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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