RescoringMatchScorer (Google App Engine API for Java)

com.google.appengine.api.search

Class RescoringMatchScorer

• java.lang.Object
• • com.google.appengine.api.search.MatchScorer
  • • com.google.appengine.api.search.RescoringMatchScorer

• ---

  
  

  public final class RescoringMatchScorer
  extends MatchScorer

  Assigns a document score based on term frequency weighted on document parts. If you add a MatchScorer to a SortOptions as in the following code:

    SortOptions sortOptions = SortOptions.newBuilder()
        .setMatchScorer(RescoringMatchScorer.newBuilder())
        .build();
   

  then this will sort the documents in descending score order. The scores will be positive. If you want to sort in ascending order, then use the following code:

     SortOptions sortOptions = SortOptions.newBuilder()
         .setMatchScorer(RescoringMatchScorer.newBuilder())
         .addSortExpression(
             SortExpression.newBuilder()
                 .setExpression(SortExpression.SCORE_FIELD_NAME)
                 .setDirection(SortExpression.SortDirection.ASCENDING)
                 .setDefaultValueNumeric(0.0))
         .build();
   

  The scores in this case will be negative.

• • Nested Class Summary

    Nested Classes 

    Modifier and Type	Class and Description
    static class	RescoringMatchScorer.Builder A builder that constructs RescoringMatchScorers.

  • Method Summary

    All Methods Static Methods Instance Methods Concrete Methods 

    Modifier and Type	Method and Description
    static RescoringMatchScorer.Builder	newBuilder() Creates and returns a RescoringMatchScorer Builder.
    java.lang.String	toString()

    • Methods inherited from class java.lang.Object

      equals, getClass, hashCode, notify, notifyAll, wait, wait, wait

• • Method Detail

    • newBuilder

      public static RescoringMatchScorer.Builder newBuilder()

      Creates and returns a RescoringMatchScorer Builder.

      Returns:

      a new RescoringMatchScorer.Builder. Set the parameters for scorer on the Builder, and use the RescoringMatchScorer.Builder.build() method to create a concrete instance of RescoringMatchScorer

    • toString

      public java.lang.String toString()

      Overrides:

      toString in class MatchScorer