StandardConstructor.ConstructEnv

java.lang.Object
- org.snakeyaml.engine.v2.constructor.ConstructScalar
- - org.snakeyaml.engine.v2.constructor.StandardConstructor.ConstructEnv

All Implemented Interfaces:

ConstructNode

Enclosing class:

StandardConstructor
```
public class StandardConstructor.ConstructEnv
extends ConstructScalar
```
Construct scalar for format ${VARIABLE} replacing the template with the value from environment.

See Also:

Variable substitution, Variable substitution

Field Summary
- Fields inherited from class org.snakeyaml.engine.v2.constructor.ConstructScalar
  BOOL_VALUES

Constructor Summary

Constructors
Constructor Description

ConstructEnv()

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`java.lang.String`	`apply(java.lang.String name, java.lang.String separator, java.lang.String value, java.lang.String environment)`	Implement the logic for missing and unset variables
`java.lang.Object`	`construct(Node node)`	Construct a Java instance with all the properties injected when it is possible.
`java.lang.String`	`getEnv(java.lang.String key)`	Get value of the environment variable

Methods inherited from class org.snakeyaml.engine.v2.constructor.ConstructScalar
constructScalar

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

Methods inherited from interface org.snakeyaml.engine.v2.api.ConstructNode
constructRecursive

- Constructor Detail
  - ConstructEnv
```
public ConstructEnv()
```
- Method Detail
  - construct
```
public java.lang.Object construct(Node node)
```
    Description copied from interface: ConstructNode
    
    Construct a Java instance with all the properties injected when it is possible.
    
    Parameters:
    
    node - composed Node
    
    Returns:
    
    a complete Java instance or empty collection instance if it is recursive
  - apply
```
public java.lang.String apply(java.lang.String name,
                              java.lang.String separator,
                              java.lang.String value,
                              java.lang.String environment)
```
    Implement the logic for missing and unset variables
    
    Parameters:
    
    name - - variable name in the template
    
    separator - - separator in the template, can be :-, -, :?, ?
    
    value - - default value or the error in the template
    
    environment - - the value from environment for the provided variable
    
    Returns:
    
    the value to apply in the template
  - getEnv
```
public java.lang.String getEnv(java.lang.String key)
```
    Get value of the environment variable
    
    Parameters:
    
    key - - the name of the variable
    
    Returns:
    
    value or null if not set