Is the filter "pinyin" supported in Custom normalizer filter？

[jeasonchan]

hi medcl:
Is the filter "pinyin" supported in Custom normalizer filter？
Offical site says, "Custom normalizers take a list of character filters and a list of token filters." But when I try to customize a normalizer with the filter "pinyin" provided from elasticsearch-analysis-pinyin with the following json，error is returned.

  老哥，我看官网说正规器可以使用分析器里用到的那些filter，但是，我用下面的json串设置字段映射时，报错了，内容如下。是不是项目里提供的pinyin  filter不支持用在normalizer 里的filter啊？

# filters defiend in setings  ====================
"filter": {
				"english_stop": {
					"type": "stop",
					"stopwords": "_english_"
				},
				"pinyin_filter": {
					"type": "pinyin",
					"keep_separate_first_letter": false,
					"keep_full_pinyin": true,
					"keep_original": true,
					"limit_first_letter_length": 16,
					"lowercase": true,
					"remove_duplicated_term": true
				}
			},
			"normalizer": {
				"pinyin_normalizer": {
					"type": "custom",
					"char_filter": [],
					"filter": ["pinyin_filter"]
				}
			}

#    mapping   ==================================

	{
				"string_keyword_fields": {
					"match": "*",
					"unmatch": "*_html_",
					"match_mapping_type": "string",
					"mapping": {
						"type": "keyword",
						"normalizer": "pinyin_normalizer"
					}
				}
			}

# response =====================
{
    "error": {
        "root_cause": [
            {
                "type": "illegal_argument_exception",
                "reason": "Custom normalizer [pinyin_normalizer] may not use filter [pinyin_filter]"
            }
        ],
        "type": "illegal_argument_exception",
        "reason": "Custom normalizer [pinyin_normalizer] may not use filter [pinyin_filter]"
    },
    "status": 400
}

[jeasonchan]

After reviewing the office site again, I got this:
The current list of filters that can be used in a normalizer is following: arabic_normalization, asciifolding, bengali_normalization, cjk_width, decimal_digit, elision, german_normalization, hindi_normalization, indic_normalization, lowercase, persian_normalization, scandinavian_folding, serbian_normalization, sorani_normalization, uppercase.

So it menans filters that can be used in custom normalizer are just in the list above and that is why es returns "Custom normalizer [pinyin_normalizer] may not use filter [pinyin_filter]".

Thx