// Copyright 2017 Istio Authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

// THIS FILE IS AUTOMATICALLY GENERATED.

package template

import (
	"context"
	"fmt"
	"net"
	"strings"

	"github.com/gogo/protobuf/proto"

	istio_adapter_model_v1beta1 "istio.io/api/mixer/adapter/model/v1beta1"
	istio_policy_v1beta1 "istio.io/api/policy/v1beta1"
	"istio.io/istio/mixer/pkg/adapter"
	"istio.io/istio/mixer/pkg/lang/compiled"
	"istio.io/istio/mixer/pkg/runtime/lang"
	"istio.io/istio/mixer/pkg/template"
	"istio.io/pkg/attribute"
	"istio.io/pkg/log"

	"istio.io/istio/mixer/test/spyAdapter/template/apa"

	"istio.io/istio/mixer/test/spyAdapter/template/check"

	"istio.io/istio/mixer/test/spyAdapter/template/checkoutput"

	"istio.io/istio/mixer/test/spyAdapter/template/quota"

	"istio.io/istio/mixer/test/spyAdapter/template/report"
)

// Add void usages for some imports so that go linter does not complain in case the imports does not get used in the
// below codegen.
var (
	_ net.IP
	_ istio_policy_v1beta1.AttributeManifest
	_ = strings.Reader{}
)

type (
	getFn         func(name string) (value interface{}, found bool)
	namesFn       func() []string
	doneFn        func()
	debugStringFn func() string
	wrapperAttr   struct {
		get         getFn
		names       namesFn
		done        doneFn
		debugString debugStringFn
	}
)

func newWrapperAttrBag(get getFn, names namesFn, done doneFn, debugString debugStringFn) attribute.Bag {
	return &wrapperAttr{
		debugString: debugString,
		done:        done,
		get:         get,
		names:       names,
	}
}

// Get returns an attribute value.
func (w *wrapperAttr) Get(name string) (value interface{}, found bool) {
	return w.get(name)
}

// Contains returns true if key is present.
func (w *wrapperAttr) Contains(key string) (found bool) {
	_, found = w.get(key)
	return found
}

// Names returns the names of all the attributes known to this bag.
func (w *wrapperAttr) Names() []string {
	return w.names()
}

// Done indicates the bag can be reclaimed.
func (w *wrapperAttr) Done() {
	w.done()
}

// ReferenceTracker implements the interface.
func (w *wrapperAttr) ReferenceTracker() attribute.ReferenceTracker {
	return nil
}

// String provides a dump of an attribute Bag that avoids affecting the
// calculation of referenced attributes.
func (w *wrapperAttr) String() string {
	return w.debugString()
}

var (
	SupportedTmplInfo = map[string]template.Info{

		sampleapa.TemplateName: {
			Name:               sampleapa.TemplateName,
			Impl:               "sampleapa",
			CtrCfg:             &sampleapa.InstanceParam{},
			Variety:            istio_adapter_model_v1beta1.TEMPLATE_VARIETY_ATTRIBUTE_GENERATOR,
			BldrInterfaceName:  sampleapa.TemplateName + "." + "HandlerBuilder",
			HndlrInterfaceName: sampleapa.TemplateName + "." + "Handler",
			BuilderSupportsTemplate: func(hndlrBuilder adapter.HandlerBuilder) bool {
				_, ok := hndlrBuilder.(sampleapa.HandlerBuilder)
				return ok
			},
			HandlerSupportsTemplate: func(hndlr adapter.Handler) bool {
				_, ok := hndlr.(sampleapa.Handler)
				return ok
			},
			InferType: func(cp proto.Message, tEvalFn template.TypeEvalFn) (proto.Message, error) {

				var BuildTemplate func(param *sampleapa.InstanceParam,
					path string) (proto.Message, error)

				_ = BuildTemplate

				BuildTemplate = func(param *sampleapa.InstanceParam,
					path string) (proto.Message, error) {

					if param == nil {
						return nil, nil
					}

					var err error = nil

					if param.Int64Primitive != "" {
						if t, e := tEvalFn(param.Int64Primitive); e != nil || t != istio_policy_v1beta1.INT64 {
							if e != nil {
								return nil, fmt.Errorf("failed to evaluate expression for field '%s': %v", path+"Int64Primitive", e)
							}
							return nil, fmt.Errorf("error type checking for field '%s': Evaluated expression type %v want %v", path+"Int64Primitive", t, istio_policy_v1beta1.INT64)
						}
					}

					if param.BoolPrimitive != "" {
						if t, e := tEvalFn(param.BoolPrimitive); e != nil || t != istio_policy_v1beta1.BOOL {
							if e != nil {
								return nil, fmt.Errorf("failed to evaluate expression for field '%s': %v", path+"BoolPrimitive", e)
							}
							return nil, fmt.Errorf("error type checking for field '%s': Evaluated expression type %v want %v", path+"BoolPrimitive", t, istio_policy_v1beta1.BOOL)
						}
					}

					if param.DoublePrimitive != "" {
						if t, e := tEvalFn(param.DoublePrimitive); e != nil || t != istio_policy_v1beta1.DOUBLE {
							if e != nil {
								return nil, fmt.Errorf("failed to evaluate expression for field '%s': %v", path+"DoublePrimitive", e)
							}
							return nil, fmt.Errorf("error type checking for field '%s': Evaluated expression type %v want %v", path+"DoublePrimitive", t, istio_policy_v1beta1.DOUBLE)
						}
					}

					if param.StringPrimitive != "" {
						if t, e := tEvalFn(param.StringPrimitive); e != nil || t != istio_policy_v1beta1.STRING {
							if e != nil {
								return nil, fmt.Errorf("failed to evaluate expression for field '%s': %v", path+"StringPrimitive", e)
							}
							return nil, fmt.Errorf("error type checking for field '%s': Evaluated expression type %v want %v", path+"StringPrimitive", t, istio_policy_v1beta1.STRING)
						}
					}

					return nil, err

				}

				instParam := cp.(*sampleapa.InstanceParam)

				const fullOutName = "sampleapa.output."
				for attr, exp := range instParam.AttributeBindings {
					expr := strings.Replace(exp, "$out.", fullOutName, -1)
					t1, err := tEvalFn(expr)
					if err != nil {
						return nil, fmt.Errorf("error evaluating AttributeBinding expression '%s' for attribute '%s': %v", expr, attr, err)
					}
					t2, err := tEvalFn(attr)
					if err != nil {
						return nil, fmt.Errorf("error evaluating AttributeBinding expression for attribute key '%s': %v", attr, err)
					}
					if t1 != t2 {
						return nil, fmt.Errorf(
							"error evaluating AttributeBinding: type '%v' for attribute '%s' does not match type '%s' for expression '%s'",
							t2, attr, t1, expr)
					}
				}

				return BuildTemplate(instParam, "")
			},

			AttributeManifests: []*istio_policy_v1beta1.AttributeManifest{
				{
					Attributes: map[string]*istio_policy_v1beta1.AttributeManifest_AttributeInfo{

						"sampleapa.output.int64Primitive": {
							ValueType: istio_policy_v1beta1.INT64,
						},

						"sampleapa.output.boolPrimitive": {
							ValueType: istio_policy_v1beta1.BOOL,
						},

						"sampleapa.output.doublePrimitive": {
							ValueType: istio_policy_v1beta1.DOUBLE,
						},

						"sampleapa.output.stringPrimitive": {
							ValueType: istio_policy_v1beta1.STRING,
						},

						"sampleapa.output.stringMap": {
							ValueType: istio_policy_v1beta1.STRING_MAP,
						},

						"sampleapa.output.ip": {
							ValueType: istio_policy_v1beta1.IP_ADDRESS,
						},

						"sampleapa.output.duration": {
							ValueType: istio_policy_v1beta1.DURATION,
						},

						"sampleapa.output.timestamp": {
							ValueType: istio_policy_v1beta1.TIMESTAMP,
						},

						"sampleapa.output.dns": {
							ValueType: istio_policy_v1beta1.DNS_NAME,
						},
					},
				},
			},

			// DispathGenAttrs dispatches the instance to the attribute producing handler.
			DispatchGenAttrs: func(ctx context.Context, handler adapter.Handler, inst interface{}, attrs attribute.Bag,
				mapper template.OutputMapperFn) (*attribute.MutableBag, error) {

				// Convert the instance from the generic interface{}, to their specialized type.
				instance := inst.(*sampleapa.Instance)

				// Invoke the handler.
				out, err := handler.(sampleapa.Handler).GenerateSampleApaAttributes(ctx, instance)
				if err != nil {
					return nil, err
				}

				// Construct a wrapper bag around the returned output message and pass it to the output mapper
				// to map $out values back to the destination attributes in the ambient context.
				const fullOutName = "sampleapa.output."
				outBag := newWrapperAttrBag(
					func(name string) (value interface{}, found bool) {
						field := strings.TrimPrefix(name, fullOutName)
						if len(field) != len(name) {
							if !out.WasSet(field) {
								return nil, false
							}
							switch field {

							case "int64Primitive":

								return out.Int64Primitive, true

							case "boolPrimitive":

								return out.BoolPrimitive, true

							case "doublePrimitive":

								return out.DoublePrimitive, true

							case "stringPrimitive":

								return out.StringPrimitive, true

							case "stringMap":

								return attribute.WrapStringMap(out.StringMap), true

							case "ip":

								return []byte(out.Ip), true

							case "duration":

								return out.Duration, true

							case "timestamp":

								return out.Timestamp, true

							case "dns":

								return string(out.Dns), true

							default:
								return nil, false
							}
						}
						return attrs.Get(name)
					},
					func() []string { return attrs.Names() },
					func() { attrs.Done() },
					func() string { return attrs.String() },
				)

				// Mapper will map back $out values in the outBag into ambient attribute names, and return
				// a bag with these additional attributes.
				return mapper(outBag)
			},

			// CreateInstanceBuilder creates a new template.InstanceBuilderFN based on the supplied instance parameters. It uses
			// the expression builder to create a new instance of a builder struct for the instance type. Created
			// InstanceBuilderFn closes over this struct. When InstanceBuilderFn is called it, in turn, calls into
			// the builder with an attribute bag.
			//
			// See template.CreateInstanceBuilderFn for more details.
			CreateInstanceBuilder: func(instanceName string, param proto.Message, expb lang.Compiler) (template.InstanceBuilderFn, error) {

				// If the parameter is nil. Simply return nil. The builder, then, will also return nil.
				if param == nil {
					return func(attr attribute.Bag) (interface{}, error) {
						return nil, nil
					}, nil
				}

				// Instantiate a new builder for the instance.
				builder, errp := newBuilder_sampleapa_Template(expb, param.(*sampleapa.InstanceParam))
				if !errp.IsNil() {
					return nil, errp.AsCompilationError(instanceName)
				}

				return func(attr attribute.Bag) (interface{}, error) {
					// Use the instantiated builder (that this fn closes over) to construct an instance.
					e, errp := builder.build(attr)
					if !errp.IsNil() {
						err := errp.AsEvaluationError(instanceName)
						log.Error(err.Error())
						return nil, err
					}

					e.Name = instanceName
					return e, nil
				}, nil
			},

			// CreateOutputExpressions creates a set of compiled expressions based on the supplied instance parameters.
			//
			// See template.CreateOutputExpressionsFn for more details.
			CreateOutputExpressions: func(
				instanceParam proto.Message,
				finder attribute.AttributeDescriptorFinder,
				expb lang.Compiler) (map[string]compiled.Expression, error) {
				var err error
				var expType istio_policy_v1beta1.ValueType

				// Convert the generic instanceParam to its specialized type.
				param := instanceParam.(*sampleapa.InstanceParam)

				// Create a mapping of expressions back to the attribute names.
				expressions := make(map[string]compiled.Expression, len(param.AttributeBindings))

				const fullOutName = "sampleapa.output."
				for attrName, outExpr := range param.AttributeBindings {
					attrInfo := finder.GetAttribute(attrName)
					if attrInfo == nil {
						log.Warnf("attribute not found when mapping outputs: attr='%s', expr='%s'", attrName, outExpr)
						continue
					}

					ex := strings.Replace(outExpr, "$out.", fullOutName, -1)

					if expressions[attrName], expType, err = expb.Compile(ex); err != nil {
						return nil, err
					}

					if attrInfo.ValueType != expType {
						log.Warnf("attribute type mismatch: attr='%s', attrType='%v', expr='%s', exprType='%v'", attrName, attrInfo.ValueType, outExpr, expType)
						continue
					}
				}

				return expressions, nil
			},
		},

		samplecheck.TemplateName: {
			Name:               samplecheck.TemplateName,
			Impl:               "samplecheck",
			CtrCfg:             &samplecheck.InstanceParam{},
			Variety:            istio_adapter_model_v1beta1.TEMPLATE_VARIETY_CHECK,
			BldrInterfaceName:  samplecheck.TemplateName + "." + "HandlerBuilder",
			HndlrInterfaceName: samplecheck.TemplateName + "." + "Handler",
			BuilderSupportsTemplate: func(hndlrBuilder adapter.HandlerBuilder) bool {
				_, ok := hndlrBuilder.(samplecheck.HandlerBuilder)
				return ok
			},
			HandlerSupportsTemplate: func(hndlr adapter.Handler) bool {
				_, ok := hndlr.(samplecheck.Handler)
				return ok
			},
			InferType: func(cp proto.Message, tEvalFn template.TypeEvalFn) (proto.Message, error) {

				var BuildTemplate func(param *samplecheck.InstanceParam,
					path string) (*samplecheck.Type, error)

				_ = BuildTemplate

				BuildTemplate = func(param *samplecheck.InstanceParam,
					path string) (*samplecheck.Type, error) {

					if param == nil {
						return nil, nil
					}

					infrdType := &samplecheck.Type{}

					var err error = nil

					if param.StringPrimitive != "" {
						if t, e := tEvalFn(param.StringPrimitive); e != nil || t != istio_policy_v1beta1.STRING {
							if e != nil {
								return nil, fmt.Errorf("failed to evaluate expression for field '%s': %v", path+"StringPrimitive", e)
							}
							return nil, fmt.Errorf("error type checking for field '%s': Evaluated expression type %v want %v", path+"StringPrimitive", t, istio_policy_v1beta1.STRING)
						}
					}

					return infrdType, err

				}

				instParam := cp.(*samplecheck.InstanceParam)

				return BuildTemplate(instParam, "")
			},

			SetType: func(types map[string]proto.Message, builder adapter.HandlerBuilder) {
				// Mixer framework should have ensured the type safety.
				castedBuilder := builder.(samplecheck.HandlerBuilder)
				castedTypes := make(map[string]*samplecheck.Type, len(types))
				for k, v := range types {
					// Mixer framework should have ensured the type safety.
					v1 := v.(*samplecheck.Type)
					castedTypes[k] = v1
				}
				castedBuilder.SetSampleCheckTypes(castedTypes)
			},

			// DispatchCheck dispatches the instance to the handler.
			DispatchCheck: func(ctx context.Context, handler adapter.Handler, inst interface{}, out *attribute.MutableBag, outPrefix string) (adapter.CheckResult, error) {

				// Convert the instance from the generic interface{}, to its specialized type.
				instance := inst.(*samplecheck.Instance)

				// Invoke the handler.
				return handler.(samplecheck.Handler).HandleSampleCheck(ctx, instance)
			},

			// CreateInstanceBuilder creates a new template.InstanceBuilderFN based on the supplied instance parameters. It uses
			// the expression builder to create a new instance of a builder struct for the instance type. Created
			// InstanceBuilderFn closes over this struct. When InstanceBuilderFn is called it, in turn, calls into
			// the builder with an attribute bag.
			//
			// See template.CreateInstanceBuilderFn for more details.
			CreateInstanceBuilder: func(instanceName string, param proto.Message, expb lang.Compiler) (template.InstanceBuilderFn, error) {

				// If the parameter is nil. Simply return nil. The builder, then, will also return nil.
				if param == nil {
					return func(attr attribute.Bag) (interface{}, error) {
						return nil, nil
					}, nil
				}

				// Instantiate a new builder for the instance.
				builder, errp := newBuilder_samplecheck_Template(expb, param.(*samplecheck.InstanceParam))
				if !errp.IsNil() {
					return nil, errp.AsCompilationError(instanceName)
				}

				return func(attr attribute.Bag) (interface{}, error) {
					// Use the instantiated builder (that this fn closes over) to construct an instance.
					e, errp := builder.build(attr)
					if !errp.IsNil() {
						err := errp.AsEvaluationError(instanceName)
						log.Error(err.Error())
						return nil, err
					}

					e.Name = instanceName
					return e, nil
				}, nil
			},
		},

		checkproducer.TemplateName: {
			Name:               checkproducer.TemplateName,
			Impl:               "checkproducer",
			CtrCfg:             &checkproducer.InstanceParam{},
			Variety:            istio_adapter_model_v1beta1.TEMPLATE_VARIETY_CHECK_WITH_OUTPUT,
			BldrInterfaceName:  checkproducer.TemplateName + "." + "HandlerBuilder",
			HndlrInterfaceName: checkproducer.TemplateName + "." + "Handler",
			BuilderSupportsTemplate: func(hndlrBuilder adapter.HandlerBuilder) bool {
				_, ok := hndlrBuilder.(checkproducer.HandlerBuilder)
				return ok
			},
			HandlerSupportsTemplate: func(hndlr adapter.Handler) bool {
				_, ok := hndlr.(checkproducer.Handler)
				return ok
			},
			InferType: func(cp proto.Message, tEvalFn template.TypeEvalFn) (proto.Message, error) {

				var BuildTemplate func(param *checkproducer.InstanceParam,
					path string) (*checkproducer.Type, error)

				_ = BuildTemplate

				BuildTemplate = func(param *checkproducer.InstanceParam,
					path string) (*checkproducer.Type, error) {

					if param == nil {
						return nil, nil
					}

					infrdType := &checkproducer.Type{}

					var err error = nil

					if param.StringPrimitive != "" {
						if t, e := tEvalFn(param.StringPrimitive); e != nil || t != istio_policy_v1beta1.STRING {
							if e != nil {
								return nil, fmt.Errorf("failed to evaluate expression for field '%s': %v", path+"StringPrimitive", e)
							}
							return nil, fmt.Errorf("error type checking for field '%s': Evaluated expression type %v want %v", path+"StringPrimitive", t, istio_policy_v1beta1.STRING)
						}
					}

					return infrdType, err

				}

				instParam := cp.(*checkproducer.InstanceParam)

				return BuildTemplate(instParam, "")
			},

			SetType: func(types map[string]proto.Message, builder adapter.HandlerBuilder) {
				// Mixer framework should have ensured the type safety.
				castedBuilder := builder.(checkproducer.HandlerBuilder)
				castedTypes := make(map[string]*checkproducer.Type, len(types))
				for k, v := range types {
					// Mixer framework should have ensured the type safety.
					v1 := v.(*checkproducer.Type)
					castedTypes[k] = v1
				}
				castedBuilder.SetCheckProducerTypes(castedTypes)
			},

			// DispatchCheck dispatches the instance to the handler.
			DispatchCheck: func(ctx context.Context, handler adapter.Handler, inst interface{}, out *attribute.MutableBag, outPrefix string) (adapter.CheckResult, error) {

				// Convert the instance from the generic interface{}, to its specialized type.
				instance := inst.(*checkproducer.Instance)

				// Invoke the handler.
				res, obj, err := handler.(checkproducer.Handler).HandleCheckProducer(ctx, instance)

				if out != nil {

					out.Set(outPrefix+"int64Primitive", obj.Int64Primitive)

					out.Set(outPrefix+"boolPrimitive", obj.BoolPrimitive)

					out.Set(outPrefix+"doublePrimitive", obj.DoublePrimitive)

					out.Set(outPrefix+"stringPrimitive", obj.StringPrimitive)

					out.Set(outPrefix+"stringMap", attribute.WrapStringMap(obj.StringMap))

				}
				return res, err
			},

			AttributeManifests: []*istio_policy_v1beta1.AttributeManifest{
				{
					Attributes: map[string]*istio_policy_v1beta1.AttributeManifest_AttributeInfo{

						"int64Primitive": {
							ValueType: istio_policy_v1beta1.INT64,
						},

						"boolPrimitive": {
							ValueType: istio_policy_v1beta1.BOOL,
						},

						"doublePrimitive": {
							ValueType: istio_policy_v1beta1.DOUBLE,
						},

						"stringPrimitive": {
							ValueType: istio_policy_v1beta1.STRING,
						},

						"stringMap": {
							ValueType: istio_policy_v1beta1.STRING_MAP,
						},
					},
				},
			},

			// CreateInstanceBuilder creates a new template.InstanceBuilderFN based on the supplied instance parameters. It uses
			// the expression builder to create a new instance of a builder struct for the instance type. Created
			// InstanceBuilderFn closes over this struct. When InstanceBuilderFn is called it, in turn, calls into
			// the builder with an attribute bag.
			//
			// See template.CreateInstanceBuilderFn for more details.
			CreateInstanceBuilder: func(instanceName string, param proto.Message, expb lang.Compiler) (template.InstanceBuilderFn, error) {

				// If the parameter is nil. Simply return nil. The builder, then, will also return nil.
				if param == nil {
					return func(attr attribute.Bag) (interface{}, error) {
						return nil, nil
					}, nil
				}

				// Instantiate a new builder for the instance.
				builder, errp := newBuilder_checkproducer_Template(expb, param.(*checkproducer.InstanceParam))
				if !errp.IsNil() {
					return nil, errp.AsCompilationError(instanceName)
				}

				return func(attr attribute.Bag) (interface{}, error) {
					// Use the instantiated builder (that this fn closes over) to construct an instance.
					e, errp := builder.build(attr)
					if !errp.IsNil() {
						err := errp.AsEvaluationError(instanceName)
						log.Error(err.Error())
						return nil, err
					}

					e.Name = instanceName
					return e, nil
				}, nil
			},
		},

		samplequota.TemplateName: {
			Name:               samplequota.TemplateName,
			Impl:               "samplequota",
			CtrCfg:             &samplequota.InstanceParam{},
			Variety:            istio_adapter_model_v1beta1.TEMPLATE_VARIETY_QUOTA,
			BldrInterfaceName:  samplequota.TemplateName + "." + "HandlerBuilder",
			HndlrInterfaceName: samplequota.TemplateName + "." + "Handler",
			BuilderSupportsTemplate: func(hndlrBuilder adapter.HandlerBuilder) bool {
				_, ok := hndlrBuilder.(samplequota.HandlerBuilder)
				return ok
			},
			HandlerSupportsTemplate: func(hndlr adapter.Handler) bool {
				_, ok := hndlr.(samplequota.Handler)
				return ok
			},
			InferType: func(cp proto.Message, tEvalFn template.TypeEvalFn) (proto.Message, error) {

				var BuildTemplate func(param *samplequota.InstanceParam,
					path string) (*samplequota.Type, error)

				_ = BuildTemplate

				BuildTemplate = func(param *samplequota.InstanceParam,
					path string) (*samplequota.Type, error) {

					if param == nil {
						return nil, nil
					}

					infrdType := &samplequota.Type{}

					var err error = nil

					infrdType.Dimensions = make(map[string]istio_policy_v1beta1.ValueType, len(param.Dimensions))

					for k, v := range param.Dimensions {

						if infrdType.Dimensions[k], err = tEvalFn(v); err != nil {

							return nil, fmt.Errorf("failed to evaluate expression for field '%s%s[%s]'; %v", path, "Dimensions", k, err)
						}
					}

					return infrdType, err

				}

				instParam := cp.(*samplequota.InstanceParam)

				return BuildTemplate(instParam, "")
			},

			SetType: func(types map[string]proto.Message, builder adapter.HandlerBuilder) {
				// Mixer framework should have ensured the type safety.
				castedBuilder := builder.(samplequota.HandlerBuilder)
				castedTypes := make(map[string]*samplequota.Type, len(types))
				for k, v := range types {
					// Mixer framework should have ensured the type safety.
					v1 := v.(*samplequota.Type)
					castedTypes[k] = v1
				}
				castedBuilder.SetSampleQuotaTypes(castedTypes)
			},

			// DispatchQuota dispatches the instance to the handler.
			DispatchQuota: func(ctx context.Context, handler adapter.Handler, inst interface{}, args adapter.QuotaArgs) (adapter.QuotaResult, error) {

				// Convert the instance from the generic interface{}, to its specialized type.
				instance := inst.(*samplequota.Instance)

				// Invoke the handler.
				return handler.(samplequota.Handler).HandleSampleQuota(ctx, instance, args)
			},

			// CreateInstanceBuilder creates a new template.InstanceBuilderFN based on the supplied instance parameters. It uses
			// the expression builder to create a new instance of a builder struct for the instance type. Created
			// InstanceBuilderFn closes over this struct. When InstanceBuilderFn is called it, in turn, calls into
			// the builder with an attribute bag.
			//
			// See template.CreateInstanceBuilderFn for more details.
			CreateInstanceBuilder: func(instanceName string, param proto.Message, expb lang.Compiler) (template.InstanceBuilderFn, error) {

				// If the parameter is nil. Simply return nil. The builder, then, will also return nil.
				if param == nil {
					return func(attr attribute.Bag) (interface{}, error) {
						return nil, nil
					}, nil
				}

				// Instantiate a new builder for the instance.
				builder, errp := newBuilder_samplequota_Template(expb, param.(*samplequota.InstanceParam))
				if !errp.IsNil() {
					return nil, errp.AsCompilationError(instanceName)
				}

				return func(attr attribute.Bag) (interface{}, error) {
					// Use the instantiated builder (that this fn closes over) to construct an instance.
					e, errp := builder.build(attr)
					if !errp.IsNil() {
						err := errp.AsEvaluationError(instanceName)
						log.Error(err.Error())
						return nil, err
					}

					e.Name = instanceName
					return e, nil
				}, nil
			},
		},

		samplereport.TemplateName: {
			Name:               samplereport.TemplateName,
			Impl:               "samplereport",
			CtrCfg:             &samplereport.InstanceParam{},
			Variety:            istio_adapter_model_v1beta1.TEMPLATE_VARIETY_REPORT,
			BldrInterfaceName:  samplereport.TemplateName + "." + "HandlerBuilder",
			HndlrInterfaceName: samplereport.TemplateName + "." + "Handler",
			BuilderSupportsTemplate: func(hndlrBuilder adapter.HandlerBuilder) bool {
				_, ok := hndlrBuilder.(samplereport.HandlerBuilder)
				return ok
			},
			HandlerSupportsTemplate: func(hndlr adapter.Handler) bool {
				_, ok := hndlr.(samplereport.Handler)
				return ok
			},
			InferType: func(cp proto.Message, tEvalFn template.TypeEvalFn) (proto.Message, error) {

				var BuildTemplate func(param *samplereport.InstanceParam,
					path string) (*samplereport.Type, error)

				_ = BuildTemplate

				BuildTemplate = func(param *samplereport.InstanceParam,
					path string) (*samplereport.Type, error) {

					if param == nil {
						return nil, nil
					}

					infrdType := &samplereport.Type{}

					var err error = nil

					if param.Value == "" {
						infrdType.Value = istio_policy_v1beta1.VALUE_TYPE_UNSPECIFIED
					} else if infrdType.Value, err = tEvalFn(param.Value); err != nil {
						return nil, fmt.Errorf("failed to evaluate expression for field '%s'; %v", path+"Value", err)
					}

					infrdType.Dimensions = make(map[string]istio_policy_v1beta1.ValueType, len(param.Dimensions))

					for k, v := range param.Dimensions {

						if infrdType.Dimensions[k], err = tEvalFn(v); err != nil {

							return nil, fmt.Errorf("failed to evaluate expression for field '%s%s[%s]'; %v", path, "Dimensions", k, err)
						}
					}

					return infrdType, err

				}

				instParam := cp.(*samplereport.InstanceParam)

				return BuildTemplate(instParam, "")
			},

			SetType: func(types map[string]proto.Message, builder adapter.HandlerBuilder) {
				// Mixer framework should have ensured the type safety.
				castedBuilder := builder.(samplereport.HandlerBuilder)
				castedTypes := make(map[string]*samplereport.Type, len(types))
				for k, v := range types {
					// Mixer framework should have ensured the type safety.
					v1 := v.(*samplereport.Type)
					castedTypes[k] = v1
				}
				castedBuilder.SetSampleReportTypes(castedTypes)
			},

			// DispatchReport dispatches the instances to the handler.
			DispatchReport: func(ctx context.Context, handler adapter.Handler, inst []interface{}) error {

				// Convert the instances from the generic []interface{}, to their specialized type.
				instances := make([]*samplereport.Instance, len(inst))
				for i, instance := range inst {
					instances[i] = instance.(*samplereport.Instance)
				}

				// Invoke the handler.
				if err := handler.(samplereport.Handler).HandleSampleReport(ctx, instances); err != nil {
					return fmt.Errorf("failed to report all values: %v", err)
				}
				return nil
			},

			// CreateInstanceBuilder creates a new template.InstanceBuilderFN based on the supplied instance parameters. It uses
			// the expression builder to create a new instance of a builder struct for the instance type. Created
			// InstanceBuilderFn closes over this struct. When InstanceBuilderFn is called it, in turn, calls into
			// the builder with an attribute bag.
			//
			// See template.CreateInstanceBuilderFn for more details.
			CreateInstanceBuilder: func(instanceName string, param proto.Message, expb lang.Compiler) (template.InstanceBuilderFn, error) {

				// If the parameter is nil. Simply return nil. The builder, then, will also return nil.
				if param == nil {
					return func(attr attribute.Bag) (interface{}, error) {
						return nil, nil
					}, nil
				}

				// Instantiate a new builder for the instance.
				builder, errp := newBuilder_samplereport_Template(expb, param.(*samplereport.InstanceParam))
				if !errp.IsNil() {
					return nil, errp.AsCompilationError(instanceName)
				}

				return func(attr attribute.Bag) (interface{}, error) {
					// Use the instantiated builder (that this fn closes over) to construct an instance.
					e, errp := builder.build(attr)
					if !errp.IsNil() {
						err := errp.AsEvaluationError(instanceName)
						log.Error(err.Error())
						return nil, err
					}

					e.Name = instanceName
					return e, nil
				}, nil
			},
		},
	}
)

// Builders for all known message types.

// builder struct for constructing an instance of Template.
type builder_sampleapa_Template struct {

	// builder for field int64Primitive: int64.

	bldInt64Primitive compiled.Expression

	// builder for field boolPrimitive: bool.

	bldBoolPrimitive compiled.Expression

	// builder for field doublePrimitive: float64.

	bldDoublePrimitive compiled.Expression

	// builder for field stringPrimitive: string.

	bldStringPrimitive compiled.Expression
} // builder_sampleapa_Template

// Instantiates and returns a new builder for Template, based on the provided instance parameter.
func newBuilder_sampleapa_Template(
	expb lang.Compiler,
	param *sampleapa.InstanceParam) (*builder_sampleapa_Template, template.ErrorPath) {

	// If the parameter is nil. Simply return nil. The builder, then, will also return nil.
	if param == nil {
		return nil, template.ErrorPath{}
	}

	b := &builder_sampleapa_Template{}

	var exp compiled.Expression
	_ = exp
	var err error
	_ = err
	var errp template.ErrorPath
	_ = errp
	var expType istio_policy_v1beta1.ValueType
	_ = expType

	if param.Int64Primitive == "" {
		b.bldInt64Primitive = nil
	} else {
		b.bldInt64Primitive, expType, err = expb.Compile(param.Int64Primitive)
		if err != nil {
			return nil, template.NewErrorPath("Int64Primitive", err)
		}

		if expType != istio_policy_v1beta1.INT64 {
			err = fmt.Errorf("instance field type mismatch: expected='%v', actual='%v', expression='%s'", istio_policy_v1beta1.INT64, expType, param.Int64Primitive)
			return nil, template.NewErrorPath("Int64Primitive", err)
		}

	}

	if param.BoolPrimitive == "" {
		b.bldBoolPrimitive = nil
	} else {
		b.bldBoolPrimitive, expType, err = expb.Compile(param.BoolPrimitive)
		if err != nil {
			return nil, template.NewErrorPath("BoolPrimitive", err)
		}

		if expType != istio_policy_v1beta1.BOOL {
			err = fmt.Errorf("instance field type mismatch: expected='%v', actual='%v', expression='%s'", istio_policy_v1beta1.BOOL, expType, param.BoolPrimitive)
			return nil, template.NewErrorPath("BoolPrimitive", err)
		}

	}

	if param.DoublePrimitive == "" {
		b.bldDoublePrimitive = nil
	} else {
		b.bldDoublePrimitive, expType, err = expb.Compile(param.DoublePrimitive)
		if err != nil {
			return nil, template.NewErrorPath("DoublePrimitive", err)
		}

		if expType != istio_policy_v1beta1.DOUBLE {
			err = fmt.Errorf("instance field type mismatch: expected='%v', actual='%v', expression='%s'", istio_policy_v1beta1.DOUBLE, expType, param.DoublePrimitive)
			return nil, template.NewErrorPath("DoublePrimitive", err)
		}

	}

	if param.StringPrimitive == "" {
		b.bldStringPrimitive = nil
	} else {
		b.bldStringPrimitive, expType, err = expb.Compile(param.StringPrimitive)
		if err != nil {
			return nil, template.NewErrorPath("StringPrimitive", err)
		}

		if expType != istio_policy_v1beta1.STRING {
			err = fmt.Errorf("instance field type mismatch: expected='%v', actual='%v', expression='%s'", istio_policy_v1beta1.STRING, expType, param.StringPrimitive)
			return nil, template.NewErrorPath("StringPrimitive", err)
		}

	}

	return b, template.ErrorPath{}
}

// build and return the instance, given a set of attributes.
func (b *builder_sampleapa_Template) build(
	attrs attribute.Bag) (*sampleapa.Instance, template.ErrorPath) {

	if b == nil {
		return nil, template.ErrorPath{}
	}

	var err error
	_ = err
	var errp template.ErrorPath
	_ = errp
	var vBool bool
	_ = vBool
	var vInt int64
	_ = vInt
	var vString string
	_ = vString
	var vDouble float64
	_ = vDouble
	var vIface interface{}
	_ = vIface

	r := &sampleapa.Instance{}

	if b.bldInt64Primitive != nil {

		vInt, err = b.bldInt64Primitive.EvaluateInteger(attrs)
		if err != nil {
			return nil, template.NewErrorPath("Int64Primitive", err)
		}
		r.Int64Primitive = vInt

	}

	if b.bldBoolPrimitive != nil {

		vBool, err = b.bldBoolPrimitive.EvaluateBoolean(attrs)
		if err != nil {
			return nil, template.NewErrorPath("BoolPrimitive", err)
		}
		r.BoolPrimitive = vBool

	}

	if b.bldDoublePrimitive != nil {

		vDouble, err = b.bldDoublePrimitive.EvaluateDouble(attrs)
		if err != nil {
			return nil, template.NewErrorPath("DoublePrimitive", err)
		}
		r.DoublePrimitive = vDouble

	}

	if b.bldStringPrimitive != nil {

		vString, err = b.bldStringPrimitive.EvaluateString(attrs)
		if err != nil {
			return nil, template.NewErrorPath("StringPrimitive", err)
		}
		r.StringPrimitive = vString

	}

	return r, template.ErrorPath{}
}

// builder struct for constructing an instance of Template.
type builder_samplecheck_Template struct {

	// builder for field stringPrimitive: string.

	bldStringPrimitive compiled.Expression
} // builder_samplecheck_Template

// Instantiates and returns a new builder for Template, based on the provided instance parameter.
func newBuilder_samplecheck_Template(
	expb lang.Compiler,
	param *samplecheck.InstanceParam) (*builder_samplecheck_Template, template.ErrorPath) {

	// If the parameter is nil. Simply return nil. The builder, then, will also return nil.
	if param == nil {
		return nil, template.ErrorPath{}
	}

	b := &builder_samplecheck_Template{}

	var exp compiled.Expression
	_ = exp
	var err error
	_ = err
	var errp template.ErrorPath
	_ = errp
	var expType istio_policy_v1beta1.ValueType
	_ = expType

	if param.StringPrimitive == "" {
		b.bldStringPrimitive = nil
	} else {
		b.bldStringPrimitive, expType, err = expb.Compile(param.StringPrimitive)
		if err != nil {
			return nil, template.NewErrorPath("StringPrimitive", err)
		}

		if expType != istio_policy_v1beta1.STRING {
			err = fmt.Errorf("instance field type mismatch: expected='%v', actual='%v', expression='%s'", istio_policy_v1beta1.STRING, expType, param.StringPrimitive)
			return nil, template.NewErrorPath("StringPrimitive", err)
		}

	}

	return b, template.ErrorPath{}
}

// build and return the instance, given a set of attributes.
func (b *builder_samplecheck_Template) build(
	attrs attribute.Bag) (*samplecheck.Instance, template.ErrorPath) {

	if b == nil {
		return nil, template.ErrorPath{}
	}

	var err error
	_ = err
	var errp template.ErrorPath
	_ = errp
	var vBool bool
	_ = vBool
	var vInt int64
	_ = vInt
	var vString string
	_ = vString
	var vDouble float64
	_ = vDouble
	var vIface interface{}
	_ = vIface

	r := &samplecheck.Instance{}

	if b.bldStringPrimitive != nil {

		vString, err = b.bldStringPrimitive.EvaluateString(attrs)
		if err != nil {
			return nil, template.NewErrorPath("StringPrimitive", err)
		}
		r.StringPrimitive = vString

	}

	return r, template.ErrorPath{}
}

// builder struct for constructing an instance of Template.
type builder_checkproducer_Template struct {

	// builder for field stringPrimitive: string.

	bldStringPrimitive compiled.Expression
} // builder_checkproducer_Template

// Instantiates and returns a new builder for Template, based on the provided instance parameter.
func newBuilder_checkproducer_Template(
	expb lang.Compiler,
	param *checkproducer.InstanceParam) (*builder_checkproducer_Template, template.ErrorPath) {

	// If the parameter is nil. Simply return nil. The builder, then, will also return nil.
	if param == nil {
		return nil, template.ErrorPath{}
	}

	b := &builder_checkproducer_Template{}

	var exp compiled.Expression
	_ = exp
	var err error
	_ = err
	var errp template.ErrorPath
	_ = errp
	var expType istio_policy_v1beta1.ValueType
	_ = expType

	if param.StringPrimitive == "" {
		b.bldStringPrimitive = nil
	} else {
		b.bldStringPrimitive, expType, err = expb.Compile(param.StringPrimitive)
		if err != nil {
			return nil, template.NewErrorPath("StringPrimitive", err)
		}

		if expType != istio_policy_v1beta1.STRING {
			err = fmt.Errorf("instance field type mismatch: expected='%v', actual='%v', expression='%s'", istio_policy_v1beta1.STRING, expType, param.StringPrimitive)
			return nil, template.NewErrorPath("StringPrimitive", err)
		}

	}

	return b, template.ErrorPath{}
}

// build and return the instance, given a set of attributes.
func (b *builder_checkproducer_Template) build(
	attrs attribute.Bag) (*checkproducer.Instance, template.ErrorPath) {

	if b == nil {
		return nil, template.ErrorPath{}
	}

	var err error
	_ = err
	var errp template.ErrorPath
	_ = errp
	var vBool bool
	_ = vBool
	var vInt int64
	_ = vInt
	var vString string
	_ = vString
	var vDouble float64
	_ = vDouble
	var vIface interface{}
	_ = vIface

	r := &checkproducer.Instance{}

	if b.bldStringPrimitive != nil {

		vString, err = b.bldStringPrimitive.EvaluateString(attrs)
		if err != nil {
			return nil, template.NewErrorPath("StringPrimitive", err)
		}
		r.StringPrimitive = vString

	}

	return r, template.ErrorPath{}
}

// builder struct for constructing an instance of Template.
type builder_samplequota_Template struct {

	// builder for field dimensions: map[string]interface{}.

	bldDimensions map[string]compiled.Expression
} // builder_samplequota_Template

// Instantiates and returns a new builder for Template, based on the provided instance parameter.
func newBuilder_samplequota_Template(
	expb lang.Compiler,
	param *samplequota.InstanceParam) (*builder_samplequota_Template, template.ErrorPath) {

	// If the parameter is nil. Simply return nil. The builder, then, will also return nil.
	if param == nil {
		return nil, template.ErrorPath{}
	}

	b := &builder_samplequota_Template{}

	var exp compiled.Expression
	_ = exp
	var err error
	_ = err
	var errp template.ErrorPath
	_ = errp
	var expType istio_policy_v1beta1.ValueType
	_ = expType

	b.bldDimensions = make(map[string]compiled.Expression, len(param.Dimensions))
	for k, v := range param.Dimensions {
		var exp compiled.Expression
		if exp, expType, err = expb.Compile(v); err != nil {
			return nil, template.NewErrorPath("Dimensions["+k+"]", err)
		}

		b.bldDimensions[k] = exp
	}

	return b, template.ErrorPath{}
}

// build and return the instance, given a set of attributes.
func (b *builder_samplequota_Template) build(
	attrs attribute.Bag) (*samplequota.Instance, template.ErrorPath) {

	if b == nil {
		return nil, template.ErrorPath{}
	}

	var err error
	_ = err
	var errp template.ErrorPath
	_ = errp
	var vBool bool
	_ = vBool
	var vInt int64
	_ = vInt
	var vString string
	_ = vString
	var vDouble float64
	_ = vDouble
	var vIface interface{}
	_ = vIface

	r := &samplequota.Instance{}

	r.Dimensions = make(map[string]interface{}, len(b.bldDimensions))

	for k, v := range b.bldDimensions {

		if vIface, err = v.Evaluate(attrs); err != nil {
			return nil, template.NewErrorPath("Dimensions["+k+"]", err)
		}

		r.Dimensions[k] = vIface

	}

	return r, template.ErrorPath{}
}

// builder struct for constructing an instance of Template.
type builder_samplereport_Template struct {

	// builder for field value: interface{}.

	bldValue compiled.Expression

	// builder for field dimensions: map[string]interface{}.

	bldDimensions map[string]compiled.Expression
} // builder_samplereport_Template

// Instantiates and returns a new builder for Template, based on the provided instance parameter.
func newBuilder_samplereport_Template(
	expb lang.Compiler,
	param *samplereport.InstanceParam) (*builder_samplereport_Template, template.ErrorPath) {

	// If the parameter is nil. Simply return nil. The builder, then, will also return nil.
	if param == nil {
		return nil, template.ErrorPath{}
	}

	b := &builder_samplereport_Template{}

	var exp compiled.Expression
	_ = exp
	var err error
	_ = err
	var errp template.ErrorPath
	_ = errp
	var expType istio_policy_v1beta1.ValueType
	_ = expType

	if param.Value == "" {
		b.bldValue = nil
	} else {
		b.bldValue, expType, err = expb.Compile(param.Value)
		if err != nil {
			return nil, template.NewErrorPath("Value", err)
		}

	}

	b.bldDimensions = make(map[string]compiled.Expression, len(param.Dimensions))
	for k, v := range param.Dimensions {
		var exp compiled.Expression
		if exp, expType, err = expb.Compile(v); err != nil {
			return nil, template.NewErrorPath("Dimensions["+k+"]", err)
		}

		b.bldDimensions[k] = exp
	}

	return b, template.ErrorPath{}
}

// build and return the instance, given a set of attributes.
func (b *builder_samplereport_Template) build(
	attrs attribute.Bag) (*samplereport.Instance, template.ErrorPath) {

	if b == nil {
		return nil, template.ErrorPath{}
	}

	var err error
	_ = err
	var errp template.ErrorPath
	_ = errp
	var vBool bool
	_ = vBool
	var vInt int64
	_ = vInt
	var vString string
	_ = vString
	var vDouble float64
	_ = vDouble
	var vIface interface{}
	_ = vIface

	r := &samplereport.Instance{}

	if b.bldValue != nil {

		if vIface, err = b.bldValue.Evaluate(attrs); err != nil {
			return nil, template.NewErrorPath("Value", err)
		}

		r.Value = vIface

	}

	r.Dimensions = make(map[string]interface{}, len(b.bldDimensions))

	for k, v := range b.bldDimensions {

		if vIface, err = v.Evaluate(attrs); err != nil {
			return nil, template.NewErrorPath("Dimensions["+k+"]", err)
		}

		r.Dimensions[k] = vIface

	}

	return r, template.ErrorPath{}
}
