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reified.go
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reified.go
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package zinc
import (
"reflect"
)
type reifiedSingle struct {
options *Options
query string
unnamedArgs Args
namedArgs NamedArgs
boundQuery string
boundArgs []any
postProcessors []PostProcessor
}
type reifiedBatch struct {
options *Options
data []*reifiedOne
}
type reifiedOne struct {
query string
unnamedArgs Args
namedArgs NamedArgs
boundQuery string
boundArgs []any
}
func reifySingle(q any, args []any, opts *Options) (*reifiedSingle, error) {
// copy options
opts1 := reifyOptions(args, opts)
// get actual query
q1, err := reifySql(q, opts1)
if err != nil {
return nil, ErrInvalidArg
}
// get actual args
unnamedArgs, namedArgs, postProcessors, err := reifyArgs(args, true, opts1)
if err != nil {
return nil, ErrInvalidArg
}
// bind
boundQuery, boundArgs, err := bind(q1, unnamedArgs, namedArgs, opts1)
if err != nil {
return nil, ErrInvalidArg
}
return &reifiedSingle{
options: opts1,
query: q1,
unnamedArgs: unnamedArgs,
namedArgs: namedArgs,
boundQuery: boundQuery,
boundArgs: boundArgs,
postProcessors: postProcessors,
}, nil
}
func reifyBatch(q any, batchedArgs any, optionalArgs []any, opts *Options) (*reifiedBatch, error) {
// copy options
opts1 := reifyOptions(optionalArgs, opts)
// get actual query
q1, err := reifySql(q, opts1)
if err != nil {
return nil, ErrInvalidArg
}
if batchedArgs == nil {
return &reifiedBatch{
options: opts1,
}, nil
}
batchedArgsVal := valueOf(batchedArgs)
if !isSliceOrArray(batchedArgsVal.Type()) {
return nil, ErrInvalidArg
}
n := batchedArgsVal.Len()
if n <= 0 {
return &reifiedBatch{
options: opts1,
}, nil
}
var data []*reifiedOne
for i := 0; i < n; i++ {
elemVal := batchedArgsVal.Index(i)
elemTyp := elemVal.Type()
elem := elemVal.Interface()
var unreifiedArgs []any
if isStruct(elemTyp) {
unreifiedArgs = []any{StructArgs(elem)}
} else if _, ok := isStructPtr(elemTyp); ok {
unreifiedArgs = []any{StructArgs(elem)}
} else if isRowMap(elemTyp) {
named := NamedArgs{}
if m, ok := elem.(map[string]any); ok {
for k, v := range m {
named[k] = v
}
} else if m, ok := elem.(NamedArgs); ok {
for k, v := range m {
named[k] = v
}
} else {
if elemVal.Type().Key() != typString {
return nil, ErrInvalidArg
}
iter := elemVal.MapRange()
for iter.Next() {
k := iter.Key()
v := iter.Value()
named[k.Interface().(string)] = v.Interface()
}
}
unreifiedArgs = []any{named}
} else if isSlice(elemTyp) {
var unnamed []any
if s, ok := elem.([]any); ok {
unnamed = append(unnamed, s...)
} else if s, ok := elem.(Args); ok {
unnamed = append(unnamed, s...)
} else {
n0 := elemVal.Len()
for i := 0; i < n0; i++ {
elemElem := elemVal.Index(i).Interface()
unnamed = append(unnamed, elemElem)
}
}
unreifiedArgs = unnamed
} else if isPrimitive(elemTyp) {
unreifiedArgs = []any{elem}
} else {
return nil, ErrInvalidArg
}
unnamedArgs, namedArgs, _, err := reifyArgs(unreifiedArgs, false, opts)
if err != nil {
return nil, ErrInvalidArg
}
boundQuery, boundArgs, err := bind(q1, unnamedArgs, namedArgs, opts)
if err != nil {
return nil, ErrInvalidArg
}
data = append(data, &reifiedOne{
query: q1,
unnamedArgs: unnamedArgs,
namedArgs: namedArgs,
boundQuery: boundQuery,
boundArgs: boundArgs,
})
}
return &reifiedBatch{
options: opts1,
data: data,
}, nil
}
func (rs *reifiedSingle) toLogParams() *logParams {
return &logParams{
query: rs.query,
unnamedArgs: rs.unnamedArgs,
namedArgs: rs.namedArgs,
boundQuery: rs.boundQuery,
boundArgs: rs.boundArgs,
}
}
func (rs *reifiedSingle) processResultSlice(resultVal reflect.Value) error {
for _, processor := range rs.postProcessors {
if err := processor.PostProcess(resultVal); err != nil {
return err
}
}
return nil
}
func (rb *reifiedBatch) isEmpty() bool {
return len(rb.data) <= 0
}
func (rb *reifiedBatch) isSameBoundQuery() bool {
if rb.isEmpty() {
return true
}
firstBoundQuery := rb.data[0].boundQuery
for _, ro := range rb.data {
if ro.boundQuery != firstBoundQuery {
return false
}
}
return true
}
func (rb *reifiedBatch) boundQuery() string {
if rb.isEmpty() {
return ""
}
return rb.data[0].boundQuery
}
func (ro *reifiedOne) toLogParams() *logParams {
return &logParams{
query: ro.query,
unnamedArgs: ro.unnamedArgs,
namedArgs: ro.namedArgs,
boundQuery: ro.boundQuery,
boundArgs: ro.boundArgs,
}
}
func reifyOptions(args []any, opts *Options) *Options {
opts = ensureOptions(opts)
for _, arg := range args {
if optionsModifier, ok := arg.(func(*Options)); ok && optionsModifier != nil {
optionsModifier(opts)
}
}
return opts
}
func reifySql(q any, opts *Options) (string, error) {
return toSql(q, opts)
}
func reifyArgs(args []any, withPostProcess bool, opts *Options) (Args, NamedArgs, []PostProcessor, error) {
// get actual args
var args1 []any
for _, arg := range args {
if provider, ok := arg.(ArgsProvider); ok && provider != nil {
if providedArgs, err := provider.ProvideArgs(opts); err != nil {
return nil, nil, nil, ErrInvalidArg
} else {
args1 = append(args1, providedArgs...)
}
} else {
args1 = append(args1, arg)
}
}
var unnamedArgs Args
var namedArgs NamedArgs
var postProcessors []PostProcessor
ensureNamedArgs := func() {
if namedArgs == nil {
namedArgs = NamedArgs{}
}
}
// process arg
for _, arg := range args1 {
switch a := arg.(type) {
case NamedArg:
ensureNamedArgs()
if a.Name != "" {
namedArgs[a.Name] = a.Value
} else {
unnamedArgs = append(unnamedArgs, a.Value)
}
case *NamedArg:
if a != nil {
ensureNamedArgs()
if a.Name != "" {
namedArgs[a.Name] = a.Value
} else {
unnamedArgs = append(unnamedArgs, a.Value)
}
}
case NamedArgs:
ensureNamedArgs()
for k, v := range a {
if k != "" {
namedArgs[k] = v
} else {
return nil, nil, nil, ErrInvalidArg
}
}
case map[string]any:
ensureNamedArgs()
for k, v := range a {
if k != "" {
namedArgs[k] = v
} else {
return nil, nil, nil, ErrInvalidArg
}
}
case PostProcessor:
if !withPostProcess {
return nil, nil, nil, ErrInvalidArg
}
if a != nil {
postProcessors = append(postProcessors, a)
}
case PostProcessorFunc:
if !withPostProcess {
return nil, nil, nil, ErrInvalidArg
}
if a != nil {
postProcessors = append(postProcessors, a)
}
case func(reflect.Value) error:
if !withPostProcess {
return nil, nil, nil, ErrInvalidArg
}
if a != nil {
postProcessors = append(postProcessors, PostProcessorFunc(a))
}
case []PostProcessor:
if !withPostProcess {
return nil, nil, nil, ErrInvalidArg
}
for _, p := range a {
if p != nil {
postProcessors = append(postProcessors, p)
}
}
case []PostProcessorFunc:
if !withPostProcess {
return nil, nil, nil, ErrInvalidArg
}
for _, p := range a {
if p != nil {
postProcessors = append(postProcessors, p)
}
}
case []func(reflect.Value) error:
if !withPostProcess {
return nil, nil, nil, ErrInvalidArg
}
for _, p := range a {
if p != nil {
postProcessors = append(postProcessors, PostProcessorFunc(p))
}
}
default:
unnamedArgs = append(unnamedArgs, arg)
}
}
return unnamedArgs, namedArgs, postProcessors, nil
}