Package org.jmule.core.utils

Source Code of org.jmule.core.utils.Misc

/*
*  JMule - Java file sharing client
*  Copyright (C) 2007-2008 JMule team ( jmule@jmule.org / http://jmule.org )
*
*  Any parts of this program derived from other projects, or contributed
*  by third-party developers are copyrighted by their respective authors.
*
*  This program is free software; you can redistribute it and/or
*  modify it under the terms of the GNU General Public License
*  as published by the Free Software Foundation; either version 2
*  of the License, or (at your option) any later version.
*
*  This program is distributed in the hope that it will be useful,
*  but WITHOUT ANY WARRANTY; without even the implied warranty of
*  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
*  GNU General Public License for more details.
*
*  You should have received a copy of the GNU General Public License
*  along with this program; if not, write to the Free Software
*  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
*
*/
package org.jmule.core.utils;

import static org.jmule.core.edonkey.E2DKConstants.PARTSIZE;

import java.io.ByteArrayOutputStream;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.OutputStreamWriter;
import java.io.PrintWriter;
import java.lang.reflect.Method;
import java.nio.ByteBuffer;
import java.nio.ByteOrder;
import java.nio.channels.FileChannel;

import javax.management.JMException;

import org.jmule.core.edonkey.packet.tag.NumberTag;
import org.jmule.core.edonkey.packet.tag.Tag;

/**
*
* @author binary256
* @version $$Revision: 1.6 $$
* Last changed by $$Author: javajox $$ on $$Date: 2010/01/05 14:34:21 $$
*/
public class Misc {
 
  public static final int    INFINITY_AS_INT = 31536000;
 
  public static String getStackTrace(Throwable e) {
    try {
      ByteArrayOutputStream baos = new ByteArrayOutputStream();

      PrintWriter pw = new PrintWriter(new OutputStreamWriter(baos));

      e.printStackTrace(pw);

      pw.close();

      return baos.toString();

    } catch (Throwable ignore) {
      return "";
    }
  }
 
  public static int compareAllObjects(Object object1, Object object2,String methodName,boolean order) {

    Class cl = object1.getClass();
    Object result1 = null, result2 = null;
    try {
      Method m = cl.getMethod(methodName, null);
      result1 = m.invoke(object1, null);
      result2 = m.invoke(object2, null);
     
      if (result1 instanceof String) {
       
        String name1 = (String)result1;
        String name2 = (String)result2;
        int result = name1.compareTo(name2);
        if (order)
          return result;
        else
          return reverse(result);
      }
     
      if (result1 instanceof Integer) {
        int int1 = (Integer)result1;
        int int2 = (Integer)result2;
        int result = 0;
        if (int1>int2) result = 1;
        if (int1<int2) result = -1;
        if (order)
          return result;
        else
          return reverse(result);
      }
     
      if (result1 instanceof Long) {
        long int1 = (Long)result1;
        long int2 = (Long)result2;
        int result = 0;
        if (int1>int2) result = 1;
        if (int1<int2) result = -1;
        if (order)
          return result;
        else
          return reverse(result);
      }
     
      if (result1 instanceof Float) {
        float int1 = (Float)result1;
        float int2 = (Float)result2;
        int result = 0;
        if (int1>int2) result = 1;
        if (int1<int2) result = -1;
        if (order)
          return result;
        else
          return reverse(result);
      }
     
      if (result1 instanceof Double) {
        double int1 = (Double)result1;
        double int2 = (Double)result2;
        int result = 0;
        if (int1>int2) result = 1;
        if (int1<int2) result = -1;
        if (order)
          return result;
        else
          return reverse(result);
      }

      if (result1 instanceof Boolean) {
        boolean b1 = (Boolean)result1;
        boolean b2 = (Boolean)result2;
        int result = 0;
        if ((b1==true)&&(b2==false)) result = 1;
        if ((b1==false)&&(b2==true)) result = -1;
       
        if (order)
          return result;
        else
          return reverse(result);
      }
       
      String name1 = result1 + "";
      String name2 = result2 + "";
      int result = name1.compareTo(name2);
      if (order)
        return result;
      else
        return reverse(result);
     
    } catch (Throwable e) {
      e.printStackTrace();
    }
   
    return 0;
  }
 
  public static final String NO_EXTENSION = "no extension";
 
  public static String getFileExtension(String fileName) {
    int id = fileName.length()-1;
    while(id>0) {
      if (fileName.charAt(id)=='.') break;
      id--;
    }
    String extension = NO_EXTENSION;
    if (id!=0)
      extension = fileName.substring(id+1, fileName.length());
 
    return extension;
  }
 
  public static int reverse(int value) {
    if (value<0) return 1;
    if (value>0) return -1;
    return 0;
  }
 
  public static ByteBuffer getByteBuffer(long bufferSize) {
    ByteBuffer data = ByteBuffer.allocate(8);
    data.order(ByteOrder.LITTLE_ENDIAN);
    data.putLong(bufferSize);
    return ByteBuffer.allocate(data.getInt(0)).order(
        ByteOrder.LITTLE_ENDIAN);
  }

  public static long extractNumberTag(Tag tag) throws JMException {
    if (tag instanceof NumberTag) {
      NumberTag ntag = (NumberTag) tag;
      return ntag.getNumber();
    }
    throw new JMException("Tag is not number tag\n"+tag);
  }
 
  /**
   *
   * @param source
   * @param destination
   * @throws Exception
   * @deprecated
   */
  public static void copyFile(String source, String destination) throws Exception {
        FileChannel srcChannel = new FileInputStream(source).getChannel();
   
        FileChannel dstChannel = new FileOutputStream(destination).getChannel();
   
        dstChannel.transferFrom(srcChannel, 0, srcChannel.size());
   
        srcChannel.close();
        dstChannel.close();
  }
 
  public static int getPartCount(long fileSize) {
   
    if (fileSize<PARTSIZE) return 0;
   
    int partCount = (int)(fileSize/PARTSIZE);
    if (fileSize%PARTSIZE !=0) partCount++;
    return partCount;
  }
 
  public static byte getByte(int num,int pos) {
    ByteBuffer data = Misc.getByteBuffer(4);
    data.putInt(0, num);
    return data.get(pos);
  }
 
  public static boolean isHexadecimalNumber(String number) {
    if(number.length() == 0) return false;
    if(number.length() % 2 != 0) return false;
    for(Character current_char : number.toCharArray()) {
      char char_to_test = current_char.toUpperCase(current_char);
      if ( '0' <= char_to_test && char_to_test <= '9' )
        continue;
      if ( 'A' <= char_to_test && char_to_test <= 'F' )
        continue;
      return false;
    }
    return true;
  }
 
  public static void w(String string) {
    System.out.println( string );
  }
 
  public static void wl(String string) {
    System.out.print( string );
  }
}
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