1 /* 2 * Copyright (c) 2004, 2010, 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.tools.jstat; 27 28 import java.util.*; 29 import java.net.*; 30 import java.io.*; 31 32 /** 33 * A class for listing the available options in the jstat_options file. 34 * 35 * @author Brian Doherty 36 * @since 1.5 37 */ 38 public class OptionLister { 39 private static final boolean debug = false; 40 private List<URL> sources; 41 42 public OptionLister(List<URL> sources) { 43 this.sources = sources; 44 } 45 46 public void print(PrintStream ps) { 47 Comparator<OptionFormat> c = new Comparator<OptionFormat>() { 48 public int compare(OptionFormat o1, OptionFormat o2) { 49 OptionFormat of1 = o1; 50 OptionFormat of2 = o2; 51 return (of1.getName().compareTo(of2.getName())); 52 } 53 }; 54 55 Set<OptionFormat> options = new TreeSet<OptionFormat>(c); 56 57 for (URL u : sources) { 58 try { 59 Reader r = new BufferedReader( 60 new InputStreamReader(u.openStream())); 61 Set<OptionFormat> s = new Parser(r).parseOptions(); 62 options.addAll(s); 63 } catch (IOException e) { 64 if (debug) { 65 System.err.println(e.getMessage()); 66 e.printStackTrace(); 67 } 68 } catch (ParserException e) { 69 // Exception in parsing the options file. 70 System.err.println(u + ": " + e.getMessage()); 71 System.err.println("Parsing of " + u + " aborted"); 72 } 73 } 74 75 for ( OptionFormat of : options) { 76 if (of.getName().compareTo("timestamp") == 0) { 77 // ignore the special timestamp OptionFormat. 78 continue; 79 } 80 ps.println("-" + of.getName()); 81 } 82 } 83 }