mirror of
https://github.com/ceph/ceph-csi.git
synced 2024-11-24 07:10:20 +00:00
120 lines
3.7 KiB
Go
120 lines
3.7 KiB
Go
/*
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Copyright 2023 The Kubernetes Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package cel
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import (
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"github.com/google/cel-go/common/types/ref"
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exprpb "google.golang.org/genproto/googleapis/api/expr/v1alpha1"
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)
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var _ ref.TypeProvider = (*CompositedTypeProvider)(nil)
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var _ ref.TypeAdapter = (*CompositedTypeAdapter)(nil)
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// CompositedTypeProvider is the provider that tries each of the underlying
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// providers in order, and returns result of the first successful attempt.
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type CompositedTypeProvider struct {
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// Providers contains the underlying type providers.
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// If Providers is empty, the CompositedTypeProvider becomes no-op provider.
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Providers []ref.TypeProvider
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}
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// EnumValue finds out the numeric value of the given enum name.
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// The result comes from first provider that returns non-nil.
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func (c *CompositedTypeProvider) EnumValue(enumName string) ref.Val {
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for _, p := range c.Providers {
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val := p.EnumValue(enumName)
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if val != nil {
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return val
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}
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}
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return nil
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}
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// FindIdent takes a qualified identifier name and returns a Value if one
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// exists. The result comes from first provider that returns non-nil.
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func (c *CompositedTypeProvider) FindIdent(identName string) (ref.Val, bool) {
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for _, p := range c.Providers {
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val, ok := p.FindIdent(identName)
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if ok {
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return val, ok
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}
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}
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return nil, false
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}
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// FindType finds the Type given a qualified type name, or return false
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// if none of the providers finds the type.
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// If any of the providers find the type, the first provider that returns true
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// will be the result.
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func (c *CompositedTypeProvider) FindType(typeName string) (*exprpb.Type, bool) {
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for _, p := range c.Providers {
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typ, ok := p.FindType(typeName)
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if ok {
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return typ, ok
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}
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}
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return nil, false
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}
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// FindFieldType returns the field type for a checked type value. Returns
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// false if none of the providers can find the type.
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// If multiple providers can find the field, the result is taken from
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// the first that does.
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func (c *CompositedTypeProvider) FindFieldType(messageType string, fieldName string) (*ref.FieldType, bool) {
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for _, p := range c.Providers {
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ft, ok := p.FindFieldType(messageType, fieldName)
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if ok {
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return ft, ok
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}
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}
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return nil, false
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}
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// NewValue creates a new type value from a qualified name and map of field
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// name to value.
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// If multiple providers can create the new type, the first that returns
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// non-nil will decide the result.
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func (c *CompositedTypeProvider) NewValue(typeName string, fields map[string]ref.Val) ref.Val {
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for _, p := range c.Providers {
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v := p.NewValue(typeName, fields)
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if v != nil {
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return v
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}
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}
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return nil
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}
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// CompositedTypeAdapter is the adapter that tries each of the underlying
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// type adapter in order until the first successfully conversion.
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type CompositedTypeAdapter struct {
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// Adapters contains underlying type adapters.
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// If Adapters is empty, the CompositedTypeAdapter becomes a no-op adapter.
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Adapters []ref.TypeAdapter
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}
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// NativeToValue takes the value and convert it into a ref.Val
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// The result comes from the first TypeAdapter that returns non-nil.
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func (c *CompositedTypeAdapter) NativeToValue(value interface{}) ref.Val {
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for _, a := range c.Adapters {
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v := a.NativeToValue(value)
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if v != nil {
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return v
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}
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}
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return nil
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}
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