blob: 3ff1c2df40249aa6835f9b2a39b0c369b9066e4e (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
|
package com.vaadin.tests.minitutorials.v70;
import com.vaadin.data.validator.AbstractValidator;
import com.vaadin.data.validator.EmailValidator;
import com.vaadin.navigator.View;
import com.vaadin.navigator.ViewChangeListener.ViewChangeEvent;
import com.vaadin.shared.ui.MarginInfo;
import com.vaadin.ui.Alignment;
import com.vaadin.ui.Button;
import com.vaadin.ui.Button.ClickEvent;
import com.vaadin.ui.CustomComponent;
import com.vaadin.ui.PasswordField;
import com.vaadin.ui.TextField;
import com.vaadin.ui.VerticalLayout;
import com.vaadin.ui.themes.Reindeer;
public class SimpleLoginView extends CustomComponent implements View,
Button.ClickListener {
public static final String NAME = "login";
private final TextField user;
private final PasswordField password;
private final Button loginButton;
public SimpleLoginView() {
setSizeFull();
// Create the user input field
user = new TextField("User:");
user.setWidth("300px");
user.setRequired(true);
user.setInputPrompt("Your username (eg. joe@email.com)");
user.addValidator(new EmailValidator(
"Username must be an email address"));
user.setInvalidAllowed(false);
// Create the password input field
password = new PasswordField("Password:");
password.setWidth("300px");
password.addValidator(new PasswordValidator());
password.setRequired(true);
password.setValue("");
password.setNullRepresentation("");
// Create login button
loginButton = new Button("Login", this);
// Add both to a panel
VerticalLayout fields = new VerticalLayout(user, password, loginButton);
fields.setCaption("Please login to access the application. (test@test.com/passw0rd)");
fields.setSpacing(true);
fields.setMargin(new MarginInfo(true, true, true, false));
fields.setSizeUndefined();
// The view root layout
VerticalLayout viewLayout = new VerticalLayout(fields);
viewLayout.setSizeFull();
viewLayout.setComponentAlignment(fields, Alignment.MIDDLE_CENTER);
viewLayout.setStyleName(Reindeer.LAYOUT_BLUE);
setCompositionRoot(viewLayout);
}
@Override
public void enter(ViewChangeEvent event) {
// focus the username field when user arrives to the login view
user.focus();
}
/*
* Validator for validating the passwords
*/
private static final class PasswordValidator extends
AbstractValidator<String> {
public PasswordValidator() {
super("The password provided is not valid");
}
@Override
protected boolean isValidValue(String value) {
/*
* Password must be at least 8 characters long and contain at least
* one number
*/
if (value != null
&& (value.length() < 8 || !value.matches(".*\\d.*"))) {
return false;
}
return true;
}
@Override
public Class<String> getType() {
return String.class;
}
}
@Override
public void buttonClick(ClickEvent event) {
/*
* Validate the fields using the navigator. By using validors for the
* fields we reduce the amount of queries we have to use to the database
* for wrongly entered passwords
*/
if (!user.isValid() || !password.isValid()) {
return;
}
String username = user.getValue();
String password = this.password.getValue();
/*
* Validate username and password with database here. For examples sake
* I use a dummy username and password.
*/
boolean isValid = username.equals("test@test.com")
&& password.equals("passw0rd");
if (isValid) {
// Store the current user in the service session
getSession().setAttribute("user", username);
// Navigate to main view
getUI().getNavigator().navigateTo(SimpleLoginMainView.NAME);
} else {
// Wrong password clear the password field and refocuses it
this.password.setValue(null);
this.password.focus();
}
}
}
|
