org.springframework.context.expression

类 CachedExpressionEvaluator

java.lang.Object

org.springframework.context.expression.CachedExpressionEvaluator

public abstract class CachedExpressionEvaluator
extends Object

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

从以下版本开始:

4.2

作者:

Stephane Nicoll

另请参阅:

AnnotatedElementKey

嵌套类概要

嵌套类

限定符和类型	类和说明
protected static class	CachedExpressionEvaluator.ExpressionKey

构造器概要

构造器

限定符	构造器和说明
protected	CachedExpressionEvaluator() Create a new instance with a default SpelExpressionParser.
protected	CachedExpressionEvaluator(org.springframework.expression.spel.standard.SpelExpressionParser parser) Create a new instance with the specified SpelExpressionParser.

方法概要

限定符和类型	方法和说明
protected org.springframework.expression.Expression	getExpression(Map<CachedExpressionEvaluator.ExpressionKey,org.springframework.expression.Expression> cache, AnnotatedElementKey elementKey, String expression) Return the Expression for the specified SpEL value Parse the expression if it hasn't been already.
protected org.springframework.core.ParameterNameDiscoverer	getParameterNameDiscoverer() Return a shared parameter name discoverer which caches data internally.
protected org.springframework.expression.spel.standard.SpelExpressionParser	getParser() Return the SpelExpressionParser to use.

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(org.springframework.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 org.springframework.expression.spel.standard.SpelExpressionParser getParser()

Return the SpelExpressionParser to use.

getParameterNameDiscoverer

protected org.springframework.core.ParameterNameDiscoverer getParameterNameDiscoverer()

Return a shared parameter name discoverer which caches data internally.

从以下版本开始:

4.3

getExpression

protected org.springframework.expression.Expression getExpression(Map<CachedExpressionEvaluator.ExpressionKey,org.springframework.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