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package org.springframework.beans.factory.config;

import org.springframework.beans.BeansException;
import org.springframework.lang.Nullable;

Strategy interface for resolving a value through evaluating it as an expression, if applicable.

A raw BeanFactory does not contain a default implementation of this strategy. However, ApplicationContext implementations will provide expression support out of the box.

Author:Juergen Hoeller
Since:3.0
/** * Strategy interface for resolving a value through evaluating it * as an expression, if applicable. * * <p>A raw {@link org.springframework.beans.factory.BeanFactory} does not * contain a default implementation of this strategy. However, * {@link org.springframework.context.ApplicationContext} implementations * will provide expression support out of the box. * * @author Juergen Hoeller * @since 3.0 */
public interface BeanExpressionResolver {
Evaluate the given value as an expression, if applicable; return the value as-is otherwise.
Params:
  • value – the value to check
  • evalContext – the evaluation context
Throws:
Returns:the resolved value (potentially the given value as-is)
/** * Evaluate the given value as an expression, if applicable; * return the value as-is otherwise. * @param value the value to check * @param evalContext the evaluation context * @return the resolved value (potentially the given value as-is) * @throws BeansException if evaluation failed */
@Nullable Object evaluate(@Nullable String value, BeanExpressionContext evalContext) throws BeansException; }