| /* |
| * Copyright (c) 2004, 2014, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. Oracle designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Oracle in the LICENSE file that accompanied this code. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| package sun.jvmstat.perfdata.monitor; |
| |
| import java.net.*; |
| import java.io.*; |
| import java.util.*; |
| import java.util.regex.*; |
| |
| /** |
| * Class for parsing alias files. File format is expected to follow |
| * the following syntax: |
| * |
| * alias name [alias]* |
| * |
| * Java style comments can occur anywhere within the file. |
| * @author Brian Doherty |
| * @since 1.5 |
| */ |
| public class AliasFileParser { |
| private static final String ALIAS = "alias"; |
| // 8028357 removed old, inefficient debug logging |
| |
| // other variables |
| private URL inputfile; |
| private StreamTokenizer st; |
| private Token currentToken; |
| |
| AliasFileParser(URL inputfile) { |
| this.inputfile = inputfile; |
| } |
| |
| // value class to hold StreamTokenizer token values |
| private class Token { |
| public String sval; |
| public int ttype; |
| |
| public Token(int ttype, String sval) { |
| this.ttype = ttype; |
| this.sval = sval; |
| } |
| } |
| |
| /** |
| * method to get the next token as a Token type |
| */ |
| private void nextToken() throws IOException { |
| st.nextToken(); |
| currentToken = new Token(st.ttype, st.sval); |
| } |
| |
| /** |
| * method to match the current Token to a specified token type and |
| * value Throws a SyntaxException if token doesn't match. |
| */ |
| private void match(int ttype, String token) |
| throws IOException, SyntaxException { |
| |
| if ((currentToken.ttype == ttype) |
| && (currentToken.sval.compareTo(token) == 0)) { |
| nextToken(); |
| } else { |
| throw new SyntaxException(st.lineno()); |
| } |
| } |
| |
| |
| /* |
| * method to match the current Token to a specified token type. |
| * Throws a SyntaxException if token doesn't match. |
| */ |
| private void match(int ttype) throws IOException, SyntaxException { |
| if (currentToken.ttype == ttype) { |
| nextToken(); |
| } else { |
| throw new SyntaxException(st.lineno()); |
| } |
| } |
| |
| private void match(String token) throws IOException, SyntaxException { |
| match(StreamTokenizer.TT_WORD, token); |
| } |
| |
| /** |
| * method to parse the given input file. |
| */ |
| public void parse(Map<String, ArrayList<String>> map) throws SyntaxException, IOException { |
| |
| if (inputfile == null) { |
| return; |
| } |
| |
| BufferedReader r = new BufferedReader( |
| new InputStreamReader(inputfile.openStream())); |
| st = new StreamTokenizer(r); |
| |
| // allow both forms of commenting styles |
| st.slashSlashComments(true); |
| st.slashStarComments(true); |
| st.wordChars('_','_'); |
| |
| nextToken(); |
| |
| while (currentToken.ttype != StreamTokenizer.TT_EOF) { |
| // look for the start symbol |
| if ((currentToken.ttype != StreamTokenizer.TT_WORD) |
| || (currentToken.sval.compareTo(ALIAS) != 0)) { |
| nextToken(); |
| continue; |
| } |
| |
| match(ALIAS); |
| String name = currentToken.sval; |
| match(StreamTokenizer.TT_WORD); |
| |
| ArrayList<String> aliases = new ArrayList<String>(); |
| |
| do { |
| aliases.add(currentToken.sval); |
| match(StreamTokenizer.TT_WORD); |
| |
| } while ((currentToken.ttype != StreamTokenizer.TT_EOF) |
| && (currentToken.sval.compareTo(ALIAS) != 0)); |
| |
| map.put(name, aliases); |
| } |
| } |
| } |