// 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 aiplatform

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

	"cloud.google.com/go/longrunning"
	lroauto "cloud.google.com/go/longrunning/autogen"
	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"
	aiplatformpb "google.golang.org/genproto/googleapis/cloud/aiplatform/v1"
	longrunningpb "google.golang.org/genproto/googleapis/longrunning"
	"google.golang.org/grpc"
	"google.golang.org/grpc/metadata"
	"google.golang.org/protobuf/proto"
)

var newDatasetClientHook clientHook

// DatasetCallOptions contains the retry settings for each method of DatasetClient.
type DatasetCallOptions struct {
	CreateDataset     []gax.CallOption
	GetDataset        []gax.CallOption
	UpdateDataset     []gax.CallOption
	ListDatasets      []gax.CallOption
	DeleteDataset     []gax.CallOption
	ImportData        []gax.CallOption
	ExportData        []gax.CallOption
	ListDataItems     []gax.CallOption
	GetAnnotationSpec []gax.CallOption
	ListAnnotations   []gax.CallOption
}

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

func defaultDatasetCallOptions() *DatasetCallOptions {
	return &DatasetCallOptions{
		CreateDataset:     []gax.CallOption{},
		GetDataset:        []gax.CallOption{},
		UpdateDataset:     []gax.CallOption{},
		ListDatasets:      []gax.CallOption{},
		DeleteDataset:     []gax.CallOption{},
		ImportData:        []gax.CallOption{},
		ExportData:        []gax.CallOption{},
		ListDataItems:     []gax.CallOption{},
		GetAnnotationSpec: []gax.CallOption{},
		ListAnnotations:   []gax.CallOption{},
	}
}

// internalDatasetClient is an interface that defines the methods availaible from Vertex AI API.
type internalDatasetClient interface {
	Close() error
	setGoogleClientInfo(...string)
	Connection() *grpc.ClientConn
	CreateDataset(context.Context, *aiplatformpb.CreateDatasetRequest, ...gax.CallOption) (*CreateDatasetOperation, error)
	CreateDatasetOperation(name string) *CreateDatasetOperation
	GetDataset(context.Context, *aiplatformpb.GetDatasetRequest, ...gax.CallOption) (*aiplatformpb.Dataset, error)
	UpdateDataset(context.Context, *aiplatformpb.UpdateDatasetRequest, ...gax.CallOption) (*aiplatformpb.Dataset, error)
	ListDatasets(context.Context, *aiplatformpb.ListDatasetsRequest, ...gax.CallOption) *DatasetIterator
	DeleteDataset(context.Context, *aiplatformpb.DeleteDatasetRequest, ...gax.CallOption) (*DeleteDatasetOperation, error)
	DeleteDatasetOperation(name string) *DeleteDatasetOperation
	ImportData(context.Context, *aiplatformpb.ImportDataRequest, ...gax.CallOption) (*ImportDataOperation, error)
	ImportDataOperation(name string) *ImportDataOperation
	ExportData(context.Context, *aiplatformpb.ExportDataRequest, ...gax.CallOption) (*ExportDataOperation, error)
	ExportDataOperation(name string) *ExportDataOperation
	ListDataItems(context.Context, *aiplatformpb.ListDataItemsRequest, ...gax.CallOption) *DataItemIterator
	GetAnnotationSpec(context.Context, *aiplatformpb.GetAnnotationSpecRequest, ...gax.CallOption) (*aiplatformpb.AnnotationSpec, error)
	ListAnnotations(context.Context, *aiplatformpb.ListAnnotationsRequest, ...gax.CallOption) *AnnotationIterator
}

// DatasetClient is a client for interacting with Vertex AI API.
// Methods, except Close, may be called concurrently. However, fields must not be modified concurrently with method calls.
//
// The service that handles the CRUD of Vertex AI Dataset and its child
// resources.
type DatasetClient struct {
	// The internal transport-dependent client.
	internalClient internalDatasetClient

	// The call options for this service.
	CallOptions *DatasetCallOptions

	// LROClient is used internally to handle long-running operations.
	// It is exposed so that its CallOptions can be modified if required.
	// Users should not Close this client.
	LROClient *lroauto.OperationsClient
}

// 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 *DatasetClient) 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 *DatasetClient) setGoogleClientInfo(keyval ...string) {
	c.internalClient.setGoogleClientInfo(keyval...)
}

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

// CreateDataset creates a Dataset.
func (c *DatasetClient) CreateDataset(ctx context.Context, req *aiplatformpb.CreateDatasetRequest, opts ...gax.CallOption) (*CreateDatasetOperation, error) {
	return c.internalClient.CreateDataset(ctx, req, opts...)
}

// CreateDatasetOperation returns a new CreateDatasetOperation from a given name.
// The name must be that of a previously created CreateDatasetOperation, possibly from a different process.
func (c *DatasetClient) CreateDatasetOperation(name string) *CreateDatasetOperation {
	return c.internalClient.CreateDatasetOperation(name)
}

// GetDataset gets a Dataset.
func (c *DatasetClient) GetDataset(ctx context.Context, req *aiplatformpb.GetDatasetRequest, opts ...gax.CallOption) (*aiplatformpb.Dataset, error) {
	return c.internalClient.GetDataset(ctx, req, opts...)
}

// UpdateDataset updates a Dataset.
func (c *DatasetClient) UpdateDataset(ctx context.Context, req *aiplatformpb.UpdateDatasetRequest, opts ...gax.CallOption) (*aiplatformpb.Dataset, error) {
	return c.internalClient.UpdateDataset(ctx, req, opts...)
}

// ListDatasets lists Datasets in a Location.
func (c *DatasetClient) ListDatasets(ctx context.Context, req *aiplatformpb.ListDatasetsRequest, opts ...gax.CallOption) *DatasetIterator {
	return c.internalClient.ListDatasets(ctx, req, opts...)
}

// DeleteDataset deletes a Dataset.
func (c *DatasetClient) DeleteDataset(ctx context.Context, req *aiplatformpb.DeleteDatasetRequest, opts ...gax.CallOption) (*DeleteDatasetOperation, error) {
	return c.internalClient.DeleteDataset(ctx, req, opts...)
}

// DeleteDatasetOperation returns a new DeleteDatasetOperation from a given name.
// The name must be that of a previously created DeleteDatasetOperation, possibly from a different process.
func (c *DatasetClient) DeleteDatasetOperation(name string) *DeleteDatasetOperation {
	return c.internalClient.DeleteDatasetOperation(name)
}

// ImportData imports data into a Dataset.
func (c *DatasetClient) ImportData(ctx context.Context, req *aiplatformpb.ImportDataRequest, opts ...gax.CallOption) (*ImportDataOperation, error) {
	return c.internalClient.ImportData(ctx, req, opts...)
}

// ImportDataOperation returns a new ImportDataOperation from a given name.
// The name must be that of a previously created ImportDataOperation, possibly from a different process.
func (c *DatasetClient) ImportDataOperation(name string) *ImportDataOperation {
	return c.internalClient.ImportDataOperation(name)
}

// ExportData exports data from a Dataset.
func (c *DatasetClient) ExportData(ctx context.Context, req *aiplatformpb.ExportDataRequest, opts ...gax.CallOption) (*ExportDataOperation, error) {
	return c.internalClient.ExportData(ctx, req, opts...)
}

// ExportDataOperation returns a new ExportDataOperation from a given name.
// The name must be that of a previously created ExportDataOperation, possibly from a different process.
func (c *DatasetClient) ExportDataOperation(name string) *ExportDataOperation {
	return c.internalClient.ExportDataOperation(name)
}

// ListDataItems lists DataItems in a Dataset.
func (c *DatasetClient) ListDataItems(ctx context.Context, req *aiplatformpb.ListDataItemsRequest, opts ...gax.CallOption) *DataItemIterator {
	return c.internalClient.ListDataItems(ctx, req, opts...)
}

// GetAnnotationSpec gets an AnnotationSpec.
func (c *DatasetClient) GetAnnotationSpec(ctx context.Context, req *aiplatformpb.GetAnnotationSpecRequest, opts ...gax.CallOption) (*aiplatformpb.AnnotationSpec, error) {
	return c.internalClient.GetAnnotationSpec(ctx, req, opts...)
}

// ListAnnotations lists Annotations belongs to a dataitem
func (c *DatasetClient) ListAnnotations(ctx context.Context, req *aiplatformpb.ListAnnotationsRequest, opts ...gax.CallOption) *AnnotationIterator {
	return c.internalClient.ListAnnotations(ctx, req, opts...)
}

// datasetGRPCClient is a client for interacting with Vertex AI API over gRPC transport.
//
// Methods, except Close, may be called concurrently. However, fields must not be modified concurrently with method calls.
type datasetGRPCClient 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 DatasetClient
	CallOptions **DatasetCallOptions

	// The gRPC API client.
	datasetClient aiplatformpb.DatasetServiceClient

	// LROClient is used internally to handle long-running operations.
	// It is exposed so that its CallOptions can be modified if required.
	// Users should not Close this client.
	LROClient **lroauto.OperationsClient

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

// NewDatasetClient creates a new dataset service client based on gRPC.
// The returned client must be Closed when it is done being used to clean up its underlying connections.
//
// The service that handles the CRUD of Vertex AI Dataset and its child
// resources.
func NewDatasetClient(ctx context.Context, opts ...option.ClientOption) (*DatasetClient, error) {
	clientOpts := defaultDatasetGRPCClientOptions()
	if newDatasetClientHook != nil {
		hookOpts, err := newDatasetClientHook(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 := DatasetClient{CallOptions: defaultDatasetCallOptions()}

	c := &datasetGRPCClient{
		connPool:         connPool,
		disableDeadlines: disableDeadlines,
		datasetClient:    aiplatformpb.NewDatasetServiceClient(connPool),
		CallOptions:      &client.CallOptions,
	}
	c.setGoogleClientInfo()

	client.internalClient = c

	client.LROClient, err = lroauto.NewOperationsClient(ctx, gtransport.WithConnPool(connPool))
	if err != nil {
		// This error "should not happen", since we are just reusing old connection pool
		// and never actually need to dial.
		// If this does happen, we could leak connp. However, we cannot close conn:
		// If the user invoked the constructor with option.WithGRPCConn,
		// we would close a connection that's still in use.
		// TODO: investigate error conditions.
		return nil, err
	}
	c.LROClient = &client.LROClient
	return &client, nil
}

// Connection returns a connection to the API service.
//
// Deprecated.
func (c *datasetGRPCClient) 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 *datasetGRPCClient) 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 *datasetGRPCClient) Close() error {
	return c.connPool.Close()
}

func (c *datasetGRPCClient) CreateDataset(ctx context.Context, req *aiplatformpb.CreateDatasetRequest, opts ...gax.CallOption) (*CreateDatasetOperation, 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).CreateDataset[0:len((*c.CallOptions).CreateDataset):len((*c.CallOptions).CreateDataset)], opts...)
	var resp *longrunningpb.Operation
	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
		var err error
		resp, err = c.datasetClient.CreateDataset(ctx, req, settings.GRPC...)
		return err
	}, opts...)
	if err != nil {
		return nil, err
	}
	return &CreateDatasetOperation{
		lro: longrunning.InternalNewOperation(*c.LROClient, resp),
	}, nil
}

func (c *datasetGRPCClient) GetDataset(ctx context.Context, req *aiplatformpb.GetDatasetRequest, opts ...gax.CallOption) (*aiplatformpb.Dataset, 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).GetDataset[0:len((*c.CallOptions).GetDataset):len((*c.CallOptions).GetDataset)], opts...)
	var resp *aiplatformpb.Dataset
	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
		var err error
		resp, err = c.datasetClient.GetDataset(ctx, req, settings.GRPC...)
		return err
	}, opts...)
	if err != nil {
		return nil, err
	}
	return resp, nil
}

func (c *datasetGRPCClient) UpdateDataset(ctx context.Context, req *aiplatformpb.UpdateDatasetRequest, opts ...gax.CallOption) (*aiplatformpb.Dataset, error) {
	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "dataset.name", url.QueryEscape(req.GetDataset().GetName())))

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

func (c *datasetGRPCClient) ListDatasets(ctx context.Context, req *aiplatformpb.ListDatasetsRequest, opts ...gax.CallOption) *DatasetIterator {
	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).ListDatasets[0:len((*c.CallOptions).ListDatasets):len((*c.CallOptions).ListDatasets)], opts...)
	it := &DatasetIterator{}
	req = proto.Clone(req).(*aiplatformpb.ListDatasetsRequest)
	it.InternalFetch = func(pageSize int, pageToken string) ([]*aiplatformpb.Dataset, string, error) {
		resp := &aiplatformpb.ListDatasetsResponse{}
		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.datasetClient.ListDatasets(ctx, req, settings.GRPC...)
			return err
		}, opts...)
		if err != nil {
			return nil, "", err
		}

		it.Response = resp
		return resp.GetDatasets(), 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 *datasetGRPCClient) DeleteDataset(ctx context.Context, req *aiplatformpb.DeleteDatasetRequest, opts ...gax.CallOption) (*DeleteDatasetOperation, 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).DeleteDataset[0:len((*c.CallOptions).DeleteDataset):len((*c.CallOptions).DeleteDataset)], opts...)
	var resp *longrunningpb.Operation
	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
		var err error
		resp, err = c.datasetClient.DeleteDataset(ctx, req, settings.GRPC...)
		return err
	}, opts...)
	if err != nil {
		return nil, err
	}
	return &DeleteDatasetOperation{
		lro: longrunning.InternalNewOperation(*c.LROClient, resp),
	}, nil
}

func (c *datasetGRPCClient) ImportData(ctx context.Context, req *aiplatformpb.ImportDataRequest, opts ...gax.CallOption) (*ImportDataOperation, 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).ImportData[0:len((*c.CallOptions).ImportData):len((*c.CallOptions).ImportData)], opts...)
	var resp *longrunningpb.Operation
	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
		var err error
		resp, err = c.datasetClient.ImportData(ctx, req, settings.GRPC...)
		return err
	}, opts...)
	if err != nil {
		return nil, err
	}
	return &ImportDataOperation{
		lro: longrunning.InternalNewOperation(*c.LROClient, resp),
	}, nil
}

func (c *datasetGRPCClient) ExportData(ctx context.Context, req *aiplatformpb.ExportDataRequest, opts ...gax.CallOption) (*ExportDataOperation, 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).ExportData[0:len((*c.CallOptions).ExportData):len((*c.CallOptions).ExportData)], opts...)
	var resp *longrunningpb.Operation
	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
		var err error
		resp, err = c.datasetClient.ExportData(ctx, req, settings.GRPC...)
		return err
	}, opts...)
	if err != nil {
		return nil, err
	}
	return &ExportDataOperation{
		lro: longrunning.InternalNewOperation(*c.LROClient, resp),
	}, nil
}

func (c *datasetGRPCClient) ListDataItems(ctx context.Context, req *aiplatformpb.ListDataItemsRequest, opts ...gax.CallOption) *DataItemIterator {
	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).ListDataItems[0:len((*c.CallOptions).ListDataItems):len((*c.CallOptions).ListDataItems)], opts...)
	it := &DataItemIterator{}
	req = proto.Clone(req).(*aiplatformpb.ListDataItemsRequest)
	it.InternalFetch = func(pageSize int, pageToken string) ([]*aiplatformpb.DataItem, string, error) {
		resp := &aiplatformpb.ListDataItemsResponse{}
		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.datasetClient.ListDataItems(ctx, req, settings.GRPC...)
			return err
		}, opts...)
		if err != nil {
			return nil, "", err
		}

		it.Response = resp
		return resp.GetDataItems(), 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 *datasetGRPCClient) GetAnnotationSpec(ctx context.Context, req *aiplatformpb.GetAnnotationSpecRequest, opts ...gax.CallOption) (*aiplatformpb.AnnotationSpec, 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).GetAnnotationSpec[0:len((*c.CallOptions).GetAnnotationSpec):len((*c.CallOptions).GetAnnotationSpec)], opts...)
	var resp *aiplatformpb.AnnotationSpec
	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
		var err error
		resp, err = c.datasetClient.GetAnnotationSpec(ctx, req, settings.GRPC...)
		return err
	}, opts...)
	if err != nil {
		return nil, err
	}
	return resp, nil
}

func (c *datasetGRPCClient) ListAnnotations(ctx context.Context, req *aiplatformpb.ListAnnotationsRequest, opts ...gax.CallOption) *AnnotationIterator {
	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).ListAnnotations[0:len((*c.CallOptions).ListAnnotations):len((*c.CallOptions).ListAnnotations)], opts...)
	it := &AnnotationIterator{}
	req = proto.Clone(req).(*aiplatformpb.ListAnnotationsRequest)
	it.InternalFetch = func(pageSize int, pageToken string) ([]*aiplatformpb.Annotation, string, error) {
		resp := &aiplatformpb.ListAnnotationsResponse{}
		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.datasetClient.ListAnnotations(ctx, req, settings.GRPC...)
			return err
		}, opts...)
		if err != nil {
			return nil, "", err
		}

		it.Response = resp
		return resp.GetAnnotations(), 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
}

// CreateDatasetOperation manages a long-running operation from CreateDataset.
type CreateDatasetOperation struct {
	lro *longrunning.Operation
}

// CreateDatasetOperation returns a new CreateDatasetOperation from a given name.
// The name must be that of a previously created CreateDatasetOperation, possibly from a different process.
func (c *datasetGRPCClient) CreateDatasetOperation(name string) *CreateDatasetOperation {
	return &CreateDatasetOperation{
		lro: longrunning.InternalNewOperation(*c.LROClient, &longrunningpb.Operation{Name: name}),
	}
}

// Wait blocks until the long-running operation is completed, returning the response and any errors encountered.
//
// See documentation of Poll for error-handling information.
func (op *CreateDatasetOperation) Wait(ctx context.Context, opts ...gax.CallOption) (*aiplatformpb.Dataset, error) {
	var resp aiplatformpb.Dataset
	if err := op.lro.WaitWithInterval(ctx, &resp, time.Minute, opts...); err != nil {
		return nil, err
	}
	return &resp, nil
}

// Poll fetches the latest state of the long-running operation.
//
// Poll also fetches the latest metadata, which can be retrieved by Metadata.
//
// If Poll fails, the error is returned and op is unmodified. If Poll succeeds and
// the operation has completed with failure, the error is returned and op.Done will return true.
// If Poll succeeds and the operation has completed successfully,
// op.Done will return true, and the response of the operation is returned.
// If Poll succeeds and the operation has not completed, the returned response and error are both nil.
func (op *CreateDatasetOperation) Poll(ctx context.Context, opts ...gax.CallOption) (*aiplatformpb.Dataset, error) {
	var resp aiplatformpb.Dataset
	if err := op.lro.Poll(ctx, &resp, opts...); err != nil {
		return nil, err
	}
	if !op.Done() {
		return nil, nil
	}
	return &resp, nil
}

// Metadata returns metadata associated with the long-running operation.
// Metadata itself does not contact the server, but Poll does.
// To get the latest metadata, call this method after a successful call to Poll.
// If the metadata is not available, the returned metadata and error are both nil.
func (op *CreateDatasetOperation) Metadata() (*aiplatformpb.CreateDatasetOperationMetadata, error) {
	var meta aiplatformpb.CreateDatasetOperationMetadata
	if err := op.lro.Metadata(&meta); err == longrunning.ErrNoMetadata {
		return nil, nil
	} else if err != nil {
		return nil, err
	}
	return &meta, nil
}

// Done reports whether the long-running operation has completed.
func (op *CreateDatasetOperation) Done() bool {
	return op.lro.Done()
}

// Name returns the name of the long-running operation.
// The name is assigned by the server and is unique within the service from which the operation is created.
func (op *CreateDatasetOperation) Name() string {
	return op.lro.Name()
}

// DeleteDatasetOperation manages a long-running operation from DeleteDataset.
type DeleteDatasetOperation struct {
	lro *longrunning.Operation
}

// DeleteDatasetOperation returns a new DeleteDatasetOperation from a given name.
// The name must be that of a previously created DeleteDatasetOperation, possibly from a different process.
func (c *datasetGRPCClient) DeleteDatasetOperation(name string) *DeleteDatasetOperation {
	return &DeleteDatasetOperation{
		lro: longrunning.InternalNewOperation(*c.LROClient, &longrunningpb.Operation{Name: name}),
	}
}

// Wait blocks until the long-running operation is completed, returning the response and any errors encountered.
//
// See documentation of Poll for error-handling information.
func (op *DeleteDatasetOperation) Wait(ctx context.Context, opts ...gax.CallOption) error {
	return op.lro.WaitWithInterval(ctx, nil, time.Minute, opts...)
}

// Poll fetches the latest state of the long-running operation.
//
// Poll also fetches the latest metadata, which can be retrieved by Metadata.
//
// If Poll fails, the error is returned and op is unmodified. If Poll succeeds and
// the operation has completed with failure, the error is returned and op.Done will return true.
// If Poll succeeds and the operation has completed successfully,
// op.Done will return true, and the response of the operation is returned.
// If Poll succeeds and the operation has not completed, the returned response and error are both nil.
func (op *DeleteDatasetOperation) Poll(ctx context.Context, opts ...gax.CallOption) error {
	return op.lro.Poll(ctx, nil, opts...)
}

// Metadata returns metadata associated with the long-running operation.
// Metadata itself does not contact the server, but Poll does.
// To get the latest metadata, call this method after a successful call to Poll.
// If the metadata is not available, the returned metadata and error are both nil.
func (op *DeleteDatasetOperation) Metadata() (*aiplatformpb.DeleteOperationMetadata, error) {
	var meta aiplatformpb.DeleteOperationMetadata
	if err := op.lro.Metadata(&meta); err == longrunning.ErrNoMetadata {
		return nil, nil
	} else if err != nil {
		return nil, err
	}
	return &meta, nil
}

// Done reports whether the long-running operation has completed.
func (op *DeleteDatasetOperation) Done() bool {
	return op.lro.Done()
}

// Name returns the name of the long-running operation.
// The name is assigned by the server and is unique within the service from which the operation is created.
func (op *DeleteDatasetOperation) Name() string {
	return op.lro.Name()
}

// ExportDataOperation manages a long-running operation from ExportData.
type ExportDataOperation struct {
	lro *longrunning.Operation
}

// ExportDataOperation returns a new ExportDataOperation from a given name.
// The name must be that of a previously created ExportDataOperation, possibly from a different process.
func (c *datasetGRPCClient) ExportDataOperation(name string) *ExportDataOperation {
	return &ExportDataOperation{
		lro: longrunning.InternalNewOperation(*c.LROClient, &longrunningpb.Operation{Name: name}),
	}
}

// Wait blocks until the long-running operation is completed, returning the response and any errors encountered.
//
// See documentation of Poll for error-handling information.
func (op *ExportDataOperation) Wait(ctx context.Context, opts ...gax.CallOption) (*aiplatformpb.ExportDataResponse, error) {
	var resp aiplatformpb.ExportDataResponse
	if err := op.lro.WaitWithInterval(ctx, &resp, time.Minute, opts...); err != nil {
		return nil, err
	}
	return &resp, nil
}

// Poll fetches the latest state of the long-running operation.
//
// Poll also fetches the latest metadata, which can be retrieved by Metadata.
//
// If Poll fails, the error is returned and op is unmodified. If Poll succeeds and
// the operation has completed with failure, the error is returned and op.Done will return true.
// If Poll succeeds and the operation has completed successfully,
// op.Done will return true, and the response of the operation is returned.
// If Poll succeeds and the operation has not completed, the returned response and error are both nil.
func (op *ExportDataOperation) Poll(ctx context.Context, opts ...gax.CallOption) (*aiplatformpb.ExportDataResponse, error) {
	var resp aiplatformpb.ExportDataResponse
	if err := op.lro.Poll(ctx, &resp, opts...); err != nil {
		return nil, err
	}
	if !op.Done() {
		return nil, nil
	}
	return &resp, nil
}

// Metadata returns metadata associated with the long-running operation.
// Metadata itself does not contact the server, but Poll does.
// To get the latest metadata, call this method after a successful call to Poll.
// If the metadata is not available, the returned metadata and error are both nil.
func (op *ExportDataOperation) Metadata() (*aiplatformpb.ExportDataOperationMetadata, error) {
	var meta aiplatformpb.ExportDataOperationMetadata
	if err := op.lro.Metadata(&meta); err == longrunning.ErrNoMetadata {
		return nil, nil
	} else if err != nil {
		return nil, err
	}
	return &meta, nil
}

// Done reports whether the long-running operation has completed.
func (op *ExportDataOperation) Done() bool {
	return op.lro.Done()
}

// Name returns the name of the long-running operation.
// The name is assigned by the server and is unique within the service from which the operation is created.
func (op *ExportDataOperation) Name() string {
	return op.lro.Name()
}

// ImportDataOperation manages a long-running operation from ImportData.
type ImportDataOperation struct {
	lro *longrunning.Operation
}

// ImportDataOperation returns a new ImportDataOperation from a given name.
// The name must be that of a previously created ImportDataOperation, possibly from a different process.
func (c *datasetGRPCClient) ImportDataOperation(name string) *ImportDataOperation {
	return &ImportDataOperation{
		lro: longrunning.InternalNewOperation(*c.LROClient, &longrunningpb.Operation{Name: name}),
	}
}

// Wait blocks until the long-running operation is completed, returning the response and any errors encountered.
//
// See documentation of Poll for error-handling information.
func (op *ImportDataOperation) Wait(ctx context.Context, opts ...gax.CallOption) (*aiplatformpb.ImportDataResponse, error) {
	var resp aiplatformpb.ImportDataResponse
	if err := op.lro.WaitWithInterval(ctx, &resp, time.Minute, opts...); err != nil {
		return nil, err
	}
	return &resp, nil
}

// Poll fetches the latest state of the long-running operation.
//
// Poll also fetches the latest metadata, which can be retrieved by Metadata.
//
// If Poll fails, the error is returned and op is unmodified. If Poll succeeds and
// the operation has completed with failure, the error is returned and op.Done will return true.
// If Poll succeeds and the operation has completed successfully,
// op.Done will return true, and the response of the operation is returned.
// If Poll succeeds and the operation has not completed, the returned response and error are both nil.
func (op *ImportDataOperation) Poll(ctx context.Context, opts ...gax.CallOption) (*aiplatformpb.ImportDataResponse, error) {
	var resp aiplatformpb.ImportDataResponse
	if err := op.lro.Poll(ctx, &resp, opts...); err != nil {
		return nil, err
	}
	if !op.Done() {
		return nil, nil
	}
	return &resp, nil
}

// Metadata returns metadata associated with the long-running operation.
// Metadata itself does not contact the server, but Poll does.
// To get the latest metadata, call this method after a successful call to Poll.
// If the metadata is not available, the returned metadata and error are both nil.
func (op *ImportDataOperation) Metadata() (*aiplatformpb.ImportDataOperationMetadata, error) {
	var meta aiplatformpb.ImportDataOperationMetadata
	if err := op.lro.Metadata(&meta); err == longrunning.ErrNoMetadata {
		return nil, nil
	} else if err != nil {
		return nil, err
	}
	return &meta, nil
}

// Done reports whether the long-running operation has completed.
func (op *ImportDataOperation) Done() bool {
	return op.lro.Done()
}

// Name returns the name of the long-running operation.
// The name is assigned by the server and is unique within the service from which the operation is created.
func (op *ImportDataOperation) Name() string {
	return op.lro.Name()
}

// AnnotationIterator manages a stream of *aiplatformpb.Annotation.
type AnnotationIterator struct {
	items    []*aiplatformpb.Annotation
	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 []*aiplatformpb.Annotation, nextPageToken string, err error)
}

// PageInfo supports pagination. See the google.golang.org/api/iterator package for details.
func (it *AnnotationIterator) 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 *AnnotationIterator) Next() (*aiplatformpb.Annotation, error) {
	var item *aiplatformpb.Annotation
	if err := it.nextFunc(); err != nil {
		return item, err
	}
	item = it.items[0]
	it.items = it.items[1:]
	return item, nil
}

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

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

// DataItemIterator manages a stream of *aiplatformpb.DataItem.
type DataItemIterator struct {
	items    []*aiplatformpb.DataItem
	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 []*aiplatformpb.DataItem, nextPageToken string, err error)
}

// PageInfo supports pagination. See the google.golang.org/api/iterator package for details.
func (it *DataItemIterator) 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 *DataItemIterator) Next() (*aiplatformpb.DataItem, error) {
	var item *aiplatformpb.DataItem
	if err := it.nextFunc(); err != nil {
		return item, err
	}
	item = it.items[0]
	it.items = it.items[1:]
	return item, nil
}

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

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

// DatasetIterator manages a stream of *aiplatformpb.Dataset.
type DatasetIterator struct {
	items    []*aiplatformpb.Dataset
	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 []*aiplatformpb.Dataset, nextPageToken string, err error)
}

// PageInfo supports pagination. See the google.golang.org/api/iterator package for details.
func (it *DatasetIterator) 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 *DatasetIterator) Next() (*aiplatformpb.Dataset, error) {
	var item *aiplatformpb.Dataset
	if err := it.nextFunc(); err != nil {
		return item, err
	}
	item = it.items[0]
	it.items = it.items[1:]
	return item, nil
}

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

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