protected override IQueryNode PostProcessNode(IQueryNode node)
{
if (node is ITextableQueryNode
&& !(node is WildcardQueryNode)
&& !(node is FuzzyQueryNode)
&& !(node is RegexpQueryNode)
&& !(node.Parent is IRangeQueryNode))
{
FieldQueryNode fieldNode = ((FieldQueryNode)node);
string text = fieldNode.GetTextAsString();
string field = fieldNode.GetFieldAsString();
CachingTokenFilter buffer = null;
IPositionIncrementAttribute posIncrAtt = null;
int numTokens = 0;
int positionCount = 0;
bool severalTokensAtSamePosition = false;
TokenStream source = null;
try
{
source = this.analyzer.TokenStream(field, text);
source.Reset();
buffer = new CachingTokenFilter(source);
if (buffer.HasAttribute<IPositionIncrementAttribute>())
{
posIncrAtt = buffer.GetAttribute<IPositionIncrementAttribute>();
}
try
{
while (buffer.IncrementToken())
{
numTokens++;
int positionIncrement = (posIncrAtt != null) ? posIncrAtt
.PositionIncrement : 1;
if (positionIncrement != 0)
{
positionCount += positionIncrement;
}
else
{
severalTokensAtSamePosition = true;
}
}
}
#pragma warning disable 168
catch (IOException e)
#pragma warning restore 168
{
// ignore
}
}
catch (IOException e)
{
throw new Exception(e.Message, e);
}
finally
{
IOUtils.CloseWhileHandlingException(source);
}
// rewind the buffer stream
buffer.Reset();
if (!buffer.HasAttribute<ICharTermAttribute>())
{
return new NoTokenFoundQueryNode();
}
ICharTermAttribute termAtt = buffer.GetAttribute<ICharTermAttribute>();
if (numTokens == 0)
{
return new NoTokenFoundQueryNode();
}
else if (numTokens == 1)
{
string term = null;
try
{
bool hasNext;
hasNext = buffer.IncrementToken();
Debug.Assert(hasNext == true);
term = termAtt.ToString();
}
#pragma warning disable 168
catch (IOException e)
#pragma warning restore 168
{
// safe to ignore, because we know the number of tokens
}
fieldNode.Text = term.ToCharSequence();
return fieldNode;
}
else if (severalTokensAtSamePosition || !(node is QuotedFieldQueryNode))
{
if (positionCount == 1 || !(node is QuotedFieldQueryNode))
{
// no phrase query:
if (positionCount == 1)
{
// simple case: only one position, with synonyms
List<IQueryNode> children = new List<IQueryNode>();
for (int i = 0; i < numTokens; i++)
{
string term = null;
try
{
bool hasNext = buffer.IncrementToken();
Debug.Assert(hasNext == true);
term = termAtt.ToString();
}
#pragma warning disable 168
catch (IOException e)
#pragma warning restore 168
{
// safe to ignore, because we know the number of tokens
}
children.Add(new FieldQueryNode(field, term, -1, -1));
}
return new GroupQueryNode(
new StandardBooleanQueryNode(children, positionCount == 1));
}
else
{
// multiple positions
IQueryNode q = new StandardBooleanQueryNode(new List<IQueryNode>(), false);
IQueryNode currentQuery = null;
for (int i = 0; i < numTokens; i++)
{
string term = null;
try
{
bool hasNext = buffer.IncrementToken();
Debug.Assert(hasNext == true);
term = termAtt.ToString();
}
#pragma warning disable 168
catch (IOException e)
#pragma warning restore 168
{
// safe to ignore, because we know the number of tokens
}
if (posIncrAtt != null && posIncrAtt.PositionIncrement == 0)
{
if (!(currentQuery is BooleanQueryNode))
{
IQueryNode t = currentQuery;
currentQuery = new StandardBooleanQueryNode(new List<IQueryNode>(), true);
((BooleanQueryNode)currentQuery).Add(t);
}
((BooleanQueryNode)currentQuery).Add(new FieldQueryNode(field, term, -1, -1));
}
else
{
if (currentQuery != null)
{
if (this.defaultOperator == Operator.OR)
{
q.Add(currentQuery);
}
else
{
q.Add(new ModifierQueryNode(currentQuery, Modifier.MOD_REQ));
}
}
currentQuery = new FieldQueryNode(field, term, -1, -1);
}
}
if (this.defaultOperator == Operator.OR)
{
q.Add(currentQuery);
}
else
{
q.Add(new ModifierQueryNode(currentQuery, Modifier.MOD_REQ));
}
if (q is BooleanQueryNode)
{
q = new GroupQueryNode(q);
}
return q;
}
}
else
{
// phrase query:
MultiPhraseQueryNode mpq = new MultiPhraseQueryNode();
List<FieldQueryNode> multiTerms = new List<FieldQueryNode>();
int position = -1;
int i = 0;
int termGroupCount = 0;
for (; i < numTokens; i++)
{
string term = null;
int positionIncrement = 1;
try
{
bool hasNext = buffer.IncrementToken();
Debug.Assert(hasNext == true);
term = termAtt.ToString();
if (posIncrAtt != null)
{
positionIncrement = posIncrAtt.PositionIncrement;
}
}
#pragma warning disable 168
catch (IOException e)
#pragma warning restore 168
{
// safe to ignore, because we know the number of tokens
}
if (positionIncrement > 0 && multiTerms.Count > 0)
{
foreach (FieldQueryNode termNode in multiTerms)
{
if (this.positionIncrementsEnabled)
{
termNode.PositionIncrement = position;
}
else
{
termNode.PositionIncrement = termGroupCount;
}
mpq.Add(termNode);
}
// Only increment once for each "group" of
// terms that were in the same position:
termGroupCount++;
multiTerms.Clear();
}
position += positionIncrement;
multiTerms.Add(new FieldQueryNode(field, term, -1, -1));
}
foreach (FieldQueryNode termNode in multiTerms)
{
if (this.positionIncrementsEnabled)
{
termNode.PositionIncrement = position;
}
else
{
termNode.PositionIncrement = termGroupCount;
}
mpq.Add(termNode);
}
return mpq;
}
}
else
{
TokenizedPhraseQueryNode pq = new TokenizedPhraseQueryNode();
int position = -1;
for (int i = 0; i < numTokens; i++)
{
string term = null;
int positionIncrement = 1;
try
{
bool hasNext = buffer.IncrementToken();
Debug.Assert(hasNext == true);
term = termAtt.ToString();
if (posIncrAtt != null)
{
positionIncrement = posIncrAtt.PositionIncrement;
}
}
#pragma warning disable 168
catch (IOException e)
#pragma warning restore 168
{
// safe to ignore, because we know the number of tokens
}
FieldQueryNode newFieldNode = new FieldQueryNode(field, term, -1, -1);
if (this.positionIncrementsEnabled)
{
position += positionIncrement;
newFieldNode.PositionIncrement = position;
}
else
{
newFieldNode.PositionIncrement = i;
}
pq.Add(newFieldNode);
}
return pq;
}
}
return node;
}
public override IQueryNode CloneTree()
{
GroupQueryNode clone = (GroupQueryNode)base.CloneTree();
return(clone);
}
public IQueryNode Clause(string field)
{
IQueryNode q;
Token fieldToken = null, boost = null, @operator = null, term = null;
FieldQueryNode qLower, qUpper;
bool lowerInclusive, upperInclusive;
bool group = false;
if (Jj_2_2(3))
{
fieldToken = Jj_consume_token(RegexpToken.TERM);
switch ((jj_ntk == -1) ? Jj_ntk() : jj_ntk)
{
case RegexpToken.OP_COLON:
case RegexpToken.OP_EQUAL:
switch ((jj_ntk == -1) ? Jj_ntk() : jj_ntk)
{
case RegexpToken.OP_COLON:
Jj_consume_token(RegexpToken.OP_COLON);
break;
case RegexpToken.OP_EQUAL:
Jj_consume_token(RegexpToken.OP_EQUAL);
break;
default:
jj_la1[7] = jj_gen;
Jj_consume_token(-1);
throw new ParseException();
}
field = EscapeQuerySyntaxImpl.DiscardEscapeChar(fieldToken.image).ToString();
q = Term(field);
break;
case RegexpToken.OP_LESSTHAN:
case RegexpToken.OP_LESSTHANEQ:
case RegexpToken.OP_MORETHAN:
case RegexpToken.OP_MORETHANEQ:
switch ((jj_ntk == -1) ? Jj_ntk() : jj_ntk)
{
case RegexpToken.OP_LESSTHAN:
@operator = Jj_consume_token(RegexpToken.OP_LESSTHAN);
break;
case RegexpToken.OP_LESSTHANEQ:
@operator = Jj_consume_token(RegexpToken.OP_LESSTHANEQ);
break;
case RegexpToken.OP_MORETHAN:
@operator = Jj_consume_token(RegexpToken.OP_MORETHAN);
break;
case RegexpToken.OP_MORETHANEQ:
@operator = Jj_consume_token(RegexpToken.OP_MORETHANEQ);
break;
default:
jj_la1[8] = jj_gen;
Jj_consume_token(-1);
throw new ParseException();
}
field = EscapeQuerySyntaxImpl.DiscardEscapeChar(fieldToken.image).ToString();
switch ((jj_ntk == -1) ? Jj_ntk() : jj_ntk)
{
case RegexpToken.TERM:
term = Jj_consume_token(RegexpToken.TERM);
break;
case RegexpToken.QUOTED:
term = Jj_consume_token(RegexpToken.QUOTED);
break;
case RegexpToken.NUMBER:
term = Jj_consume_token(RegexpToken.NUMBER);
break;
default:
jj_la1[9] = jj_gen;
Jj_consume_token(-1);
throw new ParseException();
}
if (term.kind == RegexpToken.QUOTED)
{
term.image = term.image.Substring(1, (term.image.Length - 1) - 1);
}
switch (@operator.kind)
{
case RegexpToken.OP_LESSTHAN:
lowerInclusive = true;
upperInclusive = false;
qLower = new FieldQueryNode(field,
"*", term.beginColumn, term.endColumn);
qUpper = new FieldQueryNode(field,
EscapeQuerySyntaxImpl.DiscardEscapeChar(term.image), term.beginColumn, term.endColumn);
break;
case RegexpToken.OP_LESSTHANEQ:
lowerInclusive = true;
upperInclusive = true;
qLower = new FieldQueryNode(field,
"*", term.beginColumn, term.endColumn);
qUpper = new FieldQueryNode(field,
EscapeQuerySyntaxImpl.DiscardEscapeChar(term.image), term.beginColumn, term.endColumn);
break;
case RegexpToken.OP_MORETHAN:
lowerInclusive = false;
upperInclusive = true;
qLower = new FieldQueryNode(field,
EscapeQuerySyntaxImpl.DiscardEscapeChar(term.image), term.beginColumn, term.endColumn);
qUpper = new FieldQueryNode(field,
"*", term.beginColumn, term.endColumn);
break;
case RegexpToken.OP_MORETHANEQ:
lowerInclusive = true;
upperInclusive = true;
qLower = new FieldQueryNode(field,
EscapeQuerySyntaxImpl.DiscardEscapeChar(term.image), term.beginColumn, term.endColumn);
qUpper = new FieldQueryNode(field,
"*", term.beginColumn, term.endColumn);
break;
default:
{ if (true) throw new Exception("Unhandled case: operator=" + @operator.ToString()); }
}
q = new TermRangeQueryNode(qLower, qUpper, lowerInclusive, upperInclusive);
break;
default:
jj_la1[10] = jj_gen;
Jj_consume_token(-1);
throw new ParseException();
}
}
else
{
switch ((jj_ntk == -1) ? Jj_ntk() : jj_ntk)
{
case RegexpToken.LPAREN:
case RegexpToken.QUOTED:
case RegexpToken.TERM:
case RegexpToken.REGEXPTERM:
case RegexpToken.RANGEIN_START:
case RegexpToken.RANGEEX_START:
case RegexpToken.NUMBER:
if (Jj_2_1(2))
{
fieldToken = Jj_consume_token(RegexpToken.TERM);
switch ((jj_ntk == -1) ? Jj_ntk() : jj_ntk)
{
case RegexpToken.OP_COLON:
Jj_consume_token(RegexpToken.OP_COLON);
break;
case RegexpToken.OP_EQUAL:
Jj_consume_token(RegexpToken.OP_EQUAL);
break;
default:
jj_la1[11] = jj_gen;
Jj_consume_token(-1);
throw new ParseException();
}
field = EscapeQuerySyntaxImpl.DiscardEscapeChar(fieldToken.image).ToString();
}
else
{
;
}
switch ((jj_ntk == -1) ? Jj_ntk() : jj_ntk)
{
case RegexpToken.QUOTED:
case RegexpToken.TERM:
case RegexpToken.REGEXPTERM:
case RegexpToken.RANGEIN_START:
case RegexpToken.RANGEEX_START:
case RegexpToken.NUMBER:
q = Term(field);
break;
case RegexpToken.LPAREN:
Jj_consume_token(RegexpToken.LPAREN);
q = Query(field);
Jj_consume_token(RegexpToken.RPAREN);
switch ((jj_ntk == -1) ? Jj_ntk() : jj_ntk)
{
case RegexpToken.CARAT:
Jj_consume_token(RegexpToken.CARAT);
boost = Jj_consume_token(RegexpToken.NUMBER);
break;
default:
jj_la1[12] = jj_gen;
break;
}
group = true;
break;
default:
jj_la1[13] = jj_gen;
Jj_consume_token(-1);
throw new ParseException();
}
break;
default:
jj_la1[14] = jj_gen;
Jj_consume_token(-1);
throw new ParseException();
}
}
if (boost != null)
{
float f = (float)1.0;
try
{
f = Convert.ToSingle(boost.image, CultureInfo.InvariantCulture);
// avoid boosting null queries, such as those caused by stop words
if (q != null)
{
q = new BoostQueryNode(q, f);
}
}
#pragma warning disable 168
catch (Exception ignored)
#pragma warning restore 168
{
/* Should this be handled somehow? (defaults to "no boost", if
* boost number is invalid)
*/
}
}
if (group) { q = new GroupQueryNode(q); }
{ if (true) return q; }
throw new Exception("Missing return statement in function");
}
