protected override IEntityHandleObject CreateValueFromKey(EntityHandle handle)
{
object item;
switch (handle.Kind)
{
case HandleKind.TypeDefinition:
item = new EcmaType(_module, (TypeDefinitionHandle)handle);
break;
case HandleKind.MethodDefinition:
{
MethodDefinitionHandle methodDefinitionHandle = (MethodDefinitionHandle)handle;
TypeDefinitionHandle typeDefinitionHandle = _module._metadataReader.GetMethodDefinition(methodDefinitionHandle).GetDeclaringType();
EcmaType type = (EcmaType)_module.GetObject(typeDefinitionHandle, NotFoundBehavior.Throw);
item = new EcmaMethod(type, methodDefinitionHandle);
}
break;
case HandleKind.FieldDefinition:
{
FieldDefinitionHandle fieldDefinitionHandle = (FieldDefinitionHandle)handle;
TypeDefinitionHandle typeDefinitionHandle = _module._metadataReader.GetFieldDefinition(fieldDefinitionHandle).GetDeclaringType();
EcmaType type = (EcmaType)_module.GetObject(typeDefinitionHandle, NotFoundBehavior.Throw);
item = new EcmaField(type, fieldDefinitionHandle);
}
break;
case HandleKind.TypeReference:
item = _module.ResolveTypeReference((TypeReferenceHandle)handle);
break;
case HandleKind.MemberReference:
item = _module.ResolveMemberReference((MemberReferenceHandle)handle);
break;
case HandleKind.AssemblyReference:
item = _module.ResolveAssemblyReference((AssemblyReferenceHandle)handle);
break;
case HandleKind.TypeSpecification:
item = _module.ResolveTypeSpecification((TypeSpecificationHandle)handle);
break;
case HandleKind.MethodSpecification:
item = _module.ResolveMethodSpecification((MethodSpecificationHandle)handle);
break;
case HandleKind.ExportedType:
item = _module.ResolveExportedType((ExportedTypeHandle)handle);
break;
case HandleKind.StandaloneSignature:
item = _module.ResolveStandaloneSignature((StandaloneSignatureHandle)handle);
break;
case HandleKind.ModuleDefinition:
// ECMA-335 Partition 2 II.22.38 1d: This should not occur in a CLI ("compressed metadata") module,
// but resolves to "current module".
item = _module;
break;
case HandleKind.ModuleReference:
item = _module.ResolveModuleReference((ModuleReferenceHandle)handle);
break;
default:
ThrowHelper.ThrowBadImageFormatException("unknown metadata token type: " + handle.Kind);
item = null;
break;
}
switch (handle.Kind)
{
case HandleKind.TypeDefinition:
case HandleKind.MethodDefinition:
case HandleKind.FieldDefinition:
// type/method/field definitions directly correspond to their target item.
return((IEntityHandleObject)item);
default:
// Everything else is some form of reference which cannot be self-describing
return(new EcmaObjectLookupWrapper(handle, item));
}
}