/// <summary>
/// Learns a program to extract the surname from a given table row (rather than a whole document).
/// </summary>
public static void LearnSurnameWithRespectToTableRow()
{
string s = File.ReadAllText(Path.Combine(_sampleDocs, "sample-document-1.html"));
HtmlDoc doc = HtmlDoc.Create(s);
WebRegion referenceRegion1 = doc.GetRegion("tr:nth-child(1)"); //1st table row
WebRegion exampleRegion1 = doc.GetRegion("tr:nth-child(1) td:nth-child(2)"); //2nd cell in 1st table row
WebRegion referenceRegion2 = doc.GetRegion("tr:nth-child(2)"); //2nd table row
WebRegion exampleRegion2 = doc.GetRegion("tr:nth-child(2) td:nth-child(2)"); //2nd cell in 2nd table row
CorrespondingMemberEquals <WebRegion, WebRegion> exampleSpec1 = new CorrespondingMemberEquals <WebRegion, WebRegion>(referenceRegion1, exampleRegion1);
CorrespondingMemberEquals <WebRegion, WebRegion> exampleSpec2 = new CorrespondingMemberEquals <WebRegion, WebRegion>(referenceRegion2, exampleRegion2);
Web.RegionProgram prog = Web.RegionLearner.Instance.Learn(new[] { exampleSpec1, exampleSpec2 });
if (prog == null)
{
return;
}
//run the program on 5th table row
WebRegion fifthRowRegion = doc.GetRegion("tr:nth-child(5)"); //5th table row
WebRegion region = prog.Run(new [] { fifthRowRegion })?.SingleOrDefault();
Console.WriteLine("Learn surname with respect to table row: ");
Console.WriteLine(region.GetSpecificSelector());
Console.WriteLine(region.Text());
Console.WriteLine();
}
/// <summary>
/// Learns a program to extract the first surname in the document from two examples
/// from two different documents.
/// </summary>
public static void LearnFirstSurnameInDocumentUsingMultipleExamples()
{
string s1 = File.ReadAllText(Path.Combine(_sampleDocs, "sample-document-1.html"));
HtmlDoc doc1 = HtmlDoc.Create(s1);
string s2 = File.ReadAllText(Path.Combine(_sampleDocs, "sample-document-2.html"));
HtmlDoc doc2 = HtmlDoc.Create(s2);
WebRegion referenceRegion1 = new WebRegion(doc1);
WebRegion referenceRegion2 = new WebRegion(doc2);
WebRegion exampleRegion1 = doc1.GetRegion("tr:nth-child(1) td:nth-child(2)"); //2nd cell in 1st table row of doc1
WebRegion exampleRegion2 = doc2.GetRegion("tr:nth-child(1) td:nth-child(2)"); //2nd cell in 1st table row of doc2
CorrespondingMemberEquals <WebRegion, WebRegion> exampleSpec1 = new CorrespondingMemberEquals <WebRegion, WebRegion>(referenceRegion1, exampleRegion1);
CorrespondingMemberEquals <WebRegion, WebRegion> exampleSpec2 = new CorrespondingMemberEquals <WebRegion, WebRegion>(referenceRegion2, exampleRegion2);
Web.RegionProgram prog = Web.RegionLearner.Instance.Learn(new[] { exampleSpec1, exampleSpec2 });
if (prog == null)
{
return;
}
//run the program on the second document
WebRegion region = prog.Run(new [] { referenceRegion2 })?.SingleOrDefault();
Console.WriteLine("Learn first surname in document from multiple examples: ");
Console.WriteLine(region.GetSpecificSelector());
Console.WriteLine(region.Text());
Console.WriteLine();
}
/// <summary>
/// Learns a program and then serializes and deserializes it.
/// </summary>
public static void SerializeProgram()
{
string s = File.ReadAllText(Path.Combine(_sampleDocs, "sample-document-1.html"));
HtmlDoc doc = HtmlDoc.Create(s);
WebRegion referenceRegion = new WebRegion(doc);
WebRegion exampleRegion = doc.GetRegion("tr:nth-child(1) td:nth-child(2)"); //2nd cell in 1st table row
CorrespondingMemberEquals <WebRegion, WebRegion> exampleSpec = new CorrespondingMemberEquals <WebRegion, WebRegion>(referenceRegion, exampleRegion);
Web.RegionProgram prog = Web.RegionLearner.Instance.Learn(new[] { exampleSpec });
if (prog == null)
{
return;
}
string progText = prog.Serialize();
Web.RegionProgram loadProg = Web.Loader.Instance.Region.Load(progText);
IEnumerable <WebRegion> executionResult = loadProg.Run(new[] { referenceRegion });
Console.WriteLine("Run first surname extraction program after serialization and deserialization: ");
foreach (WebRegion region in executionResult)
{
Console.WriteLine(region.GetSpecificSelector());
Console.WriteLine(region.Text());
}
Console.WriteLine();
}
/// <summary>
/// Learns a program to extract the first surname in the document from one example.
/// </summary>
public static void LearnFirstSurnameInDocumentUsingOneExample()
{
string s = File.ReadAllText(Path.Combine(_sampleDocs, "sample-document-1.html"));
HtmlDoc doc = HtmlDoc.Create(s);
WebRegion referenceRegion = new WebRegion(doc);
WebRegion exampleRegion = doc.GetRegion("tr:nth-child(1) td:nth-child(2)"); //2nd cell in 1st table row
CorrespondingMemberEquals <WebRegion, WebRegion> exampleSpec = new CorrespondingMemberEquals <WebRegion, WebRegion>(referenceRegion, exampleRegion);
Web.RegionProgram prog = Web.RegionLearner.Instance.Learn(new[] { exampleSpec });
if (prog == null)
{
return;
}
//run the program to extract first surname from the document
WebRegion region = prog.Run(new [] { referenceRegion })?.SingleOrDefault();
Console.WriteLine("Learn first surname in document from one example: ");
Console.WriteLine(region.GetSpecificSelector());
Console.WriteLine(region.Text());
Console.WriteLine();
}
/// <summary>
/// Learns a program to extract the surname from a given table row (rather than a whole document)
/// using a negative example.
/// </summary>
public static void LearnSurnameWithRespectToTableRowUsingNegativeExample()
{
string s = File.ReadAllText(Path.Combine(_sampleDocs, "sample-document-1.html"));
HtmlDoc doc = HtmlDoc.Create(s);
WebRegion referenceRegion1 = doc.GetRegion("tr:nth-child(1)"); //1st table row
WebRegion referenceRegion2 = doc.GetRegion("tr:nth-child(2)"); //2nd table row
var posExampleSpec = new CorrespondingMemberEquals <WebRegion, WebRegion>(referenceRegion1, doc.GetRegion("tr:nth-child(1) td:nth-child(2)"));
var negExampleSpec = new CorrespondingMemberDoesNotEqual <WebRegion, WebRegion>(referenceRegion2, doc.GetRegion("tr:nth-child(2) td:nth-child(1)"));
Web.RegionProgram prog = Web.RegionLearner.Instance.Learn(new Constraint <IEnumerable <WebRegion>, IEnumerable <WebRegion> >[] { posExampleSpec, negExampleSpec });
if (prog == null)
{
return;
}
WebRegion region = prog.Run(new [] { referenceRegion1 })?.SingleOrDefault();
Console.WriteLine("Learn surname with respect to table row using negative example: ");
Console.WriteLine(region.GetSpecificSelector());
Console.WriteLine(region.Text());
Console.WriteLine();
}