/// <summary>
/// Given the root Element for a SemgrexPattern (SSURGEON_ELEM_TAG), converts
/// it into its corresponding SemgrexPattern object.
/// </summary>
/// <exception cref="System.Exception"/>
public static SsurgeonPattern SsurgeonPatternFromXML(IElement elt)
{
string uid = GetTagText(elt, SsurgeonPattern.UidElemTag);
string notes = GetTagText(elt, SsurgeonPattern.NotesElemTag);
string semgrexString = GetTagText(elt, SsurgeonPattern.SemgrexElemTag);
SemgrexPattern semgrexPattern = SemgrexPattern.Compile(semgrexString);
SsurgeonPattern retPattern = new SsurgeonPattern(uid, semgrexPattern);
retPattern.SetNotes(notes);
INodeList editNodes = elt.GetElementsByTagName(SsurgeonPattern.EditListElemTag);
for (int i = 0; i < editNodes.GetLength(); i++)
{
INode node = editNodes.Item(i);
if (node.GetNodeType() == NodeConstants.ElementNode)
{
IElement editElt = (IElement)node;
string editVal = GetEltText(editElt);
retPattern.AddEdit(Edu.Stanford.Nlp.Semgraph.Semgrex.Ssurgeon.Ssurgeon.ParseEditLine(editVal));
}
}
// If predicate available, parse
IElement predElt = GetFirstTag(elt, SsurgeonPattern.PredicateTag);
if (predElt != null)
{
ISsurgPred pred = AssemblePredFromXML(GetFirstChildElement(predElt));
retPattern.SetPredicate(pred);
}
return(retPattern);
}
public virtual void SimpleTest()
{
SemanticGraph sg = SemanticGraph.ValueOf("[mixed/VBN nsubj>[Joe/NNP appos>[bartender/NN det>the/DT]] dobj>[drink/NN det>a/DT]]");
SemgrexPattern semgrexPattern = SemgrexPattern.Compile("{}=a1 >appos=e1 {}=a2 <nsubj=e2 {}=a3");
SsurgeonPattern pattern = new SsurgeonPattern(semgrexPattern);
System.Console.Out.WriteLine("Start = " + sg.ToCompactString());
// Find and snip the appos and root to nsubj links
SsurgeonEdit apposSnip = new RemoveNamedEdge("e1", "a1", "a2");
pattern.AddEdit(apposSnip);
SsurgeonEdit nsubjSnip = new RemoveNamedEdge("e2", "a3", "a1");
pattern.AddEdit(nsubjSnip);
// Attach Joe to be the nsubj of bartender
SsurgeonEdit reattachSubj = new AddEdge("a2", "a1", EnglishGrammaticalRelations.NominalSubject);
pattern.AddEdit(reattachSubj);
// Attach copula
IndexedWord isNode = new IndexedWord();
isNode.Set(typeof(CoreAnnotations.TextAnnotation), "is");
isNode.Set(typeof(CoreAnnotations.LemmaAnnotation), "is");
isNode.Set(typeof(CoreAnnotations.OriginalTextAnnotation), "is");
isNode.Set(typeof(CoreAnnotations.PartOfSpeechAnnotation), "VBN");
SsurgeonEdit addCopula = new AddDep("a2", EnglishGrammaticalRelations.Copula, isNode);
pattern.AddEdit(addCopula);
// Destroy subgraph
SsurgeonEdit destroySubgraph = new DeleteGraphFromNode("a3");
pattern.AddEdit(destroySubgraph);
// Process and output modified
ICollection <SemanticGraph> newSgs = pattern.Execute(sg);
foreach (SemanticGraph newSg in newSgs)
{
System.Console.Out.WriteLine("Modified = " + newSg.ToCompactString());
}
string firstGraphString = newSgs.GetEnumerator().Current.ToCompactString().Trim();
NUnit.Framework.Assert.AreEqual(firstGraphString, "[bartender cop>is nsubj>Joe det>the]");
}