api_op_DetectEntities.go

// Code generated by smithy-go-codegen DO NOT EDIT.

package comprehend

import (
	"context"
	"errors"
	"fmt"
	"github.com/aws/aws-sdk-go-v2/aws"
	awsmiddleware "github.com/aws/aws-sdk-go-v2/aws/middleware"
	"github.com/aws/aws-sdk-go-v2/aws/signer/v4"
	internalauth "github.com/aws/aws-sdk-go-v2/internal/auth"
	"github.com/aws/aws-sdk-go-v2/service/comprehend/types"
	smithyendpoints "github.com/aws/smithy-go/endpoints"
	"github.com/aws/smithy-go/middleware"
	smithyhttp "github.com/aws/smithy-go/transport/http"
)

// Detects named entities in input text when you use the pre-trained model.
// Detects custom entities if you have a custom entity recognition model. When
// detecting named entities using the pre-trained model, use plain text as the
// input. For more information about named entities, see Entities (https://docs.aws.amazon.com/comprehend/latest/dg/how-entities.html)
// in the Comprehend Developer Guide. When you use a custom entity recognition
// model, you can input plain text or you can upload a single-page input document
// (text, PDF, Word, or image). If the system detects errors while processing a
// page in the input document, the API response includes an entry in Errors for
// each error. If the system detects a document-level error in your input document,
// the API returns an InvalidRequestException error response. For details about
// this exception, see Errors in semi-structured documents (https://docs.aws.amazon.com/comprehend/latest/dg/idp-inputs-sync-err.html)
// in the Comprehend Developer Guide.
func (c *Client) DetectEntities(ctx context.Context, params *DetectEntitiesInput, optFns ...func(*Options)) (*DetectEntitiesOutput, error) {
	if params == nil {
		params = &DetectEntitiesInput{}
	}

	result, metadata, err := c.invokeOperation(ctx, "DetectEntities", params, optFns, c.addOperationDetectEntitiesMiddlewares)
	if err != nil {
		return nil, err
	}

	out := result.(*DetectEntitiesOutput)
	out.ResultMetadata = metadata
	return out, nil
}

type DetectEntitiesInput struct {

	// This field applies only when you use a custom entity recognition model that was
	// trained with PDF annotations. For other cases, enter your text input in the Text
	// field. Use the Bytes parameter to input a text, PDF, Word or image file. Using
	// a plain-text file in the Bytes parameter is equivelent to using the Text
	// parameter (the Entities field in the response is identical). You can also use
	// the Bytes parameter to input an Amazon Textract DetectDocumentText or
	// AnalyzeDocument output file. Provide the input document as a sequence of
	// base64-encoded bytes. If your code uses an Amazon Web Services SDK to detect
	// entities, the SDK may encode the document file bytes for you. The maximum length
	// of this field depends on the input document type. For details, see Inputs for
	// real-time custom analysis (https://docs.aws.amazon.com/comprehend/latest/dg/idp-inputs-sync.html)
	// in the Comprehend Developer Guide. If you use the Bytes parameter, do not use
	// the Text parameter.
	Bytes []byte

	// Provides configuration parameters to override the default actions for
	// extracting text from PDF documents and image files.
	DocumentReaderConfig *types.DocumentReaderConfig

	// The Amazon Resource Name of an endpoint that is associated with a custom entity
	// recognition model. Provide an endpoint if you want to detect entities by using
	// your own custom model instead of the default model that is used by Amazon
	// Comprehend. If you specify an endpoint, Amazon Comprehend uses the language of
	// your custom model, and it ignores any language code that you provide in your
	// request. For information about endpoints, see Managing endpoints (https://docs.aws.amazon.com/comprehend/latest/dg/manage-endpoints.html)
	// .
	EndpointArn *string

	// The language of the input documents. You can specify any of the primary
	// languages supported by Amazon Comprehend. If your request includes the endpoint
	// for a custom entity recognition model, Amazon Comprehend uses the language of
	// your custom model, and it ignores any language code that you specify here. All
	// input documents must be in the same language.
	LanguageCode types.LanguageCode

	// A UTF-8 text string. The maximum string size is 100 KB. If you enter text using
	// this parameter, do not use the Bytes parameter.
	Text *string

	noSmithyDocumentSerde
}

type DetectEntitiesOutput struct {

	// Information about each block of text in the input document. Blocks are nested.
	// A page block contains a block for each line of text, which contains a block for
	// each word. The Block content for a Word input document does not include a
	// Geometry field. The Block field is not present in the response for plain-text
	// inputs.
	Blocks []types.Block

	// Information about the document, discovered during text extraction. This field
	// is present in the response only if your request used the Byte parameter.
	DocumentMetadata *types.DocumentMetadata

	// The document type for each page in the input document. This field is present in
	// the response only if your request used the Byte parameter.
	DocumentType []types.DocumentTypeListItem

	// A collection of entities identified in the input text. For each entity, the
	// response provides the entity text, entity type, where the entity text begins and
	// ends, and the level of confidence that Amazon Comprehend has in the detection.
	// If your request uses a custom entity recognition model, Amazon Comprehend
	// detects the entities that the model is trained to recognize. Otherwise, it
	// detects the default entity types. For a list of default entity types, see
	// Entities (https://docs.aws.amazon.com/comprehend/latest/dg/how-entities.html) in
	// the Comprehend Developer Guide.
	Entities []types.Entity

	// Page-level errors that the system detected while processing the input document.
	// The field is empty if the system encountered no errors.
	Errors []types.ErrorsListItem

	// Metadata pertaining to the operation's result.
	ResultMetadata middleware.Metadata

	noSmithyDocumentSerde
}

func (c *Client) addOperationDetectEntitiesMiddlewares(stack *middleware.Stack, options Options) (err error) {
	err = stack.Serialize.Add(&awsAwsjson11_serializeOpDetectEntities{}, middleware.After)
	if err != nil {
		return err
	}
	err = stack.Deserialize.Add(&awsAwsjson11_deserializeOpDetectEntities{}, middleware.After)
	if err != nil {
		return err
	}
	if err = addlegacyEndpointContextSetter(stack, options); err != nil {
		return err
	}
	if err = addSetLoggerMiddleware(stack, options); err != nil {
		return err
	}
	if err = awsmiddleware.AddClientRequestIDMiddleware(stack); err != nil {
		return err
	}
	if err = smithyhttp.AddComputeContentLengthMiddleware(stack); err != nil {
		return err
	}
	if err = addResolveEndpointMiddleware(stack, options); err != nil {
		return err
	}
	if err = v4.AddComputePayloadSHA256Middleware(stack); err != nil {
		return err
	}
	if err = addRetryMiddlewares(stack, options); err != nil {
		return err
	}
	if err = addHTTPSignerV4Middleware(stack, options); err != nil {
		return err
	}
	if err = awsmiddleware.AddRawResponseToMetadata(stack); err != nil {
		return err
	}
	if err = awsmiddleware.AddRecordResponseTiming(stack); err != nil {
		return err
	}
	if err = addClientUserAgent(stack, options); err != nil {
		return err
	}
	if err = smithyhttp.AddErrorCloseResponseBodyMiddleware(stack); err != nil {
		return err
	}
	if err = smithyhttp.AddCloseResponseBodyMiddleware(stack); err != nil {
		return err
	}
	if err = addDetectEntitiesResolveEndpointMiddleware(stack, options); err != nil {
		return err
	}
	if err = addOpDetectEntitiesValidationMiddleware(stack); err != nil {
		return err
	}
	if err = stack.Initialize.Add(newServiceMetadataMiddleware_opDetectEntities(options.Region), middleware.Before); err != nil {
		return err
	}
	if err = awsmiddleware.AddRecursionDetection(stack); err != nil {
		return err
	}
	if err = addRequestIDRetrieverMiddleware(stack); err != nil {
		return err
	}
	if err = addResponseErrorMiddleware(stack); err != nil {
		return err
	}
	if err = addRequestResponseLogging(stack, options); err != nil {
		return err
	}
	if err = addendpointDisableHTTPSMiddleware(stack, options); err != nil {
		return err
	}
	return nil
}

func newServiceMetadataMiddleware_opDetectEntities(region string) *awsmiddleware.RegisterServiceMetadata {
	return &awsmiddleware.RegisterServiceMetadata{
		Region:        region,
		ServiceID:     ServiceID,
		SigningName:   "comprehend",
		OperationName: "DetectEntities",
	}
}

type opDetectEntitiesResolveEndpointMiddleware struct {
	EndpointResolver EndpointResolverV2
	BuiltInResolver  builtInParameterResolver
}

func (*opDetectEntitiesResolveEndpointMiddleware) ID() string {
	return "ResolveEndpointV2"
}

func (m *opDetectEntitiesResolveEndpointMiddleware) HandleSerialize(ctx context.Context, in middleware.SerializeInput, next middleware.SerializeHandler) (
	out middleware.SerializeOutput, metadata middleware.Metadata, err error,
) {
	if awsmiddleware.GetRequiresLegacyEndpoints(ctx) {
		return next.HandleSerialize(ctx, in)
	}

	req, ok := in.Request.(*smithyhttp.Request)
	if !ok {
		return out, metadata, fmt.Errorf("unknown transport type %T", in.Request)
	}

	if m.EndpointResolver == nil {
		return out, metadata, fmt.Errorf("expected endpoint resolver to not be nil")
	}

	params := EndpointParameters{}

	m.BuiltInResolver.ResolveBuiltIns(&params)

	var resolvedEndpoint smithyendpoints.Endpoint
	resolvedEndpoint, err = m.EndpointResolver.ResolveEndpoint(ctx, params)
	if err != nil {
		return out, metadata, fmt.Errorf("failed to resolve service endpoint, %w", err)
	}

	req.URL = &resolvedEndpoint.URI

	for k := range resolvedEndpoint.Headers {
		req.Header.Set(
			k,
			resolvedEndpoint.Headers.Get(k),
		)
	}

	authSchemes, err := internalauth.GetAuthenticationSchemes(&resolvedEndpoint.Properties)
	if err != nil {
		var nfe *internalauth.NoAuthenticationSchemesFoundError
		if errors.As(err, &nfe) {
			// if no auth scheme is found, default to sigv4
			signingName := "comprehend"
			signingRegion := m.BuiltInResolver.(*builtInResolver).Region
			ctx = awsmiddleware.SetSigningName(ctx, signingName)
			ctx = awsmiddleware.SetSigningRegion(ctx, signingRegion)

		}
		var ue *internalauth.UnSupportedAuthenticationSchemeSpecifiedError
		if errors.As(err, &ue) {
			return out, metadata, fmt.Errorf(
				"This operation requests signer version(s) %v but the client only supports %v",
				ue.UnsupportedSchemes,
				internalauth.SupportedSchemes,
			)
		}
	}

	for _, authScheme := range authSchemes {
		switch authScheme.(type) {
		case *internalauth.AuthenticationSchemeV4:
			v4Scheme, _ := authScheme.(*internalauth.AuthenticationSchemeV4)
			var signingName, signingRegion string
			if v4Scheme.SigningName == nil {
				signingName = "comprehend"
			} else {
				signingName = *v4Scheme.SigningName
			}
			if v4Scheme.SigningRegion == nil {
				signingRegion = m.BuiltInResolver.(*builtInResolver).Region
			} else {
				signingRegion = *v4Scheme.SigningRegion
			}
			if v4Scheme.DisableDoubleEncoding != nil {
				// The signer sets an equivalent value at client initialization time.
				// Setting this context value will cause the signer to extract it
				// and override the value set at client initialization time.
				ctx = internalauth.SetDisableDoubleEncoding(ctx, *v4Scheme.DisableDoubleEncoding)
			}
			ctx = awsmiddleware.SetSigningName(ctx, signingName)
			ctx = awsmiddleware.SetSigningRegion(ctx, signingRegion)
			break
		case *internalauth.AuthenticationSchemeV4A:
			v4aScheme, _ := authScheme.(*internalauth.AuthenticationSchemeV4A)
			if v4aScheme.SigningName == nil {
				v4aScheme.SigningName = aws.String("comprehend")
			}
			if v4aScheme.DisableDoubleEncoding != nil {
				// The signer sets an equivalent value at client initialization time.
				// Setting this context value will cause the signer to extract it
				// and override the value set at client initialization time.
				ctx = internalauth.SetDisableDoubleEncoding(ctx, *v4aScheme.DisableDoubleEncoding)
			}
			ctx = awsmiddleware.SetSigningName(ctx, *v4aScheme.SigningName)
			ctx = awsmiddleware.SetSigningRegion(ctx, v4aScheme.SigningRegionSet[0])
			break
		case *internalauth.AuthenticationSchemeNone:
			break
		}
	}

	return next.HandleSerialize(ctx, in)
}

func addDetectEntitiesResolveEndpointMiddleware(stack *middleware.Stack, options Options) error {
	return stack.Serialize.Insert(&opDetectEntitiesResolveEndpointMiddleware{
		EndpointResolver: options.EndpointResolverV2,
		BuiltInResolver: &builtInResolver{
			Region:       options.Region,
			UseDualStack: options.EndpointOptions.UseDualStackEndpoint,
			UseFIPS:      options.EndpointOptions.UseFIPSEndpoint,
			Endpoint:     options.BaseEndpoint,
		},
	}, "ResolveEndpoint", middleware.After)
}