Java 类org.springframework.beans.factory.BeanExpressionException 实例源码

/**
 * Chained three levels.
 */
@Test
public void chainedError2() {

    final ErrorResponse response = new ErrorResponse(new BeanExpressionException("ahem", new IllegalStateException(new GeneralSecurityException())), mock(UriInfo.class), true);
    assertNotNull(response.getStackTrace());
    assertNotNull(response.getCause());
}

public Object evaluate(String value, BeanExpressionContext evalContext) throws BeansException {
    if (!StringUtils.hasLength(value)) {
        return value;
    }
    try {
        Expression expr = this.expressionCache.get(value);
        if (expr == null) {
            expr = this.expressionParser.parseExpression(value, this.beanExpressionParserContext);
            this.expressionCache.put(value, expr);
        }
        StandardEvaluationContext sec = this.evaluationCache.get(evalContext);
        if (sec == null) {
            sec = new StandardEvaluationContext();
            sec.setRootObject(evalContext);
            sec.addPropertyAccessor(new BeanExpressionContextAccessor());
            sec.addPropertyAccessor(new BeanFactoryAccessor());
            sec.addPropertyAccessor(new MapAccessor());
            sec.addPropertyAccessor(new EnvironmentAccessor());
            sec.setBeanResolver(new BeanFactoryResolver(evalContext.getBeanFactory()));
            sec.setTypeLocator(new StandardTypeLocator(evalContext.getBeanFactory().getBeanClassLoader()));
            ConversionService conversionService = evalContext.getBeanFactory().getConversionService();
            if (conversionService != null) {
                sec.setTypeConverter(new StandardTypeConverter(conversionService));
            }
            customizeEvaluationContext(sec);
            this.evaluationCache.put(evalContext, sec);
        }
        return expr.getValue(sec);
    }
    catch (Exception ex) {
        throw new BeanExpressionException("Expression parsing failed", ex);
    }
}