SystemEnvSymbolProvider (Tapestry API - 5.9.0)

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

All Implemented Interfaces:

SymbolProvider
```
public class SystemEnvSymbolProvider
extends java.lang.Object
implements SymbolProvider
```
Provides case insensitive access to environment variables. Environment variable symbols are prefixed with "env.".

Since:

5.3

Constructor Summary

Constructors
Constructor Description

SystemEnvSymbolProvider()

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`java.lang.String`	`valueForSymbol(java.lang.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
  - SystemEnvSymbolProvider
```
public SystemEnvSymbolProvider()
```
- Method Detail
  - valueForSymbol
```
public java.lang.String valueForSymbol(java.lang.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