Velocity - Basic

Motivation

• Argue why Velocity may be an attractive alternative to JSP.
• Describe what is MVC pattern.
• Identify what exactly is Model, View and Controller in the Velocity.

Engine and context

• Provide basic information concerning Velocity engine, Velocity templates classes and Velocity Context.
• Please note that detailed information regarding the issues mentioned above aren't in the scope of this exam.

Comments and literals

• Show examples of both type of comments.
• Understand what and how can be escaped in the Velocity template.
• Describe how to deal with the whitespaces in the templates.

References Arithmetic, relations and logic

• Know the arithmetical, relational and logical operators available in the Velocity.
• Demonstrate how to use them.
• Understand how Velocity evaluates Java expressions returning null.

Directives

• Identify the formal notation of the directives.
• Demonstrate how to use the following directives:
  • if
  • else
  • end
  • elseif
  • foreach
  • include
  • parse
  • stop
  • evaluate
  • literal
• Describe how to access foreach loop counter.

Velocimacros

• Demonstrate how to create a macro.
• Show how to pass arguments (variable, properties, methods) to the macro.
• Understand limits of the velocimacros.
• Create your own macro library.
• Know that you cannot 'include' the macro library.