@AutoFinal
@CompileStatic
class ASTTransformationCustomizer
extends CompilationCustomizer
implements CompilationUnitAware
This customizer allows applying an AST transformation to a source unit with several strategies. Creating a customizer with the class constructor will trigger an AST transformation for each class node of a source unit. However, you cannot pass parameters to the annotation so the default values will be used. Writing:
def configuration = new CompilerConfiguration()
configuration.addCompilationCustomizers(new ASTTransformationCustomizer(Log))
def shell = new GroovyShell(configuration)
shell.evaluate("""
class MyClass {
}""")
is equivalent to:
def shell = new GroovyShell()
shell.evaluate("""
@Log
class MyClass {
}""")
The class passed as a constructor parameter must be an AST transformation annotation.
Alternatively, you can apply a global AST transformation by calling the
AST transformation. In that case, the transformation is applied once for the whole source unit.
Unlike a global AST transformation declared in the META-INF/services/org.codehaus.groovy.transform.ASTTransformation
file, which are applied if the file is in the classpath, using this customizer you'll have the choice to apply
your transformation selectively. It can also be useful to debug global AST transformations without having to
package your annotation in a jar file. | Modifiers | Name | Description |
|---|---|---|
protected CompilationUnit |
compilationUnit |
Compilation unit currently being customized. |
| Type | Name and description |
|---|---|
ASTTransformation |
transformationTransformation instance applied by this customizer. |
| Constructor and description |
|---|
ASTTransformationCustomizer(Class<? extends Annotation> transformationAnnotation, String astTransformationClassName, ClassLoader transformationClassLoader)Creates an AST transformation customizer using the specified annotation. |
ASTTransformationCustomizer(Class<? extends Annotation> transformationAnnotation, String astTransformationClassName)Creates an AST transformation customizer using the specified annotation. |
ASTTransformationCustomizer(Map annotationParams, Class<? extends Annotation> transformationAnnotation, String astTransformationClassName, ClassLoader transformationClassLoader)Creates an AST transformation customizer using the specified annotation. |
ASTTransformationCustomizer(Map annotationParams, Class<? extends Annotation> transformationAnnotation, String astTransformationClassName)Creates an AST transformation customizer using the specified annotation, annotation parameters, and transformation class name. |
ASTTransformationCustomizer(Class<? extends Annotation> transformationAnnotation, ClassLoader transformationClassLoader)Creates an AST transformation customizer using the specified annotation. |
ASTTransformationCustomizer(Class<? extends Annotation> transformationAnnotation)Creates an AST transformation customizer using the specified annotation. |
ASTTransformationCustomizer(ASTTransformation transformation)Creates an AST transformation customizer using the specified transformation. |
ASTTransformationCustomizer(Map annotationParams, Class<? extends Annotation> transformationAnnotation, ClassLoader transformationClassLoader)Creates an AST transformation customizer using the specified annotation. |
ASTTransformationCustomizer(Map annotationParams, Class<? extends Annotation> transformationAnnotation)Creates an AST transformation customizer using the specified annotation and annotation parameters. |
ASTTransformationCustomizer(Map annotationParams, ASTTransformation transformation)Creates an AST transformation customizer using the specified transformation and annotation parameters. |
| Type Params | Return Type | Name and description |
|---|---|---|
|
void |
call(SourceUnit sourceUnit, GeneratorContext context, ClassNode classNode)Applies the configured transformation to the supplied class or source unit. |
|
static List<ASTTransformationCustomizer> |
forAnnotation(Class<? extends Annotation> transformationAnnotation)Creates one ASTTransformationCustomizer per AST transformation class declared by the given annotation's GroovyASTTransformationClass list. |
|
static List<ASTTransformationCustomizer> |
forAnnotation(Class<? extends Annotation> transformationAnnotation, ClassLoader transformationClassLoader)
|
|
static List<ASTTransformationCustomizer> |
forAnnotation(Map annotationParams, Class<? extends Annotation> transformationAnnotation)
|
|
static List<ASTTransformationCustomizer> |
forAnnotation(Map annotationParams, Class<? extends Annotation> transformationAnnotation, ClassLoader transformationClassLoader)
|
|
void |
setAnnotationParameters(Map<String, Object> parameters)Specify annotation parameters. |
|
void |
setCompilationUnit(CompilationUnit compilationUnit)Records the compilation unit that will receive the configured transformation. |
| Methods inherited from class | Name |
|---|---|
class CompilationCustomizer |
getPhase |
Compilation unit currently being customized.
Transformation instance applied by this customizer.
Creates an AST transformation customizer using the specified annotation. The transformation classloader can
be used if the transformation class cannot be loaded from the same class loader as the annotation class.
It's assumed that the annotation is not annotated with GroovyASTTransformationClass and so the
second argument supplies the link to the ASTTransformation class that should be used.
Creates an AST transformation customizer using the specified annotation. It's assumed that the annotation
is not annotated with GroovyASTTransformationClass and so the second argument supplies the link to
the ASTTransformation class that should be used.
Creates an AST transformation customizer using the specified annotation. The transformation classloader can
be used if the transformation class cannot be loaded from the same class loader as the annotation class.
Additionally, you can pass a map of parameters that will be used to parameterize the annotation.
It's assumed that the annotation is not annotated with GroovyASTTransformationClass and so the
second argument supplies the link to the ASTTransformation class that should be used.
Creates an AST transformation customizer using the specified annotation, annotation parameters, and transformation class name.
annotationParams - the annotation member values to applytransformationAnnotation - the transformation annotation typeastTransformationClassName - the implementation class name for the transformationCreates an AST transformation customizer using the specified annotation. The transformation classloader can be used if the transformation class cannot be loaded from the same class loader as the annotation class.
Creates an AST transformation customizer using the specified annotation.
Creates an AST transformation customizer using the specified transformation.
Creates an AST transformation customizer using the specified annotation. The transformation classloader can be used if the transformation class cannot be loaded from the same class loader as the annotation class. Additionally, you can pass a map of parameters that will be used to parameterize the annotation.
Creates an AST transformation customizer using the specified annotation and annotation parameters.
annotationParams - the annotation member values to applytransformationAnnotation - the transformation annotation typeCreates an AST transformation customizer using the specified transformation and annotation parameters.
annotationParams - the annotation member values to applytransformation - the transformation to invokeApplies the configured transformation to the supplied class or source unit.
sourceUnit - the current source unitcontext - the current generator contextclassNode - the class node being customizedCreates one ASTTransformationCustomizer per AST transformation class declared by the given annotation's GroovyASTTransformationClass list. This is the way to use the customizer with annotations whose implementation is split across multiple transforms running at different compile phases (e.g. Sealed, RecordBase).
Spread the result into CompilerConfiguration.addCompilationCustomizers:
configuration.addCompilationCustomizers(*ASTTransformationCustomizer.forAnnotation(Sealed))
Specify annotation parameters. For example, if the annotation is:
@Log(value='logger')
You could create an AST transformation customizer and specify the "value" parameter thanks to this method:
annotationParameters = [value: 'logger']
Note that you cannot specify annotation closure values directly. If the annotation you want to add takes
a closure as an argument, you will have to set a ClosureExpression instead. This can be done by either
creating a custom ClosureExpression from code, or using the AstBuilder.
Here is an example:
// add @Contract({distance >= 0 })
def customizer = new ASTTransformationCustomizer(Contract)
def expression = new AstBuilder().buildFromCode(CompilePhase.CONVERSION) { ->
distance >= 0
}.expression[0]
customizer.annotationParameters = [value: expression] Records the compilation unit that will receive the configured transformation.
compilationUnit - the owning compilation unitCopyright © 2003-2026 The Apache Software Foundation. All rights reserved.