org.springframework.integration.expression

Class ExpressionUtils

java.lang.Object

org.springframework.integration.expression.ExpressionUtils

public final class ExpressionUtils
extends Object

Utility class with static methods for helping with evaluation of SpEL expressions.

Since:

2.2

Author:

Gary Russell, Oleg Zhurakousky, Artem Bilan

Method Summary

Modifier and Type	Method and Description
static org.springframework.expression.spel.support.StandardEvaluationContext	createStandardEvaluationContext() Used to create a context with no BeanFactory, usually in tests.
static org.springframework.expression.spel.support.StandardEvaluationContext	createStandardEvaluationContext(org.springframework.beans.factory.BeanFactory beanFactory) Obtains the context from the beanFactory if not null; emits a warning if the beanFactory is null.
static File	expressionToFile(org.springframework.expression.Expression expression, org.springframework.expression.EvaluationContext evaluationContext, org.springframework.messaging.Message<?> message, String name) Evaluate an expression and return a File object; the expression can evaluate to a String or File.
static org.springframework.expression.Expression	intExpression(String expression) Return a ValueExpression for a simple literal, otherwise a SpelExpression.
static org.springframework.expression.Expression	longExpression(String expression) Return a ValueExpression for a simple literal, otherwise a SpelExpression.

Methods inherited from class java.lang.Object

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

Method Detail

createStandardEvaluationContext

public static org.springframework.expression.spel.support.StandardEvaluationContext createStandardEvaluationContext()

Used to create a context with no BeanFactory, usually in tests.

Returns:

The evaluation context.

createStandardEvaluationContext

public static org.springframework.expression.spel.support.StandardEvaluationContext createStandardEvaluationContext(org.springframework.beans.factory.BeanFactory beanFactory)

Obtains the context from the beanFactory if not null; emits a warning if the beanFactory is null.

Parameters:

beanFactory - The bean factory.

Returns:

The evaluation context.

expressionToFile

public static File expressionToFile(org.springframework.expression.Expression expression,
                                    org.springframework.expression.EvaluationContext evaluationContext,
                                    org.springframework.messaging.Message<?> message,
                                    String name)

Evaluate an expression and return a File object; the expression can evaluate to a String or File.

Parameters:

expression - the expression.

evaluationContext - the evaluation context.

message - the message (if available).

name - the name of the result of the evaluation.

Returns:

the File.

Since:

5.0

intExpression

public static org.springframework.expression.Expression intExpression(String expression)

Return a ValueExpression for a simple literal, otherwise a SpelExpression.

Parameters:

expression - the expression string.

Returns:

the expression.

Since:

5.0

longExpression

public static org.springframework.expression.Expression longExpression(String expression)

Return a ValueExpression for a simple literal, otherwise a SpelExpression.

Parameters:

expression - the expression string.

Returns:

the expression.

Since:

5.0