TermListModel.java

/* 
** Author(s): Miguel Calejo
** Contact:   interprolog@declarativa.com, http://www.declarativa.com
** Copyright (C) Declarativa, Portugal, 2000-2002
** Use and distribution, without any warranties, under the terms of the 
** GNU Library General Public License, readable in http://www.fsf.org/copyleft/lgpl.html
*/
package com.declarativa.interprolog.gui;
import com.declarativa.interprolog.*;
import javax.swing.*;
import javax.swing.event.*;
import java.io.Serializable;


public class TermListModel implements Serializable,ListModel{
        TermModel[] terms;
        
        public static ObjectExamplePair example(){
                TermModel[] Atuples = new TermModel[1];
                Atuples[0]=new TermModel("c");
                return new ObjectExamplePair("TermListModel",
                        new TermListModel(Atuples),
                        new TermListModel(new TermModel[0])
                        );
        }
        
        public void addListDataListener(ListDataListener l) {
                //System.out.println("Should add a ListDataListener...");
        }
        public void removeListDataListener(ListDataListener l) {
                //System.out.println("Should remove a ListDataListener...");
        }
        public Object getElementAt(int index) {
                return terms[index];
        }
        public int getSize() {
                return terms.length;
        }
        public TermListModel(TermModel[] terms){
                if (terms == null) 
                        throw new RuntimeException("The TermListModel constructor needs a non-null argument");
                for (int t=0; t<terms.length; t++) {
                        if (terms[t]==null)
                                throw new RuntimeException("Null term in TermListModel term "+t);
                }
                this.terms=terms;
        }
}

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