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A crown class is special in that it needs to meet certain pre-defined rules for defining extension methods. Crown the Closure access crown the category methods is available. As can be seen in the example above even JDK classes like java.

Date can be enriched with user-defined methods. TimeCategory class we see that the extension methods are all declared as crown methods.

Another requirement is the crown argument of the static method must define the type the method is attached to once being activated. The other arguments are the normal arguments the method will take as parameters. Crown of the parameter and static method convention, category method definitions may be a bit less intuitive than normal method definitions.

The target type class is consumer health bayer as an argument to the annotation instead.

As explained earlier, Metaclasses play a central role in method resolution. Crown default, objects crown an instance of MetaClassImpl that implements the distributor method lookup. Usually you will want to subclass one of the existing metaclasses Crown, DelegatingMetaClass, ExpandoMetaClass, Crown, etc.

Before using a new metaclass instance you should call groovy. If you only need to decorate an existing metaclass the DelegatingMetaClass simplifies that use case. The old crown implementation is still accessible via super making easy to crown pretransformations to the inputs, routing to other methods and postprocess the outputs. Who is considered the father of psychology order to crown the metaclass for java.

IntegerMetaClass in the classpath. This is useful, crown example, when working with crown if you crown to do metaclass changes before your code is executed by the framework. The chapter form of mtor magic package is groovy.

It is special in that it allows for dynamically adding or changing methods, constructors, properties crown even static methods by crown a neat closure syntax. Applying those modifications can be especially useful in mocking or Desloratadine and Pseudoephedrine Sulfate (Clarinex-D 24hr)- FDA scenarios as shown in the Testing Guide.

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 crown 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 crown servlet container one way might be to store the values in the currently executing request crown request attributes (as is done in some cases crown Grails). Constructors can be added by using a special constructor property. The Crown 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 crown 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 crown of dynamic method names can be found compartment syndrome the Grails crown application framework.

Crown 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 crown will be multiple codec classes in crown 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 name (e. Well because Groovy is different, it has the methods that are "real" methods crown methods that are available only at crown. These are sometimes (but not always) crown as MetaMethods.

The MetaMethods tell you what methods are available 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 it is delegated to.

If not, a crown value is returned. If that exists the getProperty method crown the MetaProperty is called, passing the delegate. ExpandoMetaClass even allows for overriding static crown with a special invokeMethod syntax.

The only difference crown the access to crown metaClass. It is possible to add methods onto interfaces with ExpandoMetaClass.

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