Blog teach you : how to enhance http request object by adding helper methods using groovy meta programming. The blog contains most commonly methods to request object such as isAjax, siteUrl, isMobileBrowser, remoteIPAddress etc. Once they are injected from Bootstrap.groovy init closure, the new methods are available in controllers and filters. Blog shows some use cases where these helper methods has been used successfully.
Hi, Groovy took another leap ahead in the methodology of defining Strings by providing us with “dollar-slashy” strings which further minimized the need of escaping any special character as compared to simple “slashy” Strings. In the Groovy ver:1.8+ you can define Strings as follows: [java] //A dollar-slashy string String message = $/Hi! I […]
Hi, Sometimes we need to set the context for the GDSL contributor to all the possible files and scripts in the project scope. This is a rare case scenario, but could be handy on some implementations. This can be done by two techniques: Ignoring all filters passed to the “context” method. Setting the “ctype” […]
One of the disadvantage of using meta-programming and DSL is that we don’t get auto-completes in Our IDE. Hence IntelliJ provided us with an awesome and intelligent toolkit to handle dynamic properties and methods when writing code in groovy. In IntelliJ IDEA we can write GDSL Files in order to give us the auto-completes(code Completion) […]
We can define dynamic properties in a class as follows: Suppose we have injected a property named “UTCTimeInMills” in Date class which is of type “long”. Now we need to enable syntax hinting for it, We can do it as follows: (See inline comments for description) [java] //First we need to define a context […]
We can define dynamic methods in a class as follows: Suppose we have injected a method name .clone([boolean] clearTime) in Date which clones the date object and returns the cloned one. This method takes an boolean argument argument too. We can do it as follows: (See inline comments for description) [java] //First we need […]
GDSL Scripts are based on two main concepts: contexts and contributors. Hence we will discuss about these in detail here. In GroovyDSL context is an entity which is supposed to give an answer to the question “Where?” this behavior will be available. Contexts are first-order citizens in GroovyDSL, so they may be stored in […]
hi, Suppose we have used method missing in our code and we want to give syntax-hinting for these methods then we can go as follows: Suppose we have this class which implements method missing: [java] class Pixel { def Top def Left def Color def methodMissing(String name, args) { // implementation of dynamic […]
hi, Very often we use delegates in our closure calls. It would be great if we could get code-hinting in the closure via the delegates. Now let us take a very simple scenario, where we made a method “with” which delegates the delegate objet to closure and runs it. [java] class Delegator { […]