/* Copyright (c) 2001-2014, 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()</b> if any invocation fails.
*
* @author Blaine Simpson (blaine dot simpson at admc dot com)
* @since HSQLDB 1.8.0
* @version $Revision: 5337 $, $Date: 2014-01-24 14:26:47 -0500 (Fri, 24 Jan 2014) $
*/
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 final
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");
}
}