Class 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 an AnnotatedElement.

Since:

4.2

Author:

Stephane Nicoll

See Also:

• AnnotatedElementKey

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
protected static class	CachedExpressionEvaluator.ExpressionKey	An expression key.

Constructor Summary

Constructors

Modifier	Constructor	Description
protected	CachedExpressionEvaluator()	Create a new instance with the default SpelExpressionParser.
protected	CachedExpressionEvaluator(org.springframework.expression.spel.standard.SpelExpressionParser parser)	Create a new instance with the specified SpelExpressionParser.

Method Summary

Modifier and Type	Method	Description
protected org.springframework.expression.Expression	getExpression(Map<CachedExpressionEvaluator.ExpressionKey, org.springframework.expression.Expression> cache, AnnotatedElementKey elementKey, String expression)	Return the parsed Expression for the specified SpEL expression.
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.
protected org.springframework.expression.Expression	parseExpression(String expression)	Parse the specified expression.

Methods inherited from class Object

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

Constructor Details

CachedExpressionEvaluator

protected CachedExpressionEvaluator()

Create a new instance with the default SpelExpressionParser.

CachedExpressionEvaluator

protected CachedExpressionEvaluator(org.springframework.expression.spel.standard.SpelExpressionParser parser)

Create a new instance with the specified SpelExpressionParser.

Method Details

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.

Since:

4.3

getExpression

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

Return the parsed Expression for the specified SpEL expression.

Parses the expression if it hasn't already been parsed and cached.

Parameters:

cache - the cache to use

elementKey - the AnnotatedElementKey containing the element on which the expression is defined

expression - the expression to parse

parseExpression

protected org.springframework.expression.Expression parseExpression(String expression)

Parse the specified expression.

Parameters:

expression - the expression to parse

Since:

5.3.13