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/* -*- Mode: JDE; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
*
* This file is part of the debugger and core tools for the AspectJ(tm)
* programming language; see http://aspectj.org
*
* The contents of this file are subject to the Mozilla Public License
* Version 1.1 (the "License"); you may not use this file except in
* compliance with the License. You may obtain a copy of the License at
* either http://www.mozilla.org/MPL/ or http://aspectj.org/MPL/.
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is AspectJ.
*
* The Initial Developer of the Original Code is Xerox Corporation. Portions
* created by Xerox Corporation are Copyright (C) 1999-2002 Xerox Corporation.
* All Rights Reserved.
*/
package org.aspectj.tools.ajdoc;
/**
* Entry point for ajdoc.
*
* @author Jeff Palm
*/
public class Main {
/**
* value returned from execute(..)
* when the JDK tools are not supported
*/
public static final int PLATFORM_ERROR = 3;
/**
* Call {@link #execute} and exit with
* its exit code.
*
* @param args Command line arguments.
*/
public static void main(String[] args) {
System.exit(execute(args));
}
/**
* Programmatic entry without calling <code>System.exit</code>,
* returning the result of {@link Ajdoc#execute(String[])}.
*
* @param args Command line arguments.
* @return PLATFORM_ERROR if platformErrorMessage() is not null
* or the result of calling {@link Ajdoc#execute(String[])}.
* @throw Error if bad platform - look at message
*/
public static int execute(String[] args) {
int result = 0;
String platformError = platformErrorMessage();
if (null != platformError) {
result = PLATFORM_ERROR;
System.err.println(platformError);
} else {
Ajdoc me = new Ajdoc();
result = me.execute(args);
}
return result;
}
/**
* Generate version error message if we cannot run in this VM
* or using this class path.
* @return null if no error or String describing error otherwise
*/
public static String platformErrorMessage() {
// todo: stolen from ajc.Main
boolean failed = false;
final String[] versions = new String[]
{ "java.lang.reflect.Proxy" // 1.3: failed if class not found
// permit users to run in 1.4 iff using 1.3 tools.jar
//, "java.lang.CharSequence" // 1.4: failed if class found
};
for (int i = 0; i < versions.length; i++) {
try {
Class.forName(versions[i]);
failed = (i == 1);
} catch (ClassNotFoundException cnfe) {
failed = (i == 0);
} catch (Error err) {
failed = (i == 0);
}
if (failed) {
String version = "(unknown version)";
try { version = System.getProperty("java.version"); }
catch (Throwable t) { } // ignore
return "Ajdoc requires J2SE 1.3; not java " + version;
}
}
// now looking for tools.jar
try {
Class.forName("com.sun.javadoc.RootDoc"); // may be version error
Class.forName("com.sun.javadoc.Type"); // not in 1.4
} catch (ClassNotFoundException cnfe) {
// System.err.println(cnfe.getMessage());
// cnfe.printStackTrace(System.err); // XXX
return "Requires tools.jar from J2SE 1.3 (not 1.2 or 1.4) be on the class path";
} catch (Error err) { // probably wrong version of the class
// System.err.println(err.getMessage());
// err.printStackTrace(System.err); // XXX
return "Requires tools.jar from J2SE 1.3 (not 1.2 or 1.4) be on the class path";
}
return null;
}
}
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