| /* |
| * Copyright (c) 2004, 2010, 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.tools.jstat; |
| |
| import java.util.*; |
| import java.net.*; |
| import java.io.*; |
| |
| /** |
| * A class for finding a specific special option in the jstat_options file. |
| * |
| * @author Brian Doherty |
| * @since 1.5 |
| */ |
| public class OptionFinder { |
| |
| private static final boolean debug = false; |
| |
| List<URL> optionsSources; |
| |
| public OptionFinder(List<URL> optionsSources) { |
| this.optionsSources = optionsSources; |
| } |
| |
| public OptionFormat getOptionFormat(String option, boolean useTimestamp) { |
| OptionFormat of = getOptionFormat(option, optionsSources); |
| OptionFormat tof = null; |
| if ((of != null) && (useTimestamp)) { |
| // prepend the timestamp column as first column |
| tof = getOptionFormat("timestamp", optionsSources); |
| if (tof != null) { |
| ColumnFormat cf = (ColumnFormat)tof.getSubFormat(0); |
| of.insertSubFormat(0, cf); |
| } |
| } |
| return of; |
| } |
| |
| protected OptionFormat getOptionFormat(String option, List<URL> sources) { |
| OptionFormat of = null; |
| for (URL u : sources) { |
| try { |
| Reader r = new BufferedReader( |
| new InputStreamReader(u.openStream())); |
| of = new Parser(r).parse(option); |
| if (of != null) |
| break; |
| } catch (IOException e) { |
| if (debug) { |
| System.err.println("Error processing " + u |
| + " : " + e.getMessage()); |
| e.printStackTrace(); |
| } |
| } catch (ParserException e) { |
| // Exception in parsing the options file. |
| System.err.println(u + ": " + e.getMessage()); |
| System.err.println("Parsing of " + u + " aborted"); |
| } |
| } |
| return of; |
| } |
| } |