private TermsFilter(FieldAndTermEnum iter, int length)
{
iter.OuterInstance = this; // .NET specific, since "this" can't be used in ctor redirection
// TODO: maybe use oal.index.PrefixCodedTerms instead?
// If number of terms is more than a few hundred it
// should be a win
// TODO: we also pack terms in FieldCache/DocValues
// ... maybe we can refactor to share that code
// TODO: yet another option is to build the union of the terms in
// an automaton an call intersect on the termsenum if the density is high
int hash = 9;
var serializedTerms = new byte[0];
this.offsets = new int[length + 1];
int lastEndOffset = 0;
int index = 0;
var termsAndFields = new List<TermsAndField>();
TermsAndField lastTermsAndField = null;
BytesRef previousTerm = null;
string previousField = null;
BytesRef currentTerm;
string currentField;
while ((currentTerm = iter.Next()) != null)
{
currentField = iter.Field;
if (currentField == null)
{
throw new System.ArgumentException("Field must not be null");
}
if (previousField != null)
{
// deduplicate
if (previousField.Equals(currentField))
{
if (previousTerm.BytesEquals(currentTerm))
{
continue;
}
}
else
{
int _start = lastTermsAndField == null ? 0 : lastTermsAndField.end;
lastTermsAndField = new TermsAndField(_start, index, previousField);
termsAndFields.Add(lastTermsAndField);
}
}
hash = PRIME * hash + currentField.GetHashCode();
hash = PRIME * hash + currentTerm.GetHashCode();
if (serializedTerms.Length < lastEndOffset + currentTerm.Length)
{
serializedTerms = ArrayUtil.Grow(serializedTerms, lastEndOffset + currentTerm.Length);
}
Array.Copy(currentTerm.Bytes, currentTerm.Offset, serializedTerms, lastEndOffset, currentTerm.Length);
offsets[index] = lastEndOffset;
lastEndOffset += currentTerm.Length;
index++;
previousTerm = currentTerm;
previousField = currentField;
}
offsets[index] = lastEndOffset;
int start = lastTermsAndField == null ? 0 : lastTermsAndField.end;
lastTermsAndField = new TermsAndField(start, index, previousField);
termsAndFields.Add(lastTermsAndField);
this.termsBytes = ArrayUtil.Shrink(serializedTerms, lastEndOffset);
this.termsAndFields = termsAndFields.ToArray();
this.hashCode_Renamed = hash;
}
private TermsFilter(FieldAndTermEnum iter, int length)
{
// TODO: maybe use oal.index.PrefixCodedTerms instead?
// If number of terms is more than a few hundred it
// should be a win
// TODO: we also pack terms in FieldCache/DocValues
// ... maybe we can refactor to share that code
// TODO: yet another option is to build the union of the terms in
// an automaton an call intersect on the termsenum if the density is high
int hash = 9;
var serializedTerms = Arrays.Empty <byte>();
this.offsets = new int[length + 1];
int lastEndOffset = 0;
int index = 0;
var termsAndFields = new List <TermsAndField>();
TermsAndField lastTermsAndField = null;
BytesRef previousTerm = null;
string previousField = null;
BytesRef currentTerm;
string currentField;
while (iter.MoveNext())
{
currentTerm = iter.Current;
currentField = iter.Field;
if (currentField == null)
{
throw new ArgumentException("Field must not be null");
}
if (previousField != null)
{
// deduplicate
if (previousField.Equals(currentField, StringComparison.Ordinal))
{
if (previousTerm.BytesEquals(currentTerm))
{
continue;
}
}
else
{
int _start = lastTermsAndField == null ? 0 : lastTermsAndField.end;
lastTermsAndField = new TermsAndField(_start, index, previousField);
termsAndFields.Add(lastTermsAndField);
}
}
hash = PRIME * hash + currentField.GetHashCode();
hash = PRIME * hash + currentTerm.GetHashCode();
if (serializedTerms.Length < lastEndOffset + currentTerm.Length)
{
serializedTerms = ArrayUtil.Grow(serializedTerms, lastEndOffset + currentTerm.Length);
}
Array.Copy(currentTerm.Bytes, currentTerm.Offset, serializedTerms, lastEndOffset, currentTerm.Length);
offsets[index] = lastEndOffset;
lastEndOffset += currentTerm.Length;
index++;
previousTerm = currentTerm;
previousField = currentField;
}
offsets[index] = lastEndOffset;
int start = lastTermsAndField == null ? 0 : lastTermsAndField.end;
lastTermsAndField = new TermsAndField(start, index, previousField);
termsAndFields.Add(lastTermsAndField);
this.termsBytes = ArrayUtil.Shrink(serializedTerms, lastEndOffset);
this.termsAndFields = termsAndFields.ToArray();
this.hashCode = hash;
}
