Package org.zkoss.xel

Interface ExpressionX

All Superinterfaces:
Expression
All Known Implementing Classes:
ELXelExpression
public interface ExpressionX extends Expression
An extension of Expression to have more control to handle Expression Language EL 2.2 specs.

With ExpressionX, you are allow to set value into property resolved by this expression.

Notice it is available only ZEL 2.2 is used. Please refer to Expressions.newExpressionFactory() for more information.

Since:
6.0.0
Author:
henri

  • Method Details

    • isReadOnly

      boolean isReadOnly(XelContext ctx) throws XelException
      Returns whether this is a read only (cannot setValue) expression.
      Parameters:
      ctx - the evaluation context
      Returns:
      whether this is a read only (cannot setValue) expression.
      Throws:
      XelException

    • setValue

      void setValue(XelContext ctx, Object value) throws XelException
      Set values into the property resolved by this expression.
      Parameters:
      ctx - the evaluation context
      value - the value to be set into the property resolved by this expression
      Throws:
      XelException

    • getExpressionString

      String getExpressionString()
      Returns the expression in String form.
      Returns:
      the expression in String form.

    • getType

      Class getType(XelContext xelc)
      Returns the result type of this expression.
      Parameters:
      xelc - the evaluation context
      Returns:
      the result type of this expression.

    • getValueReference

      ValueReference getValueReference(XelContext xelc)
      Returns the target bean and field name of this expression.
      Parameters:
      xelc - the evaluation context
      Returns:
      the target bean and field name of this expression.