() {
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System.out.println(usage);
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System.exit(-1);
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}
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private String srcdir = null;
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private String destdir = null;
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private String pkgprefix = null;
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private boolean recurse = false;
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private boolean verbose = false;
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private List<InputFile> files = new ArrayList<InputFile>();
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public static void main( String[] args ) throws IOException {
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new lua2java( args );
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}
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private lua2java( String[] args ) throws IOException {
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// process args
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try {
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List<String> seeds = new ArrayList<String> ();
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// get stateful args
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for ( int i=0; i<args.length; i++ ) {
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if ( ! args[i].startsWith("-") ) {
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seeds.add(args[i]);
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} else {
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switch ( args[i].charAt(1) ) {
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case 's':
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if ( ++i >= args.length )
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usageExit();
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srcdir = args[i];
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break;
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case 'd':
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if ( ++i >= args.length )
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usageExit();
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destdir = args[i];
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break;
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case 'p':
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if ( ++i >= args.length )
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usageExit();
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pkgprefix = args[i];
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break;
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case 'r':
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recurse = true;
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break;
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case 'v':
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verbose = true;
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break;
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default:
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usageExit();
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break;
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}
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}
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}
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// echo version
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if ( verbose ) {
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System.out.println(version);
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System.out.println("srcdir: "+srcdir);
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System.out.println("destdir: "+destdir);
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System.out.println("files: "+files);
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System.out.println("recurse: "+recurse);
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}
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// collect up files to process
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for ( int i=0; i<seeds.size(); i++ )
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collectFiles( seeds.get(i) );
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// check for at least one file
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if ( files.size() <= 0 ) {
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System.err.println("no files found in "+seeds);
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System.exit(-1);
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}
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// process input files
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for ( InputFile inf : files )
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processFile( inf );
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} catch ( Exception ioe ) {
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System.err.println( ioe.toString() );
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System.exit(-2);
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}
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}
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private void collectFiles(String path) {
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File f = new File(path);
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if ( f.isDirectory() && recurse )
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scandir(f,pkgprefix);
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else if ( f.isFile() ) {
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File dir = f.getAbsoluteFile().getParentFile();
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if ( dir != null )
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scanfile( dir, f, pkgprefix );
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}
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}
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private void scandir(File dir, String javapackage) {
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File[] f = dir.listFiles();
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for ( int i=0; i<f.length; i++ )
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scanfile( dir, f[i], javapackage );
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}
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private void scanfile(File dir, File f, String javapackage) {
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if ( f.exists() ) {
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if ( f.isDirectory() && recurse )
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scandir( f, (javapackage!=null? javapackage+"."+f.getName(): f.getName()) );
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else if ( f.isFile() && f.getName().endsWith(".lua") )
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files.add( new InputFile(dir,f,javapackage) );
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}
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}
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class InputFile {
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public File infile;
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public File outdir;
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public File outfile;
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public String javapackage;
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public String javaclassname;
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public InputFile(File dir, File f, String javapackage) {
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String outdirpath = javapackage!=null? destdir+"/"+javapackage.replace('.', '/'): destdir;
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this.javaclassname = f.getName().substring(0,f.getName().lastIndexOf('.'));
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this.javapackage = javapackage;
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this.infile = f;
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this.outdir = new File(outdirpath);
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this.outfile = new File(outdirpath+"/"+this.javaclassname+".java");
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}
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}
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private void processFile( InputFile inf ) {
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inf.outdir.mkdirs();
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try {
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if ( verbose )
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System.out.println(
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"pkg="+inf.javapackage+" file="+inf.javaclassname+".java dest="+inf.outfile+" src="+inf.infile);
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FileInputStream in = new FileInputStream(inf.infile);
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FileOutputStream out = new FileOutputStream(inf.outfile);
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PrintWriter pw = new PrintWriter(out);
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LuaParser parser = new LuaParser(in);
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Chunk chunk = parser.Chunk();
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new JavaCodeGen(chunk,pw,inf.javapackage,inf.javaclassname);
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pw.close();
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out.close();
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in.close();
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} catch ( Throwable t ) {
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t.printStackTrace( System.err );
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}
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}
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}
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