public class StandardBeanExpressionResolver extends java.lang.Object implements BeanExpressionResolver
BeanExpressionResolver
interface, parsing and evaluating Spring EL using Spring's expression module.ExpressionParser
,
SpelExpressionParser
,
StandardEvaluationContext
Modifier and Type | Field and Description |
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static java.lang.String |
DEFAULT_EXPRESSION_PREFIX
Default expression prefix: "#{"
|
static java.lang.String |
DEFAULT_EXPRESSION_SUFFIX
Default expression suffix: "}"
|
Constructor and Description |
---|
StandardBeanExpressionResolver()
Create a new
StandardBeanExpressionResolver with default settings. |
StandardBeanExpressionResolver(java.lang.ClassLoader beanClassLoader)
Create a new
StandardBeanExpressionResolver with the given bean class loader,
using it as the basis for expression compilation. |
Modifier and Type | Method and Description |
---|---|
protected void |
customizeEvaluationContext(StandardEvaluationContext evalContext)
Template method for customizing the expression evaluation context.
|
java.lang.Object |
evaluate(java.lang.String value,
BeanExpressionContext evalContext)
Evaluate the given value as an expression, if applicable;
return the value as-is otherwise.
|
void |
setExpressionParser(ExpressionParser expressionParser)
Specify the EL parser to use for expression parsing.
|
void |
setExpressionPrefix(java.lang.String expressionPrefix)
Set the prefix that an expression string starts with.
|
void |
setExpressionSuffix(java.lang.String expressionSuffix)
Set the suffix that an expression string ends with.
|
public static final java.lang.String DEFAULT_EXPRESSION_PREFIX
public static final java.lang.String DEFAULT_EXPRESSION_SUFFIX
public StandardBeanExpressionResolver()
StandardBeanExpressionResolver
with default settings.public StandardBeanExpressionResolver(@Nullable java.lang.ClassLoader beanClassLoader)
StandardBeanExpressionResolver
with the given bean class loader,
using it as the basis for expression compilation.beanClassLoader
- the factory's bean class loaderpublic void setExpressionPrefix(java.lang.String expressionPrefix)
DEFAULT_EXPRESSION_PREFIX
public void setExpressionSuffix(java.lang.String expressionSuffix)
DEFAULT_EXPRESSION_SUFFIX
public void setExpressionParser(ExpressionParser expressionParser)
Default is a SpelExpressionParser
,
compatible with standard Unified EL style expression syntax.
@Nullable public java.lang.Object evaluate(@Nullable java.lang.String value, BeanExpressionContext evalContext) throws BeansException
BeanExpressionResolver
evaluate
in interface BeanExpressionResolver
value
- the value to checkevalContext
- the evaluation contextBeansException
- if evaluation failedprotected void customizeEvaluationContext(StandardEvaluationContext evalContext)
The default implementation is empty.