/// <summary>
/// Convert from a String representation of a GrammaticalRelation to a
/// GrammaticalRelation.
/// </summary>
/// <remarks>
/// Convert from a String representation of a GrammaticalRelation to a
/// GrammaticalRelation. Where possible, you should avoid using this
/// method and simply work with true GrammaticalRelations rather than
/// String representations. Correct behavior of this method depends
/// on the underlying data structure resources used being kept in sync
/// with the toString() and equals() methods. However, there is really
/// no choice but to use this method when storing GrammaticalRelations
/// to text files and then reading them back in, so this method is not
/// deprecated.
/// </remarks>
/// <param name="s">The String representation of a GrammaticalRelation</param>
/// <returns>The grammatical relation represented by this String</returns>
public static Edu.Stanford.Nlp.Trees.GrammaticalRelation ValueOf(Language language, string s)
{
Edu.Stanford.Nlp.Trees.GrammaticalRelation reln;
lock (stringsToRelations)
{
reln = (stringsToRelations[language] != null ? ValueOf(s, stringsToRelations[language]) : null);
}
if (reln == null)
{
// TODO this breaks the hierarchical structure of the classes,
// but it makes English relations that much likelier to work.
reln = UniversalEnglishGrammaticalRelations.ValueOf(s);
}
if (reln == null)
{
// the block below fails when 'specific' includes underscores.
// this is possible on weird web text, which generates relations such as prep______
/*
* String[] names = s.split("_");
* String specific = names.length > 1? names[1] : null;
* reln = new GrammaticalRelation(language, names[0], null, null, null, specific);
*/
string name;
string specific;
char separator = language == Language.UniversalEnglish ? ':' : '_';
int underscorePosition = s.IndexOf(separator);
if (underscorePosition > 0)
{
name = Sharpen.Runtime.Substring(s, 0, underscorePosition);
specific = Sharpen.Runtime.Substring(s, underscorePosition + 1);
}
else
{
name = s;
specific = null;
}
reln = new Edu.Stanford.Nlp.Trees.GrammaticalRelation(language, name, null, null, specific);
}
return(reln);
}
/// <summary>
/// When deserializing a GrammaticalRelation, it needs to be matched
/// up with the existing singleton relation of the same type.
/// </summary>
/// <remarks>
/// When deserializing a GrammaticalRelation, it needs to be matched
/// up with the existing singleton relation of the same type.
/// TODO: there are a bunch of things wrong with this. For one
/// thing, it's crazy slow, since it goes through all the existing
/// relations in an array. For another, it would be cleaner to have
/// subclasses for the English and Chinese relations
/// </remarks>
/// <exception cref="Java.IO.ObjectStreamException"/>
protected internal virtual object ReadResolve()
{
switch (language)
{
case Language.Any:
{
if (shortName.Equals(Governor.shortName))
{
return(Governor);
}
else
{
if (shortName.Equals(Dependent.shortName))
{
return(Dependent);
}
else
{
if (shortName.Equals(Root.shortName))
{
return(Root);
}
else
{
if (shortName.Equals(Kill.shortName))
{
return(Kill);
}
else
{
throw new Exception("Unknown general relation " + shortName);
}
}
}
}
goto case Language.English;
}
case Language.English:
{
Edu.Stanford.Nlp.Trees.GrammaticalRelation rel = EnglishGrammaticalRelations.ValueOf(ToString());
if (rel == null)
{
switch (shortName)
{
case "conj":
{
return(EnglishGrammaticalRelations.GetConj(specific));
}
case "prep":
{
return(EnglishGrammaticalRelations.GetPrep(specific));
}
case "prepc":
{
return(EnglishGrammaticalRelations.GetPrepC(specific));
}
default:
{
// TODO: we need to figure out what to do with relations
// which were serialized and then deprecated. Perhaps there
// is a good way to make them singletons
return(this);
}
}
}
else
{
//throw new RuntimeException("Unknown English relation " + this);
return(rel);
}
goto case Language.Chinese;
}
case Language.Chinese:
{
Edu.Stanford.Nlp.Trees.GrammaticalRelation rel = ChineseGrammaticalRelations.ValueOf(ToString());
if (rel == null)
{
// TODO: we need to figure out what to do with relations
// which were serialized and then deprecated. Perhaps there
// is a good way to make them singletons
return(this);
}
//throw new RuntimeException("Unknown Chinese relation " + this);
return(rel);
}
case Language.UniversalEnglish:
{
Edu.Stanford.Nlp.Trees.GrammaticalRelation rel_1 = UniversalEnglishGrammaticalRelations.ValueOf(ToString());
if (rel_1 == null)
{
switch (shortName)
{
case "conj":
{
return(UniversalEnglishGrammaticalRelations.GetConj(specific));
}
case "nmod":
{
return(UniversalEnglishGrammaticalRelations.GetNmod(specific));
}
case "acl":
{
return(UniversalEnglishGrammaticalRelations.GetAcl(specific));
}
case "advcl":
{
return(UniversalEnglishGrammaticalRelations.GetAdvcl(specific));
}
default:
{
// TODO: we need to figure out what to do with relations
// which were serialized and then deprecated. Perhaps there
// is a good way to make them singletons
return(this);
}
}
}
else
{
//throw new RuntimeException("Unknown English relation " + this);
return(rel_1);
}
goto default;
}
default:
{
throw new Exception("Unknown language " + language);
}
}
}
