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This is
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| a cheat sheet brief guide for learning Tapestry, designed for those who already know JavaServer Faces (JSF) |
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Faces templates and Tapestry templates are superficially quite similar.
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| xml |
title |
JSF template (helloworld.xhtml) |
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<html xmlns="http://www.w3.org/1999/xhtml"
xmlns:h="http://java.sun.com/jsf/html">
<h:body>
<p><h:outputText value="#{helloWorldBean.greeting} /></p>
</h:body>
</html>
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| xml |
title |
Tapestry template (HelloWorld.tml) |
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<html>
<body>
<p>${greeting}</p>
</body>
</html>
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- The #{...} syntax in JSF does not encode the underlying string, so you have to use the <h:outputText> tag if your data may contain HTML reserved characters such as <, >, or &. In contrast, the ${...} syntax in Tapestry does encode the underlying string.
- In JSF, backing beans are not necessarily related one-to-one with page templates. Often several templates use the same backing bean, and one template may reference multiple backing beans. In Tapestry, they are always related one-to-one, and therefore you don't have to specify which component class your ${...} expressions are referencing.
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| java |
title |
JSF Backing Bean (HelloWorldBean.java) |
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@ManagedBean
@RequestScoped
public class HelloWorldBean {
public String getGreeting() {
return "Hello, World!";
}
}
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| java |
title |
Tapestry page class (HelloWorld.java) |
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public class HelloWorld {
public String getGreeting() {
return "Hello, World!";
}
}
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Tapestry applications can use JSR 303 Bean Validation annotations that JSF users should be familiar with:
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public class Employee {
@Validate("required,minlength=2,maxlength=100")
private String lastName;
@NotNull @Email private String email;
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Tapestry for JSF Users 