Package org.springframework.integration.handler

Class ExpressionEvaluatingMessageProcessor<T>

java.lang.Object

org.springframework.integration.util.AbstractExpressionEvaluator

org.springframework.integration.handler.AbstractMessageProcessor<T>

org.springframework.integration.handler.ExpressionEvaluatingMessageProcessor<T>

Type Parameters:

T - the expected payload type.

All Implemented Interfaces:

Aware, BeanFactoryAware, InitializingBean, MessageProcessor<T>

public class ExpressionEvaluatingMessageProcessor<T>
extends AbstractMessageProcessor<T>

A MessageProcessor implementation that evaluates a SpEL expression with the Message itself as the root object within the evaluation context.

Since:

2.0

Author:

Mark Fisher, Artem Bilan, Gary Russell

Field Summary

Fields inherited from class org.springframework.integration.util.AbstractExpressionEvaluator

EXPRESSION_PARSER, logger

Constructor Summary

Constructors

Constructor	Description
ExpressionEvaluatingMessageProcessor(String expression)	Create an ExpressionEvaluatingMessageProcessor for the given expression.
ExpressionEvaluatingMessageProcessor(String expression, Class<T> expectedType)	Construct ExpressionEvaluatingMessageProcessor for the provided SpEL expression and expected result type.
ExpressionEvaluatingMessageProcessor(Expression expression)	Create an ExpressionEvaluatingMessageProcessor for the given expression.
ExpressionEvaluatingMessageProcessor(Expression expression, Class<T> expectedType)	Create an ExpressionEvaluatingMessageProcessor for the given expression and expected type for its evaluation result.

Method Summary

Modifier and Type	Method	Description
T	processMessage(Message<?> message)	Processes the Message by evaluating the expression with that Message as the root object.
String	toString()

Methods inherited from class org.springframework.integration.util.AbstractExpressionEvaluator

afterPropertiesSet, evaluateExpression, evaluateExpression, evaluateExpression, evaluateExpression, evaluateExpression, evaluateExpression, evaluateExpression, getBeanFactory, getEvaluationContext, getEvaluationContext, getMessageBuilderFactory, onInit, setBeanFactory, setConversionService

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Details

ExpressionEvaluatingMessageProcessor

public ExpressionEvaluatingMessageProcessor(Expression expression)

Create an ExpressionEvaluatingMessageProcessor for the given expression.

Parameters:

expression - The expression.

ExpressionEvaluatingMessageProcessor

public ExpressionEvaluatingMessageProcessor(Expression expression, @Nullable Class<T> expectedType)

Create an ExpressionEvaluatingMessageProcessor for the given expression and expected type for its evaluation result.

Parameters:

expression - The expression.

expectedType - The expected type.

ExpressionEvaluatingMessageProcessor

public ExpressionEvaluatingMessageProcessor(String expression)

Create an ExpressionEvaluatingMessageProcessor for the given expression.

Parameters:

expression - a SpEL expression to evaluate.

Since:

5.0

ExpressionEvaluatingMessageProcessor

public ExpressionEvaluatingMessageProcessor(String expression, @Nullable Class<T> expectedType)

Construct ExpressionEvaluatingMessageProcessor for the provided SpEL expression and expected result type.

Parameters:

expression - a SpEL expression to evaluate.

expectedType - the expected result type.

Since:

5.0

Method Details

processMessage

public T processMessage(Message<?> message)

Processes the Message by evaluating the expression with that Message as the root object. The expression evaluation result Object will be returned.

Specified by:

processMessage in interface MessageProcessor<T>

Specified by:

processMessage in class AbstractMessageProcessor<T>

Parameters:

message - The message.

Returns:

The result of processing the message.

toString

public String toString()

Overrides:

toString in class Object