package gw.solr.schema

uses gw.xsd.config.solr_search_config.Indexer
uses gw.xsd.config.solr_search_config.Query
uses gw.xsd.config.solr_search_config.QueryResult
uses gw.xsd.config.solr_search_config.SolrSchemaMapping

uses java.io.File
uses java.io.Reader
uses java.lang.Exception


/**
 * Represents a Solr document configuration file that's been read and parsed
 * and is available for use.
 */
@ReadOnly
class SolrSchemaConfigReader {

  var _schemaFile : File
  var _schema : SolrSchemaMapping

  construct(theFile : File) {
    _schemaFile = theFile
    _schema = SolrSchemaMapping.parse(_schemaFile)
  }

  construct(theStream : Reader) {
    _schema = SolrSchemaMapping.parse(theStream)
  }
  
  property get Indexer() : Indexer {
    return _schema.Indexer
  }

  property get Query() : Query {
    return _schema.Query
  }

  property get QueryResult() : QueryResult {
    return _schema.QueryResult
  }

  /**
   * Perform some rudimentary validation of this Solr document configuration.
   */
  function validate() {
    var keyFound = false
    for (var entry in _schema.Indexer.IndexField) {
      if(entry.Key) {
        if (keyFound) {
          throw new Exception("Cannot have more than one key field in Solr/Lucene index" + _schemaFile != null ? " in file ${_schemaFile.Name}" : "")
        }
        keyFound = true
      }
    }
  }

}