[NO TESTS NEEDED] Refactor generated code

Extracted common functionality to util function.

Signed-off-by: Matej Vasek <mvasek@redhat.com>

16 files changed, 32 insertions, 864 deletions

diff --git a/pkg/bindings/images/types_diff_options.go b/pkg/bindings/images/types_diff_options.go
index 4f2bf0f6b..ae4b4655b 100644
--- a/pkg/bindings/images/types_diff_options.go
+++ b/pkg/bindings/images/types_diff_options.go
@@ -2,12 +2,8 @@ package images
 
 import (
 	"net/url"
-	"reflect"
-	"strings"
 
 	"github.com/containers/podman/v2/pkg/bindings/util"
-	jsoniter "github.com/json-iterator/go"
-	"github.com/pkg/errors"
 )
 
 /*
@@ -16,58 +12,10 @@ This file is generated automatically by go generate.  Do not edit.
 
 // Changed
 func (o *DiffOptions) Changed(fieldName string) bool {
-	r := reflect.ValueOf(o)
-	value := reflect.Indirect(r).FieldByName(fieldName)
-	return !value.IsNil()
+	return util.Changed(o, fieldName)
 }
 
 // ToParams
 func (o *DiffOptions) ToParams() (url.Values, error) {
-	params := url.Values{}
-	if o == nil {
-		return params, nil
-	}
-	json := jsoniter.ConfigCompatibleWithStandardLibrary
-	s := reflect.ValueOf(o)
-	if reflect.Ptr == s.Kind() {
-		s = s.Elem()
-	}
-	sType := s.Type()
-	for i := 0; i < s.NumField(); i++ {
-		fieldName := sType.Field(i).Name
-		if !o.Changed(fieldName) {
-			continue
-		}
-		fieldName = strings.ToLower(fieldName)
-		f := s.Field(i)
-		if reflect.Ptr == f.Kind() {
-			f = f.Elem()
-		}
-		switch {
-		case util.IsSimpleType(f):
-			params.Set(fieldName, util.SimpleTypeToParam(f))
-		case f.Kind() == reflect.Slice:
-			for i := 0; i < f.Len(); i++ {
-				elem := f.Index(i)
-				if util.IsSimpleType(elem) {
-					params.Add(fieldName, util.SimpleTypeToParam(elem))
-				} else {
-					return nil, errors.New("slices must contain only simple types")
-				}
-			}
-		case f.Kind() == reflect.Map:
-			lowerCaseKeys := make(map[string][]string)
-			iter := f.MapRange()
-			for iter.Next() {
-				lowerCaseKeys[iter.Key().Interface().(string)] = iter.Value().Interface().([]string)
-			}
-			s, err := json.MarshalToString(lowerCaseKeys)
-			if err != nil {
-				return nil, err
-			}
-
-			params.Set(fieldName, s)
-		}
-	}
-	return params, nil
+	return util.ToParams(o)
 }
diff --git a/pkg/bindings/images/types_exists_options.go b/pkg/bindings/images/types_exists_options.go
index 689c80902..9de1b9878 100644
--- a/pkg/bindings/images/types_exists_options.go
+++ b/pkg/bindings/images/types_exists_options.go
@@ -2,12 +2,8 @@ package images
 
 import (
 	"net/url"
-	"reflect"
-	"strings"
 
 	"github.com/containers/podman/v2/pkg/bindings/util"
-	jsoniter "github.com/json-iterator/go"
-	"github.com/pkg/errors"
 )
 
 /*
@@ -16,58 +12,10 @@ This file is generated automatically by go generate.  Do not edit.
 
 // Changed
 func (o *ExistsOptions) Changed(fieldName string) bool {
-	r := reflect.ValueOf(o)
-	value := reflect.Indirect(r).FieldByName(fieldName)
-	return !value.IsNil()
+	return util.Changed(o, fieldName)
 }
 
 // ToParams
 func (o *ExistsOptions) ToParams() (url.Values, error) {
-	params := url.Values{}
-	if o == nil {
-		return params, nil
-	}
-	json := jsoniter.ConfigCompatibleWithStandardLibrary
-	s := reflect.ValueOf(o)
-	if reflect.Ptr == s.Kind() {
-		s = s.Elem()
-	}
-	sType := s.Type()
-	for i := 0; i < s.NumField(); i++ {
-		fieldName := sType.Field(i).Name
-		if !o.Changed(fieldName) {
-			continue
-		}
-		fieldName = strings.ToLower(fieldName)
-		f := s.Field(i)
-		if reflect.Ptr == f.Kind() {
-			f = f.Elem()
-		}
-		switch {
-		case util.IsSimpleType(f):
-			params.Set(fieldName, util.SimpleTypeToParam(f))
-		case f.Kind() == reflect.Slice:
-			for i := 0; i < f.Len(); i++ {
-				elem := f.Index(i)
-				if util.IsSimpleType(elem) {
-					params.Add(fieldName, util.SimpleTypeToParam(elem))
-				} else {
-					return nil, errors.New("slices must contain only simple types")
-				}
-			}
-		case f.Kind() == reflect.Map:
-			lowerCaseKeys := make(map[string][]string)
-			iter := f.MapRange()
-			for iter.Next() {
-				lowerCaseKeys[iter.Key().Interface().(string)] = iter.Value().Interface().([]string)
-			}
-			s, err := json.MarshalToString(lowerCaseKeys)
-			if err != nil {
-				return nil, err
-			}
-
-			params.Set(fieldName, s)
-		}
-	}
-	return params, nil
+	return util.ToParams(o)
 }
diff --git a/pkg/bindings/images/types_export_options.go b/pkg/bindings/images/types_export_options.go
index 31361deb2..dcce565f6 100644
--- a/pkg/bindings/images/types_export_options.go
+++ b/pkg/bindings/images/types_export_options.go
@@ -2,12 +2,8 @@ package images
 
 import (
 	"net/url"
-	"reflect"
-	"strings"
 
 	"github.com/containers/podman/v2/pkg/bindings/util"
-	jsoniter "github.com/json-iterator/go"
-	"github.com/pkg/errors"
 )
 
 /*
@@ -16,60 +12,12 @@ This file is generated automatically by go generate.  Do not edit.
 
 // Changed
 func (o *ExportOptions) Changed(fieldName string) bool {
-	r := reflect.ValueOf(o)
-	value := reflect.Indirect(r).FieldByName(fieldName)
-	return !value.IsNil()
+	return util.Changed(o, fieldName)
 }
 
 // ToParams
 func (o *ExportOptions) ToParams() (url.Values, error) {
-	params := url.Values{}
-	if o == nil {
-		return params, nil
-	}
-	json := jsoniter.ConfigCompatibleWithStandardLibrary
-	s := reflect.ValueOf(o)
-	if reflect.Ptr == s.Kind() {
-		s = s.Elem()
-	}
-	sType := s.Type()
-	for i := 0; i < s.NumField(); i++ {
-		fieldName := sType.Field(i).Name
-		if !o.Changed(fieldName) {
-			continue
-		}
-		fieldName = strings.ToLower(fieldName)
-		f := s.Field(i)
-		if reflect.Ptr == f.Kind() {
-			f = f.Elem()
-		}
-		switch {
-		case util.IsSimpleType(f):
-			params.Set(fieldName, util.SimpleTypeToParam(f))
-		case f.Kind() == reflect.Slice:
-			for i := 0; i < f.Len(); i++ {
-				elem := f.Index(i)
-				if util.IsSimpleType(elem) {
-					params.Add(fieldName, util.SimpleTypeToParam(elem))
-				} else {
-					return nil, errors.New("slices must contain only simple types")
-				}
-			}
-		case f.Kind() == reflect.Map:
-			lowerCaseKeys := make(map[string][]string)
-			iter := f.MapRange()
-			for iter.Next() {
-				lowerCaseKeys[iter.Key().Interface().(string)] = iter.Value().Interface().([]string)
-			}
-			s, err := json.MarshalToString(lowerCaseKeys)
-			if err != nil {
-				return nil, err
-			}
-
-			params.Set(fieldName, s)
-		}
-	}
-	return params, nil
+	return util.ToParams(o)
 }
 
 // WithCompress
diff --git a/pkg/bindings/images/types_get_options.go b/pkg/bindings/images/types_get_options.go
index 5eb178a74..b9d00d82c 100644
--- a/pkg/bindings/images/types_get_options.go
+++ b/pkg/bindings/images/types_get_options.go
@@ -2,12 +2,8 @@ package images
 
 import (
 	"net/url"
-	"reflect"
-	"strings"
 
 	"github.com/containers/podman/v2/pkg/bindings/util"
-	jsoniter "github.com/json-iterator/go"
-	"github.com/pkg/errors"
 )
 
 /*
@@ -16,60 +12,12 @@ This file is generated automatically by go generate.  Do not edit.
 
 // Changed
 func (o *GetOptions) Changed(fieldName string) bool {
-	r := reflect.ValueOf(o)
-	value := reflect.Indirect(r).FieldByName(fieldName)
-	return !value.IsNil()
+	return util.Changed(o, fieldName)
 }
 
 // ToParams
 func (o *GetOptions) ToParams() (url.Values, error) {
-	params := url.Values{}
-	if o == nil {
-		return params, nil
-	}
-	json := jsoniter.ConfigCompatibleWithStandardLibrary
-	s := reflect.ValueOf(o)
-	if reflect.Ptr == s.Kind() {
-		s = s.Elem()
-	}
-	sType := s.Type()
-	for i := 0; i < s.NumField(); i++ {
-		fieldName := sType.Field(i).Name
-		if !o.Changed(fieldName) {
-			continue
-		}
-		fieldName = strings.ToLower(fieldName)
-		f := s.Field(i)
-		if reflect.Ptr == f.Kind() {
-			f = f.Elem()
-		}
-		switch {
-		case util.IsSimpleType(f):
-			params.Set(fieldName, util.SimpleTypeToParam(f))
-		case f.Kind() == reflect.Slice:
-			for i := 0; i < f.Len(); i++ {
-				elem := f.Index(i)
-				if util.IsSimpleType(elem) {
-					params.Add(fieldName, util.SimpleTypeToParam(elem))
-				} else {
-					return nil, errors.New("slices must contain only simple types")
-				}
-			}
-		case f.Kind() == reflect.Map:
-			lowerCaseKeys := make(map[string][]string)
-			iter := f.MapRange()
-			for iter.Next() {
-				lowerCaseKeys[iter.Key().Interface().(string)] = iter.Value().Interface().([]string)
-			}
-			s, err := json.MarshalToString(lowerCaseKeys)
-			if err != nil {
-				return nil, err
-			}
-
-			params.Set(fieldName, s)
-		}
-	}
-	return params, nil
+	return util.ToParams(o)
 }
 
 // WithSize
diff --git a/pkg/bindings/images/types_history_options.go b/pkg/bindings/images/types_history_options.go
index becabaa59..e2cd43852 100644
--- a/pkg/bindings/images/types_history_options.go
+++ b/pkg/bindings/images/types_history_options.go
@@ -2,12 +2,8 @@ package images
 
 import (
 	"net/url"
-	"reflect"
-	"strings"
 
 	"github.com/containers/podman/v2/pkg/bindings/util"
-	jsoniter "github.com/json-iterator/go"
-	"github.com/pkg/errors"
 )
 
 /*
@@ -16,58 +12,10 @@ This file is generated automatically by go generate.  Do not edit.
 
 // Changed
 func (o *HistoryOptions) Changed(fieldName string) bool {
-	r := reflect.ValueOf(o)
-	value := reflect.Indirect(r).FieldByName(fieldName)
-	return !value.IsNil()
+	return util.Changed(o, fieldName)
 }
 
 // ToParams
 func (o *HistoryOptions) ToParams() (url.Values, error) {
-	params := url.Values{}
-	if o == nil {
-		return params, nil
-	}
-	json := jsoniter.ConfigCompatibleWithStandardLibrary
-	s := reflect.ValueOf(o)
-	if reflect.Ptr == s.Kind() {
-		s = s.Elem()
-	}
-	sType := s.Type()
-	for i := 0; i < s.NumField(); i++ {
-		fieldName := sType.Field(i).Name
-		if !o.Changed(fieldName) {
-			continue
-		}
-		fieldName = strings.ToLower(fieldName)
-		f := s.Field(i)
-		if reflect.Ptr == f.Kind() {
-			f = f.Elem()
-		}
-		switch {
-		case util.IsSimpleType(f):
-			params.Set(fieldName, util.SimpleTypeToParam(f))
-		case f.Kind() == reflect.Slice:
-			for i := 0; i < f.Len(); i++ {
-				elem := f.Index(i)
-				if util.IsSimpleType(elem) {
-					params.Add(fieldName, util.SimpleTypeToParam(elem))
-				} else {
-					return nil, errors.New("slices must contain only simple types")
-				}
-			}
-		case f.Kind() == reflect.Map:
-			lowerCaseKeys := make(map[string][]string)
-			iter := f.MapRange()
-			for iter.Next() {
-				lowerCaseKeys[iter.Key().Interface().(string)] = iter.Value().Interface().([]string)
-			}
-			s, err := json.MarshalToString(lowerCaseKeys)
-			if err != nil {
-				return nil, err
-			}
-
-			params.Set(fieldName, s)
-		}
-	}
-	return params, nil
+	return util.ToParams(o)
 }
diff --git a/pkg/bindings/images/types_import_options.go b/pkg/bindings/images/types_import_options.go
index 6e9160b63..ff409cc7c 100644
--- a/pkg/bindings/images/types_import_options.go
+++ b/pkg/bindings/images/types_import_options.go
@@ -2,12 +2,8 @@ package images
 
 import (
 	"net/url"
-	"reflect"
-	"strings"
 
 	"github.com/containers/podman/v2/pkg/bindings/util"
-	jsoniter "github.com/json-iterator/go"
-	"github.com/pkg/errors"
 )
 
 /*
@@ -16,60 +12,12 @@ This file is generated automatically by go generate.  Do not edit.
 
 // Changed
 func (o *ImportOptions) Changed(fieldName string) bool {
-	r := reflect.ValueOf(o)
-	value := reflect.Indirect(r).FieldByName(fieldName)
-	return !value.IsNil()
+	return util.Changed(o, fieldName)
 }
 
 // ToParams
 func (o *ImportOptions) ToParams() (url.Values, error) {
-	params := url.Values{}
-	if o == nil {
-		return params, nil
-	}
-	json := jsoniter.ConfigCompatibleWithStandardLibrary
-	s := reflect.ValueOf(o)
-	if reflect.Ptr == s.Kind() {
-		s = s.Elem()
-	}
-	sType := s.Type()
-	for i := 0; i < s.NumField(); i++ {
-		fieldName := sType.Field(i).Name
-		if !o.Changed(fieldName) {
-			continue
-		}
-		fieldName = strings.ToLower(fieldName)
-		f := s.Field(i)
-		if reflect.Ptr == f.Kind() {
-			f = f.Elem()
-		}
-		switch {
-		case util.IsSimpleType(f):
-			params.Set(fieldName, util.SimpleTypeToParam(f))
-		case f.Kind() == reflect.Slice:
-			for i := 0; i < f.Len(); i++ {
-				elem := f.Index(i)
-				if util.IsSimpleType(elem) {
-					params.Add(fieldName, util.SimpleTypeToParam(elem))
-				} else {
-					return nil, errors.New("slices must contain only simple types")
-				}
-			}
-		case f.Kind() == reflect.Map:
-			lowerCaseKeys := make(map[string][]string)
-			iter := f.MapRange()
-			for iter.Next() {
-				lowerCaseKeys[iter.Key().Interface().(string)] = iter.Value().Interface().([]string)
-			}
-			s, err := json.MarshalToString(lowerCaseKeys)
-			if err != nil {
-				return nil, err
-			}
-
-			params.Set(fieldName, s)
-		}
-	}
-	return params, nil
+	return util.ToParams(o)
 }
 
 // WithChanges
diff --git a/pkg/bindings/images/types_list_options.go b/pkg/bindings/images/types_list_options.go
index 12d186f6b..38d1bde70 100644
--- a/pkg/bindings/images/types_list_options.go
+++ b/pkg/bindings/images/types_list_options.go
@@ -2,12 +2,8 @@ package images
 
 import (
 	"net/url"
-	"reflect"
-	"strings"
 
 	"github.com/containers/podman/v2/pkg/bindings/util"
-	jsoniter "github.com/json-iterator/go"
-	"github.com/pkg/errors"
 )
 
 /*
@@ -16,60 +12,12 @@ This file is generated automatically by go generate.  Do not edit.
 
 // Changed
 func (o *ListOptions) Changed(fieldName string) bool {
-	r := reflect.ValueOf(o)
-	value := reflect.Indirect(r).FieldByName(fieldName)
-	return !value.IsNil()
+	return util.Changed(o, fieldName)
 }
 
 // ToParams
 func (o *ListOptions) ToParams() (url.Values, error) {
-	params := url.Values{}
-	if o == nil {
-		return params, nil
-	}
-	json := jsoniter.ConfigCompatibleWithStandardLibrary
-	s := reflect.ValueOf(o)
-	if reflect.Ptr == s.Kind() {
-		s = s.Elem()
-	}
-	sType := s.Type()
-	for i := 0; i < s.NumField(); i++ {
-		fieldName := sType.Field(i).Name
-		if !o.Changed(fieldName) {
-			continue
-		}
-		fieldName = strings.ToLower(fieldName)
-		f := s.Field(i)
-		if reflect.Ptr == f.Kind() {
-			f = f.Elem()
-		}
-		switch {
-		case util.IsSimpleType(f):
-			params.Set(fieldName, util.SimpleTypeToParam(f))
-		case f.Kind() == reflect.Slice:
-			for i := 0; i < f.Len(); i++ {
-				elem := f.Index(i)
-				if util.IsSimpleType(elem) {
-					params.Add(fieldName, util.SimpleTypeToParam(elem))
-				} else {
-					return nil, errors.New("slices must contain only simple types")
-				}
-			}
-		case f.Kind() == reflect.Map:
-			lowerCaseKeys := make(map[string][]string)
-			iter := f.MapRange()
-			for iter.Next() {
-				lowerCaseKeys[iter.Key().Interface().(string)] = iter.Value().Interface().([]string)
-			}
-			s, err := json.MarshalToString(lowerCaseKeys)
-			if err != nil {
-				return nil, err
-			}
-
-			params.Set(fieldName, s)
-		}
-	}
-	return params, nil
+	return util.ToParams(o)
 }
 
 // WithAll
diff --git a/pkg/bindings/images/types_load_options.go b/pkg/bindings/images/types_load_options.go
index 913568937..d17e7cc10 100644
--- a/pkg/bindings/images/types_load_options.go
+++ b/pkg/bindings/images/types_load_options.go
@@ -2,12 +2,8 @@ package images
 
 import (
 	"net/url"
-	"reflect"
-	"strings"
 
 	"github.com/containers/podman/v2/pkg/bindings/util"
-	jsoniter "github.com/json-iterator/go"
-	"github.com/pkg/errors"
 )
 
 /*
@@ -16,60 +12,12 @@ This file is generated automatically by go generate.  Do not edit.
 
 // Changed
 func (o *LoadOptions) Changed(fieldName string) bool {
-	r := reflect.ValueOf(o)
-	value := reflect.Indirect(r).FieldByName(fieldName)
-	return !value.IsNil()
+	return util.Changed(o, fieldName)
 }
 
 // ToParams
 func (o *LoadOptions) ToParams() (url.Values, error) {
-	params := url.Values{}
-	if o == nil {
-		return params, nil
-	}
-	json := jsoniter.ConfigCompatibleWithStandardLibrary
-	s := reflect.ValueOf(o)
-	if reflect.Ptr == s.Kind() {
-		s = s.Elem()
-	}
-	sType := s.Type()
-	for i := 0; i < s.NumField(); i++ {
-		fieldName := sType.Field(i).Name
-		if !o.Changed(fieldName) {
-			continue
-		}
-		fieldName = strings.ToLower(fieldName)
-		f := s.Field(i)
-		if reflect.Ptr == f.Kind() {
-			f = f.Elem()
-		}
-		switch {
-		case util.IsSimpleType(f):
-			params.Set(fieldName, util.SimpleTypeToParam(f))
-		case f.Kind() == reflect.Slice:
-			for i := 0; i < f.Len(); i++ {
-				elem := f.Index(i)
-				if util.IsSimpleType(elem) {
-					params.Add(fieldName, util.SimpleTypeToParam(elem))
-				} else {
-					return nil, errors.New("slices must contain only simple types")
-				}
-			}
-		case f.Kind() == reflect.Map:
-			lowerCaseKeys := make(map[string][]string)
-			iter := f.MapRange()
-			for iter.Next() {
-				lowerCaseKeys[iter.Key().Interface().(string)] = iter.Value().Interface().([]string)
-			}
-			s, err := json.MarshalToString(lowerCaseKeys)
-			if err != nil {
-				return nil, err
-			}
-
-			params.Set(fieldName, s)
-		}
-	}
-	return params, nil
+	return util.ToParams(o)
 }
 
 // WithReference
diff --git a/pkg/bindings/images/types_prune_options.go b/pkg/bindings/images/types_prune_options.go
index dad83dd2f..deef211c1 100644
--- a/pkg/bindings/images/types_prune_options.go
+++ b/pkg/bindings/images/types_prune_options.go
@@ -2,12 +2,8 @@ package images
 
 import (
 	"net/url"
-	"reflect"
-	"strings"
 
 	"github.com/containers/podman/v2/pkg/bindings/util"
-	jsoniter "github.com/json-iterator/go"
-	"github.com/pkg/errors"
 )
 
 /*
@@ -16,60 +12,12 @@ This file is generated automatically by go generate.  Do not edit.
 
 // Changed
 func (o *PruneOptions) Changed(fieldName string) bool {
-	r := reflect.ValueOf(o)
-	value := reflect.Indirect(r).FieldByName(fieldName)
-	return !value.IsNil()
+	return util.Changed(o, fieldName)
 }
 
 // ToParams
 func (o *PruneOptions) ToParams() (url.Values, error) {
-	params := url.Values{}
-	if o == nil {
-		return params, nil
-	}
-	json := jsoniter.ConfigCompatibleWithStandardLibrary
-	s := reflect.ValueOf(o)
-	if reflect.Ptr == s.Kind() {
-		s = s.Elem()
-	}
-	sType := s.Type()
-	for i := 0; i < s.NumField(); i++ {
-		fieldName := sType.Field(i).Name
-		if !o.Changed(fieldName) {
-			continue
-		}
-		fieldName = strings.ToLower(fieldName)
-		f := s.Field(i)
-		if reflect.Ptr == f.Kind() {
-			f = f.Elem()
-		}
-		switch {
-		case util.IsSimpleType(f):
-			params.Set(fieldName, util.SimpleTypeToParam(f))
-		case f.Kind() == reflect.Slice:
-			for i := 0; i < f.Len(); i++ {
-				elem := f.Index(i)
-				if util.IsSimpleType(elem) {
-					params.Add(fieldName, util.SimpleTypeToParam(elem))
-				} else {
-					return nil, errors.New("slices must contain only simple types")
-				}
-			}
-		case f.Kind() == reflect.Map:
-			lowerCaseKeys := make(map[string][]string)
-			iter := f.MapRange()
-			for iter.Next() {
-				lowerCaseKeys[iter.Key().Interface().(string)] = iter.Value().Interface().([]string)
-			}
-			s, err := json.MarshalToString(lowerCaseKeys)
-			if err != nil {
-				return nil, err
-			}
-
-			params.Set(fieldName, s)
-		}
-	}
-	return params, nil
+	return util.ToParams(o)
 }
 
 // WithAll
diff --git a/pkg/bindings/images/types_pull_options.go b/pkg/bindings/images/types_pull_options.go
index c3c7a3dc4..2220ade26 100644
--- a/pkg/bindings/images/types_pull_options.go
+++ b/pkg/bindings/images/types_pull_options.go
@@ -2,12 +2,8 @@ package images
 
 import (
 	"net/url"
-	"reflect"
-	"strings"
 
 	"github.com/containers/podman/v2/pkg/bindings/util"
-	jsoniter "github.com/json-iterator/go"
-	"github.com/pkg/errors"
 )
 
 /*
@@ -16,60 +12,12 @@ This file is generated automatically by go generate.  Do not edit.
 
 // Changed
 func (o *PullOptions) Changed(fieldName string) bool {
-	r := reflect.ValueOf(o)
-	value := reflect.Indirect(r).FieldByName(fieldName)
-	return !value.IsNil()
+	return util.Changed(o, fieldName)
 }
 
 // ToParams
 func (o *PullOptions) ToParams() (url.Values, error) {
-	params := url.Values{}
-	if o == nil {
-		return params, nil
-	}
-	json := jsoniter.ConfigCompatibleWithStandardLibrary
-	s := reflect.ValueOf(o)
-	if reflect.Ptr == s.Kind() {
-		s = s.Elem()
-	}
-	sType := s.Type()
-	for i := 0; i < s.NumField(); i++ {
-		fieldName := sType.Field(i).Name
-		if !o.Changed(fieldName) {
-			continue
-		}
-		fieldName = strings.ToLower(fieldName)
-		f := s.Field(i)
-		if reflect.Ptr == f.Kind() {
-			f = f.Elem()
-		}
-		switch {
-		case util.IsSimpleType(f):
-			params.Set(fieldName, util.SimpleTypeToParam(f))
-		case f.Kind() == reflect.Slice:
-			for i := 0; i < f.Len(); i++ {
-				elem := f.Index(i)
-				if util.IsSimpleType(elem) {
-					params.Add(fieldName, util.SimpleTypeToParam(elem))
-				} else {
-					return nil, errors.New("slices must contain only simple types")
-				}
-			}
-		case f.Kind() == reflect.Map:
-			lowerCaseKeys := make(map[string][]string)
-			iter := f.MapRange()
-			for iter.Next() {
-				lowerCaseKeys[iter.Key().Interface().(string)] = iter.Value().Interface().([]string)
-			}
-			s, err := json.MarshalToString(lowerCaseKeys)
-			if err != nil {
-				return nil, err
-			}
-
-			params.Set(fieldName, s)
-		}
-	}
-	return params, nil
+	return util.ToParams(o)
 }
 
 // WithAllTags
diff --git a/pkg/bindings/images/types_push_options.go b/pkg/bindings/images/types_push_options.go
index 26a8d7e91..be14e7d78 100644
--- a/pkg/bindings/images/types_push_options.go
+++ b/pkg/bindings/images/types_push_options.go
@@ -2,12 +2,8 @@ package images
 
 import (
 	"net/url"
-	"reflect"
-	"strings"
 
 	"github.com/containers/podman/v2/pkg/bindings/util"
-	jsoniter "github.com/json-iterator/go"
-	"github.com/pkg/errors"
 )
 
 /*
@@ -16,60 +12,12 @@ This file is generated automatically by go generate.  Do not edit.
 
 // Changed
 func (o *PushOptions) Changed(fieldName string) bool {
-	r := reflect.ValueOf(o)
-	value := reflect.Indirect(r).FieldByName(fieldName)
-	return !value.IsNil()
+	return util.Changed(o, fieldName)
 }
 
 // ToParams
 func (o *PushOptions) ToParams() (url.Values, error) {
-	params := url.Values{}
-	if o == nil {
-		return params, nil
-	}
-	json := jsoniter.ConfigCompatibleWithStandardLibrary
-	s := reflect.ValueOf(o)
-	if reflect.Ptr == s.Kind() {
-		s = s.Elem()
-	}
-	sType := s.Type()
-	for i := 0; i < s.NumField(); i++ {
-		fieldName := sType.Field(i).Name
-		if !o.Changed(fieldName) {
-			continue
-		}
-		fieldName = strings.ToLower(fieldName)
-		f := s.Field(i)
-		if reflect.Ptr == f.Kind() {
-			f = f.Elem()
-		}
-		switch {
-		case util.IsSimpleType(f):
-			params.Set(fieldName, util.SimpleTypeToParam(f))
-		case f.Kind() == reflect.Slice:
-			for i := 0; i < f.Len(); i++ {
-				elem := f.Index(i)
-				if util.IsSimpleType(elem) {
-					params.Add(fieldName, util.SimpleTypeToParam(elem))
-				} else {
-					return nil, errors.New("slices must contain only simple types")
-				}
-			}
-		case f.Kind() == reflect.Map:
-			lowerCaseKeys := make(map[string][]string)
-			iter := f.MapRange()
-			for iter.Next() {
-				lowerCaseKeys[iter.Key().Interface().(string)] = iter.Value().Interface().([]string)
-			}
-			s, err := json.MarshalToString(lowerCaseKeys)
-			if err != nil {
-				return nil, err
-			}
-
-			params.Set(fieldName, s)
-		}
-	}
-	return params, nil
+	return util.ToParams(o)
 }
 
 // WithAll
diff --git a/pkg/bindings/images/types_remove_options.go b/pkg/bindings/images/types_remove_options.go
index fba4f63b6..964fca265 100644
--- a/pkg/bindings/images/types_remove_options.go
+++ b/pkg/bindings/images/types_remove_options.go
@@ -2,12 +2,8 @@ package images
 
 import (
 	"net/url"
-	"reflect"
-	"strings"
 
 	"github.com/containers/podman/v2/pkg/bindings/util"
-	jsoniter "github.com/json-iterator/go"
-	"github.com/pkg/errors"
 )
 
 /*
@@ -16,60 +12,12 @@ This file is generated automatically by go generate.  Do not edit.
 
 // Changed
 func (o *RemoveOptions) Changed(fieldName string) bool {
-	r := reflect.ValueOf(o)
-	value := reflect.Indirect(r).FieldByName(fieldName)
-	return !value.IsNil()
+	return util.Changed(o, fieldName)
 }
 
 // ToParams
 func (o *RemoveOptions) ToParams() (url.Values, error) {
-	params := url.Values{}
-	if o == nil {
-		return params, nil
-	}
-	json := jsoniter.ConfigCompatibleWithStandardLibrary
-	s := reflect.ValueOf(o)
-	if reflect.Ptr == s.Kind() {
-		s = s.Elem()
-	}
-	sType := s.Type()
-	for i := 0; i < s.NumField(); i++ {
-		fieldName := sType.Field(i).Name
-		if !o.Changed(fieldName) {
-			continue
-		}
-		fieldName = strings.ToLower(fieldName)
-		f := s.Field(i)
-		if reflect.Ptr == f.Kind() {
-			f = f.Elem()
-		}
-		switch {
-		case util.IsSimpleType(f):
-			params.Set(fieldName, util.SimpleTypeToParam(f))
-		case f.Kind() == reflect.Slice:
-			for i := 0; i < f.Len(); i++ {
-				elem := f.Index(i)
-				if util.IsSimpleType(elem) {
-					params.Add(fieldName, util.SimpleTypeToParam(elem))
-				} else {
-					return nil, errors.New("slices must contain only simple types")
-				}
-			}
-		case f.Kind() == reflect.Map:
-			lowerCaseKeys := make(map[string][]string)
-			iter := f.MapRange()
-			for iter.Next() {
-				lowerCaseKeys[iter.Key().Interface().(string)] = iter.Value().Interface().([]string)
-			}
-			s, err := json.MarshalToString(lowerCaseKeys)
-			if err != nil {
-				return nil, err
-			}
-
-			params.Set(fieldName, s)
-		}
-	}
-	return params, nil
+	return util.ToParams(o)
 }
 
 // WithAll
diff --git a/pkg/bindings/images/types_search_options.go b/pkg/bindings/images/types_search_options.go
index 812a9abd3..1321d1910 100644
--- a/pkg/bindings/images/types_search_options.go
+++ b/pkg/bindings/images/types_search_options.go
@@ -2,12 +2,8 @@ package images
 
 import (
 	"net/url"
-	"reflect"
-	"strings"
 
 	"github.com/containers/podman/v2/pkg/bindings/util"
-	jsoniter "github.com/json-iterator/go"
-	"github.com/pkg/errors"
 )
 
 /*
@@ -16,60 +12,12 @@ This file is generated automatically by go generate.  Do not edit.
 
 // Changed
 func (o *SearchOptions) Changed(fieldName string) bool {
-	r := reflect.ValueOf(o)
-	value := reflect.Indirect(r).FieldByName(fieldName)
-	return !value.IsNil()
+	return util.Changed(o, fieldName)
 }
 
 // ToParams
 func (o *SearchOptions) ToParams() (url.Values, error) {
-	params := url.Values{}
-	if o == nil {
-		return params, nil
-	}
-	json := jsoniter.ConfigCompatibleWithStandardLibrary
-	s := reflect.ValueOf(o)
-	if reflect.Ptr == s.Kind() {
-		s = s.Elem()
-	}
-	sType := s.Type()
-	for i := 0; i < s.NumField(); i++ {
-		fieldName := sType.Field(i).Name
-		if !o.Changed(fieldName) {
-			continue
-		}
-		fieldName = strings.ToLower(fieldName)
-		f := s.Field(i)
-		if reflect.Ptr == f.Kind() {
-			f = f.Elem()
-		}
-		switch {
-		case util.IsSimpleType(f):
-			params.Set(fieldName, util.SimpleTypeToParam(f))
-		case f.Kind() == reflect.Slice:
-			for i := 0; i < f.Len(); i++ {
-				elem := f.Index(i)
-				if util.IsSimpleType(elem) {
-					params.Add(fieldName, util.SimpleTypeToParam(elem))
-				} else {
-					return nil, errors.New("slices must contain only simple types")
-				}
-			}
-		case f.Kind() == reflect.Map:
-			lowerCaseKeys := make(map[string][]string)
-			iter := f.MapRange()
-			for iter.Next() {
-				lowerCaseKeys[iter.Key().Interface().(string)] = iter.Value().Interface().([]string)
-			}
-			s, err := json.MarshalToString(lowerCaseKeys)
-			if err != nil {
-				return nil, err
-			}
-
-			params.Set(fieldName, s)
-		}
-	}
-	return params, nil
+	return util.ToParams(o)
 }
 
 // WithAuthfile
diff --git a/pkg/bindings/images/types_tag_options.go b/pkg/bindings/images/types_tag_options.go
index e1217a9aa..74977e10a 100644
--- a/pkg/bindings/images/types_tag_options.go
+++ b/pkg/bindings/images/types_tag_options.go
@@ -2,12 +2,8 @@ package images
 
 import (
 	"net/url"
-	"reflect"
-	"strings"
 
 	"github.com/containers/podman/v2/pkg/bindings/util"
-	jsoniter "github.com/json-iterator/go"
-	"github.com/pkg/errors"
 )
 
 /*
@@ -16,58 +12,10 @@ This file is generated automatically by go generate.  Do not edit.
 
 // Changed
 func (o *TagOptions) Changed(fieldName string) bool {
-	r := reflect.ValueOf(o)
-	value := reflect.Indirect(r).FieldByName(fieldName)
-	return !value.IsNil()
+	return util.Changed(o, fieldName)
 }
 
 // ToParams
 func (o *TagOptions) ToParams() (url.Values, error) {
-	params := url.Values{}
-	if o == nil {
-		return params, nil
-	}
-	json := jsoniter.ConfigCompatibleWithStandardLibrary
-	s := reflect.ValueOf(o)
-	if reflect.Ptr == s.Kind() {
-		s = s.Elem()
-	}
-	sType := s.Type()
-	for i := 0; i < s.NumField(); i++ {
-		fieldName := sType.Field(i).Name
-		if !o.Changed(fieldName) {
-			continue
-		}
-		fieldName = strings.ToLower(fieldName)
-		f := s.Field(i)
-		if reflect.Ptr == f.Kind() {
-			f = f.Elem()
-		}
-		switch {
-		case util.IsSimpleType(f):
-			params.Set(fieldName, util.SimpleTypeToParam(f))
-		case f.Kind() == reflect.Slice:
-			for i := 0; i < f.Len(); i++ {
-				elem := f.Index(i)
-				if util.IsSimpleType(elem) {
-					params.Add(fieldName, util.SimpleTypeToParam(elem))
-				} else {
-					return nil, errors.New("slices must contain only simple types")
-				}
-			}
-		case f.Kind() == reflect.Map:
-			lowerCaseKeys := make(map[string][]string)
-			iter := f.MapRange()
-			for iter.Next() {
-				lowerCaseKeys[iter.Key().Interface().(string)] = iter.Value().Interface().([]string)
-			}
-			s, err := json.MarshalToString(lowerCaseKeys)
-			if err != nil {
-				return nil, err
-			}
-
-			params.Set(fieldName, s)
-		}
-	}
-	return params, nil
+	return util.ToParams(o)
 }
diff --git a/pkg/bindings/images/types_tree_options.go b/pkg/bindings/images/types_tree_options.go
index 0a574ffc1..a07a3a647 100644
--- a/pkg/bindings/images/types_tree_options.go
+++ b/pkg/bindings/images/types_tree_options.go
@@ -2,12 +2,8 @@ package images
 
 import (
 	"net/url"
-	"reflect"
-	"strings"
 
 	"github.com/containers/podman/v2/pkg/bindings/util"
-	jsoniter "github.com/json-iterator/go"
-	"github.com/pkg/errors"
 )
 
 /*
@@ -16,60 +12,12 @@ This file is generated automatically by go generate.  Do not edit.
 
 // Changed
 func (o *TreeOptions) Changed(fieldName string) bool {
-	r := reflect.ValueOf(o)
-	value := reflect.Indirect(r).FieldByName(fieldName)
-	return !value.IsNil()
+	return util.Changed(o, fieldName)
 }
 
 // ToParams
 func (o *TreeOptions) ToParams() (url.Values, error) {
-	params := url.Values{}
-	if o == nil {
-		return params, nil
-	}
-	json := jsoniter.ConfigCompatibleWithStandardLibrary
-	s := reflect.ValueOf(o)
-	if reflect.Ptr == s.Kind() {
-		s = s.Elem()
-	}
-	sType := s.Type()
-	for i := 0; i < s.NumField(); i++ {
-		fieldName := sType.Field(i).Name
-		if !o.Changed(fieldName) {
-			continue
-		}
-		fieldName = strings.ToLower(fieldName)
-		f := s.Field(i)
-		if reflect.Ptr == f.Kind() {
-			f = f.Elem()
-		}
-		switch {
-		case util.IsSimpleType(f):
-			params.Set(fieldName, util.SimpleTypeToParam(f))
-		case f.Kind() == reflect.Slice:
-			for i := 0; i < f.Len(); i++ {
-				elem := f.Index(i)
-				if util.IsSimpleType(elem) {
-					params.Add(fieldName, util.SimpleTypeToParam(elem))
-				} else {
-					return nil, errors.New("slices must contain only simple types")
-				}
-			}
-		case f.Kind() == reflect.Map:
-			lowerCaseKeys := make(map[string][]string)
-			iter := f.MapRange()
-			for iter.Next() {
-				lowerCaseKeys[iter.Key().Interface().(string)] = iter.Value().Interface().([]string)
-			}
-			s, err := json.MarshalToString(lowerCaseKeys)
-			if err != nil {
-				return nil, err
-			}
-
-			params.Set(fieldName, s)
-		}
-	}
-	return params, nil
+	return util.ToParams(o)
 }
 
 // WithWhatRequires
diff --git a/pkg/bindings/images/types_untag_options.go b/pkg/bindings/images/types_untag_options.go
index ced84876e..3f7ac4a5a 100644
--- a/pkg/bindings/images/types_untag_options.go
+++ b/pkg/bindings/images/types_untag_options.go
@@ -2,12 +2,8 @@ package images
 
 import (
 	"net/url"
-	"reflect"
-	"strings"
 
 	"github.com/containers/podman/v2/pkg/bindings/util"
-	jsoniter "github.com/json-iterator/go"
-	"github.com/pkg/errors"
 )
 
 /*
@@ -16,58 +12,10 @@ This file is generated automatically by go generate.  Do not edit.
 
 // Changed
 func (o *UntagOptions) Changed(fieldName string) bool {
-	r := reflect.ValueOf(o)
-	value := reflect.Indirect(r).FieldByName(fieldName)
-	return !value.IsNil()
+	return util.Changed(o, fieldName)
 }
 
 // ToParams
 func (o *UntagOptions) ToParams() (url.Values, error) {
-	params := url.Values{}
-	if o == nil {
-		return params, nil
-	}
-	json := jsoniter.ConfigCompatibleWithStandardLibrary
-	s := reflect.ValueOf(o)
-	if reflect.Ptr == s.Kind() {
-		s = s.Elem()
-	}
-	sType := s.Type()
-	for i := 0; i < s.NumField(); i++ {
-		fieldName := sType.Field(i).Name
-		if !o.Changed(fieldName) {
-			continue
-		}
-		fieldName = strings.ToLower(fieldName)
-		f := s.Field(i)
-		if reflect.Ptr == f.Kind() {
-			f = f.Elem()
-		}
-		switch {
-		case util.IsSimpleType(f):
-			params.Set(fieldName, util.SimpleTypeToParam(f))
-		case f.Kind() == reflect.Slice:
-			for i := 0; i < f.Len(); i++ {
-				elem := f.Index(i)
-				if util.IsSimpleType(elem) {
-					params.Add(fieldName, util.SimpleTypeToParam(elem))
-				} else {
-					return nil, errors.New("slices must contain only simple types")
-				}
-			}
-		case f.Kind() == reflect.Map:
-			lowerCaseKeys := make(map[string][]string)
-			iter := f.MapRange()
-			for iter.Next() {
-				lowerCaseKeys[iter.Key().Interface().(string)] = iter.Value().Interface().([]string)
-			}
-			s, err := json.MarshalToString(lowerCaseKeys)
-			if err != nil {
-				return nil, err
-			}
-
-			params.Set(fieldName, s)
-		}
-	}
-	return params, nil
+	return util.ToParams(o)
 }