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HSQLDB example source code file (MainInvoker.java)
The HSQLDB MainInvoker.java source code/* Copyright (c) 2001-2008, The HSQL Development Group * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions are met: * * Redistributions of source code must retain the above copyright notice, this * list of conditions and the following disclaimer. * * Redistributions in binary form must reproduce the above copyright notice, * this list of conditions and the following disclaimer in the documentation * and/or other materials provided with the distribution. * * Neither the name of the HSQL Development Group nor the names of its * contributors may be used to endorse or promote products derived from this * software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL HSQL DEVELOPMENT GROUP, HSQLDB.ORG, * OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ package org.hsqldb.util; import java.lang.reflect.InvocationTargetException; import java.lang.reflect.Method; import java.util.ArrayList; /** * Invokes the static main(String[]) method from each class specified. * * This class <b>will System.exit() if any invocation fails. * * @author Blaine Simpson (blaine dot simpson at admc dot com) * @since HSQLDB 1.8.0 * @version $Revision: 766 $, $Date: 2009-01-12 02:12:17 +0000 (Mon, 12 Jan 2009) $ */ public class MainInvoker { /* * This class currently consists of just a static utility. * It may or may not make sense to make this into a class with real * instances that can keep track of status of stuff invoked by it. */ private static String[] emptyStringArray = new String[0]; private static void syntaxFailure() { System.err.println(SYNTAX_MSG); System.exit(2); } /** * Invokes the static main(String[]) method from each specified class. * This method <b>will System.exit() if any invocation fails. * * Note that multiple class invocations are delimited by empty-string * parameters. How the user supplies these empty strings is determined * entirely by the caller's environment. From Windows this can * generally be accomplished with double-quotes like "". From all * popular UNIX shells, this can be accomplished with single or * double-quotes: '' or "". * * @param sa Run java org.hsqldb.util.MainInvoker --help for syntax help */ public static void main(String[] sa) { if (sa.length > 0 && sa[0].equals("--help")) { System.err.println(SYNTAX_MSG); System.exit(0); } ArrayList outList = new ArrayList(); int curInArg = -1; try { while (++curInArg < sa.length) { if (sa[curInArg].length() < 1) { if (outList.size() < 1) { syntaxFailure(); } invoke((String) outList.remove(0), (String[]) outList.toArray(emptyStringArray)); outList.clear(); } else { outList.add(sa[curInArg]); } } if (outList.size() < 1) { syntaxFailure(); } invoke((String) outList.remove(0), (String[]) outList.toArray(emptyStringArray)); } catch (Exception e) { e.printStackTrace(); System.exit(1); } } public static String LS = System.getProperty("line.separator"); private static String SYNTAX_MSG = " java org.hsqldb.util.MainInvoker " + "[package1.Class1 [arg1a arg1b...] \"\"]... \\\n" + " packageX.ClassX [argXa argXb...]\n" + "OR\n" + " java org.hsqldb.util.MainInvoker --help\n\n" + "Note that you can only invoke classes in 'named' (non-default) " + "packages. Delimit multiple classes with empty strings."; static { if (!LS.equals("\n")) { SYNTAX_MSG = SYNTAX_MSG.replaceAll("\n", LS); } } /** * Invokes the static main(String[]) method from each specified class. */ public static void invoke(String className, String[] args) throws ClassNotFoundException, NoSuchMethodException, IllegalAccessException, InvocationTargetException { Class c; Method method; Class[] stringArrayCA = { emptyStringArray.getClass() }; Object[] objectArray = { (args == null) ? emptyStringArray : args }; c = Class.forName(className); method = c.getMethod("main", stringArrayCA); method.invoke(null, objectArray); //System.err.println(c.getName() + ".main() invoked"); } } Other HSQLDB examples (source code examples)Here is a short list of links related to this HSQLDB MainInvoker.java source code file: |
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