程序包 cn.taketoday.context.expression

类 CachedExpressionEvaluator

java.lang.Object

cn.taketoday.context.expression.CachedExpressionEvaluator

public abstract class CachedExpressionEvaluator
extends Object

Shared utility class used to evaluate and cache EL expressions that are defined on AnnotatedElement.

从以下版本开始:

4.0 2021/12/25 16:59

作者:

Harry Yang

嵌套类概要

嵌套类

修饰符和类型	类	说明
protected static class	CachedExpressionEvaluator.ExpressionKey	An expression key.

构造器概要

构造器

限定符	构造器	说明
protected	CachedExpressionEvaluator()	Create a new instance with a default SpelExpressionParser.
protected	CachedExpressionEvaluator(cn.taketoday.expression.spel.standard.SpelExpressionParser parser)	Create a new instance with the specified SpelExpressionParser.

方法概要

修饰符和类型	方法	说明
protected cn.taketoday.expression.Expression	getExpression(Map<CachedExpressionEvaluator.ExpressionKey,cn.taketoday.expression.Expression> cache, AnnotatedElementKey elementKey, String expression)	Return the Expression for the specified SpEL value
protected cn.taketoday.core.ParameterNameDiscoverer	getParameterNameDiscoverer()	Return a shared parameter name discoverer which caches data internally.
protected cn.taketoday.expression.spel.standard.SpelExpressionParser	getParser()	Return the SpelExpressionParser to use.
protected cn.taketoday.expression.Expression	parseExpression(String expression)	Parse the specified expression.

从类继承的方法 java.lang.Object

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

构造器详细资料

CachedExpressionEvaluator

protected CachedExpressionEvaluator(cn.taketoday.expression.spel.standard.SpelExpressionParser parser)

Create a new instance with the specified SpelExpressionParser.

CachedExpressionEvaluator

protected CachedExpressionEvaluator()

Create a new instance with a default SpelExpressionParser.

方法详细资料

getParser

protected cn.taketoday.expression.spel.standard.SpelExpressionParser getParser()

Return the SpelExpressionParser to use.

getParameterNameDiscoverer

protected cn.taketoday.core.ParameterNameDiscoverer getParameterNameDiscoverer()

Return a shared parameter name discoverer which caches data internally.

getExpression

protected cn.taketoday.expression.Expression getExpression(Map<CachedExpressionEvaluator.ExpressionKey,cn.taketoday.expression.Expression> cache,
 AnnotatedElementKey elementKey,
 String expression)

Return the Expression for the specified SpEL value

Parse the expression if it hasn't been already.

参数:

cache - the cache to use

elementKey - the element on which the expression is defined

expression - the expression to parse

parseExpression

protected cn.taketoday.expression.Expression parseExpression(String expression)

Parse the specified expression.

参数:

expression - the expression to parse