org.jboss.logmanager.config

Interface ValueExpression<T>

public interface ValueExpression<T>

Represents a possible value expression. A value is said to be an expression if it matches a ${system.property:DEFAULT_VALUE} pattern.

Author:

James R. Perkins

Nested Class Summary

Nested Classes

Modifier and Type	Interface and Description
static interface	ValueExpression.Resolver<T> Resolves the value expression from an expression.

Field Summary

Fields

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

Method Summary

Methods

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()

Field Detail

NULL_STRING_EXPRESSION

static final ValueExpression<String> NULL_STRING_EXPRESSION

NULL_BOOLEAN_EXPRESSION

static final ValueExpression<Boolean> NULL_BOOLEAN_EXPRESSION

STRING_RESOLVER

static final ValueExpression.Resolver<String> STRING_RESOLVER

BOOLEAN_RESOLVER

static final ValueExpression.Resolver<Boolean> BOOLEAN_RESOLVER

Method Detail

getResolvedValue

T getResolvedValue()

The resolved value.

If this is an 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.

Returns:

the resolved value

isExpression

boolean isExpression()

Checks whether this is an expression or not.

Returns:

true if this is an expression, otherwise false

getValue

String getValue()

Gets the value of the value which may or may not be an expression.

Returns:

the value

toString

String toString()

Overrides:

toString in class Object