Quadcap Embeddable Server

com/quadcap/http/servlets/jsp/Javac.java

Go to the documentation of this file.

package com.quadcap.http.servlets.jsp;

/* Copyright 1999 - 2003 Quadcap Software.  All rights reserved.
 *
 * This software is distributed under the Quadcap Free Software License.
 * This software may be used or modified for any purpose, personal or
 * commercial.  Open Source redistributions are permitted.  Commercial
 * redistribution of larger works derived from, or works which bundle
 * this software requires a "Commercial Redistribution License"; see
 * http://www.quadcap.com/purchase.
 *
 * Redistributions qualify as "Open Source" under  one of the following terms:
 *   
 *    Redistributions are made at no charge beyond the reasonable cost of
 *    materials and delivery.
 *
 *    Redistributions are accompanied by a copy of the Source Code or by an
 *    irrevocable offer to provide a copy of the Source Code for up to three
 *    years at the cost of materials and delivery.  Such redistributions
 *    must allow further use, modification, and redistribution of the Source
 *    Code under substantially the same terms as this license.
 *
 * Redistributions of source code must retain the copyright notices as they
 * appear in each source code file, these license terms, and the
 * disclaimer/limitation of liability set forth as paragraph 6 below.
 *
 * Redistributions in binary form must reproduce this Copyright Notice,
 * these license terms, and the disclaimer/limitation of liability set
 * forth as paragraph 6 below, in the documentation and/or other materials
 * provided with the distribution.
 *
 * The Software is provided on an "AS IS" basis.  No warranty is
 * provided that the Software is free of defects, or fit for a
 * particular purpose.  
 *
 * Limitation of Liability. Quadcap Software shall not be liable
 * for any damages suffered by the Licensee or any third party resulting
 * from use of the Software.
 */

import java.io.OutputStream;
import java.util.ArrayList;

import sun.tools.javac.Main;

import com.quadcap.util.Debug;

/**
 * This compiler class uses javac to to the dirty work, in the sad
 * situation where Jikes can't be found.
 *
 * @author Stan Bailes
 */
public class Javac extends JavaCompiler {
    public Javac() {}

    final String chopLastQ(String s) {
        if (s.length() > 0 && s.charAt(s.length()-1) == '"') {
            s = s.substring(0, s.length()-1);
        }
        return s;
    }
    
    private final String[] parseArgs(String str) {
        ArrayList r = new ArrayList();
        int state = 0;          // skipws;
        StringBuffer sb = new StringBuffer();
        for (int i = 0; i < str.length(); i++) {
            final char c = str.charAt(i);
            switch (state) {
            case 0:
                if (!Character.isSpace(c)) {
                    if (c != '"') sb.append(c);
                    state = 1;
                }
                break;
            case 1:
                if (Character.isSpace(c)) {
                    r.add(chopLastQ(sb.toString()));
                    sb.setLength(0);
                    state = 1;
                    break;
                } else {
                    sb.append(c);
                }
                break;
            }
        }
        if (sb.length() > 0) {
            r.add(chopLastQ(sb.toString()));
        }
        if (r.size() == 0) return null;
        int i = 0;
        if (r.get(0).toString().equalsIgnoreCase("javac")) i++;
        String[] ret = new String[r.size() - i];
        for (int ri = 0; ri < ret.length; ri++) {
            ret[ri] = r.get(i++).toString();
        }
        return ret;
    }
                    
    public boolean doCompile(String cmd, OutputStream compileOutput) {
        Main compiler = new Main(compileOutput, "javac");
        return compiler.compile(parseArgs(cmd));
    }
}