Package com.broadleafcommerce.rulesengine.expression.context.factory

Class CachingStdEvaluationContextFactory

java.lang.Object

com.broadleafcommerce.rulesengine.expression.context.factory.CachingStdEvaluationContextFactory

All Implemented Interfaces:

EvaluationContextFactory

public class CachingStdEvaluationContextFactory
extends Object
implements EvaluationContextFactory

Default implementation of EvaluationContextFactory that caches the EvaluationContexts it creates. By default, the key is generated from the root object and the ExpressionContext. The factory uses a Supplier with the generic type StandardEvaluationContext to generate new contexts.

The EvaluationContexts created by this factory support SpEL expressions evaluations on concrete objects or Maps.

Author:

Nathan Moore (nathanmoore).

See Also:

• SPeL documentation
• MapAccessor
• MapAccessor

Field Summary

Fields

Modifier and Type	Field	Description
protected static final Map<Serializable,org.springframework.expression.EvaluationContext>	CONTEXT_CACHE
protected final Map<String,Object>	defaultExpressionVariables
protected final List<org.springframework.expression.PropertyAccessor>	defaultPropertyAccessors
protected final Supplier<org.springframework.expression.spel.support.StandardEvaluationContext>	evaluationContextSupplier

Constructor Summary

Constructors

Constructor	Description
CachingStdEvaluationContextFactory(List<org.springframework.expression.PropertyAccessor> blDefaultPropertyAccessors, Map<String,Object> blDefaultExpressionVariables, Supplier<org.springframework.expression.spel.support.StandardEvaluationContext> blEvaluationContextSupplier)

Method Summary

Modifier and Type	Method	Description
protected org.springframework.expression.EvaluationContext	buildEvaluationContext(Object rootObject, ExpressionContext expressionContext)
org.springframework.expression.EvaluationContext	getEvaluationContext(Object rootObject, ExpressionContext expressionContext)	Gets an EvaluationContext.

Methods inherited from class java.lang.Object

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

Field Details

CONTEXT_CACHE

protected static final Map<Serializable,org.springframework.expression.EvaluationContext> CONTEXT_CACHE

evaluationContextSupplier

protected final Supplier<org.springframework.expression.spel.support.StandardEvaluationContext> evaluationContextSupplier

defaultPropertyAccessors

protected final List<org.springframework.expression.PropertyAccessor> defaultPropertyAccessors

defaultExpressionVariables

protected final Map<String,Object> defaultExpressionVariables

Constructor Details

CachingStdEvaluationContextFactory

public CachingStdEvaluationContextFactory(List<org.springframework.expression.PropertyAccessor> blDefaultPropertyAccessors,
 Map<String,Object> blDefaultExpressionVariables,
 Supplier<org.springframework.expression.spel.support.StandardEvaluationContext> blEvaluationContextSupplier)

Method Details

getEvaluationContext

public org.springframework.expression.EvaluationContext getEvaluationContext(Object rootObject,
 ExpressionContext expressionContext)

Gets an EvaluationContext.

Specified by:

getEvaluationContext in interface EvaluationContextFactory

Parameters:

rootObject - root object to evaluate an expression against

expressionContext - DTO for data required to evaluate an expression

Returns:

an EvaluationContext

buildEvaluationContext

protected org.springframework.expression.EvaluationContext buildEvaluationContext(Object rootObject,
 ExpressionContext expressionContext)