# Default token in Aanlyzer if emitted tokens are empty
**URL:** https://discuss.elastic.co/t/default-token-in-aanlyzer-if-emitted-tokens-are-empty/355971
**Category:** Elasticsearch
**Tags:** eql-elastic-query-language
**Created:** [March 22, 2024, 8:50am UTC](https://discuss.elastic.co/t/default-token-in-aanlyzer-if-emitted-tokens-are-empty/355971 "2024-03-22T08:50:40Z")
**Posts on this page:** 2
**Page:** 1
### Author:  [@Sumanth](https://discuss.elastic.co/u/Sumanth)
#### Post date: [March 22, 2024, 8:50am UTC](https://discuss.elastic.co/t/default-token-in-aanlyzer-if-emitted-tokens-are-empty/355971/1 "2024-03-22T08:50:40Z")
Hello Experts,
```
The requirement is - when firing a query on index, we have one big Elastic Query DSL query built to run a a search on the index.
For one of the property field, we have applied a custom analyzer.
One of the Filter used in the analyzer is a synonym translator, which produces one of the 4 expected tokens based on input string/token.
***IF nothing matches, is there a way to test if emitted tokens are null - only then set "xyz" as default output token ?***
```
"CustomTranslator" : {
"type" : "synonym",
"synonyms" : [
"volunt,voluntari,chip,regist =\> typeA",
"program,event,particip,partak,regist =\> typeB",
"contribut,donat,donor,give,provid,sponsor,fund,raise,money,support =\> typeC",
"enlist,associat,enrol,join,member,membership,regist =\> typeD",
]
}
My custom analyzer is like this
"MyCustomTypeAnalyzer" : {
"filter" : [
"EngStopWordsRemover",
"lowercase",
"EngStemmer",
"CustomTranslator",
"SpaceTokenRemover",
"unique"
],
"tokenizer" : "standard"
},
If the input text had no matching synonym I get only empty token array. But I need to place this in a must block (i.e. this CustomTypeAnalyzer is applied on a property in a query which is used in a must query block.
So it cannot be empty, I need a default token to be emited by the Analyzer, if my choice of default token is 'typeA', then I need my analyzer to emit the default token only if the CustomTranlator did not yeild any tokens.
How can I do it ?
I tried conditional filter, but that too seems to operate only on input tokens only.
I basically need to be able to test if emitted tokens are null.
I cannot run multiple queries, my query builder will run and fire one search query on the index, so I want my Custom Analyzer itself to be conditionally able to emit a default token if the emitted tokens were to be null.
---
### Author:  [@system](https://discuss.elastic.co/u/system)
#### Post date: [April 19, 2024, 8:50am UTC](https://discuss.elastic.co/t/default-token-in-aanlyzer-if-emitted-tokens-are-empty/355971/2 "2024-04-19T08:50:44Z")
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