public Graph LoadExampleGraph(string uri)
{
Graph loadGraph = new Graph();
connector.LoadGraph(loadGraph, UriFactory.Create(uri));
return(loadGraph);
}
/// <summary>
/// This method is called for every Lambda invocation. This method takes in an S3 event object and can be used
/// to respond to S3 notifications.
/// </summary>
/// <param name="s3Event"></param>
/// <param name="context"></param>
/// <returns></returns>
public async Task FunctionHandler(S3Event s3Event, ILambdaContext context)
{
foreach (var record in s3Event.Records)
{
try
{
using (GetObjectResponse response = await _s3Client.GetObjectAsync(new GetObjectRequest()
{
BucketName = record.S3.Bucket.Name,
Key = record.S3.Object.Key
}))
{
using (StreamReader reader = new StreamReader(response.ResponseStream))
{
//
// get text detail
//
var textDetail = JsonConvert.DeserializeObject <TextDetail>(await reader.ReadToEndAsync());
//
// load selfies graph
//
IGraph textsGraph = new Graph();
_blazegraph.LoadGraph(textsGraph, UriFactory.Create(TEXTS_GRAPH));
//
// create triples
//
INode textNode = null;
try
{
textNode = _nodeFactory.CreateUriNode(UriFactory.Create(Uri.EscapeUriString("http://blazegraph-webapp/" + textDetail.Id)));
}
catch (Exception ex)
{
context.Logger.LogLine(ex.Message);
return;
}
var triples = new List <Triple>();
// text instance is of type Text class
triples.Add(new Triple(
subj: textNode,
pred: _nodeFactory.CreateUriNode(UriFactory.Create(NamespaceMapper.RDF + "type")),
obj: _nodeFactory.CreateUriNode(UriFactory.Create("http://blazegraph-webapp/text"))
));
// text instance label
triples.Add(new Triple(
subj: textNode,
pred: _nodeFactory.CreateUriNode(UriFactory.Create(NamespaceMapper.RDFS + "label")),
obj: _nodeFactory.CreateLiteralNode(textDetail.Id, new Uri(XmlSpecsHelper.XmlSchemaDataTypeString))
));
// text instance has an entityCollection instance
triples.Add(new Triple(
subj: textNode,
pred: _nodeFactory.CreateUriNode(UriFactory.Create("http://blazegraph-webapp/text/hasEntityCollection")),
obj: _nodeFactory.CreateUriNode(UriFactory.Create("http://blazegraph-webapp/text/entityCollection/" + textDetail.Id))
));
// entityCollection instance is of type EntityCollection class
triples.Add(new Triple(
subj: _nodeFactory.CreateUriNode(UriFactory.Create("http://blazegraph-webapp/text/entityCollection/" + textDetail.Id)),
pred: _nodeFactory.CreateUriNode(UriFactory.Create(NamespaceMapper.RDF + "type")),
obj: _nodeFactory.CreateUriNode(UriFactory.Create("http://blazegraph-webapp/text/entityCollection"))
));
// filling entityCollection attributes
foreach (var entity in textDetail.Entities)
{
triples.Add(new Triple(
subj: _nodeFactory.CreateUriNode(UriFactory.Create("http://blazegraph-webapp/text/entityCollection/" + textDetail.Id)),
pred: _nodeFactory.CreateUriNode(UriFactory.Create("http://blazegraph-webapp/text/entityCollection/hasEntity")),
obj: _nodeFactory.CreateUriNode(UriFactory.Create("http://blazegraph-webapp/text/entityCollection/" + entity.Type.Value.ToLower()))
));
// entity instance is of type Entity class
triples.Add(new Triple(
subj: _nodeFactory.CreateUriNode(UriFactory.Create("http://blazegraph-webapp/text/entityCollection/" + entity.Type.Value.ToLower())),
pred: _nodeFactory.CreateUriNode(UriFactory.Create(NamespaceMapper.RDF + "type")),
obj: _nodeFactory.CreateUriNode(UriFactory.Create("http://blazegraph-webapp/text/entityCollection/entity"))
));
}
// text instance has an sentiment instance
triples.Add(new Triple(
subj: textNode,
pred: _nodeFactory.CreateUriNode(UriFactory.Create("http://blazegraph-webapp/text/hasSentiment")),
obj: _nodeFactory.CreateUriNode(UriFactory.Create("http://blazegraph-webapp/text/sentiment/" + textDetail.Id))
));
// sentiment instance is of type sentiment that the text has
triples.Add(new Triple(
subj: _nodeFactory.CreateUriNode(UriFactory.Create("http://blazegraph-webapp/text/sentiment/" + textDetail.Id)),
pred: _nodeFactory.CreateUriNode(UriFactory.Create(NamespaceMapper.RDF + "type")),
obj: _nodeFactory.CreateUriNode(UriFactory.Create("http://blazegraph-webapp/text/" + textDetail.Sentiment.Value.ToLower()))
));
// the class sentiment that the text has is a sublcass of Sentiment class
triples.Add(new Triple(
subj: _nodeFactory.CreateUriNode(UriFactory.Create("http://blazegraph-webapp/text/" + textDetail.Sentiment.Value.ToLower())),
pred: _nodeFactory.CreateUriNode(UriFactory.Create(NamespaceMapper.RDFS + "subClassOf")),
obj: _nodeFactory.CreateUriNode(UriFactory.Create("http://blazegraph-webapp/text/sentiment"))
));
//
// updated triples in graph
//
try
{
_blazegraph.UpdateGraph(UriFactory.Create(TEXTS_GRAPH), triples, new List <Triple>());
context.Logger.LogLine("Updated triples successfully.");
}
catch (Exception ex)
{
context.Logger.LogLine(ex.Message);
context.Logger.LogLine(ex.InnerException.Message);
return;
}
}
}
}
catch (AmazonS3Exception ex)
{
context.Logger.LogLine(ex.Message);
}
}
}
/// <summary>
/// This method is called for every Lambda invocation. This method takes in an S3 event object and can be used
/// to respond to S3 notifications.
/// </summary>
/// <param name="s3Event"></param>
/// <param name="context"></param>
/// <returns></returns>
public async Task FunctionHandler(S3Event s3Event, ILambdaContext context)
{
foreach (var record in s3Event.Records)
{
try
{
using (GetObjectResponse response = await _s3Client.GetObjectAsync(new GetObjectRequest()
{
BucketName = record.S3.Bucket.Name,
Key = record.S3.Object.Key
}))
{
using (StreamReader reader = new StreamReader(response.ResponseStream))
{
//
// get main face
//
var selfieDetail = JsonConvert.DeserializeObject <SelfieDetail>(await reader.ReadToEndAsync());
var mainFace = selfieDetail.FacesDetails.OrderByDescending(faceDetail => faceDetail.BoundingBox.Width * faceDetail.BoundingBox.Height).First();
//
// load selfies graph
//
IGraph selfiesGraph = new Graph();
_blazegraph.LoadGraph(selfiesGraph, UriFactory.Create(SELFIES_GRAPH));
//
// create triples
//
INode imageNode = null;
try
{
imageNode = _nodeFactory.CreateUriNode(UriFactory.Create(Uri.EscapeUriString("http://blazegraph-webapp/" + selfieDetail.ImageName)));
}
catch (Exception ex)
{
context.Logger.LogLine(ex.Message);
return;
}
var triples = new List <Triple>();
// image instance is of type Selfie class
triples.Add(new Triple(
subj: imageNode,
pred: _nodeFactory.CreateUriNode(UriFactory.Create(NamespaceMapper.RDF + "type")),
obj: _nodeFactory.CreateUriNode(UriFactory.Create("http://blazegraph-webapp/selfie"))
));
// image instance label
triples.Add(new Triple(
subj: imageNode,
pred: _nodeFactory.CreateUriNode(UriFactory.Create(NamespaceMapper.RDFS + "label")),
obj: _nodeFactory.CreateLiteralNode(selfieDetail.ImageName, new Uri(XmlSpecsHelper.XmlSchemaDataTypeString))
));
// image instance has a faceDetail instance
triples.Add(new Triple(
subj: imageNode,
pred: _nodeFactory.CreateUriNode(UriFactory.Create("http://blazegraph-webapp/selfie/hasFaceDetail")),
obj: _nodeFactory.CreateUriNode(UriFactory.Create("http://blazegraph-webapp/selfie/faceDetail/" + selfieDetail.ImageName))
));
// faceDetail instance is of type FaceDetail class
triples.Add(new Triple(
subj: _nodeFactory.CreateUriNode(UriFactory.Create("http://blazegraph-webapp/selfie/faceDetail/" + selfieDetail.ImageName)),
pred: _nodeFactory.CreateUriNode(UriFactory.Create(NamespaceMapper.RDF + "type")),
obj: _nodeFactory.CreateUriNode(UriFactory.Create("http://blazegraph-webapp/selfie/faceDetail"))
));
// filling faceDetail attributes
triples.AddRange(new List <Triple>()
{
new Triple(
subj: _nodeFactory.CreateUriNode(UriFactory.Create("http://blazegraph-webapp/selfie/faceDetail/" + selfieDetail.ImageName)),
pred: _nodeFactory.CreateUriNode(UriFactory.Create("http://blazegraph-webapp/selfie/faceDetail/isGender")),
obj: _nodeFactory.CreateLiteralNode(mainFace.Gender.Value.ToString().ToLower(), new Uri(XmlSpecsHelper.XmlSchemaDataTypeString))
),
new Triple(
subj: _nodeFactory.CreateUriNode(UriFactory.Create("http://blazegraph-webapp/selfie/faceDetail/" + selfieDetail.ImageName)),
pred: _nodeFactory.CreateUriNode(UriFactory.Create("http://blazegraph-webapp/selfie/faceDetail/hasMinAge")),
obj: _nodeFactory.CreateLiteralNode(mainFace.AgeRange.Low.ToString(), new Uri(XmlSpecsHelper.XmlSchemaDataTypeInteger))
),
new Triple(
subj: _nodeFactory.CreateUriNode(UriFactory.Create("http://blazegraph-webapp/selfie/faceDetail/" + selfieDetail.ImageName)),
pred: _nodeFactory.CreateUriNode(UriFactory.Create("http://blazegraph-webapp/selfie/faceDetail/hasMaxAge")),
obj: _nodeFactory.CreateLiteralNode(mainFace.AgeRange.High.ToString(), new Uri(XmlSpecsHelper.XmlSchemaDataTypeInteger))
),
new Triple(
subj: _nodeFactory.CreateUriNode(UriFactory.Create("http://blazegraph-webapp/selfie/faceDetail/" + selfieDetail.ImageName)),
pred: _nodeFactory.CreateUriNode(UriFactory.Create("http://blazegraph-webapp/selfie/faceDetail/isSmiling")),
obj: _nodeFactory.CreateLiteralNode(Convert.ToInt32(mainFace.Smile.Value).ToString(), new Uri(XmlSpecsHelper.XmlSchemaDataTypeBoolean))
),
new Triple(
subj: _nodeFactory.CreateUriNode(UriFactory.Create("http://blazegraph-webapp/selfie/faceDetail/" + selfieDetail.ImageName)),
pred: _nodeFactory.CreateUriNode(UriFactory.Create("http://blazegraph-webapp/selfie/faceDetail/hasSunglasses")),
obj: _nodeFactory.CreateLiteralNode(Convert.ToInt32(mainFace.Sunglasses.Value).ToString(), new Uri(XmlSpecsHelper.XmlSchemaDataTypeBoolean))
),
new Triple(
subj: _nodeFactory.CreateUriNode(UriFactory.Create("http://blazegraph-webapp/selfie/faceDetail/" + selfieDetail.ImageName)),
pred: _nodeFactory.CreateUriNode(UriFactory.Create("http://blazegraph-webapp/selfie/faceDetail/isFeeling")),
obj: _nodeFactory.CreateLiteralNode(mainFace.Emotions.OrderByDescending(emotion => emotion.Confidence).First().Type.ToString().ToLower(),
new Uri(XmlSpecsHelper.XmlSchemaDataTypeString))
)
});
// image instance has scene instance
triples.Add(new Triple(
subj: imageNode,
pred: _nodeFactory.CreateUriNode(UriFactory.Create("http://blazegraph-webapp/selfie/hasScene")),
obj: _nodeFactory.CreateUriNode(UriFactory.Create("http://blazegraph-webapp/selfie/scene/" + selfieDetail.ImageName))
));
// scene instance is of type Scene class
triples.Add(new Triple(
subj: _nodeFactory.CreateUriNode(UriFactory.Create("http://blazegraph-webapp/selfie/scene/" + selfieDetail.ImageName)),
pred: _nodeFactory.CreateUriNode(UriFactory.Create(NamespaceMapper.RDF + "type")),
obj: _nodeFactory.CreateUriNode(UriFactory.Create("http://blazegraph-webapp/selfie/scene"))
));
// filling scence attributes
foreach (var label in selfieDetail.Labels)
{
triples.Add(new Triple(
subj: _nodeFactory.CreateUriNode(UriFactory.Create("http://blazegraph-webapp/selfie/scene/" + selfieDetail.ImageName)),
pred: _nodeFactory.CreateUriNode(UriFactory.Create("http://blazegraph-webapp/selfie/scene/isDescribedBy")),
obj: _nodeFactory.CreateUriNode(UriFactory.Create("http://blazegraph-webapp/selfie/scene/" + label.Name))
));
foreach (var parentLabel in label.Parents)
{
triples.Add(new Triple(
subj: _nodeFactory.CreateUriNode(UriFactory.Create("http://blazegraph-webapp/selfie/scene/" + label.Name)),
pred: _nodeFactory.CreateUriNode(UriFactory.Create("http://blazegraph-webapp/selfie/scene/hasParent")),
obj: _nodeFactory.CreateUriNode(UriFactory.Create("http://blazegraph-webapp/selfie/scene/" + parentLabel.Name))
));
}
}
//
// updated triples in graph
//
try
{
_blazegraph.UpdateGraph(UriFactory.Create(SELFIES_GRAPH), triples, new List <Triple>());
context.Logger.LogLine("Updated triples successfully.");
}
catch (Exception ex)
{
context.Logger.LogLine(ex.Message);
context.Logger.LogLine(ex.InnerException.Message);
return;
}
}
}
}
catch (AmazonS3Exception ex)
{
context.Logger.LogLine(ex.Message);
}
}
}
/// <summary>
/// A function handling the APIGatewayProxyRequest
/// </summary>
/// <param name="request"></param>
/// <param name="context"></param>
/// <returns></returns>
public async Task <APIGatewayProxyResponse> FunctionHandler(APIGatewayProxyRequest request, ILambdaContext context)
{
if (!_supportedExportTypes.Contains(request.QueryStringParameters["exportType"]))
{
return(new APIGatewayProxyResponse()
{
StatusCode = 400,
Body = "Invalid export type.",
Headers = new Dictionary <string, string>()
{
{ "Access-Control-Allow-Origin", ALLOWED_ORIGIN }
}
});
}
//
// load selfies graph
//
IGraph selfiesGraph = new Graph();
_blazegraph.LoadGraph(selfiesGraph, UriFactory.Create(SELFIES_GRAPH));
//
// create stream
//
try
{
using (MemoryStream stream = new MemoryStream())
{
using (StreamWriter writer = new StreamWriter(stream))
{
switch (request.QueryStringParameters["exportType"])
{
case "ttl":
CompressingTurtleWriter turtleWriter = new CompressingTurtleWriter(TurtleSyntax.W3C)
{
PrettyPrintMode = true
};
turtleWriter.Save(g: selfiesGraph, output: writer, leaveOpen: true);
break;
case "rdf":
PrettyRdfXmlWriter rdfXmlWriter = new PrettyRdfXmlWriter()
{
PrettyPrintMode = true
};
rdfXmlWriter.Save(g: selfiesGraph, output: writer, leaveOpen: true);
break;
}
//
// put stream into S3
//
await _s3Client.PutObjectAsync(new PutObjectRequest()
{
InputStream = stream,
BucketName = TARGET_BUCKET,
Key = DateTime.Now.ToString("yyyy-MM-dd hh-mm-ss", DateTimeFormatInfo.InvariantInfo) + "." + request.QueryStringParameters["exportType"]
});
}
}
}
catch (Exception ex)
{
context.Logger.LogLine(ex.Message);
return(new APIGatewayProxyResponse()
{
StatusCode = 500,
Body = ex.Message,
Headers = new Dictionary <string, string>()
{
{ "Content-Type", "text/plain" },
{ "Access-Control-Allow-Origin", ALLOWED_ORIGIN }
}
});
}
//
// return successfull response
//
return(new APIGatewayProxyResponse()
{
StatusCode = 200,
Headers = new Dictionary <string, string>()
{
{ "Access-Control-Allow-Origin", ALLOWED_ORIGIN }
}
});
}
