Package org.zkoss.xel

## Interface Expression

- All Known Subinterfaces:
    `ExpressionX`
  All Known Implementing Classes:
    `BindXelExpression`, `BindXelExpressionEx`, `ELXelExpression`, `ELXelExpression`, `PropertyExpression`

      public interface Expression

  Represent a prepared (a.k.a., compiled) expression. It can be retrieved by use of `ExpressionFactory`.
  Since:
    3.0.0
  Author:
    tomyeh

- - ### Method Summary

    All Methods Instance Methods Abstract Methods
    Modifier and Type | Method | Description
    --- | --- | ---
    `java.lang.Object` | `evaluate​(XelContext ctx)` | Evaluates an expression that was previously prepared.

- - ### Method Detail

    - #### evaluate

          java.lang.Object evaluate​(XelContext ctx)
                             throws XelException

      Evaluates an expression that was previously prepared.
      Throws:
        `XelException`