public interface ValueExpression<T>
${system.property:DEFAULT_VALUE}
pattern.Modifier and Type | Interface and Description |
---|---|
static interface |
ValueExpression.Resolver<T>
Resolves the value expression from an expression.
|
Modifier and Type | Field and Description |
---|---|
static ValueExpression.Resolver<Boolean> |
BOOLEAN_RESOLVER |
static ValueExpression<Boolean> |
NULL_BOOLEAN_EXPRESSION |
static ValueExpression<String> |
NULL_STRING_EXPRESSION |
static ValueExpression.Resolver<String> |
STRING_RESOLVER |
Modifier and Type | Method and Description |
---|---|
T |
getResolvedValue()
The resolved value.
|
String |
getValue()
Gets the value of the value which may or may not be an
expression . |
boolean |
isExpression()
Checks whether this is an expression or not.
|
String |
toString() |
static final ValueExpression<String> NULL_STRING_EXPRESSION
static final ValueExpression<Boolean> NULL_BOOLEAN_EXPRESSION
static final ValueExpression.Resolver<String> STRING_RESOLVER
static final ValueExpression.Resolver<Boolean> BOOLEAN_RESOLVER
T getResolvedValue()
expression
the resolved value will be the value from a system property or
the default value from the expression if the system property is not set.
If this is not an expression
the value returned will be the non-expression value
or null
if allowed for the property.boolean isExpression()
true
if this is an expression, otherwise false
String getValue()
expression
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