Package org.springframework.integration.aggregator

Class ExpressionEvaluatingMessageListProcessor

java.lang.Object

org.springframework.integration.util.AbstractExpressionEvaluator

org.springframework.integration.aggregator.ExpressionEvaluatingMessageListProcessor

All Implemented Interfaces:

Aware, BeanFactoryAware, InitializingBean, MessageListProcessor

public class ExpressionEvaluatingMessageListProcessor
extends AbstractExpressionEvaluator
implements MessageListProcessor

A base class for aggregators that evaluates a SpEL expression with the message list as the root object within the evaluation context.

Since:

2.0

Author:

Dave Syer, Artem Bilan

Field Summary

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

EXPRESSION_PARSER, logger

Constructor Summary

Constructors

Constructor	Description
ExpressionEvaluatingMessageListProcessor(String expression)	Construct ExpressionEvaluatingMessageListProcessor for the provided SpEL expression and expected result type.
ExpressionEvaluatingMessageListProcessor(String expression, Class<?> expectedType)	Construct ExpressionEvaluatingMessageListProcessor for the provided SpEL expression and expected result type.
ExpressionEvaluatingMessageListProcessor(Expression expression)	Construct ExpressionEvaluatingMessageListProcessor for the provided expression.
ExpressionEvaluatingMessageListProcessor(Expression expression, Class<?> expectedType)	Construct ExpressionEvaluatingMessageListProcessor for the provided expression and expected result type.

Method Summary

Modifier and Type	Method	Description
Object	process(Collection<? extends Message<?>> messages)	Processes the Message by evaluating the expression with that Message as the root object.
void	setExpectedType(Class<?> expectedType)	Set the result type expected from evaluation of the expression.

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, toString, wait, wait, wait

Constructor Details

ExpressionEvaluatingMessageListProcessor

public ExpressionEvaluatingMessageListProcessor(String expression,
 Class<?> expectedType)

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

Parameters:

expression - a SpEL expression to evaluate in process(Collection).

expectedType - an expected result type.

Since:

5.0

ExpressionEvaluatingMessageListProcessor

public ExpressionEvaluatingMessageListProcessor(String expression)

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

Parameters:

expression - a SpEL expression to evaluate in process(Collection).

Since:

5.0

ExpressionEvaluatingMessageListProcessor

public ExpressionEvaluatingMessageListProcessor(Expression expression,
 Class<?> expectedType)

Construct ExpressionEvaluatingMessageListProcessor for the provided expression and expected result type.

Parameters:

expression - an expression to evaluate in process(Collection).

expectedType - an expected result type.

Since:

5.0

ExpressionEvaluatingMessageListProcessor

public ExpressionEvaluatingMessageListProcessor(Expression expression)

Construct ExpressionEvaluatingMessageListProcessor for the provided expression.

Parameters:

expression - an expression to evaluate in process(Collection).

Since:

5.0

Method Details

setExpectedType

public void setExpectedType(Class<?> expectedType)

Set the result type expected from evaluation of the expression.

Parameters:

expectedType - The expected type.

process

public Object process(Collection<? extends Message<?>> messages)

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

Specified by:

process in interface MessageListProcessor