SystemPropertiesSymbolProvider (Tapestry API - 5.7.0)

java.lang.Object
- org.apache.tapestry5.ioc.internal.services.SystemPropertiesSymbolProvider

All Implemented Interfaces:

SymbolProvider
```
public class SystemPropertiesSymbolProvider
extends Object
implements SymbolProvider
```
Obtains symbol values from JVM System properties. This implementation is usually ordered first, so that explicit overrides, provided as JVM system properties, can take effect.

Constructor Summary

Constructors
Constructor Description

SystemPropertiesSymbolProvider()

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`String`	`valueForSymbol(String symbolName)`	Returns the value for the symbol, or null if this provider can not provide a value.

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Constructor Detail
  - SystemPropertiesSymbolProvider
```
public SystemPropertiesSymbolProvider()
```
- Method Detail
  - valueForSymbol
```
public String valueForSymbol(String symbolName)
```
    Description copied from interface: SymbolProvider
    
    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.
    
    Specified by:
    
    valueForSymbol in interface SymbolProvider
    
    Returns:
    
    the value or null