// Selection  (Model of a filtered list of students)
// Modified: Carsten Schuermann
// Date: Sat Mar 25 22:02:34 2006

import java.util.ArrayList;
import java.util.Iterator;
import javax.swing.AbstractListModel;


class Selection extends AbstractListModel {
    // Model of a selection
    private final OOPStudent[] rawData;
    private ArrayList<OOPStudent> filteredData = new ArrayList<OOPStudent>();
    private String filter;
    private OOPStudent selectedStudent;

    public void setSelected (OOPStudent student) {
	selectedStudent = student;
    }
    
    public OOPStudent getSelected () {
	return selectedStudent;
    }

    Selection(OOPStudent[] raw){
	rawData = raw;
	updateFilter("");
    }
    
    private boolean checkAgainstFilter(Object o){
	String data = o.toString().toLowerCase();
	String filter = this.filter.toLowerCase();
	return data.indexOf(filter) >=0;
    }
    
    void updateFilter(String newFilter){
	filter = newFilter;
	
	    filteredData.clear();
	    for (int i = 0; i<rawData.length; i++)
		if ( checkAgainstFilter( rawData[i] ) ){
		    filteredData.add(rawData[i]);
		}
	    
	    this.fireContentsChanged( this, 0, filteredData.size() );
    }
    
    public int getSize(){
	return filteredData.size();
    }
    
    public OOPStudent getElementAt(int index){
	return filteredData.get(index);
    }
}