Mega Code Archive
JavaP prints structural information about classes
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/*
* Copyright (c) Ian F. Darwin, http://www.darwinsys.com/, 1996-2002.
* All rights reserved. Software written by Ian F. Darwin and others.
* $Id: LICENSE,v 1.8 2004/02/09 03:33:38 ian Exp $
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. 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.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 THE AUTHOR 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.
*
* Java, the Duke mascot, and all variants of Sun's Java "steaming coffee
* cup" logo are trademarks of Sun Microsystems. Sun's, and James Gosling's,
* pioneering role in inventing and promulgating (and standardizing) the Java
* language and environment is gratefully acknowledged.
*
* The pioneering role of Dennis Ritchie and Bjarne Stroustrup, of AT&T, for
* inventing predecessor languages C and C++ is also gratefully acknowledged.
*/
import java.lang.reflect.Constructor;
import java.lang.reflect.Field;
import java.lang.reflect.Method;
import java.lang.reflect.Modifier;
/**
* JavaP prints structural information about classes. For each class, all public
* fields and methods are listed. The "Reflection" API is used to look up the
* information.
*
* @version $Id: MyJavaP.java,v 1.6 2004/03/14 17:45:51 ian Exp $
*/
public class MyJavaP {
/**
* Simple main program, construct self, process each class name found in
* argv.
*/
public static void main(String[] argv) {
MyJavaP pp = new MyJavaP();
if (argv.length == 0) {
System.err.println("Usage: MyJavaP className [...]");
System.exit(1);
} else
for (int i = 0; i < argv.length; i++)
pp.doClass(argv[i]);
}
/**
* Format the fields and methods of one class, given its name.
*/
protected void doClass(String className) {
try {
Class c = Class.forName(className);
System.out.println(Modifier.toString(c.getModifiers()) + ' ' + c
+ " {");
int mods;
Field fields[] = c.getDeclaredFields();
for (int i = 0; i < fields.length; i++) {
if (!Modifier.isPrivate(fields[i].getModifiers())
&& !Modifier.isProtected(fields[i].getModifiers()))
System.out.println("\t" + fields[i]);
}
Constructor[] constructors = c.getConstructors();
for (int j = 0; j < constructors.length; j++) {
Constructor constructor = constructors[j];
System.out.println("\t" + constructor);
}
Method methods[] = c.getDeclaredMethods();
for (int i = 0; i < methods.length; i++) {
if (!Modifier.isPrivate(methods[i].getModifiers())
&& !Modifier.isProtected(methods[i].getModifiers()))
System.out.println("\t" + methods[i]);
}
System.out.println("}");
} catch (ClassNotFoundException e) {
System.err.println("Error: Class " + className + " not found!");
} catch (Exception e) {
System.err.println(e);
}
}
}
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