package gw.solr.mapper

uses gw.xsd.config.solr_search_config.DataProperty

uses java.lang.StringBuilder
uses java.util.List


@ReadOnly
class BuildURN implements ISolrIndexMapper {

  /**
   * Constructs the URN from key fields, typically the publicID's of a subset of the entities from which the document is constructed.
   *
   * @param inputDataProperties array of entity properties, describing the entities and the properties
   * that constitute the publicID's from which the urn is to be constructed.
   * @param beanMap map mapping names of beans to beans
   *
   * @return urn string for a Solr document
   */
  override function mapIndex(inputDataProperties : List<DataProperty>, dataHolder : IDataHolder) : String {
    var sb = new StringBuilder(128)
    var delimit = false
    for (idp in inputDataProperties) {
      if (delimit) {
        sb.append('&')
      } else {
        delimit = true
      }
      sb.append(dataHolder.lookupKey(idp)).append('=')
      sb.append(dataHolder.lookup<String>(idp))
    }
    return sb.toString()
  }

}