// Copyright 2022 Google LLC
//
// 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
//
//     https://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.

// Code generated by protoc-gen-go_gapic. DO NOT EDIT.

package datacatalog

import (
	"context"
	"fmt"
	"math"
	"net/url"

	gax "github.com/googleapis/gax-go/v2"
	"google.golang.org/api/iterator"
	"google.golang.org/api/option"
	"google.golang.org/api/option/internaloption"
	gtransport "google.golang.org/api/transport/grpc"
	datacatalogpb "google.golang.org/genproto/googleapis/cloud/datacatalog/v1beta1"
	iampb "google.golang.org/genproto/googleapis/iam/v1"
	"google.golang.org/grpc"
	"google.golang.org/grpc/metadata"
	"google.golang.org/protobuf/proto"
)

var newPolicyTagManagerClientHook clientHook

// PolicyTagManagerCallOptions contains the retry settings for each method of PolicyTagManagerClient.
type PolicyTagManagerCallOptions struct {
	CreateTaxonomy     []gax.CallOption
	DeleteTaxonomy     []gax.CallOption
	UpdateTaxonomy     []gax.CallOption
	ListTaxonomies     []gax.CallOption
	GetTaxonomy        []gax.CallOption
	CreatePolicyTag    []gax.CallOption
	DeletePolicyTag    []gax.CallOption
	UpdatePolicyTag    []gax.CallOption
	ListPolicyTags     []gax.CallOption
	GetPolicyTag       []gax.CallOption
	GetIamPolicy       []gax.CallOption
	SetIamPolicy       []gax.CallOption
	TestIamPermissions []gax.CallOption
}

func defaultPolicyTagManagerGRPCClientOptions() []option.ClientOption {
	return []option.ClientOption{
		internaloption.WithDefaultEndpoint("datacatalog.googleapis.com:443"),
		internaloption.WithDefaultMTLSEndpoint("datacatalog.mtls.googleapis.com:443"),
		internaloption.WithDefaultAudience("https://datacatalog.googleapis.com/"),
		internaloption.WithDefaultScopes(DefaultAuthScopes()...),
		internaloption.EnableJwtWithScope(),
		option.WithGRPCDialOption(grpc.WithDefaultCallOptions(
			grpc.MaxCallRecvMsgSize(math.MaxInt32))),
	}
}

func defaultPolicyTagManagerCallOptions() *PolicyTagManagerCallOptions {
	return &PolicyTagManagerCallOptions{
		CreateTaxonomy:     []gax.CallOption{},
		DeleteTaxonomy:     []gax.CallOption{},
		UpdateTaxonomy:     []gax.CallOption{},
		ListTaxonomies:     []gax.CallOption{},
		GetTaxonomy:        []gax.CallOption{},
		CreatePolicyTag:    []gax.CallOption{},
		DeletePolicyTag:    []gax.CallOption{},
		UpdatePolicyTag:    []gax.CallOption{},
		ListPolicyTags:     []gax.CallOption{},
		GetPolicyTag:       []gax.CallOption{},
		GetIamPolicy:       []gax.CallOption{},
		SetIamPolicy:       []gax.CallOption{},
		TestIamPermissions: []gax.CallOption{},
	}
}

// internalPolicyTagManagerClient is an interface that defines the methods availaible from Google Cloud Data Catalog API.
type internalPolicyTagManagerClient interface {
	Close() error
	setGoogleClientInfo(...string)
	Connection() *grpc.ClientConn
	CreateTaxonomy(context.Context, *datacatalogpb.CreateTaxonomyRequest, ...gax.CallOption) (*datacatalogpb.Taxonomy, error)
	DeleteTaxonomy(context.Context, *datacatalogpb.DeleteTaxonomyRequest, ...gax.CallOption) error
	UpdateTaxonomy(context.Context, *datacatalogpb.UpdateTaxonomyRequest, ...gax.CallOption) (*datacatalogpb.Taxonomy, error)
	ListTaxonomies(context.Context, *datacatalogpb.ListTaxonomiesRequest, ...gax.CallOption) *TaxonomyIterator
	GetTaxonomy(context.Context, *datacatalogpb.GetTaxonomyRequest, ...gax.CallOption) (*datacatalogpb.Taxonomy, error)
	CreatePolicyTag(context.Context, *datacatalogpb.CreatePolicyTagRequest, ...gax.CallOption) (*datacatalogpb.PolicyTag, error)
	DeletePolicyTag(context.Context, *datacatalogpb.DeletePolicyTagRequest, ...gax.CallOption) error
	UpdatePolicyTag(context.Context, *datacatalogpb.UpdatePolicyTagRequest, ...gax.CallOption) (*datacatalogpb.PolicyTag, error)
	ListPolicyTags(context.Context, *datacatalogpb.ListPolicyTagsRequest, ...gax.CallOption) *PolicyTagIterator
	GetPolicyTag(context.Context, *datacatalogpb.GetPolicyTagRequest, ...gax.CallOption) (*datacatalogpb.PolicyTag, error)
	GetIamPolicy(context.Context, *iampb.GetIamPolicyRequest, ...gax.CallOption) (*iampb.Policy, error)
	SetIamPolicy(context.Context, *iampb.SetIamPolicyRequest, ...gax.CallOption) (*iampb.Policy, error)
	TestIamPermissions(context.Context, *iampb.TestIamPermissionsRequest, ...gax.CallOption) (*iampb.TestIamPermissionsResponse, error)
}

// PolicyTagManagerClient is a client for interacting with Google Cloud Data Catalog API.
// Methods, except Close, may be called concurrently. However, fields must not be modified concurrently with method calls.
//
// The policy tag manager API service allows clients to manage their taxonomies
// and policy tags.
type PolicyTagManagerClient struct {
	// The internal transport-dependent client.
	internalClient internalPolicyTagManagerClient

	// The call options for this service.
	CallOptions *PolicyTagManagerCallOptions
}

// Wrapper methods routed to the internal client.

// Close closes the connection to the API service. The user should invoke this when
// the client is no longer required.
func (c *PolicyTagManagerClient) Close() error {
	return c.internalClient.Close()
}

// setGoogleClientInfo sets the name and version of the application in
// the `x-goog-api-client` header passed on each request. Intended for
// use by Google-written clients.
func (c *PolicyTagManagerClient) setGoogleClientInfo(keyval ...string) {
	c.internalClient.setGoogleClientInfo(keyval...)
}

// Connection returns a connection to the API service.
//
// Deprecated.
func (c *PolicyTagManagerClient) Connection() *grpc.ClientConn {
	return c.internalClient.Connection()
}

// CreateTaxonomy creates a taxonomy in the specified project.
func (c *PolicyTagManagerClient) CreateTaxonomy(ctx context.Context, req *datacatalogpb.CreateTaxonomyRequest, opts ...gax.CallOption) (*datacatalogpb.Taxonomy, error) {
	return c.internalClient.CreateTaxonomy(ctx, req, opts...)
}

// DeleteTaxonomy deletes a taxonomy. This operation will also delete all
// policy tags in this taxonomy along with their associated policies.
func (c *PolicyTagManagerClient) DeleteTaxonomy(ctx context.Context, req *datacatalogpb.DeleteTaxonomyRequest, opts ...gax.CallOption) error {
	return c.internalClient.DeleteTaxonomy(ctx, req, opts...)
}

// UpdateTaxonomy updates a taxonomy.
func (c *PolicyTagManagerClient) UpdateTaxonomy(ctx context.Context, req *datacatalogpb.UpdateTaxonomyRequest, opts ...gax.CallOption) (*datacatalogpb.Taxonomy, error) {
	return c.internalClient.UpdateTaxonomy(ctx, req, opts...)
}

// ListTaxonomies lists all taxonomies in a project in a particular location that the caller
// has permission to view.
func (c *PolicyTagManagerClient) ListTaxonomies(ctx context.Context, req *datacatalogpb.ListTaxonomiesRequest, opts ...gax.CallOption) *TaxonomyIterator {
	return c.internalClient.ListTaxonomies(ctx, req, opts...)
}

// GetTaxonomy gets a taxonomy.
func (c *PolicyTagManagerClient) GetTaxonomy(ctx context.Context, req *datacatalogpb.GetTaxonomyRequest, opts ...gax.CallOption) (*datacatalogpb.Taxonomy, error) {
	return c.internalClient.GetTaxonomy(ctx, req, opts...)
}

// CreatePolicyTag creates a policy tag in the specified taxonomy.
func (c *PolicyTagManagerClient) CreatePolicyTag(ctx context.Context, req *datacatalogpb.CreatePolicyTagRequest, opts ...gax.CallOption) (*datacatalogpb.PolicyTag, error) {
	return c.internalClient.CreatePolicyTag(ctx, req, opts...)
}

// DeletePolicyTag deletes a policy tag. Also deletes all of its descendant policy tags.
func (c *PolicyTagManagerClient) DeletePolicyTag(ctx context.Context, req *datacatalogpb.DeletePolicyTagRequest, opts ...gax.CallOption) error {
	return c.internalClient.DeletePolicyTag(ctx, req, opts...)
}

// UpdatePolicyTag updates a policy tag.
func (c *PolicyTagManagerClient) UpdatePolicyTag(ctx context.Context, req *datacatalogpb.UpdatePolicyTagRequest, opts ...gax.CallOption) (*datacatalogpb.PolicyTag, error) {
	return c.internalClient.UpdatePolicyTag(ctx, req, opts...)
}

// ListPolicyTags lists all policy tags in a taxonomy.
func (c *PolicyTagManagerClient) ListPolicyTags(ctx context.Context, req *datacatalogpb.ListPolicyTagsRequest, opts ...gax.CallOption) *PolicyTagIterator {
	return c.internalClient.ListPolicyTags(ctx, req, opts...)
}

// GetPolicyTag gets a policy tag.
func (c *PolicyTagManagerClient) GetPolicyTag(ctx context.Context, req *datacatalogpb.GetPolicyTagRequest, opts ...gax.CallOption) (*datacatalogpb.PolicyTag, error) {
	return c.internalClient.GetPolicyTag(ctx, req, opts...)
}

// GetIamPolicy gets the IAM policy for a taxonomy or a policy tag.
func (c *PolicyTagManagerClient) GetIamPolicy(ctx context.Context, req *iampb.GetIamPolicyRequest, opts ...gax.CallOption) (*iampb.Policy, error) {
	return c.internalClient.GetIamPolicy(ctx, req, opts...)
}

// SetIamPolicy sets the IAM policy for a taxonomy or a policy tag.
func (c *PolicyTagManagerClient) SetIamPolicy(ctx context.Context, req *iampb.SetIamPolicyRequest, opts ...gax.CallOption) (*iampb.Policy, error) {
	return c.internalClient.SetIamPolicy(ctx, req, opts...)
}

// TestIamPermissions returns the permissions that a caller has on the specified taxonomy or
// policy tag.
func (c *PolicyTagManagerClient) TestIamPermissions(ctx context.Context, req *iampb.TestIamPermissionsRequest, opts ...gax.CallOption) (*iampb.TestIamPermissionsResponse, error) {
	return c.internalClient.TestIamPermissions(ctx, req, opts...)
}

// policyTagManagerGRPCClient is a client for interacting with Google Cloud Data Catalog API over gRPC transport.
//
// Methods, except Close, may be called concurrently. However, fields must not be modified concurrently with method calls.
type policyTagManagerGRPCClient struct {
	// Connection pool of gRPC connections to the service.
	connPool gtransport.ConnPool

	// flag to opt out of default deadlines via GOOGLE_API_GO_EXPERIMENTAL_DISABLE_DEFAULT_DEADLINE
	disableDeadlines bool

	// Points back to the CallOptions field of the containing PolicyTagManagerClient
	CallOptions **PolicyTagManagerCallOptions

	// The gRPC API client.
	policyTagManagerClient datacatalogpb.PolicyTagManagerClient

	// The x-goog-* metadata to be sent with each request.
	xGoogMetadata metadata.MD
}

// NewPolicyTagManagerClient creates a new policy tag manager client based on gRPC.
// The returned client must be Closed when it is done being used to clean up its underlying connections.
//
// The policy tag manager API service allows clients to manage their taxonomies
// and policy tags.
func NewPolicyTagManagerClient(ctx context.Context, opts ...option.ClientOption) (*PolicyTagManagerClient, error) {
	clientOpts := defaultPolicyTagManagerGRPCClientOptions()
	if newPolicyTagManagerClientHook != nil {
		hookOpts, err := newPolicyTagManagerClientHook(ctx, clientHookParams{})
		if err != nil {
			return nil, err
		}
		clientOpts = append(clientOpts, hookOpts...)
	}

	disableDeadlines, err := checkDisableDeadlines()
	if err != nil {
		return nil, err
	}

	connPool, err := gtransport.DialPool(ctx, append(clientOpts, opts...)...)
	if err != nil {
		return nil, err
	}
	client := PolicyTagManagerClient{CallOptions: defaultPolicyTagManagerCallOptions()}

	c := &policyTagManagerGRPCClient{
		connPool:               connPool,
		disableDeadlines:       disableDeadlines,
		policyTagManagerClient: datacatalogpb.NewPolicyTagManagerClient(connPool),
		CallOptions:            &client.CallOptions,
	}
	c.setGoogleClientInfo()

	client.internalClient = c

	return &client, nil
}

// Connection returns a connection to the API service.
//
// Deprecated.
func (c *policyTagManagerGRPCClient) Connection() *grpc.ClientConn {
	return c.connPool.Conn()
}

// setGoogleClientInfo sets the name and version of the application in
// the `x-goog-api-client` header passed on each request. Intended for
// use by Google-written clients.
func (c *policyTagManagerGRPCClient) setGoogleClientInfo(keyval ...string) {
	kv := append([]string{"gl-go", versionGo()}, keyval...)
	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
}

// Close closes the connection to the API service. The user should invoke this when
// the client is no longer required.
func (c *policyTagManagerGRPCClient) Close() error {
	return c.connPool.Close()
}

func (c *policyTagManagerGRPCClient) CreateTaxonomy(ctx context.Context, req *datacatalogpb.CreateTaxonomyRequest, opts ...gax.CallOption) (*datacatalogpb.Taxonomy, error) {
	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))

	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
	opts = append((*c.CallOptions).CreateTaxonomy[0:len((*c.CallOptions).CreateTaxonomy):len((*c.CallOptions).CreateTaxonomy)], opts...)
	var resp *datacatalogpb.Taxonomy
	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
		var err error
		resp, err = c.policyTagManagerClient.CreateTaxonomy(ctx, req, settings.GRPC...)
		return err
	}, opts...)
	if err != nil {
		return nil, err
	}
	return resp, nil
}

func (c *policyTagManagerGRPCClient) DeleteTaxonomy(ctx context.Context, req *datacatalogpb.DeleteTaxonomyRequest, opts ...gax.CallOption) error {
	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))

	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
	opts = append((*c.CallOptions).DeleteTaxonomy[0:len((*c.CallOptions).DeleteTaxonomy):len((*c.CallOptions).DeleteTaxonomy)], opts...)
	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
		var err error
		_, err = c.policyTagManagerClient.DeleteTaxonomy(ctx, req, settings.GRPC...)
		return err
	}, opts...)
	return err
}

func (c *policyTagManagerGRPCClient) UpdateTaxonomy(ctx context.Context, req *datacatalogpb.UpdateTaxonomyRequest, opts ...gax.CallOption) (*datacatalogpb.Taxonomy, error) {
	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "taxonomy.name", url.QueryEscape(req.GetTaxonomy().GetName())))

	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
	opts = append((*c.CallOptions).UpdateTaxonomy[0:len((*c.CallOptions).UpdateTaxonomy):len((*c.CallOptions).UpdateTaxonomy)], opts...)
	var resp *datacatalogpb.Taxonomy
	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
		var err error
		resp, err = c.policyTagManagerClient.UpdateTaxonomy(ctx, req, settings.GRPC...)
		return err
	}, opts...)
	if err != nil {
		return nil, err
	}
	return resp, nil
}

func (c *policyTagManagerGRPCClient) ListTaxonomies(ctx context.Context, req *datacatalogpb.ListTaxonomiesRequest, opts ...gax.CallOption) *TaxonomyIterator {
	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))

	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
	opts = append((*c.CallOptions).ListTaxonomies[0:len((*c.CallOptions).ListTaxonomies):len((*c.CallOptions).ListTaxonomies)], opts...)
	it := &TaxonomyIterator{}
	req = proto.Clone(req).(*datacatalogpb.ListTaxonomiesRequest)
	it.InternalFetch = func(pageSize int, pageToken string) ([]*datacatalogpb.Taxonomy, string, error) {
		resp := &datacatalogpb.ListTaxonomiesResponse{}
		if pageToken != "" {
			req.PageToken = pageToken
		}
		if pageSize > math.MaxInt32 {
			req.PageSize = math.MaxInt32
		} else if pageSize != 0 {
			req.PageSize = int32(pageSize)
		}
		err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
			var err error
			resp, err = c.policyTagManagerClient.ListTaxonomies(ctx, req, settings.GRPC...)
			return err
		}, opts...)
		if err != nil {
			return nil, "", err
		}

		it.Response = resp
		return resp.GetTaxonomies(), resp.GetNextPageToken(), nil
	}
	fetch := func(pageSize int, pageToken string) (string, error) {
		items, nextPageToken, err := it.InternalFetch(pageSize, pageToken)
		if err != nil {
			return "", err
		}
		it.items = append(it.items, items...)
		return nextPageToken, nil
	}

	it.pageInfo, it.nextFunc = iterator.NewPageInfo(fetch, it.bufLen, it.takeBuf)
	it.pageInfo.MaxSize = int(req.GetPageSize())
	it.pageInfo.Token = req.GetPageToken()

	return it
}

func (c *policyTagManagerGRPCClient) GetTaxonomy(ctx context.Context, req *datacatalogpb.GetTaxonomyRequest, opts ...gax.CallOption) (*datacatalogpb.Taxonomy, error) {
	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))

	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
	opts = append((*c.CallOptions).GetTaxonomy[0:len((*c.CallOptions).GetTaxonomy):len((*c.CallOptions).GetTaxonomy)], opts...)
	var resp *datacatalogpb.Taxonomy
	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
		var err error
		resp, err = c.policyTagManagerClient.GetTaxonomy(ctx, req, settings.GRPC...)
		return err
	}, opts...)
	if err != nil {
		return nil, err
	}
	return resp, nil
}

func (c *policyTagManagerGRPCClient) CreatePolicyTag(ctx context.Context, req *datacatalogpb.CreatePolicyTagRequest, opts ...gax.CallOption) (*datacatalogpb.PolicyTag, error) {
	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))

	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
	opts = append((*c.CallOptions).CreatePolicyTag[0:len((*c.CallOptions).CreatePolicyTag):len((*c.CallOptions).CreatePolicyTag)], opts...)
	var resp *datacatalogpb.PolicyTag
	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
		var err error
		resp, err = c.policyTagManagerClient.CreatePolicyTag(ctx, req, settings.GRPC...)
		return err
	}, opts...)
	if err != nil {
		return nil, err
	}
	return resp, nil
}

func (c *policyTagManagerGRPCClient) DeletePolicyTag(ctx context.Context, req *datacatalogpb.DeletePolicyTagRequest, opts ...gax.CallOption) error {
	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))

	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
	opts = append((*c.CallOptions).DeletePolicyTag[0:len((*c.CallOptions).DeletePolicyTag):len((*c.CallOptions).DeletePolicyTag)], opts...)
	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
		var err error
		_, err = c.policyTagManagerClient.DeletePolicyTag(ctx, req, settings.GRPC...)
		return err
	}, opts...)
	return err
}

func (c *policyTagManagerGRPCClient) UpdatePolicyTag(ctx context.Context, req *datacatalogpb.UpdatePolicyTagRequest, opts ...gax.CallOption) (*datacatalogpb.PolicyTag, error) {
	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "policy_tag.name", url.QueryEscape(req.GetPolicyTag().GetName())))

	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
	opts = append((*c.CallOptions).UpdatePolicyTag[0:len((*c.CallOptions).UpdatePolicyTag):len((*c.CallOptions).UpdatePolicyTag)], opts...)
	var resp *datacatalogpb.PolicyTag
	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
		var err error
		resp, err = c.policyTagManagerClient.UpdatePolicyTag(ctx, req, settings.GRPC...)
		return err
	}, opts...)
	if err != nil {
		return nil, err
	}
	return resp, nil
}

func (c *policyTagManagerGRPCClient) ListPolicyTags(ctx context.Context, req *datacatalogpb.ListPolicyTagsRequest, opts ...gax.CallOption) *PolicyTagIterator {
	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))

	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
	opts = append((*c.CallOptions).ListPolicyTags[0:len((*c.CallOptions).ListPolicyTags):len((*c.CallOptions).ListPolicyTags)], opts...)
	it := &PolicyTagIterator{}
	req = proto.Clone(req).(*datacatalogpb.ListPolicyTagsRequest)
	it.InternalFetch = func(pageSize int, pageToken string) ([]*datacatalogpb.PolicyTag, string, error) {
		resp := &datacatalogpb.ListPolicyTagsResponse{}
		if pageToken != "" {
			req.PageToken = pageToken
		}
		if pageSize > math.MaxInt32 {
			req.PageSize = math.MaxInt32
		} else if pageSize != 0 {
			req.PageSize = int32(pageSize)
		}
		err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
			var err error
			resp, err = c.policyTagManagerClient.ListPolicyTags(ctx, req, settings.GRPC...)
			return err
		}, opts...)
		if err != nil {
			return nil, "", err
		}

		it.Response = resp
		return resp.GetPolicyTags(), resp.GetNextPageToken(), nil
	}
	fetch := func(pageSize int, pageToken string) (string, error) {
		items, nextPageToken, err := it.InternalFetch(pageSize, pageToken)
		if err != nil {
			return "", err
		}
		it.items = append(it.items, items...)
		return nextPageToken, nil
	}

	it.pageInfo, it.nextFunc = iterator.NewPageInfo(fetch, it.bufLen, it.takeBuf)
	it.pageInfo.MaxSize = int(req.GetPageSize())
	it.pageInfo.Token = req.GetPageToken()

	return it
}

func (c *policyTagManagerGRPCClient) GetPolicyTag(ctx context.Context, req *datacatalogpb.GetPolicyTagRequest, opts ...gax.CallOption) (*datacatalogpb.PolicyTag, error) {
	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))

	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
	opts = append((*c.CallOptions).GetPolicyTag[0:len((*c.CallOptions).GetPolicyTag):len((*c.CallOptions).GetPolicyTag)], opts...)
	var resp *datacatalogpb.PolicyTag
	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
		var err error
		resp, err = c.policyTagManagerClient.GetPolicyTag(ctx, req, settings.GRPC...)
		return err
	}, opts...)
	if err != nil {
		return nil, err
	}
	return resp, nil
}

func (c *policyTagManagerGRPCClient) GetIamPolicy(ctx context.Context, req *iampb.GetIamPolicyRequest, opts ...gax.CallOption) (*iampb.Policy, error) {
	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "resource", url.QueryEscape(req.GetResource())))

	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
	opts = append((*c.CallOptions).GetIamPolicy[0:len((*c.CallOptions).GetIamPolicy):len((*c.CallOptions).GetIamPolicy)], opts...)
	var resp *iampb.Policy
	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
		var err error
		resp, err = c.policyTagManagerClient.GetIamPolicy(ctx, req, settings.GRPC...)
		return err
	}, opts...)
	if err != nil {
		return nil, err
	}
	return resp, nil
}

func (c *policyTagManagerGRPCClient) SetIamPolicy(ctx context.Context, req *iampb.SetIamPolicyRequest, opts ...gax.CallOption) (*iampb.Policy, error) {
	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "resource", url.QueryEscape(req.GetResource())))

	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
	opts = append((*c.CallOptions).SetIamPolicy[0:len((*c.CallOptions).SetIamPolicy):len((*c.CallOptions).SetIamPolicy)], opts...)
	var resp *iampb.Policy
	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
		var err error
		resp, err = c.policyTagManagerClient.SetIamPolicy(ctx, req, settings.GRPC...)
		return err
	}, opts...)
	if err != nil {
		return nil, err
	}
	return resp, nil
}

func (c *policyTagManagerGRPCClient) TestIamPermissions(ctx context.Context, req *iampb.TestIamPermissionsRequest, opts ...gax.CallOption) (*iampb.TestIamPermissionsResponse, error) {
	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "resource", url.QueryEscape(req.GetResource())))

	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
	opts = append((*c.CallOptions).TestIamPermissions[0:len((*c.CallOptions).TestIamPermissions):len((*c.CallOptions).TestIamPermissions)], opts...)
	var resp *iampb.TestIamPermissionsResponse
	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
		var err error
		resp, err = c.policyTagManagerClient.TestIamPermissions(ctx, req, settings.GRPC...)
		return err
	}, opts...)
	if err != nil {
		return nil, err
	}
	return resp, nil
}

// PolicyTagIterator manages a stream of *datacatalogpb.PolicyTag.
type PolicyTagIterator struct {
	items    []*datacatalogpb.PolicyTag
	pageInfo *iterator.PageInfo
	nextFunc func() error

	// Response is the raw response for the current page.
	// It must be cast to the RPC response type.
	// Calling Next() or InternalFetch() updates this value.
	Response interface{}

	// InternalFetch is for use by the Google Cloud Libraries only.
	// It is not part of the stable interface of this package.
	//
	// InternalFetch returns results from a single call to the underlying RPC.
	// The number of results is no greater than pageSize.
	// If there are no more results, nextPageToken is empty and err is nil.
	InternalFetch func(pageSize int, pageToken string) (results []*datacatalogpb.PolicyTag, nextPageToken string, err error)
}

// PageInfo supports pagination. See the google.golang.org/api/iterator package for details.
func (it *PolicyTagIterator) PageInfo() *iterator.PageInfo {
	return it.pageInfo
}

// Next returns the next result. Its second return value is iterator.Done if there are no more
// results. Once Next returns Done, all subsequent calls will return Done.
func (it *PolicyTagIterator) Next() (*datacatalogpb.PolicyTag, error) {
	var item *datacatalogpb.PolicyTag
	if err := it.nextFunc(); err != nil {
		return item, err
	}
	item = it.items[0]
	it.items = it.items[1:]
	return item, nil
}

func (it *PolicyTagIterator) bufLen() int {
	return len(it.items)
}

func (it *PolicyTagIterator) takeBuf() interface{} {
	b := it.items
	it.items = nil
	return b
}

// TaxonomyIterator manages a stream of *datacatalogpb.Taxonomy.
type TaxonomyIterator struct {
	items    []*datacatalogpb.Taxonomy
	pageInfo *iterator.PageInfo
	nextFunc func() error

	// Response is the raw response for the current page.
	// It must be cast to the RPC response type.
	// Calling Next() or InternalFetch() updates this value.
	Response interface{}

	// InternalFetch is for use by the Google Cloud Libraries only.
	// It is not part of the stable interface of this package.
	//
	// InternalFetch returns results from a single call to the underlying RPC.
	// The number of results is no greater than pageSize.
	// If there are no more results, nextPageToken is empty and err is nil.
	InternalFetch func(pageSize int, pageToken string) (results []*datacatalogpb.Taxonomy, nextPageToken string, err error)
}

// PageInfo supports pagination. See the google.golang.org/api/iterator package for details.
func (it *TaxonomyIterator) PageInfo() *iterator.PageInfo {
	return it.pageInfo
}

// Next returns the next result. Its second return value is iterator.Done if there are no more
// results. Once Next returns Done, all subsequent calls will return Done.
func (it *TaxonomyIterator) Next() (*datacatalogpb.Taxonomy, error) {
	var item *datacatalogpb.Taxonomy
	if err := it.nextFunc(); err != nil {
		return item, err
	}
	item = it.items[0]
	it.items = it.items[1:]
	return item, nil
}

func (it *TaxonomyIterator) bufLen() int {
	return len(it.items)
}

func (it *TaxonomyIterator) takeBuf() interface{} {
	b := it.items
	it.items = nil
	return b
}