package net.bytebuddy.implementation.bytecode.assign.primitive;
import lombok.EqualsAndHashCode;
import net.bytebuddy.description.type.TypeDescription;
import net.bytebuddy.implementation.bytecode.StackManipulation;
import net.bytebuddy.implementation.bytecode.assign.Assigner;
/**
* This assigner is able to handle non-{@code void}, primitive types. This means:
* <ol>
* <li>If a primitive type is assigned to a non-primitive type, it will attempt to widen the source type into the
* target type.</li>
* <li>If a primitive type is assigned to a non-primitive type, it will attempt to box the source type and then
* query the chained assigner for assigning the boxed type to the target type.</li>
* <li>If a non-primitive type is assigned to a primitive type, it will unbox the source type and then attempt a
* widening of the unboxed type into the target type. If the source type does not represent a wrapper type, it will
* attempt to infer the boxing type from the target type and check if the source type is assignable to this wrapper
* type.</li>
* <li>If two non-primitive types are subject of the assignment, it will delegate the assignment to its chained
* assigner.</li>
* </ol>
*/
@EqualsAndHashCode
public class PrimitiveTypeAwareAssigner implements Assigner {
/**
* Another assigner that is aware of assigning reference types. This assigner is queried for assigning
* non-primitive types or for assigning a boxed type to another non-primitive type.
*/
private final Assigner referenceTypeAwareAssigner;
/**
* Creates a new assigner with the given delegate.
*
* @param referenceTypeAwareAssigner A chained assigner that is queried for assignments not involving primitive
* types.
*/
public PrimitiveTypeAwareAssigner(Assigner referenceTypeAwareAssigner) {
this.referenceTypeAwareAssigner = referenceTypeAwareAssigner;
}
@Override
public StackManipulation assign(TypeDescription.Generic source, TypeDescription.Generic target, Typing typing) {
if (source.isPrimitive() && target.isPrimitive()) {
return PrimitiveWideningDelegate.forPrimitive(source).widenTo(target);
} else if (source.isPrimitive() /* && !target.isPrimitive() */) {
return PrimitiveBoxingDelegate.forPrimitive(source).assignBoxedTo(target, referenceTypeAwareAssigner, typing);
} else if (/* !source.isPrimitive() && */ target.isPrimitive()) {
return PrimitiveUnboxingDelegate.forReferenceType(source).assignUnboxedTo(target, referenceTypeAwareAssigner, typing);
} else /* !source.isPrimitive() && !target.isPrimitive()) */ {
return referenceTypeAwareAssigner.assign(source, target, typing);
}
}
}