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 SimpleEvaluationContext	createSimpleEvaluationContext() Used to create a context with no BeanFactory, usually in tests.
static SimpleEvaluationContext	createSimpleEvaluationContext(BeanFactory beanFactory) Obtains the context from the beanFactory if not null; emits a warning if the beanFactory is null.
static StandardEvaluationContext	createStandardEvaluationContext() Used to create a context with no BeanFactory, usually in tests.
static StandardEvaluationContext	createStandardEvaluationContext(BeanFactory beanFactory) Obtains the context from the beanFactory if not null; emits a warning if the beanFactory is null.
static File	expressionToFile(Expression expression, EvaluationContext evaluationContext, Message<?> message, String propertyName) Evaluate an expression and return a File object; the expression can evaluate to a String or File.
static Expression	intExpression(String expression) Return a ValueExpression for a simple literal, otherwise a SpelExpression.
static 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 StandardEvaluationContext createStandardEvaluationContext()

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

Returns:

The evaluation context.

createSimpleEvaluationContext

public static SimpleEvaluationContext createSimpleEvaluationContext()

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

Returns:

The evaluation context.

Since:

4.3.15

createStandardEvaluationContext

public static StandardEvaluationContext createStandardEvaluationContext(@Nullable
                                                                        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.

createSimpleEvaluationContext

public static SimpleEvaluationContext createSimpleEvaluationContext(@Nullable
                                                                    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.

Since:

4.3.15

expressionToFile

public static File expressionToFile(Expression expression,
                                    EvaluationContext evaluationContext,
                                    @Nullable
                                    Message<?> message,
                                    String propertyName)

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).

propertyName - the property name the expression is evaluated for.

Returns:

the File.

Since:

5.0

intExpression

public static 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 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