Elasticsearch Plugin Sortchar Filter

elasticsearch plugin filter to sort char. Before indexing sort chars.

Installation

Copy build jar in <path>/<to>/<elasticsearch>/plugins/sortchar-filter where <path>/<to>/<elasticsearch> is the path to your Elasticsearch installation.

Restart Elastic search, it can be used as a plugin right away. Check ES logs for any Errors.

How to use

1. Create on test index with custom analyzer using sense

PUT test
{
  "mappings": {
    "terms": {
      "properties": {
        "name": {
          "type": "string",
          "analyzer": "sortchar_custom_analyser"
        }
      }
    }
  },
  "settings": {
    "index": {
      "analysis": {
        "filter": {
          "sort_chars": {
            "sort_order": "asc",
            "type": "sortchar"
          }
        },
        "analyzer": {
          "lowercase_analyzer": {
            "filter": "lowercase",
            "tokenizer": "keyword"
          },
          "sortchar_custom_analyser": {
            "filter": [
              "lowercase",
              "sort_chars"
            ],
            "tokenizer": "whitespace"
          }
        }
      }
    }
  }
}

2. Test analyzer

GET test/_analyze?analyzer=sortchar_custom_analyser&pretty=true&text=bac Result { "tokens": [ { "token": "abc", "start_offset": 0, "end_offset": 0, "type": "word", "position": 1 } ] }

3. Index some data

POST test/names/1 { "name": "a and b" }

4. Validate using Search

GET test/_search { "query": {"match": { "name": "a and b" }} } OR GET test/_search { "query": {"match": { "name": "b and a" }} }

Both will produce same result.