org.apache.tapestry5.ioc.services
Interface SymbolProvider
- All Known Implementing Classes:
- ClasspathResourceSymbolProvider, ContextResourceSymbolProvider, MapSymbolProvider, ResourceSymbolProvider, ServletContextSymbolProvider, SingleKeySymbolProvider, SystemEnvSymbolProvider, SystemPropertiesSymbolProvider
@UsesMappedConfiguration(value=java.lang.String.class)
public interface SymbolProvider
A provider of values for symbols, used by the SymbolSource
service.
This is the service interface for the FactoryDefaults and ApplicationDefaults services; each of these takes a
configuration mapping symbols to their values.
Method Summary |
java.lang.String |
valueForSymbol(java.lang.String symbolName)
Returns the value for the symbol, or null if this provider can not provide a value. |
valueForSymbol
java.lang.String valueForSymbol(java.lang.String symbolName)
- Returns the value for the symbol, or null if this provider can not provide a value. The value itself may contain
symbols that will be recursively expanded.
- Parameters:
symbolName
-
- Returns:
- the value or null
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