MatchFrame.java

package org.prevayler.demos.demo2.gui;
import java.awt.*;
import java.awt.event.*;
import java.util.*;
import javax.swing.*;
import javax.swing.table.*;
import net.sourceforge.javamatch.engine.*;
import net.sourceforge.javamatch.query.*;
import org.prevayler.Prevayler;
import org.prevayler.demos.demo2.business.*;

/** 
 * Class MatchFrame shows the results of matching the data in the bank demo 
 * application
 * @see http://javamatch.sourceforge.net/integration.html#prevayler
 * @author Walter van Iterson
 * @author Jacob Kjome
 */
class MatchFrame extends JInternalFrame {
  private static final long serialVersionUID=2988308712345594693L;
  private Prevayler prevayler;
  private JButton refreshButton;
  private JTable matchTable;
  private DefaultTableModel matchTableModel;
  /** 
 * Creates a new MatchFrame, that uses the given Prevayler persistent storage
 * mechanism, and puts itself in the given parent container.
 */
  MatchFrame(  Prevayler prevayler){
    super("Interesting accounts");
    this.prevayler=prevayler;
    initUI();
    refreshTable();
    setVisible(true);
  }
  /** 
 * Initializes the user interface
 */
  private void initUI(){
    setBounds(100,70,400,250);
    getContentPane().setLayout(new BorderLayout(0,0));
    JPanel buttonPanel=new JPanel();
    buttonPanel.setLayout(new FlowLayout(FlowLayout.RIGHT,0,0));
    refreshButton=new JButton("Refresh");
    refreshButton.addActionListener(new ActionListener(){
      public void actionPerformed(      ActionEvent event){
        refreshTable();
      }
    }
);
    buttonPanel.add(refreshButton);
    getContentPane().add(buttonPanel,BorderLayout.SOUTH);
    matchTableModel=new DefaultTableModel();
    matchTableModel.setColumnIdentifiers(new String[]{"Match","Account","Balance","#Entries"});
    matchTable=new JTable(matchTableModel);
    getContentPane().add(new JScrollPane(matchTable),BorderLayout.CENTER);
  }
  /** 
 * Refreshes the table that shows the top-10 matching results
 */
  private void refreshTable(){
    matchTableModel.setRowCount(0);
    Bank bank=(Bank)prevayler.prevalentSystem();
    java.util.List accounts=bank.accounts();
    try {
      MatchEngine matchEngine=new MatchEngine();
      QuerySet query=new QuerySet();
      query.addPreferred(new Maximum("balance()"));
      query.addPreferred(new Maximum("transactionHistory().size()"));
      MatchResult matchResult=matchEngine.executeQuery(query,accounts);
      for (Iterator resultIterator=matchResult.getResultIterator(); resultIterator.hasNext(); ) {
        ResultItem curResultItem=(ResultItem)resultIterator.next();
        Account matchedAccount=(Account)curResultItem.getMatchedObject();
        Object[] rowData=new Object[4];
        rowData[0]=new Float(curResultItem.getMatchValue());
        rowData[1]=matchedAccount;
        rowData[2]=new Long(matchedAccount.balance());
        rowData[3]=new Integer(matchedAccount.transactionHistory().size());
        matchTableModel.addRow(rowData);
      }
    }
 catch (    MatchException me) {
      System.out.println(me);
    }
  }
}