# CustomScoreQueryBuilder param values unexpectedly cast to java.lang.String **URL:** \ **Category:** Elasticsearch\ **Created:** [November 1, 2011, 10:15pm UTC](https://discuss.elastic.co/t/customscorequerybuilder-param-values-unexpectedly-cast-to-java-lang-string/5741 "2011-11-01T22:15:38Z")\ **Posts on this page:** 8\ **Page:** 1
**Author:** ![Alex\_2](https://avatars.discourse-cdn.com/v4/letter/a/ad7895/32.png) [@Alex\_2](https://discuss.elastic.co/u/Alex_2)\ **Post date:** [November 1, 2011, 10:15pm UTC](https://discuss.elastic.co/t/customscorequerybuilder-param-values-unexpectedly-cast-to-java-lang-string/5741/1 "2011-11-01T22:15:38Z")
The parameter values added to a CustomScoreQueryBuilder by using .param(java.lang.String key, java.lang.Object value) end up being Strings when retrieved in an implementation of, for example, AbstractDoubleSearchScript. Somewhere the values are cast to java.lang.String, but I couldn't find where. Is this behavior expected? Cheers Alex ---
**Author:** ![kimchy](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/kimchy/32/44952_2.png) [@kimchy](https://discuss.elastic.co/u/kimchy)\ **Post date:** [November 1, 2011, 11:01pm UTC](https://discuss.elastic.co/t/customscorequerybuilder-param-values-unexpectedly-cast-to-java-lang-string/5741/2 "2011-11-01T23:01:01Z")
No, it should maintain its native type (i.e. Double, or Integer). Can you open an issue, I will have a look... On Wed, Nov 2, 2011 at 12:15 AM, Alex [alessandro.usseglioviretta@gmail.com](mailto:alessandro.usseglioviretta@gmail.com)wrote: > The parameter values added to a CustomScoreQueryBuilder by > using .param(java.lang.String key, java.lang.Object value) end up being > Strings when retrieved in an implementation of, for example, > AbstractDoubleSearchScript. Somewhere the values are cast to > java.lang.String, but I couldn't find where. Is this behavior expected? > > Cheers > Alex ---
**Author:** ![Alex\_2](https://avatars.discourse-cdn.com/v4/letter/a/ad7895/32.png) [@Alex\_2](https://discuss.elastic.co/u/Alex_2)\ **Post date:** [November 1, 2011, 11:59pm UTC](https://discuss.elastic.co/t/customscorequerybuilder-param-values-unexpectedly-cast-to-java-lang-string/5741/3 "2011-11-01T23:59:46Z")
alright, this is the Scala code to replicate the problem > and here is the stack trace > Cheers Alex ---
**Author:** ![Alex\_2](https://avatars.discourse-cdn.com/v4/letter/a/ad7895/32.png) [@Alex\_2](https://discuss.elastic.co/u/Alex_2)\ **Post date:** [November 2, 2011, 12:03am UTC](https://discuss.elastic.co/t/customscorequerybuilder-param-values-unexpectedly-cast-to-java-lang-string/5741/4 "2011-11-02T00:03:27Z")
Double and Int work as expected. Are there limitations in the types that can be used? Alex ---
**Author:** ![Alex\_2](https://avatars.discourse-cdn.com/v4/letter/a/ad7895/32.png) [@Alex\_2](https://discuss.elastic.co/u/Alex_2)\ **Post date:** [November 2, 2011, 1:31am UTC](https://discuss.elastic.co/t/customscorequerybuilder-param-values-unexpectedly-cast-to-java-lang-string/5741/5 "2011-11-02T01:31:38Z")
A hint that might help solve the riddle: if the value placed into the param is a java.util.HashMap instead of Test, that is .param("test", someHashMap\)), it works as expected. Alex ---
**Author:** ![kimchy](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/kimchy/32/44952_2.png) [@kimchy](https://discuss.elastic.co/u/kimchy)\ **Post date:** [November 2, 2011, 6:33pm UTC](https://discuss.elastic.co/t/customscorequerybuilder-param-values-unexpectedly-cast-to-java-lang-string/5741/6 "2011-11-02T18:33:22Z")
The parameters supported are only the ones supported by "json", i.e. native types (numeric, string), and map/lists. Are you trying to pass a "custom" class? In this case, it will just pass the "toString" representation of it. On Wed, Nov 2, 2011 at 3:31 AM, Alex [alessandro.usseglioviretta@gmail.com](mailto:alessandro.usseglioviretta@gmail.com)wrote: > A hint that might help solve the riddle: if the value placed into the > param is a java.util.HashMap instead of Test, > that is .param("test", someHashMap\)), it works as expected. > > Alex ---
**Author:** ![Alex\_2](https://avatars.discourse-cdn.com/v4/letter/a/ad7895/32.png) [@Alex\_2](https://discuss.elastic.co/u/Alex_2)\ **Post date:** [November 2, 2011, 7:04pm UTC](https://discuss.elastic.co/t/customscorequerybuilder-param-values-unexpectedly-cast-to-java-lang-string/5741/7 "2011-11-02T19:04:40Z")
ok, that makes sense. Thanks! Alex ---
**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\ **Post date:** [July 6, 2017, 3:50am UTC](https://discuss.elastic.co/t/customscorequerybuilder-param-values-unexpectedly-cast-to-java-lang-string/5741/8 "2017-07-06T03:50:04Z")