Examples with MapperPlugin org.opensearch.plugins.MapperPlugin used on opensource projects

Example 11 with MapperPlugin

use of org.opensearch.plugins.MapperPlugin in project OpenSearch by opensearch-project.

the class IndicesModule method getMetadataMappers.

public static Map<String, MetadataFieldMapper.TypeParser> getMetadataMappers(List<MapperPlugin> mapperPlugins) {
    Map<String, MetadataFieldMapper.TypeParser> metadataMappers = new LinkedHashMap<>();
    int i = 0;
    Map.Entry<String, MetadataFieldMapper.TypeParser> fieldNamesEntry = null;
    for (Map.Entry<String, MetadataFieldMapper.TypeParser> entry : builtInMetadataMappers.entrySet()) {
        if (i < builtInMetadataMappers.size() - 1) {
            metadataMappers.put(entry.getKey(), entry.getValue());
        } else {
            assert entry.getKey().equals(FieldNamesFieldMapper.NAME) : "_field_names must be the last registered mapper, order counts";
            fieldNamesEntry = entry;
        }
        i++;
    }
    assert fieldNamesEntry != null;
    for (MapperPlugin mapperPlugin : mapperPlugins) {
        for (Map.Entry<String, MetadataFieldMapper.TypeParser> entry : mapperPlugin.getMetadataMappers().entrySet()) {
            if (entry.getKey().equals(FieldNamesFieldMapper.NAME)) {
                throw new IllegalArgumentException("Plugin cannot contain metadata mapper [" + FieldNamesFieldMapper.NAME + "]");
            }
            if (metadataMappers.put(entry.getKey(), entry.getValue()) != null) {
                throw new IllegalArgumentException("MetadataFieldMapper [" + entry.getKey() + "] is already registered");
            }
        }
    }
    // we register _field_names here so that it has a chance to see all the other mappers, including from plugins
    metadataMappers.put(fieldNamesEntry.getKey(), fieldNamesEntry.getValue());
    return Collections.unmodifiableMap(metadataMappers);
}