import javax.swing.JTextField;
import javax.swing.RowFilter;
import javax.swing.event.DocumentEvent;
import javax.swing.event.DocumentListener;
import javax.swing.table.TableModel;
import javax.swing.table.TableRowSorter;

public class TableSearchDocumentListener implements DocumentListener {

    private final JTextField searchTextField;
    private final TableRowSorter tableRowSorter;

    public TableSearchDocumentListener(JTextField searchTextField, TableRowSorter tableRowSorter) {
        this.searchTextField = searchTextField;
        this.tableRowSorter = tableRowSorter;
    }

    @Override
    public void insertUpdate(DocumentEvent e) {
        updateTableRowSorter();
    }

    @Override
    public void removeUpdate(DocumentEvent e) {
        updateTableRowSorter();
    }

    @Override
    public void changedUpdate(DocumentEvent e) {
        updateTableRowSorter();
    }

    private void updateTableRowSorter() {
        String searchFieldText = searchTextField.getText();

        if (searchFieldText != null) {
            String[] keywords = searchFieldText.split(" ");
            tableRowSorter.setRowFilter(new KeywordFilter(keywords));
        }
    }

    public class KeywordFilter extends RowFilter<TableModel, Integer> {

        private final String[] keywords;

        // Constructor for filtering a single keyword
        public KeywordFilter(String keyword) {
            this.keywords = new String[1];
            this.keywords[0] = keyword.toLowerCase();
        }

        // Constructor for filtering an array of keywords
        // Only the rows that contain every keyword are displayed
        public KeywordFilter(String[] keywords) {
            this.keywords = keywords;
            // convert all keywords to lower case
            for (int i = 0; i < keywords.length; i++) {
                keywords[i] = keywords[i].toLowerCase();
            }
        }

        @Override
        public boolean include(RowFilter.Entry entry) {
            // Does the row contain all keywords? Assume true and set to false if
            // one is missing
            boolean containsAll = true;
            for (int i = 0; containsAll == true && i < keywords.length; i++) {
                // Is the keyword contained in one of the columns? Assume false and
                // set to true if it is found
                boolean containsThis = false;
                for (int j = 0; containsThis == false && j < entry.getValueCount(); j++) {
                    if (entry.getStringValue(j).toLowerCase().contains(keywords[i])) {
                        containsThis = true;
                    }
                }
                if (!containsThis) {
                    containsAll = false;
                }
            }

            return containsAll;
        }

    }

}