Hi Everyone
I am busying attempting to integrate Lucene 4.0 Alpha into my code base.
I have a custom QueryParser that extends QueryParser and overrides
newRangeQuery and newTermQuery to support typed fields.
I think I've figured out the newRangeQuery method translation (shown
further down below), but newTermQuery method override is proving a
little more tricky. I am not sure how to implement the equivalent of
(Lucene 3.6 code below):
return new TermQuery(new Term(term.field(),
NumericUtils.doubleToPrefixCoded(Double.parseDouble(term
.text()))));
for the various field type.
A quick pointer would be most appreciated.
Thanks
Jamie
public class CustomQueryParser extends QueryParser {
@Override
protected Query newTermQuery(Term term) {
if (term.field().equals("uid")) {
return super.newTermQuery(term);
}
com.stimulus.field.Field field =
Config.getConfig().getBlobFactory().getBlobFieldsFromCategory(blobCategory).get(term.field());
// this is our custom field
if (field == null || field.getType() == Type.STRING) {
return super.newTermQuery(term);
} else if (field.getType() == Type.INTEGER
|| field.getType() == Type.BOOLEAN) {
return new TermQuery(
new Term((new
Term(term.field(),NumericUtils.intToPrefixCoded(Integer.parseInteger(term.text()))));
} else if (field.getType() == Type.DOUBLE) {
return new TermQuery(new Term(term.field(),
NumericUtils.doubleToPrefixCoded(Double.parseDouble(term
.text()))));
} else if (field.getType() == Type.FLOAT
|| field.getType() == Type.SIZE) {
return new TermQuery(new Term(term.field(),
NumericUtils.floatToPrefixCoded(Float.parseFloat(term
.text()))));
} else if (field.getType() == Type.DATE || field.getType() ==
Type.SIZE) {
return new TermQuery(
new Term(term.field(),
NumericUtils.longToPrefixCoded(Long
.parseLong(term.text()))));
} else {
return super.newTermQuery(term);
}
}
@Override
protected Query newRangeQuery(String fieldStr, String part1, String
part2,boolean startInclusive, boolean endInclusive) {
TermRangeQuery query = (TermRangeQuery)
super.newRangeQuery(fieldStr,part1, part2, startInclusive, endInclusive);
Field field = Config.getConfig().getBlobFactory()
.getBlobFieldsFromCategory(blobCategory).get(fieldStr);
if (field == null || field.getType() == Type.STRING) {
return query;
} else if (field.getType() == Type.INTEGER) {
return NumericRangeQuery.newIntRange(field.getIndexField(), 4,
Integer.parseInt(query.getLowerTerm().utf8ToString()),
Integer.parseInt(query.getUpperTerm().utf8ToString()),
query.includesLower(), query.includesUpper());
} else if (field.getType() == Type.LONG) {
return NumericRangeQuery.newLongRange(field.getIndexField(), 8,
Long.parseLong(query.getLowerTerm().utf8ToString()),
Long.parseLong(query.getUpperTerm().utf8ToString()),
query.includesLower(), query.includesUpper());
} else if (field.getType() == Type.DOUBLE) {
return
NumericRangeQuery.newDoubleRange(field.getIndexField(), 8,
Double.parseDouble(query.getLowerTerm().utf8ToString()),
Double.parseDouble(query.getUpperTerm().utf8ToString()),
query.includesLower(), query.includesUpper());
} else if (field.getType() == Type.FLOAT) {
return
NumericRangeQuery.newFloatRange(field.getIndexField(), 4,
Float.parseFloat(query.getLowerTerm().utf8ToString()),
Float.parseFloat(query.getUpperTerm().utf8ToString()),
query.includesLower(), query.includesUpper());
} else if (field.getType() == Type.DATE || field.getType() ==
Type.SIZE) {
return NumericRangeQuery.newLongRange(field.getIndexField(), 8,
Long.parseLong(query.getLowerTerm().utf8ToString()),
Long.parseLong(query.getUpperTerm().utf8ToString()),
query.includesLower(), query.includesUpper());
}
return query;
}
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