Swing Hacks

Search Through JTables Easily #26

Chapter 3, Tables and Trees

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137

HACK

Recreating the inner table model links. Start by clearing the row-to-model

index to get rid of the previous results:

rowToModelIndex.clear( );

The

Hits

object contains a number of

Documents

, just like the ones you put

into the index. Remember, you put a field in each

Document

with the name

ROW_NUMBER. So, now you can iterate through the Documents and get the row

number from the field value:

for (int t=0; t<hits.length( ); t++){

Document document = hits.doc(t);

Field field = document.getField(ROW_NUMBER);

Integer rowNumber = new Integer(field.stringValue( ));

}

The last step is to add an Integer to the row-to-model index with the row

number retrieved from the document. Then, tie up all the loose ends by fir-

ing a table model update.

Try It Out

Because you’re creating this table model as a decorator, it’s extremely easy

to use. The normal code to set up a

JTable and a custom table model

MyTableModel looks like this:

JTable table = new JTable( );

MyTableModel myTableModel = new MyTableModel( );

table.setTableModel(myTableModel);

All you need to do is wrap the MyTableModel with a TableSearcher and set the

table model for the

JTable as the TableSearcher:

JTable table = new JTable( );

MyTableModel myTableModel = new MyTableModel( );

TableSearcher tableSearcher = new TableSearcher(myTableModel);

table.setTableModel(tableSearcher);

Then, you just need to call the search method at the appropriate time. Usu-

ally, you’ll have a search field to enter the search and a search button to start

the search, so just attach an action listener to them both to fire off a search:

final JTextField searchField = new JTextField( );

JButton searchButton = new JButton("Go");

ActionListener searchListener = new ActionListener( ) {

public void actionPerformed(ActionEvent e) {

searchTableModel.search(searchField.getText().trim().toLowerCase( ));

searchField.requestFocus( );

}

};