/* 
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 * 
 *   http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed  under the  License is distributed on an "AS IS" BASIS,
 * WITHOUT  WARRANTIES OR CONDITIONS  OF ANY KIND, either  express  or
 * implied.
 * 
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.apache.system;

import java.io.BufferedReader;
import java.io.InputStream;
import java.io.InputStreamReader;

/**
 * Parses the Windows 2000 environment--the same class should work for other
 * Windows versions, but I only have one to test.
 *
 * @author <a href="mailto:dev@avalon.apache.org">Avalon Development Team</a>
 * @version $Id$
 */
public final class Windows2000 implements CPUParser
{
    private final int m_processors;
    private final String m_cpuInfo;

    public Windows2000()
    {
        int procs = 1;
        String info = "";

        try {
            final Runtime rt = Runtime.getRuntime();
            {
                final Process proc = rt
                        .exec("cmd.exe /C echo %NUMBER_OF_PROCESSORS%");
                final InputStream is = proc.getInputStream();
                BufferedReader reader = null;
                try {
                    reader = new BufferedReader(new InputStreamReader(is));
                    final String numProcs = reader.readLine();
                    if (numProcs != null)
                        procs = Integer.parseInt(numProcs);
                } finally {
                    if (reader != null)
                        reader.close();
                    is.close();
                }
            }
            {
                final Process proc = rt
                        .exec("cmd.exe /C echo %PROCESSOR_IDENTIFIER%");
                final InputStream is = proc.getInputStream();
                BufferedReader reader = null;
                try {
                    reader = new BufferedReader(new InputStreamReader(is));
                    info = reader.readLine();
                } finally {
                    if (reader != null)
                        reader.close();
                    is.close();
                }
            }
        }
        catch( Throwable e )
        {
        }

        m_processors = procs;
        m_cpuInfo = info;
    }

    /**
     * Return the number of processors available on the machine
     */
    final public int numProcessors()
    {
        return m_processors;
    }

    /**
     * Return the cpu info for the processors (assuming symmetric multiprocessing
     * which means that all CPUs are identical).  The format is:
     *
     * ${arch} family ${family} Model ${model} Stepping ${stepping}, ${identifier}
     */
    final public String cpuInfo()
    {
        return m_cpuInfo;
    }

}