public static Query Or(Query left, LucenePrefixOperator leftPrefix, Query right, LucenePrefixOperator rightPrefix)
{
return(new BooleanQuery
{
{ left, PrefixToOccurrence(leftPrefix, Occur.SHOULD) },
{ right, PrefixToOccurrence(rightPrefix, Occur.SHOULD) }
});
}
private static Occur PrefixToOccurrence(LucenePrefixOperator prefix, Occur defaultOccurrence)
{
switch (prefix)
{
case LucenePrefixOperator.None:
return(defaultOccurrence);
case LucenePrefixOperator.Plus:
return(Occur.MUST);
case LucenePrefixOperator.Minus:
return(Occur.MUST_NOT);
default:
throw new ArgumentOutOfRangeException("Unknown query prefix " + prefix);
}
}
