com.fitbur.bytebuddy.implementation.bind.annotation.Empty Maven / Gradle / Ivy
package com.fitbur.bytebuddy.implementation.bind.annotation;
import com.fitbur.bytebuddy.description.annotation.AnnotationDescription;
import com.fitbur.bytebuddy.description.method.MethodDescription;
import com.fitbur.bytebuddy.description.method.ParameterDescription;
import com.fitbur.bytebuddy.implementation.Implementation;
import com.fitbur.bytebuddy.implementation.bind.MethodDelegationBinder;
import com.fitbur.bytebuddy.implementation.bytecode.assign.Assigner;
import com.fitbur.bytebuddy.implementation.bytecode.constant.DefaultValue;
import java.lang.annotation.*;
/**
* Binds the parameter type's default value to the annotated parameter, i.e. {@code null} or a numeric value
* representing zero.
*
* @see com.fitbur.bytebuddy.implementation.MethodDelegation
* @see com.fitbur.bytebuddy.implementation.bind.annotation.TargetMethodAnnotationDrivenBinder
*/
@Documented
@Retention(RetentionPolicy.RUNTIME)
@Target(ElementType.PARAMETER)
public @interface Empty {
/**
* A binder for the {@link com.fitbur.bytebuddy.implementation.bind.annotation.Empty} annotation.
*/
enum Binder implements TargetMethodAnnotationDrivenBinder.ParameterBinder {
/**
* The singleton instance.
*/
INSTANCE;
@Override
public Class getHandledType() {
return Empty.class;
}
@Override
public MethodDelegationBinder.ParameterBinding bind(AnnotationDescription.Loadable annotation,
MethodDescription source,
ParameterDescription target,
Implementation.Target implementationTarget,
Assigner assigner) {
return new MethodDelegationBinder.ParameterBinding.Anonymous(DefaultValue.of(target.getType().asErasure()));
}
@Override
public String toString() {
return "Empty.Binder." + name();
}
}
}