Package org.apache.camel

Interface Expression

All Known Subinterfaces:
StaticExpression
public interface Expression
An expression provides a plugin strategy for evaluating expressions on a message exchange. An expression should be thread-safe and be able to evaluate concurrently by different threads with different exchanges. Any initialization logic should be done by the init(CamelContext) method which allows to prepare the expressions such as wiring in resources, pre-parsing and what else.
See Also:

  • Method Summary

    Modifier and Type
    Method
    Description
    <T> T
    evaluate(Exchange exchange, Class<T> type)
    Returns the value of the expression on the given exchange
    default void
    init(CamelContext context)
    Initialize the expression with the given camel context

  • Method Details

    • evaluate

      <T> T evaluate(Exchange exchange, Class<T> type)
      Returns the value of the expression on the given exchange
      Parameters:
      exchange - the message exchange on which to evaluate the expression
      type - the expected type of the evaluation result
      Returns:
      the value of the expression

    • init

      default void init(CamelContext context)
      Initialize the expression with the given camel context
      Parameters:
      context - the camel context