Package org.codehaus.groovy.transform.trait

# Class TraitASTTransformation

java.lang.Object
org.codehaus.groovy.transform.AbstractASTTransformation
org.codehaus.groovy.transform.trait.TraitASTTransformation

All Implemented Interfaces:
  `CompilationUnitAware`, `ASTTransformation`, `ErrorCollecting`

public class TraitASTTransformation extends AbstractASTTransformation implements CompilationUnitAware
Handles generation of code for the traits (trait keyword is equivalent to using the @Trait annotation). A class annotated with @Trait will generate, instead:

- an interface with the same name
- a utility inner class that will be used by the compiler to implement the trait
- potentially a utility inner class to assist with implementing trait fields

- ## Field Summary

  Fields
  Modifier and Type
  Field
  Description
  `static final String`
  `DO_DYNAMIC`
  `static final String`
  `POST_TYPECHECKING_REPLACEMENT`

  ### Fields inherited from class org.codehaus.groovy.transform.AbstractASTTransformation

  `RETENTION_CLASSNODE, sourceUnit`

- ## Constructor Summary

  Constructors
  Constructor
  Description
  `TraitASTTransformation()`

- ## Method Summary

  Modifier and Type
  Method
  Description
  `void`
  `setCompilationUnit(CompilationUnit unit)`
  `void`
  `visit(ASTNode[] nodes, SourceUnit source)`
  The method is invoked when an AST Transformation is active.

  ### Methods inherited from class org.codehaus.groovy.transform.AbstractASTTransformation

  `addError, checkIncludeExcludeUndefinedAware, checkIncludeExcludeUndefinedAware, checkNotInterface, checkPropertyList, checkPropertyList, checkPropertyList, copyAnnotatedNodeAnnotations, copyAnnotatedNodeAnnotations, deemedInternalName, getAnnotationName, getMemberClassList, getMemberClassValue, getMemberClassValue, getMemberIntValue, getMemberStringList, getMemberStringValue, getMemberStringValue, getMemberValue, hasAnnotation, init, memberHasValue, shouldSkip, shouldSkip, shouldSkipOnDescriptorUndefinedAware, shouldSkipUndefinedAware, shouldSkipUndefinedAware, tokenize`

  ### Methods inherited from class java.lang.Object

  `clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

- ## Field Details

  - ### DO_DYNAMIC

    public static final String DO_DYNAMIC

  - ### POST_TYPECHECKING_REPLACEMENT

    public static final String POST_TYPECHECKING_REPLACEMENT

- ## Constructor Details

  - ### TraitASTTransformation

    public TraitASTTransformation()

- ## Method Details

  - ### setCompilationUnit

    public void setCompilationUnit(CompilationUnit unit)
    Specified by:
      `setCompilationUnit` in interface `CompilationUnitAware`

  - ### visit

    public void visit(ASTNode[] nodes, SourceUnit source)
    Description copied from interface: `ASTTransformation`
    The method is invoked when an AST Transformation is active. For local transformations, it is invoked once each time the local annotation is encountered. For global transformations, it is invoked once for every source unit, which is typically a source file.
    Specified by:
      `visit` in interface `ASTTransformation`
    Parameters:
      `nodes` - The ASTnodes when the call was triggered. Element 0 is the AnnotationNode that triggered this annotation to be activated. Element 1 is the AnnotatedNode decorated, such as a MethodNode or ClassNode. For global transformations it is usually safe to ignore this parameter.
      `source` - The source unit being compiled. The source unit may contain several classes. For global transformations, information about the AST can be retrieved from this object.