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

String

valueForSymbol(String symbolName) Returns the value for the symbol, or null if this provider can not provide a value.

Method Detail

valueForSymbol

String valueForSymbol(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