private void preprocessSubstituteShapeReferencesInShape()

in codegen/src/main/java/software/amazon/awssdk/codegen/customization/processors/ShapeSubstitutionsProcessor.java [155:212]
40 lines of code
12 McCabe index (conditional complexity)

    private void preprocessSubstituteShapeReferencesInShape(
            String shapeName, Shape shape, ServiceModel serviceModel) {

        // structure members
        if (shape.getMembers() != null) {
            for (Entry<String, Member> entry : shape.getMembers().entrySet()) {
                String memberName = entry.getKey();
                Member member = entry.getValue();
                String memberShapeName = member.getShape();
                Shape memberShape = serviceModel.getShapes().get(memberShapeName);

                // First check if it's a list-type member and that the shape of
                // its list element should be substituted
                if (Utils.isListShape(memberShape)) {
                    Member nestedListMember = memberShape.getListMember();
                    String nestedListMemberOriginalShape = nestedListMember.getShape();

                    ShapeSubstitution appliedSubstitutionOnListMember = substituteMemberShape(nestedListMember);
                    if (appliedSubstitutionOnListMember != null &&
                        appliedSubstitutionOnListMember.getEmitFromMember() != null) {
                        // we will handle the emitFromMember customizations in post-process stage
                        trackListMemberSubstitution(shapeName, memberName, nestedListMemberOriginalShape);
                    }
                } else {
                    // Then check if the shape of the member itself is to be substituted
                    ShapeSubstitution appliedSubstitution = substituteMemberShape(member);
                    if (appliedSubstitution != null &&
                        appliedSubstitution.getEmitFromMember() != null) {
                        // we will handle the emitFromMember customizations in post-process stage
                        trackShapeMemberSubstitution(shapeName, memberName, memberShapeName);
                    }
                }

            }
        } else if (shape.getMapKeyType() != null) {
            // no need to check if the shape is a list, since a list shape is
            // always referenced by a top-level structure shape and that's already
            // handled by the code above

            // map key is not allowed to be substituted
            String mapKeyShape = shape.getMapKeyType().getShape();

            if (shapeSubstitutions.containsKey(mapKeyShape)) {
                throw new IllegalStateException(
                        "shapeSubstitution customization found for shape "
                        + mapKeyShape + ", but this shape is the key for a map shape.");
            }
        } else if (shape.getMapValueType() != null) {
            // map value is not allowed to be substituted
            String mapValShape = shape.getMapValueType().getShape();

            if (shapeSubstitutions.containsKey(mapValShape)) {
                throw new IllegalStateException(
                        "shapeSubstitution customization found for shape "
                        + mapValShape + ", but this shape is the value for a map shape.");
            }
        }
    }