java/src/main/com/google/appengine/api/search/checkers/SortExpressionChecker.java

   1 // Copyright 2011 Google Inc. All Rights Reserved.
   2
   3 package com.google.appengine.api.search.checkers;
   4
   5 import com.google.appengine.api.search.SearchServicePb.SortSpec;
   6
   7 /**
   8  * Checks the values of a {@link SortExpression}.
   9  *
  10  */
  11 public class SortExpressionChecker {
  12
  13   /**
  14    * Checks the {@link ScorerSpec} is valid, specifically checking the limit
  15    * on number of documents to score is not too large.
  16    *
  17    * @param spec the {@link ScorerSpec} to check
  18    * @return the checked spec
  19    * @throws IllegalArgumentException if the spec is invalid
  20    */
  21   public static SortSpec checkValid(SortSpec spec) {
  22     Preconditions.checkArgument(
  23         (!spec.hasDefaultValueText() || !spec.hasDefaultValueNumeric()),
  24         "at most one of default string or numeric value can be specified");
  25     if (spec.hasDefaultValueText()) {
  26       FieldChecker.checkText(spec.getDefaultValueText());
  27     }
  28     return spec;
  29   }
  30 }