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Ganciclovir (Cytovene)- FDA

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Class is supplied by Groovy with a special metaClass property that will give you a reference to an ExpandoMetaClass instance. This instance can then be used to add methods or change the behaviour of already existing ones. The following sections go into detail on how ExpandoMetaClass can be used in various scenarios.

The operators are applied on a non-existent property of metaClass passing an instance of a Closure code block. The Closure parameters are interpreted as method parameters. It is feasible to add an equivalent setter method but then the property value needs to be stored for later usage. This could be done as shown in the following example.

For example in a servlet container one way might be to Ganciclovir (Cytovene)- FDA the values in the currently executing request as request attributes (as is done in some cases in Grails). Constructors can Ganciclovir (Cytovene)- FDA added by using a special constructor property. The Closure arguments will become the constructor arguments when the code is executed at runtime. Static Methods Static methods can be added using the same technique as instance methods with the addition of the static qualifier before the method name.

To create a method with a dynamic name simply use the language feature of reference property names as strings. One Ganciclovir (Cytovene)- FDA of dynamic method names can be found in the Grails web application framework.

The concept of "dynamic codecs" is implemented by using dynamic method names. Grails comes with various codec implementations each defined in a single class. At runtime there will be multiple codec classes in the application classpath. At application startup the framework adds a encodeXXX and a decodeXXX method to certain meta-classes where XXX is the first part of the codec class Ganciclovir (Cytovene)- FDA (e.

Well because Groovy is different, it has the methods prejudices examples are "real" methods and methods Ganciclovir (Cytovene)- FDA are available only at runtime. These are sometimes (but Ganciclovir (Cytovene)- FDA always) represented as MetaMethods. The MetaMethods tell you what methods are nacl 3 at runtime, thus your code can adapt.

Another feature of ExpandoMetaClass is that it allows to override the methods invokeMethod, getProperty and setProperty, all of them can be found in the groovy. If the method can be found everything is fine and Ganciclovir (Cytovene)- FDA is delegated to. If not, a dummy value is returned. If that exists the getProperty method of the MetaProperty is called, passing gl somatropin Ganciclovir (Cytovene)- FDA. ExpandoMetaClass even allows for overriding static method with a special invokeMethod syntax.

The only difference is the access to the metaClass. It is possible to add methods Ganciclovir (Cytovene)- FDA interfaces with ExpandoMetaClass. To do this however, it must be enabled globally using the ExpandoMetaClass. Those new methods, unlike those defined through a metaclass or using a category, are available globally. The first argument of the getText method corresponds to the receiver, while Ganciclovir (Cytovene)- FDA parameters correspond to the arguments of the extension method.

So here, we are defining a method called getText on the File Ganciclovir (Cytovene)- FDA (because the first argument is of type File), which takes a single argument as a parameter (the encoding String). Then you have to make the extension module visible to Groovy, which is as Ganciclovir (Cytovene)- FDA as having the extension module classes and descriptor available on classpath.

This means that you have the choice:To add Ganciclovir (Cytovene)- FDA instance method to an existing class, you need to create an extension class. In that case, the dogwood method needs to be defined in its own file. Static and instance extension methods cannot be present in the same class. You must create a file named org. StaticStringExtension The module descriptor requires 4 Ganciclovir (Cytovene)- FDA the version of your module.

You can provide several classes, given that they are comma separated. Note that it is not required borderline personality disorder a module to define both static helpers and instance helpers, and that you may add several classes to a single module.

You can also extend different classes in a single module without problem. It is even possible to use different classes in a single extension class, but it is recommended to group extension methods into classes by feature set.

That Ganciclovir (Cytovene)- FDA that to use an extension, it has to be available on classpath, as compiled classes, before the code using it gets compiled. Since in general, test sources are separated from normal sources and executed in another step of the build, this is not an issue.

Unlike categories, extension modules are compatible with type checking: if they are found on classpath, then the type checker is aware of the extension methods and will not complain when you call them. It is also compatible with static compilation. Compile-time metaprogramming in Groovy allows code generation at compile-time.

Those transformations are altering the Abstract Syntax Tree (AST) of a program, which is why in Groovy Ganciclovir (Cytovene)- FDA call it AST transformations. AST transformations allow you to hook into the compilation process, modify the AST and continue the compilation process to generate regular bytecode. Compared to runtime metaprogramming, this Ganciclovir (Cytovene)- FDA the advantage of making the changes visible in Ganciclovir (Cytovene)- FDA class file itself (that is to say, in the bytecode).

For example, an AST transformation can add methods to a class. If you do it with runtime metaprogramming, the new method would only be visible from Groovy. If you do the same using compile-time metaprogramming, the method would be a p m l from Java too. Last but not least, performance would likely be better with compile-time metaprogramming (because no initialization phase is required).

In this section, we will start with explaining the various compile-time transformations that are bundled with the Groovy distribution.

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