Class LambdaExpression

Constructor Detail

• LambdaExpression

  public LambdaExpression(List<String> formalParameters,
                          ValueExpression expression)

  Creates a new LambdaExpression.

  Parameters:

  formalParameters - The list of String representing the formal parameters.

  expression - The ValueExpression representing the body.

Method Detail

• setELContext

  public void setELContext(ELContext context)

  Set the ELContext to use in evaluating the LambdaExpression. The ELContext must to be set prior to the invocation of the LambdaExpression, unless it is supplied with invoke(javax.el.ELContext, java.lang.Object...).

  Parameters:

  context - The ELContext to use in evaluating the LambdaExpression.

• invoke

  public Object invoke(ELContext elContext,
                       Object... args)
                throws ELException

  Invoke the encapsulated Lambda expression.

  The supplied arguments are matched, in the same order, to the formal parameters. If there are more arguments than the formal parameters, the extra arguments are ignored. If there are less arguments than the formal parameters, an ELException is thrown.

  The actual Lambda arguments are added to the ELContext and are available during the evaluation of the Lambda expression. They are removed after the evaluation.

  Parameters:

  elContext - The ELContext used for the evaluation of the expression The ELContext set by setELContext(javax.el.ELContext) is ignored.

  args - The arguments to invoke the Lambda expression. For calls with no arguments, an empty array must be provided. A Lambda argument can be null.

  Returns:

  The result of invoking the Lambda expression

  Throws:

  ELException - if not enough arguments are provided

  NullPointerException - is elContext is null

• invoke

  public Object invoke(Object... args)

  Invoke the encapsulated Lambda expression.

  The supplied arguments are matched, in the same order, to the formal parameters. If there are more arguments than the formal parameters, the extra arguments are ignored. If there are less arguments than the formal parameters, an ELException is thrown.

  The actual Lambda arguments are added to the ELContext and are available during the evaluation of the Lambda expression. They are removed after the evaluation.

  The ELContext set by setELContext(javax.el.ELContext) is used in the evaluation of the lambda Expression.

  Parameters:

  args - The arguments to invoke the Lambda expression. For calls with no arguments, an empty array must be provided. A Lambda argument can be null.

  Returns:

  The result of invoking the Lambda expression

  Throws:

  ELException - if not enough arguments are provided