Mega Code Archive
Get StackTraceElement
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//----------------------------------------------------------------------------//
// //
// C l a s s U t i l //
// //
// Copyright (C) Herve Bitteur 2000-2009. All rights reserved. //
// This software is released under the GNU General Public License. //
// Please contact users@audiveris.dev.java.net to report bugs & suggestions. //
//----------------------------------------------------------------------------//
//
/**
* Class <code>ClassUtil</code> provides utilities related to Class handling.
*
* @author Hervé Bitteur
* @version $Id: ClassUtil.java,v 1.3 2009/03/03 19:45:51 hbitteur Exp $
*/
public class ClassUtil
{
//~ Methods ----------------------------------------------------------------
//-----------------//
// getCallingFrame //
//-----------------//
/**
* Infer the calling frame, skipping the given classes if so provided.
* Code was derived from a private method found in the JDK Logger class
*
* @param skippedClasses the classes to skip
* @return the frame found, just before the skipped classes (or just before
* the caller of this method)
*/
public static StackTraceElement getCallingFrame (Class... skippedClasses)
{
// Get the current stack trace.
StackTraceElement[] stack = (new Throwable()).getStackTrace();
// Simple case, no classes to skip, just return the caller of the caller
if (skippedClasses.length == 0) {
return stack[2];
}
// More complex case, return the caller, just before the skipped classes
// First, search back to a method in the skipped classes, if any
int ix;
searchingForSkipped:
for (ix = 0; ix < stack.length; ix++) {
StackTraceElement frame = stack[ix];
String cname = frame.getClassName();
for (Class skipped : skippedClasses) {
if (cname.equals(skipped.getName())) {
break searchingForSkipped;
}
}
}
// Now search for the first frame before the skipped classes
searchingForNonSkipped:
for (; ix < stack.length; ix++) {
StackTraceElement frame = stack[ix];
String cname = frame.getClassName();
for (Class skipped : skippedClasses) {
if (cname.equals(skipped.getName())) {
continue searchingForNonSkipped;
}
}
// We've found the relevant frame.
return frame;
}
// We haven't found a suitable frame
return null;
}
//--------//
// nameOf //
//--------//
/**
* Report the full name of the object class, without the package information
*
* @param obj the object to name
* @return the concatenation of (enclosing) simple names
*/
public static String nameOf (Object obj)
{
StringBuilder sb = new StringBuilder();
for (Class cl = obj.getClass(); cl != null;
cl = cl.getEnclosingClass()) {
if (sb.length() > 0) {
sb.insert(0, "-");
}
sb.insert(0, cl.getSimpleName());
}
return sb.toString();
}
}
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