THIS IS A TEST INSTANCE. ALL YOUR CHANGES WILL BE LOST!!!!
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After the fields have done their processing, the Form emits a "validateFormvalidate" event. This is a chance to perform cross-form validation that can't be described declaratively.
Note: For compatibility with release 5.1 and earlier, the Form component also emits a "validateForm" event. (See TAP5-760.)
Next, the Form determines if there have been any validation errors. If there have been, then the submission is considered a failure, and a "failure" event is emitted. If there have been no validation errors, then a "success" event is emitted.
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| Code Block | ||||
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public class Login
{
@Persist
@Property
private String userName;
@Property
private String password;
@Inject
private UserAuthenticator authenticator;
@Component@InjectComponent(id = "password")
private PasswordField passwordField;
@Component
private Form form;
/**
* Do the cross-field validation
*/
void onValidateFromLoginFormonValidateFromForm()
{
if (!authenticator.isValid(userName, password))
{
// record an error, and thereby prevent Tapestry from emitting a "success" event
form.recordError(passwordField, "Invalid user name or password.");
}
}
/**
* Validation passed, so we'll go to the "PostLogin" page
*/
Object onSuccess()
{
return "PostLogin";
}
public String getPassword()
{
return password;
}
public void setPassword(String password)
{
password = password;
}
public String getUserName()
{
return userName;
}*/
publicObject void setUserName(String userNameonSuccess()
{
userName = userNamereturn PostLogin.class;
}
}
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| Wiki Markup |
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{info}
Note that the onValidateFromLoginForm() and onSuccess() methods are not public; event handler methods can have any visibility, even private. Package private (that is, no modifier) is the typical use, as it allows the component to be tested, from a test case class in the same package.
{info}
{float} |
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Configuring Fields and Labels
The template for a the Login page contains a minimal amount of Tapestry instrumentation:
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Validator | Constraint Type | Description | Example | ||
– | Ensures that the given input is a valid e-mail address | | |||
max | long | Enforces a maximum integer value | | ||
maxLength | int | Makes sure that a string value has a maximum length | | ||
min | long | Enforces a minimum integer value | | ||
minLength | int | Does nothing (used to override a @Validate annotation) | | ||
none | – | Makes sure that a string value has a minimum length | | ||
<ac:structured-macro ac:name="unmigrated-wiki-markup" ac:schema-version="1" ac:macro-id="3e96bbb34334d01e-084a2d88-415241c6-8759bea6-e8c0377e1f1adff025eb1fe1"><ac:plain-text-body><![CDATA[ | regexp | pattern | Makes sure that a string value conforms to a given pattern | | ]]></ac:plain-text-body></ac:structured-macro> |
required | – | Makes sure that a string value is not null and not the empty string | |
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