[jira] [Created] (SOLR-7508) ModifiableSolrParams.toMultiMap() does not handle arrays

["Thomas Scheffler (JIRA)" <ji...@apache.org>]

Thomas Scheffler created SOLR-7508:
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             Summary: ModifiableSolrParams.toMultiMap() does not handle arrays
                 Key: SOLR-7508
                 URL: https://issues.apache.org/jira/browse/SOLR-7508
             Project: Solr
          Issue Type: Bug
          Components: SolrJ
    Affects Versions: 5.1, 5.0
            Reporter: Thomas Scheffler


Following JUnit test to show what I mean:

{code}
ModifiableSolrParams params = new ModifiableSolrParams();
String[] paramValues = new String[] { "title:junit", "author:john" };
String paramName = "fq";
params.add(paramName, paramValues);
NamedList<Object> namedList = params.toNamedList();
assertEquals("parameter values do not equal", paramValues, namedList.get(paramName));
Map<String, String[]> multiMap = ModifiableSolrParams.toMultiMap(namedList);
assertEquals("Expected " + paramValues.length + " values", paramValues.length, multiMap.get(paramName).length);
{code}

The first {{assertEquals()}} will run fine, while the last one triggers the error. Suddenly the length of the array is "1" and it's value of {{fq}} is like {{[Ljava.lang.String;@6f09c9c0}}. Looking into the code I see that the toMultiMap() method does not even look for arrays.



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