| 1 | /* |
| 2 | Copyright (C) 2004 MySQL AB |
| 3 | |
| 4 | This program is free software; you can redistribute it and/or modify |
| 5 | it under the terms of the GNU General Public License version 2 as |
| 6 | published by the Free Software Foundation. |
| 7 | |
| 8 | This program is distributed in the hope that it will be useful, |
| 9 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 10 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 11 | GNU General Public License for more details. |
| 12 | |
| 13 | You should have received a copy of the GNU General Public License |
| 14 | along with this program; if not, write to the Free Software |
| 15 | Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| 16 | |
| 17 | */ |
| 18 | package com.mysql.management; |
| 19 | |
| 20 | import java.io.PrintStream; |
| 21 | import java.util.LinkedHashMap; |
| 22 | import java.util.Map; |
| 23 | |
| 24 | import com.mysql.management.util.Utils; |
| 25 | |
| 26 | /* |
| 27 | * TODO Replace this with something less fragile than text parsing. Perhaps an |
| 28 | * api could be added to the server? |
| 29 | */ |
| 30 | |
| 31 | /** |
| 32 | * This class is final simply as a hint to the compiler, it may be un-finalized |
| 33 | * safely. |
| 34 | * |
| 35 | * @author Eric Herman <eric@mysql.com> |
| 36 | * @version $Id: HelpOptionsParser.java,v 1.22 2005/10/25 19:11:16 eherman Exp $ |
| 37 | */ |
| 38 | final class HelpOptionsParser { |
| 39 | |
| 40 | private static final String DIVIDER = "--------------------------------- -----------------------------"; |
| 41 | |
| 42 | private static final String END_TEXT = "To see what values a running"; |
| 43 | |
| 44 | private static final String NO_DEFAULT_VALUE = "(No default value)"; |
| 45 | |
| 46 | private PrintStream err; |
| 47 | |
| 48 | private Utils utils; |
| 49 | |
| 50 | HelpOptionsParser(PrintStream err, Utils utils) { |
| 51 | this.err = err; |
| 52 | this.utils = utils; |
| 53 | } |
| 54 | |
| 55 | public Map getOptionsFromHelp(String help) { |
| 56 | String trimmed = trimToOptions(help); |
| 57 | |
| 58 | Map map = new LinkedHashMap(); |
| 59 | String[] lines = utils.str().splitLines(trimmed); |
| 60 | for (int i = 0; i < lines.length; i++) { |
| 61 | String line = lines[i]; |
| 62 | if (line.indexOf(' ') <= 0) { |
| 63 | continue; |
| 64 | } |
| 65 | String key = line.substring(0, line.indexOf(' ')); |
| 66 | String val = line.substring(key.length()).trim(); |
| 67 | if (val.equals(NO_DEFAULT_VALUE)) { |
| 68 | val = ""; |
| 69 | } |
| 70 | map.put(key, val); |
| 71 | } |
| 72 | |
| 73 | map.remove("help"); |
| 74 | map.remove("verbose"); |
| 75 | |
| 76 | return map; |
| 77 | } |
| 78 | |
| 79 | String trimToOptions(String help) { |
| 80 | boolean success = false; |
| 81 | try { |
| 82 | String trimmedHelp = trimToOptionsInner(help); |
| 83 | success = true; |
| 84 | return trimmedHelp; |
| 85 | } finally { |
| 86 | if (!success) { |
| 87 | synchronized (err) { |
| 88 | printMsg(err, "parsing unseccessful:"); |
| 89 | printMsg(err, "===== BEGIN MYSQLD HELP OPTIONS TEXT ====="); |
| 90 | err.println(help); |
| 91 | printMsg(err, "===== END MYSQLD HELP OPTIONS TEXT ====="); |
| 92 | } |
| 93 | } |
| 94 | } |
| 95 | } |
| 96 | |
| 97 | private String trimToOptionsInner(String help) { |
| 98 | int dividerPos = help.indexOf(DIVIDER); |
| 99 | int start = dividerPos + DIVIDER.length(); |
| 100 | int stop = help.indexOf(END_TEXT); |
| 101 | if (dividerPos == -1) { |
| 102 | synchronized (err) { |
| 103 | printMsg(err, "Divider=\"" + DIVIDER + "\""); |
| 104 | printMsg(err, "found at: " + dividerPos); |
| 105 | printMsg(err, "Start Position:" + start); |
| 106 | printMsg(err, "End Text=\"" + END_TEXT + "\""); |
| 107 | printMsg(err, "found at: " + stop); |
| 108 | printMsg(err, "HELP TEXT BEGIN"); |
| 109 | printMsg(err, help); |
| 110 | printMsg(err, "HELP TEXT END"); |
| 111 | } |
| 112 | throw new RuntimeException("could not parse help text"); |
| 113 | } |
| 114 | if (stop < start) { |
| 115 | stop = help.length(); |
| 116 | } |
| 117 | String options = help.substring(start, stop); |
| 118 | return options + System.getProperty("line.separator"); |
| 119 | } |
| 120 | |
| 121 | private void printMsg(PrintStream ps, String msg) { |
| 122 | synchronized (ps) { |
| 123 | ps.print("["); |
| 124 | ps.print(utils.str().shortClassName(this)); |
| 125 | ps.print("] "); |
| 126 | ps.println(msg); |
| 127 | } |
| 128 | } |
| 129 | } |