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:

StaticExpression

Method Summary

Modifier and Type	Method and 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 Detail

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