ConfigurationSource (Azure SDK for Java Reference Documentation)

Functional Interface:

This is a functional interface and can therefore be used as the assignment target for a lambda expression or method reference.
```
@FunctionalInterface
public interface ConfigurationSource
```
Configuration property source which provides configuration values from a specific place. Samples may include properties file supported by frameworks or other source. Note that environment configuration (environment variables and system properties) are supported by default and don't need a source implementation.

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`Map<String,String>`	`getProperties(String source)`	Returns all properties (name and value) which names start with given path.

- Method Detail
  - getProperties
```
Map<String,String> getProperties(String source)
```
    Returns all properties (name and value) which names start with given path. Null (or empty) path indicate that all properties should be returned. Example:
    With following configuration properties:
    
    azure.sdk.foo = 1
    
    azure.sdk.bar.baz = 2
    
    ConfigurationSource implementation must the following behavior:
    
    getProperties(null must return both properties
    
    getProperties("azure.sdk") must return both properties
    
    getProperties("azure.sdk.foo") must return {"azure.sdk.foo", "1"}
    
    getProperties("azure.sdk.ba") must return empty map
    Parameters:
    
    source - property name prefix
    
    Returns:
    
    Map of properties under given path.