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some corrections for flex migration, thanks to Andi Vajda 

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/trunk@962851 13f79535-47bb-0310-9956-ffa450edef68
This commit is contained in:
Michael McCandless 2010-07-10 14:43:37 +00:00
parent 38672332d5
commit 9cfb3be57f
1 changed files with 56 additions and 1 deletions
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57
lucene/MIGRATE.txt
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@ -22,11 +22,42 @@ LUCENE-2380: FieldCache.getStrings/Index --> FieldCache.getDocTerms/Index
DocTerms values = FieldCache.DEFAULT.getTerms(reader, field); DocTerms values = FieldCache.DEFAULT.getTerms(reader, field);
... ...
BytesRef term = new BytesRef(); BytesRef term = new BytesRef();
String aValue = values.get(docID, term).utf8ToString(); String aValue = values.getTerm(docID, term).utf8ToString();
Note however that it can be costly to convert to String, so it's Note however that it can be costly to convert to String, so it's
better to work directly with the BytesRef. better to work directly with the BytesRef.
* Similarly, in FieldCache, getStringIndex (returning a StringIndex
instance, with direct arrays int[] order and String[] lookup) has
been replaced with getTermsIndex (returning a
FieldCache.DocTermsIndex instance). DocTermsIndex provides the
getOrd(int docID) method to lookup the int order for a document,
lookup(int ord, BytesRef reuse) to lookup the term from a given
order, and the sugar method getTerm(int docID, BytesRef reuse)
which internally calls getOrd and then lookup.
If you had code like this before:
StringIndex idx = FieldCache.DEFAULT.getStringIndex(reader, field);
...
int ord = idx.order[docID];
String aValue = idx.lookup[ord];
you can do this instead:
DocTermsIndex idx = FieldCache.DEFAULT.getTermsIndex(reader, field);
...
int ord = idx.getOrd(docID);
BytesRef term = new BytesRef();
String aValue = idx.lookup(ord, term).utf8ToString();
Note however that it can be costly to convert to String, so it's
better to work directly with the BytesRef.
DocTermsIndex also has a getTermsEnum() method, which returns an
iterator (TermsEnum) over the term values in the index (ie,
iterates ord = 0..numOrd()-1).
* StringComparatorLocale is now more CPU costly than it was before * StringComparatorLocale is now more CPU costly than it was before
(it was already very CPU costly since it does not compare using (it was already very CPU costly since it does not compare using
indexed collation keys; use CollationKeyFilter for better indexed collation keys; use CollationKeyFilter for better
@ -101,6 +132,30 @@ LUCENE-1458, LUCENE-2111: Flexible Indexing
... ...
} }
The bulk read API has also changed. Instead of this:
int[] docs = new int[256];
int[] freqs = new int[256];
while(true) {
int count = td.read(docs, freqs)
if (count == 0) {
break;
}
// use docs[i], freqs[i]
}
do this:
DocsEnum.BulkReadResult bulk = td.getBulkResult();
while(true) {
int count = td.read();
if (count == 0) {
break;
}
// use bulk.docs.ints[i] and bulk.freqs.ints[i]
}
* TermPositions is renamed to DocsAndPositionsEnum, and no longer * TermPositions is renamed to DocsAndPositionsEnum, and no longer
extends the docs only enumerator (DocsEnum). extends the docs only enumerator (DocsEnum).