Package org.apache.activemq.artemis.selector.filter

## Interface Expression

- All Known Subinterfaces:
    `BooleanExpression`
  All Known Implementing Classes:
    `ArithmeticExpression`, `BinaryExpression`, `ComparisonExpression`, `ConstantExpression`, `LogicExpression`, `PropertyExpression`, `UnaryExpression`, `XPathExpression`, `XQueryExpression`

      public interface Expression

  Represents an expression
  Version:
    $Revision: 1.2 $

- - ### Method Summary

    All Methods Instance Methods Abstract Methods
    Modifier and Type | Method | Description
    --- | --- | ---
    `java.lang.Object` | `evaluate​(Filterable message)` |

- - ### Method Detail

    - #### evaluate

          java.lang.Object evaluate​(Filterable message)
                             throws FilterException

      Returns:
        the value of this expression
      Throws:
        `FilterException`