package gw.rating.rtm.query


@ReadOnly
class QueryStrategyHandler {

  var _memoryThreshold : int

  construct() {
    _memoryThreshold = 1000
  }

  construct(memoryThreshold : int) {
    this._memoryThreshold = memoryThreshold
  }

  // Sets the query strategy for rate tables associated with book.
  // @param book targeted book whose rate tables the query strategy will be set for
  function setTableStrategyFor(book : RateBook) {
    book.RateTables.each(\ rt -> {
      rt.QueryStrategy = getStrategyFor(rt)
    })
  }

  // Returns the appropriate FactorQueryStrategy the passed in table.
  // @param table The rate table whose FactorQueryStrategy will be determined for
  // @return FactorQueryStrategy to use for the associated table
  private function getStrategyFor(table : RateTable) : FactorQueryStrategy {
    return table.NumRows <= _memoryThreshold ? FactorQueryStrategy.TC_MEMORY : FactorQueryStrategy.TC_DATABASE
  }
}