Raible's Wiki: ValidationAndListTapestry

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Implementing validation with Tapestry is quite simple. Rather than using a [TextField|http://jakarta.apache.org/tapestry/doc/ComponentReference/TextField.html] component, you use a [ValidField|http://jakarta.apache.org/tapestry/doc/ComponentReference/ValidField.html] components. The validation integration for the personForm.html page is already done by AppGen in the personForm.page. If you open web/pages/personForm.page, you should see the following XML. I've highlighted the portions that are relevant to validation.

Implementing validation with Tapestry is quite simple. All you need to do is configure a "validators" property on your [TextField|http://jakarta.apache.org/tapestry/doc/ComponentReference/TextField.html] components. The validation integration for the personForm.html page is already done by AppGen in the personForm.page. If you open web/pages/personForm.page, you should see the following XML.

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<pre>

<?xml version="1.0"?>

<!DOCTYPE page-specification PUBLIC

"-//Apache Software Foundation//Tapestry Specification 3.0//EN"

"http://jakarta.apache.org/tapestry/dtd/Tapestry_3_0.dtd">

<page-specification class="org.appfuse.webapp.action.PersonForm">

{{{<?xml version="1.0" encoding="UTF-8"?>

<!DOCTYPE page-specification PUBLIC

"-//Apache Software Foundation//Tapestry Specification 4.0//EN"

"http://jakarta.apache.org/tapestry/dtd/Tapestry_4_0.dtd">

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<set-property name="required" expression="true"/>

<set-property name="clientScriptingEnabled" expression="true"/>

</bean>

<page-specification class="org.appfuse.webapp.action.PersonForm">

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<property-specification name="person" type="org.appfuse.model.Person"/>

<property-specification name="manager" type="org.appfuse.service.Manager">

global.appContext.getBean("manager")

</property-specification>

<property-specification name="message" type="java.lang.String"/>

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<message-binding name="displayName" key="person.firstName"/>

</component>

</component>

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<message-binding name="displayName" key="person.lastName"/>

</component>

</page-specification>

</pre>

</component>

</component>

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</page-specification>}}}

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There are a [number of different validators|http://jakarta.apache.org/tapestry/doc/ComponentReference/ValidField.html] you can use, this example just shows a way to validate Strings are entered. All input fields generated by AppGen are required by default. You can change this by modifying the extras/appgen/src/**/*_page.xdt files.

There are a [number of different validators|http://jakarta.apache.org/tapestry/UsersGuide/validation.html] you can use, this example just shows a way to validate Strings are entered. The userForm.page has examples of an EmailValidator and a PatternValidator. All input fields generated by AppGen are required by default. You can change this by modifying the extras/appgen/src/**/*_page.xdt files.

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if (getValidationDelegate().getHasErrors()) {

if (getDelegate().getHasErrors()) {

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Since validation is configured in the page-specification file (a.k.a. personForm.page), whenever a field uses the ValidField component, it will get validated. For those fields that don't have validation, make sure and use the @Label component for its label. Below is a non-validated field example from web/pages/userForm.html.

Since validation is configured in the page-specification file (a.k.a. personForm.page), whenever a field specifies a "validators" property. For those fields that don't have validation, make sure and use the @Label component for its label. Below is a non-validated field example from web/pages/userForm.html.

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public void testGetPeople() {

List results = mgr.getPeople(new Person());

assertTrue(results.size() > 0);

public void testGetPeople() throws Exception {

List results = new ArrayList();

person = new Person();

results.add(person);

// set expected behavior on dao

personDao.expects(once()).method("getPeople")

.will(returnValue(results));

List people = personManager.getPeople(null);

assertTrue(people.size() == 1);

personDao.verify();

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To begin, create test/web/**/action/PersonListTest.java (extends BasePage implements PageRenderListener) and add two methods. The first, {{pageBeginRender()}} is executed when the page first loads. The second, {{edit()}} is a listener method that's invoked when you click to edit a row. This is pretty much the same as the {{edit()}} method on PersonForm. The one on PersonForm was mainly added for demonstration purposes. AppGen will won't generate an "edit" listener on the form class if you use it to generate your page classes.

To begin, create test/web/**/action/PersonListTest.java and add test methods for editing and searching. The {{edit()}} method is a listener method that's invoked when you click to edit a row. This is pretty much the same as the {{edit()}} method on PersonForm. The one on PersonForm was mainly added for demonstration purposes. AppGen will won't generate an "edit" listener on the form class if you use it to generate your page classes.

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import org.appfuse.model.Person;

import org.apache.tapestry.engine.RequestCycle;

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import org.appfuse.model.Person;

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import java.util.HashMap;

import java.util.Map;

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protected void setUp() throws Exception {

super.setUp();

page = (PersonList) getPage(PersonList.class);

protected void onSetUpBeforeTransaction() throws Exception {

super.onSetUpBeforeTransaction();

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page.setManager((Manager) ctx.getBean("manager"));

page.setRequestCycle(getCycle(request, response));

Map map = new HashMap();

map.put("personManager", (Manager) applicationContext.getBean("personManager"));

page = (PersonList) getPage(PersonList.class, map);

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protected void tearDown() throws Exception {

super.tearDown();

protected void onTearDownAfterTransaction() throws Exception {

super.onTearDownAfterTransaction();

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MockRequestCycle cycle = (MockRequestCycle) page.getRequestCycle();

cycle.addServiceParameter(new Long(1));

RequestCycle cycle = new MockRequestCycle();

cycle.setServiceParameters(new Object[] {new Long("1")});

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PageEvent event = new PageEvent(page, page.getRequestCycle());

page.pageBeginRender(event);

assertTrue(page.getPeople().size() >= 1);

assertTrue(page.getPersons().size() >= 1);

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!!Create PersonController [#6]

Create src/web/**/action/PersonList.java. It should implement [PageRenderListener|http://jakarta.apache.org/tapestry/doc/api/org/apache/tapestry/event/PageRenderListener.html] and read as follows:

!!Create PersonList [#6]

Create src/web/**/action/PersonList.java. It should implement [PageBeginRenderListener|http://jakarta.apache.org/tapestry/tapestry/apidocs/org/apache/tapestry/event/PageBeginRenderListener.html] and read as follows:

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import org.apache.tapestry.event.PageEvent;

import org.apache.tapestry.event.PageRenderListener;

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public abstract class PersonList extends BasePage implements PageRenderListener {

public abstract class PersonList extends BasePage {

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public abstract void setPersonManager(PersonManager manager);

public abstract List getPeople();

public abstract void setPeople(List people);

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public void pageBeginRender(PageEvent event) {

setPeople(getPersonManager().getPeople(null));

public List getPersons() {

return getPersonManager().getPeople();

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Object[] parameters = cycle.getServiceParameters();

Long id = (Long) parameters[0];

Object[] parameters = cycle.getListenerParameters();

Long personId = (Long) parameters[0];

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log.debug("fetching person with id: " + id);

log.debug("fetching person with personId: " + personId);

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Person person = getPersonManager().getPerson(id.toString());

Person person = getPersonManager().getPerson(personId);

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Change it in personList.page too:

{{{<property-specification name="people" type="java.util.List"/>}}}

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You should already have the title and heading keys (personList.title and personList.heading) for the personList.html page in web/WEB-INF/classes/ApplicationResources_en.properties. You should've added these keys in the previous tutorial. The column names automatically resolve to i18n messages based on their identifier (with the . in them).

You should already have the title and heading keys (personList.title and personList.heading) for the personList.html page in web/WEB-INF/classes/ApplicationResources.properties. You should've added these keys in the previous tutorial. The column names automatically resolve to i18n messages based on their identifier (with the . in them).

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In the last tutorial, the Canoo tests verify that the user sees the Main Menu after saving/editing a user. Since you've changed that logic, and now you're activating the PersonList, you need to update the tests. Open test/web/web-tests.xml and change any "mainMenu" references in the "PersonsTests" to be go to the people list.

In the last tutorial, the Canoo tests verify that the user sees the Main Menu after saving/editing a person. Since you've changed that logic, and now you're activating the PersonList, you need to update the tests. Open test/web/web-tests.xml and change any "mainMenu" references in the "PersonsTests" to be go to the people list.

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{{{<verifytitle description="display Main Menu" text=".*${mainMenu.title}.*" regex="true"/>}}}

{{{<verifyTitle description="display Main Menu" text=".*${mainMenu.title}.*" regex="true"/>}}}

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{{{<verifytitle description="we should see the personDetail title" text=".*${personDetail.title}.*" regex="true"/>}}}

{{{{{{<verifyTitle description="Person List appears if save successful" text=".*${personList.title}.*" regex="true"/>}}}}}}

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Where ''menu.viewPeople'' is an entry in web/WEB-INF/classes/ApplicationResources_en.properties.

Where ''menu.viewPeople'' is an entry in web/WEB-INF/classes/ApplicationResources.properties.

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Notice that there is a new link on the left side (from mainMenu.jsp) and on the right in our menu (from menu.jsp).

Notice that there is a new link on the left side (from mainMenu.html) and on the right in our menu (from menu.jsp).

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