QLog

QLog.java

package com.bizzby.utils;

import android.util.Log;

import java.io.PrintWriter;
import java.io.StringWriter;

public class QLog
{

  public static final int NONE = 0;
  public static final int ERRORS_ONLY = 1;
	public static final int ERRORS_WARNINGS = 2;
	public static final int ERRORS_WARNINGS_INFO = 3;
	public static final int ERRORS_WARNINGS_INFO_DEBUG = 4;
	public static final int ALL = 5;

	public static int LOGGING_LEVEL = 0;

	/*
	 * For filtering app specific output
	 */
	private static final String TAG = "BIZZBY";
	/*
	 * So any important logs can be outputted in non filtered output also
	 */
	private static final String TAG_GENERAL_OUTPUT = "Log";

	static
	{
		i("Log class reloaded");
	}

	/**
	 * @param obj
	 * @param cause
	 *            The exception which caused this error, may not be null
	 */
	public static void e(final Object obj, final Throwable cause)
	{
		if (LOGGING_LEVEL > NONE)
		{
			Log.e(TAG, getTrace() + String.valueOf(obj));
			Log.e(TAG, getThrowableTrace(cause));
			// Log.e(TAG_GENERAL_OUTPUT, getTrace() + String.valueOf(obj));
			// Log.e(TAG_GENERAL_OUTPUT, getThrowableTrace(cause));
		}
	}

	public static void e(final Object obj)
	{
		if (LOGGING_LEVEL > NONE)
		{
			Log.e(TAG, getTrace() + String.valueOf(obj));
			// Log.e(TAG_GENERAL_OUTPUT, getTrace() + String.valueOf(obj));
		}
	}

	public static void w(final Object obj, final Throwable cause)
	{
		if (LOGGING_LEVEL > ERRORS_ONLY)
		{
			Log.w(TAG, getTrace() + String.valueOf(obj));
			Log.w(TAG, getThrowableTrace(cause));
			// Log.w(TAG_GENERAL_OUTPUT, getTrace() + String.valueOf(obj));
			// Log.w(TAG_GENERAL_OUTPUT, getThrowableTrace(cause));
		}
	}

	public static void w(final Object obj)
	{
		if (LOGGING_LEVEL > ERRORS_ONLY)
		{
			Log.w(TAG, getTrace() + String.valueOf(obj));
			// Log.w(TAG_GENERAL_OUTPUT, getTrace() + String.valueOf(obj));
		}
	}

	public static void i(final Object obj)
	{
		if (LOGGING_LEVEL > ERRORS_WARNINGS)
		{
			Log.i(TAG, getTrace() + String.valueOf(obj));
		}
	}

	public static void d(final Object obj)
	{
		if (LOGGING_LEVEL > ERRORS_WARNINGS_INFO)
		{
			Log.d(TAG, getTrace() + String.valueOf(obj));
		}
	}

	public static void v(final Object obj)
	{
		if (LOGGING_LEVEL > ERRORS_WARNINGS_INFO_DEBUG)
		{
			Log.v(TAG, getTrace() + String.valueOf(obj));
		}
	}

	private static String getThrowableTrace(final Throwable thr)
	{
        if(thr == null) return "Throwable was Null";
        final StringWriter b = new StringWriter();
		thr.printStackTrace(new PrintWriter(b));
		return b.toString();
	}

	private static String getTrace()
	{
		int depth = 2;
		Throwable t = new Throwable();
		StackTraceElement[] elements = t.getStackTrace();
		String callerMethodName = elements[depth].getMethodName();
		String callerClassPath = elements[depth].getClassName();
		int lineNo = elements[depth].getLineNumber();
		int i = callerClassPath.lastIndexOf('.');
		String callerClassName = callerClassPath.substring(i + 1);
        return callerClassName + ": " + callerMethodName + "() [" + lineNo + "] - ";
	}

	/**
	 * Prints the stack trace to mubaloo log and standard log
	 * 
	 * @param e
	 */
	public static void handleException(final Exception e)
	{
		QLog.e(e.toString());
		e.printStackTrace();
	}

    private QLog()
    {
    }
}