FieldExpression

com.google.appengine.api.search.dev

Class FieldExpression


  • public class FieldExpression 
extends Expression
    Expression which evalutes to the content of a field.

    • Nested Class Summary

    • Constructor Summary

      Constructor and Description
      Constructors
      FieldExpression (java.lang.String fieldName, java.util.Set<ContentType> fieldTypes)

    • Method Summary

      Modifier and Type Method and Description
      All Methods Static Methods Instance Methods Concrete Methods
      FieldValue eval (Document doc)
      Evaluate the expression to field value proto for the specified document.
      double evalDouble (Document doc)
      Evaluate double value from specified document.
      FieldValue evalWithTypePriority (Document doc, java.util.List<ContentType> typePriority)
      Expression.Sorter getNumericSorter (int sign, double defaultValueNumeric)
      java.util.List< Expression.Sorter > getSorters (int sign, double defaultValueNumeric, java.lang.String defaultValueText)
      Get list of sort classes for the expression.
      static FieldExpression makeFieldExpression (java.lang.String fieldName, java.util.Set<ContentType> fieldTypes)

      • Methods inherited from class java.lang.Object

        clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

    • Constructor Detail

      • FieldExpression

        public FieldExpression(java.lang.String fieldName,
                       java.util.Set<ContentType> fieldTypes)

    • Method Detail

      • makeFieldExpression

        public static  FieldExpression 
 makeFieldExpression(java.lang.String fieldName,
                                                  java.util.Set<ContentType> fieldTypes)

      • getSorters

        public java.util.List< Expression.Sorter 
> getSorters(int sign,
                                                    double defaultValueNumeric,
                                                    java.lang.String defaultValueText)
        Description copied from class:  Expression
        Get list of sort classes for the expression. Usually it contains just one element, but for field expressions it can potentially return 2 sorters when both numeric and text fields exist with a field name.
        Returns:
        at most 2 sorters. First, special case for numberic fields. Second, alpha-numerical sort for other field types.

      • getNumericSorter

        public  Expression.Sorter 
 getNumericSorter(int sign,
                                          double defaultValueNumeric)