public static HashSet <Feature> GeneralizeTextFeatures(String text)
{
HashSet <Feature> res = new HashSet <Feature>();
Feature f = new Feature();
f.type = Feature.FeatureType.Selector;
f.feature = new List <string>()
{
"text()='" + XpathTools.EscapeString(text.Trim()) + "'"
};
f.cost = FeatureCosts.TEXT_EQUAL;
res.Add(f);
Regex reg = new Regex("(?=([A-Z\\-\\s]))");
string[] splitted = reg.Split(XpathTools.EscapeString(text));
foreach (var split in splitted)
{
var curr = split.Replace("-", "").Trim();
if (curr.Length < 2)
{
continue;
}
Feature f_contains = new Feature();
f_contains.type = Feature.FeatureType.Selector;
f_contains.feature = new List <string>()
{
"contains(text(),'" + curr + "')"
};
f_contains.cost = FeatureCosts.TEXT_CONTAINS;
res.Add(f_contains);
}
return(res);
}
public static HashSet <Feature> GeneralizeAttributeFeatures(HtmlAttribute att)
{
if (att.Name.Equals(DomPool.selectionAttribute) || att.Name.Equals(DomPool.optionalSelectionAttribute))
{
return(new HashSet <Feature>());
}
HashSet <Feature> res = new HashSet <Feature>();
//BASE att name existance condition
Feature f = new Feature();
f.type = Feature.FeatureType.Selector;
f.feature = new List <string>()
{
"@" + att.Name
};
f.cost = FeatureCosts.ATT_BASE;
res.Add(f);
if (att.Value.Trim().Length >= 1)
{
f = new Feature();
f.type = Feature.FeatureType.Selector;
f.feature = new List <string>()
{
"@" + att.Name + "='" + XpathTools.EscapeString(att.Value.Trim()) + "'"
};
f.cost = FeatureCosts.ATT_EQUAL;
res.Add(f);
f = new Feature();
f.type = Feature.FeatureType.Selector;
f.feature = new List <string>()
{
"@*='" + XpathTools.EscapeString(att.Value.Trim()) + "'"
};
f.cost = FeatureCosts.ATT_ANY_EQUAL;
res.Add(f);
}
Regex reg = new Regex("(?=([A-Z\\-\\s/\\?\\=_]))");
string[] splitted = reg.Split(XpathTools.EscapeString(att.Value));
//fix, it must keep the letters and remove the symboles.
foreach (var split in splitted)
{
string curr = split.Replace("-", "").Trim();
if (curr.Length < 2)
{
continue;
}
Feature f_contains = new Feature();
f_contains.type = Feature.FeatureType.Selector;
f_contains.feature = new List <string>()
{
"@" + att.Name + "[contains(translate(., 'ABCDEFGHIJKLMNOPQRSTUVWXYZ', 'abcdefghijklmnopqrstuvwxyz'),'" + curr + "')]"
};
f_contains.cost = FeatureCosts.ATT_CONTAINS;
res.Add(f_contains);
Feature f_any_contains = new Feature();
f_any_contains.type = Feature.FeatureType.Selector;
f_any_contains.feature = new List <string>()
{
"@*[contains(translate(., 'ABCDEFGHIJKLMNOPQRSTUVWXYZ', 'abcdefghijklmnopqrstuvwxyz'),'" + curr + "')]"
};
f_any_contains.cost = FeatureCosts.ATT_ANY_CONTAINS;
res.Add(f_any_contains);
}
for (int i = 0; i < splitted.Length - 1; i++)
{
var split = splitted[i] + splitted[i + 1];
string curr = split.Replace("-", "").Trim();
if (curr.Length < 2)
{
continue;
}
Feature f_contains = new Feature();
f_contains.type = Feature.FeatureType.Selector;
f_contains.feature = new List <string>()
{
"@" + att.Name + "[contains(translate(., 'ABCDEFGHIJKLMNOPQRSTUVWXYZ', 'abcdefghijklmnopqrstuvwxyz'),'" + curr + "')]"
};
f_contains.cost = FeatureCosts.ATT_CONTAINS + 0.05;
res.Add(f_contains);
Feature f_any_contains = new Feature();
f_any_contains.type = Feature.FeatureType.Selector;
f_any_contains.feature = new List <string>()
{
"@*[contains(translate(., 'ABCDEFGHIJKLMNOPQRSTUVWXYZ', 'abcdefghijklmnopqrstuvwxyz'),'" + curr + "')]"
};
f_any_contains.cost = FeatureCosts.ATT_ANY_CONTAINS + 0.05;
res.Add(f_any_contains);
}
return(res);
}
