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https://issues.apache.org/jira/browse/SOLR-5351?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13969610#comment-13969610
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Upayavira commented on SOLR-5351:
---------------------------------
These two snippets of code seem to work. I will recraft it as a patch soon.
However, I wonder if there are more standard ways of rereading a Reader.
{code:java}
private class ResettingReader extends Reader {
Reader wrapped;
public ResettingReader(Reader reader) {
wrapped = reader;
}
public int read(char[]buf, int off, int len) throws IOException {
return wrapped.read(buf, off, len);
}
public void close() throws IOException {
wrapped.reset();
}
public void reallyClose() throws IOException {
wrapped.close();
}
}
{code}
{code:java}
public DocListAndSet getMoreLikeThis( Reader reader, int start, int rows,
List<Query> filters, List<InterestingTerm> terms, int flags ) throws IOException
{
if (mlt.getFieldNames().length==1) {
rawMLTQuery = mlt.like(reader, mlt.getFieldNames()[0]);
} else {
BooleanQuery mltQuery = new BooleanQuery();
ResettingReader reader2 = new ResettingReader(reader);
for (String fieldName : mlt.getFieldNames()) {
BooleanQuery singleFieldQuery = (BooleanQuery)mlt.like(reader2,
fieldName);
for (BooleanClause clause : singleFieldQuery.getClauses()) {
mltQuery.add(clause);
}
}
reader2.reallyClose();
rawMLTQuery = mltQuery;
}
...
{code}
> More Like This Handler uses only first field in mlt.fl when using stream.body
> -----------------------------------------------------------------------------
>
> Key: SOLR-5351
> URL: https://issues.apache.org/jira/browse/SOLR-5351
> Project: Solr
> Issue Type: Bug
> Components: MoreLikeThis
> Affects Versions: 4.4
> Environment: Linux,Windows
> Reporter: Zygmunt Wiercioch
> Assignee: Tommaso Teofili
> Priority: Minor
>
> The documentation at: http://wiki.apache.org/solr/MoreLikeThisHandler
> indicates that one can use multiple fields for similarity in mlt.fl:
> http://localhost:8983/solr/mlt?stream.body=electronics%20memory&mlt.fl=manu,cat&mlt.interestingTerms=list&mlt.mintf=0
> In trying this, only one field is used.
> Looking at the code, it only looks at the firs field:
> public DocListAndSet getMoreLikeThis( Reader reader, int start, int rows,
> List<Query> filters, List<InterestingTerm> terms, int flags ) throws
> IOException
> {
> // analyzing with the first field: previous (stupid) behavior
> rawMLTQuery = mlt.like(reader, mlt.getFieldNames()[0]);
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