//Element.java//  //This library is free software; you can redistribute it and/or//modify it under the terms of the GNU Lesser General Public//License as published by the Free Software Foundation; either//version 2.1 of the License, or (at your option) any later version.//  //This library 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//Lesser General Public License for more details.package rtree;//package rtree;import java.io.*;/**baap of all elemetns  @author Prachuryya Barua *  **/public abstract class Element implements Cloneable, java.io.Serializable{  Rect Rectangle;    Element(){};  public Element( Rect Rectangle)  {    this.Rectangle = Rectangle;  }  private void overwriteRect( Rect Rectangle)  {    this.Rectangle = Rectangle;  }  public  Rect getRect()  {    return(Rectangle);  }  /**     This can be a child node pointer or a record pointer.  */  //public abstract Object getPtr();//old  public abstract long getPtr();  /**     Do not call this function, Node will call it.  */  void setRect( Rect mbr)    throws IllegalValueException  {    if(mbr == null)      throw new IllegalValueException("Element.adjustMBR: Rect is null");    overwriteRect(mbr);  }  //abstract void setPtr(Object ptr) //old  //throws IllegalValueException;  public abstract void setPtr(long ptr);  public abstract int getElementType();   public String toString()  {    return Rectangle.toString();  }}