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## com.google.appengine.api.search.dev
Class ExpressionBuilder.EmptyExpression

    java.lang.Object
      com.google.appengine.api.search.dev.Expression
          com.google.appengine.api.search.dev.ExpressionBuilder.EmptyExpression

Enclosing class:
  ExpressionBuilder

    public static class ExpressionBuilder.EmptyExpression

extends Expression

Empty Expression, which is evaluated if the input string was empty.

Nested Class Summary

Nested classes/interfaces inherited from class com.google.appengine.api.search.dev.Expression
`Expression.Sorter`

Constructor Summary
`ExpressionBuilder.EmptyExpression()`

Method Summary
`FieldValue` | `eval(Document doc)` Evaluate the expression to field value proto for the specified document.
`java.util.List<Expression.Sorter>` | `getSorters(int sign, double dfltD, java.lang.String dfltT)` Get list of sort classes for the expression.

Methods inherited from class com.google.appengine.api.search.dev.Expression
`makeValue`

Methods inherited from class java.lang.Object
`clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

Constructor Detail

### ExpressionBuilder.EmptyExpression

    public ExpressionBuilder.EmptyExpression()

Method Detail

### eval

    public FieldValue eval(Document doc)
                    throws EvaluationException

  Description copied from class: `Expression`
  Evaluate the expression to field value proto for the specified document.

  Specified by:
    `eval` in class `Expression`
  Throws:
    `EvaluationException`

### getSorters

    public java.util.List<Expression.Sorter> getSorters(int sign,
                                                        double dfltD,
                                                        java.lang.String dfltT)

  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.

  Specified by:
    `getSorters` in class `Expression`

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