/*

* Copyright (c) 2010 Nokia Corporation and/or its subsidiary(-ies).

* All rights reserved.

* This component and the accompanying materials are made available

* under the terms of "Eclipse Public License v1.0"

* which accompanies this distribution, and is available

* at the URL "http://www.eclipse.org/legal/epl-v10.html".

*

* Initial Contributors:

* Nokia Corporation - initial contribution.

*

* Contributors:

*

* Description:

*

*/

package com.nokia.mj.impl.rt.support;

import java.util.Hashtable;

import java.util.Enumeration;

class FinalizerStatistics

{

    private static Hashtable mReferences = new Hashtable();

    private static final boolean mTrace = false;

    private static class Refcount

    {

        int    mCount;

        String mClassName;

        private Refcount(String className)

        {

            mCount = 1;

            mClassName = className;

        }

    }

    public static void finalizableCreated(String className)

    {

        synchronized (mReferences)

        {

            Refcount r = (Refcount)mReferences.get(className);

            int count = 1;

            if (r != null)

            {

                r.mCount++;

                count = r.mCount;

            }

            else

            {

                mReferences.put(className, new Refcount(className));

            }

            if (mTrace) System.out.println("Finalizable created. name: " +

                                               className + ", count: " + count);

        }

    }

    public static void classFinalized(String className)

    {

        synchronized (mReferences)

        {

            Refcount r = (Refcount)mReferences.get(className);

            r.mCount--;

            if (mTrace) System.out.println("Finalizable destroyed. name: " +

                                               className + ", count: " + r.mCount);

        }

    }

    public static boolean getNonfinalizedObjects(StringBuffer sb)

    {

        synchronized (mReferences)

        {

            sb.append("Finalizable objects\n");

            Enumeration e = mReferences.elements();

            boolean allFinalized = true;

            while (e.hasMoreElements())

            {

                Refcount r = (Refcount)e.nextElement();

                if (r != null)

                {

                    if (r.mCount != 0)

                    {

                        allFinalized = false;

                    }

                    sb.append("  class=" + r.mClassName +

                              " count="  + r.mCount + "\n");

                }

            }

            sb.append("\nStatus ");

            if (allFinalized)

            {

                sb.append("ALL FINALIZED");

            }

            else

            {

                sb.append("OBJECTS WAITING FOR FINALIZATION");

            }

            if (mTrace) System.out.println(sb.toString());

            return allFinalized;

        }

    }

    public static void reset()

    {

        mReferences.clear();

    }

}