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| 1 | /* | ||
| 2 | * Copyright (c) 2004, Oracle and/or its affiliates. All rights reserved. | ||
| 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. | ||
| 4 | * | ||
| 5 | * This code is free software; you can redistribute it and/or modify it | ||
| 6 | * under the terms of the GNU General Public License version 2 only, as | ||
| 7 | * published by the Free Software Foundation. Oracle designates this | ||
| 8 | * particular file as subject to the "Classpath" exception as provided | ||
| 9 | * by Oracle in the LICENSE file that accompanied this code. | ||
| 10 | * | ||
| 11 | * This code is distributed in the hope that it will be useful, but WITHOUT | ||
| 12 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | ||
| 13 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | ||
| 14 | * version 2 for more details (a copy is included in the LICENSE file that | ||
| 15 | * accompanied this code). | ||
| 16 | * | ||
| 17 | * You should have received a copy of the GNU General Public License version | ||
| 18 | * 2 along with this work; if not, write to the Free Software Foundation, | ||
| 19 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | ||
| 20 | * | ||
| 21 | * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA | ||
| 22 | * or visit www.oracle.com if you need additional information or have any | ||
| 23 | * questions. | ||
| 24 | */ | ||
| 25 | |||
| 26 | package sun.jvmstat.perfdata.monitor; | ||
| 27 | |||
| 28 | import java.net.*; | ||
| 29 | import java.io.*; | ||
| 30 | import java.util.*; | ||
| 31 | import java.util.regex.*; | ||
| 32 | |||
| 33 | /** | ||
| 34 | * Class for parsing alias files. File format is expected to follow | ||
| 35 | * the following syntax: | ||
| 36 | * | ||
| 37 | * alias name [alias]* | ||
| 38 | * | ||
| 39 | * Java style comments can occur anywhere within the file. | ||
| 40 | * @author Brian Doherty | ||
| 41 | * @since 1.5 | ||
| 42 | */ | ||
| 43 | public class AliasFileParser { | ||
| 44 | private static final String ALIAS = "alias"; | ||
| 45 | private static final boolean DEBUG = false; | ||
| 46 | |||
| 47 | // other variables | ||
| 48 | private URL inputfile; | ||
| 49 | private StreamTokenizer st; | ||
| 50 | private Token currentToken; | ||
| 51 | |||
| 52 | AliasFileParser(URL inputfile) { | ||
| 53 | this.inputfile = inputfile; | ||
| 54 | } | ||
| 55 | |||
| 56 | // value class to hold StreamTokenizer token values | ||
| 57 | private class Token { | ||
| 58 | public String sval; | ||
| 59 | public int ttype; | ||
| 60 | |||
| 61 | public Token(int ttype, String sval) { | ||
| 62 | this.ttype = ttype; | ||
| 63 | this.sval = sval; | ||
| 64 | } | ||
| 65 | } | ||
| 66 | |||
| 67 | private void logln(String s) { | ||
| 68 | if (DEBUG) { | ||
| 69 | System.err.println(s); | ||
| 70 | } | ||
| 71 | } | ||
| 72 | |||
| 73 | /** | ||
| 74 | * method to get the next token as a Token type | ||
| 75 | */ | ||
| 76 | private void nextToken() throws IOException { | ||
| 77 | st.nextToken(); | ||
| 78 | currentToken = new Token(st.ttype, st.sval); | ||
| 79 | |||
| 80 | logln("Read token: type = " + currentToken.ttype | ||
| 81 | + " string = " + currentToken.sval); | ||
| 82 | } | ||
| 83 | |||
| 84 | /** | ||
| 85 | * method to match the current Token to a specified token type and | ||
| 86 | * value Throws a SyntaxException if token doesn't match. | ||
| 87 | */ | ||
| 88 | private void match(int ttype, String token) | ||
| 89 | throws IOException, SyntaxException { | ||
| 90 | |||
| 91 | if ((currentToken.ttype == ttype) | ||
| 92 | && (currentToken.sval.compareTo(token) == 0)) { | ||
| 93 | logln("matched type: " + ttype + " and token = " | ||
| 94 | + currentToken.sval); | ||
| 95 | nextToken(); | ||
| 96 | } else { | ||
| 97 | throw new SyntaxException(st.lineno()); | ||
| 98 | } | ||
| 99 | } | ||
| 100 | |||
| 101 | |||
| 102 | /* | ||
| 103 | * method to match the current Token to a specified token type. | ||
| 104 | * Throws a SyntaxException if token doesn't match. | ||
| 105 | */ | ||
| 106 | private void match(int ttype) throws IOException, SyntaxException { | ||
| 107 | if (currentToken.ttype == ttype) { | ||
| 108 | logln("matched type: " + ttype + ", token = " + currentToken.sval); | ||
| 109 | nextToken(); | ||
| 110 | } else { | ||
| 111 | throw new SyntaxException(st.lineno()); | ||
| 112 | } | ||
| 113 | } | ||
| 114 | |||
| 115 | private void match(String token) throws IOException, SyntaxException { | ||
| 116 | match(StreamTokenizer.TT_WORD, token); | ||
| 117 | } | ||
| 118 | |||
| 119 | /** | ||
| 120 | * method to parse the given input file. | ||
| 121 | */ | ||
| 122 | public void parse(Map<String, ArrayList<String>> map) throws SyntaxException, IOException { | ||
| 123 | |||
| 124 | if (inputfile == null) { | ||
| 125 | return; | ||
| 126 | } | ||
| 127 | |||
| 128 | BufferedReader r = new BufferedReader( | ||
| 129 | new InputStreamReader(inputfile.openStream())); | ||
| 130 | st = new StreamTokenizer(r); | ||
| 131 | |||
| 132 | // allow both forms of commenting styles | ||
| 133 | st.slashSlashComments(true); | ||
| 134 | st.slashStarComments(true); | ||
| 135 | st.wordChars('_','_'); | ||
| 136 | |||
| 137 | nextToken(); | ||
| 138 | |||
| 139 | while (currentToken.ttype != StreamTokenizer.TT_EOF) { | ||
| 140 | // look for the start symbol | ||
| 141 | if ((currentToken.ttype != StreamTokenizer.TT_WORD) | ||
| 142 | || (currentToken.sval.compareTo(ALIAS) != 0)) { | ||
| 143 | nextToken(); | ||
| 144 | continue; | ||
| 145 | } | ||
| 146 | |||
| 147 | match(ALIAS); | ||
| 148 | String name = currentToken.sval; | ||
| 149 | match(StreamTokenizer.TT_WORD); | ||
| 150 | |||
| 151 | ArrayList<String> aliases = new ArrayList<String>(); | ||
| 152 | |||
| 153 | do { | ||
| 154 | aliases.add(currentToken.sval); | ||
| 155 | match(StreamTokenizer.TT_WORD); | ||
| 156 | |||
| 157 | } while ((currentToken.ttype != StreamTokenizer.TT_EOF) | ||
| 158 | && (currentToken.sval.compareTo(ALIAS) != 0)); | ||
| 159 | |||
| 160 | logln("adding map entry for " + name + " values = " + aliases); | ||
| 161 | |||
| 162 | map.put(name, aliases); | ||
| 163 | } | ||
| 164 | } | ||
| 165 | } | ||