trace.java

Java写的ERP系统

/******************************************************************************
 * The contents of this file are subject to the   Compiere License  Version 1.1
 * ("License"); You may not use this file except in compliance with the License
 * You may obtain a copy of the License at http://www.compiere.org/license.html
 * 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                  Compiere  ERP & CRM  Business Solution
 * The Initial Developer of the Original Code is Jorg Janke  and ComPiere, Inc.
 * Portions created by Jorg Janke are Copyright (C) 1999-2001 Jorg Janke, parts
 * created by ComPiere are Copyright (C) ComPiere, Inc.;   All Rights Reserved.
 * Contributor(s): ______________________________________.
 *****************************************************************************/
package org.compiere.util;

import java.io.*;
import java.util.*;

/**
 *  Trace Information
 *
 *  @author     Jorg Janke
 *  @version    $Id: Trace.java,v 1.4 2002/09/01 22:34:37 jjanke Exp $
 */
public class Trace
{
	/**
	 * Get Caller Array
	 *
	 * @param caller Optional Thowable/Exception
	 * @param maxNestLevel maximum call nesting level - 0 is all
	 * @return Array of class.method(file:line)
	 */
	public static String[] getCallerClasses (Throwable caller, int maxNestLevel)
	{
		int nestLevel = maxNestLevel;
		if (nestLevel < 1)
			nestLevel = 99;
		//
		ArrayList list = new ArrayList();
		Throwable t = caller;
		if (t == null)
			t = new Throwable();

		StackTraceElement[] elements = t.getStackTrace();
		for (int i = 0; i < elements.length && list.size() <= maxNestLevel; i++)
		{
			String className = elements[i].getClassName();
		//	System.out.println(list.size() + ": " + className);
			if (!(className.startsWith("org.compiere.util.Trace")
				|| className.startsWith("java.lang.Throwable")))
				list.add(className);
		}

		String[] retValue = new String[list.size()];
		list.toArray(retValue);
		return retValue;
	}   //  getCallerClasses

	/**
	 *  Get Caller with nest Level
	 *  @param nestLevel Nesting Level - 0=calling method, 1=previous, ..
	 *  @return class name and line info of nesting level or "" if not exist
	 */
	public static String getCallerClass (int nestLevel)
	{
		String[] array = getCallerClasses (null, nestLevel);
		if (array.length < nestLevel)
			return "";
		return array[nestLevel];
	}   //  getCallerClass

	/**
	 *  Print Stack Tace Info (raw)
	 */
	public static void printStack()
	{
		Throwable t = new Throwable();
		t.printStackTrace();
	}   //  printStack
}   //  Trace