public void TestSerialization() {
var headRulesOriginal =
new HeadRules(new StreamReader(Tests.OpenFile("/opennlp/tools/parser/en_head_rules")));
using (var data = new MemoryStream()) {
headRulesOriginal.Serialize(new StreamWriter(data));
data.Seek(0, SeekOrigin.Begin);
var headRulesRecreated = new HeadRules(new StreamReader(data));
Assert.AreEqual(headRulesOriginal, headRulesRecreated);
}
}
/// <summary>
/// Returns the head constituent for the specified constituents of the specified type.
/// </summary>
/// <param name="constituents">The constituents which make up a constituent of the specified type.</param>
/// <param name="type">The type of a constituent which is made up of the specified constituents.</param>
/// <returns>The constituent which is the head.</returns>
public override Parse GetHead(Parse[] constituents, string type)
{
if (constituents[0].Type == AbstractBottomUpParser.TOK_NODE)
{
return(null);
}
if (type == "NP" || type == "NX")
{
string[] tags1 = { "NN", "NNP", "NNPS", "NNS", "NX", "JJR", "POS" };
for (var ci = constituents.Length - 1; ci >= 0; ci--)
{
for (var ti = tags1.Length - 1; ti >= 0; ti--)
{
if (constituents[ci].Type == tags1[ti])
{
return(constituents[ci].Head);
}
}
}
for (var ci = 0; ci < constituents.Length; ci++)
{
if (constituents[ci].Type == "NP")
{
return(constituents[ci].Head);
}
}
string[] tags2 = { "$", "ADJP", "PRN" };
for (var ci = constituents.Length - 1; ci >= 0; ci--)
{
for (var ti = tags2.Length - 1; ti >= 0; ti--)
{
if (constituents[ci].Type == tags2[ti])
{
return(constituents[ci].Head);
}
}
}
string[] tags3 = { "JJ", "JJS", "RB", "QP" };
for (var ci = constituents.Length - 1; ci >= 0; ci--)
{
for (var ti = tags3.Length - 1; ti >= 0; ti--)
{
if (constituents[ci].Type == tags3[ti])
{
return(constituents[ci].Head);
}
}
}
return(constituents[constituents.Length - 1].Head);
}
if (HeadRules.ContainsKey(type))
{
var hr = HeadRules[type];
var tags = hr.Tags;
var cl = constituents.Length;
var tl = tags.Length;
if (hr.LeftToRight)
{
for (var ti = 0; ti < tl; ti++)
{
for (var ci = 0; ci < cl; ci++)
{
if (constituents[ci].Type == tags[ti])
{
return(constituents[ci].Head);
}
}
}
return(constituents[0].Head);
}
for (var ti = 0; ti < tl; ti++)
{
for (var ci = cl - 1; ci >= 0; ci--)
{
if (constituents[ci].Type == tags[ti])
{
return(constituents[ci].Head);
}
}
}
return(constituents[cl - 1].Head);
}
return(constituents[constituents.Length - 1].Head);
}
