cn.hangsman.operationlog.expression

Class CachedExpressionEvaluator

java.lang.Object

cn.hangsman.operationlog.expression.CachedExpressionEvaluator

Direct Known Subclasses:

OperationLogExpressionEvaluator

public class CachedExpressionEvaluator
extends Object

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

Since:

4.2

Author:

Stephane Nicoll

See Also:

AnnotatedElementKey

Nested Class Summary

Nested Classes

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

Constructor Summary

Constructors

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

Method Summary

Modifier and Type	Method and Description
protected org.springframework.expression.Expression	getExpression(Map<CachedExpressionEvaluator.ExpressionKey,org.springframework.expression.Expression> cache, org.springframework.context.expression.AnnotatedElementKey elementKey, String expression) Return the Expression for the specified SpEL value
protected org.springframework.core.ParameterNameDiscoverer	getParameterNameDiscoverer() Return a shared parameter name discoverer which caches data internally.
protected org.springframework.expression.ExpressionParser	getParser() Return the TemplateAwareExpressionParser to use.

Methods inherited from class java.lang.Object

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

Constructor Detail

CachedExpressionEvaluator

protected CachedExpressionEvaluator(org.springframework.expression.ExpressionParser parser)

Create a new instance with the specified ExpressionParser.

CachedExpressionEvaluator

protected CachedExpressionEvaluator()

Create a new instance with a default SpelExpressionParser.

Method Detail

getParser

protected org.springframework.expression.ExpressionParser getParser()

Return the TemplateAwareExpressionParser 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,
                                                                  org.springframework.context.expression.AnnotatedElementKey elementKey,
                                                                  String expression)

Return the Expression for the specified SpEL value

Parse the expression if it hasn't been already.

Parameters:

cache - the cache to use

elementKey - the element on which the expression is defined

expression - the expression to parse