/* Copyright (c) 2001-2010, 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;
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* 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()</b> if any invocation fails.
*
* @author Blaine Simpson (blaine dot simpson at admc dot com)
* @since HSQLDB 1.8.0
* @version $Revision: 3481 $, $Date: 2010-02-26 13:05:06 -0500 (Fri, 26 Feb 2010) $
*/
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()</b> 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");
}
}