Java-Kompendium/kap15/src/main/java/SearchAction.java


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import javafx.collections.ObservableList;
import javafx.event.ActionEvent;
import javafx.event.EventHandler;
import javafx.scene.control.TextField;
import javafx.scene.text.Text;
import java.sql.*;
import javafx.collections.FXCollections;

public class SearchAction implements EventHandler<ActionEvent> {
    private Text status;
    private TextField field;
    private PreparedStatement statement;
    private ObservableList<Mark> marks = FXCollections.observableArrayList();

    public SearchAction(Connection connection, Text status, TextField field) throws SQLException {
        this.statement = connection.prepareStatement(
            "SELECT english, german, math FROM marks WHERE name LIKE ?"
        );
        this.status = status;
        this.field = field;
    }

    public void handle(ActionEvent action) {
        try {
            this.statement.setString(1, this.field.getText());
            this.statement.execute();

            var results = this.statement.getResultSet();

            this.marks.clear();
            if (results.next()) {
                this.marks.add(new Mark("Englisch", results.getInt(1)));
                this.marks.add(new Mark("Deutsch", results.getInt(2)));
                this.marks.add(new Mark("Mathematik", results.getInt(3)));
            }
        } catch (Exception exception) {
            this.status.setText(exception.getMessage());
        }
    }

    public ObservableList<Mark> getMarks() {
        return this.marks;
    }
}