com.oracle.svm.core.annotate

Interface RecomputeFieldValue.CustomFieldValueTransformer

All Known Implementing Classes:

RecomputeFieldValue.NewEmptyArrayTransformer

Enclosing class:

RecomputeFieldValue

public static interface RecomputeFieldValue.CustomFieldValueTransformer

Custom recomputation of field values. A class implementing this interface must have a no-argument constructor, which is used to instantiate it before invoking RecomputeFieldValue.CustomFieldValueTransformer.transform(jdk.vm.ci.meta.MetaAccessProvider, jdk.vm.ci.meta.ResolvedJavaField, jdk.vm.ci.meta.ResolvedJavaField, java.lang.Object, java.lang.Object). In contrast to RecomputeFieldValue.CustomFieldValueComputer, the RecomputeFieldValue.CustomFieldValueTransformer.transform(jdk.vm.ci.meta.MetaAccessProvider, jdk.vm.ci.meta.ResolvedJavaField, jdk.vm.ci.meta.ResolvedJavaField, java.lang.Object, java.lang.Object) method also has the original field value as a parameter. This is convenient if the new value depends on the original value, but also requires the original field to be present, e.g., it cannot be use for injected fields.

Method Summary

Modifier and Type	Method and Description
Object	transform(jdk.vm.ci.meta.MetaAccessProvider metaAccess, jdk.vm.ci.meta.ResolvedJavaField original, jdk.vm.ci.meta.ResolvedJavaField annotated, Object receiver, Object originalValue) Computes the new field value.

Method Detail

transform

Object transform(jdk.vm.ci.meta.MetaAccessProvider metaAccess,
                 jdk.vm.ci.meta.ResolvedJavaField original,
                 jdk.vm.ci.meta.ResolvedJavaField annotated,
                 Object receiver,
                 Object originalValue)

Computes the new field value. This method can already be invoked during the analysis, especially when it computes the value of an object field that needs to be visited.

Parameters:

metaAccess - The AnalysisMetaAccess instance during the analysis or HostedMetaAccess instance after the analysis.

original - The original field.

annotated - The field annotated with RecomputeFieldValue.

receiver - The original object for instance fields, or null for static fields.

Returns:

The new field value.