org.unix4j.variable

Class SimpleVariableResolver

java.lang.Object

org.unix4j.variable.SimpleVariableResolver

All Implemented Interfaces:

VariableResolver

public class SimpleVariableResolver
extends Object
implements VariableResolver

Simple variable resolver implementation backed by a map of variable names to values. The variable name is a key in the backing name-to-value map (including the dollar sign of the variable name). If a map is already available and the variable names can be derived from the map keys, MapVariableResolver may be the better alternative.

Constructor Summary

Constructors

Constructor and Description
SimpleVariableResolver()

Method Summary

Modifier and Type	Method and Description
Object	getValue(String name) Returns the value currently set for the variable given by its name, or null if no such variable exists.
Object	setValue(String name, Object value) Sets the specified value for the variable with the given name.
String	toString()

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

SimpleVariableResolver

public SimpleVariableResolver()

Method Detail

setValue

public Object setValue(String name,
                       Object value)

Sets the specified value for the variable with the given name. If the value is null, the variable is cleared. Returns the old value held by the value before setting it, or null if no such variable existed.

Parameters:

name - the variable name

value - the new value for the variable, null to clear the variable

Returns:

the old value held by the variable before setting it, or null if the variable did not exist before

getValue

public Object getValue(String name)

Description copied from interface: VariableResolver

Returns the value currently set for the variable given by its name, or null if no such variable exists.

Specified by:

getValue in interface VariableResolver

Parameters:

name - the variable name

Returns:

the value of the variable, or null if the variable does not exist

toString

public String toString()

Overrides:

toString in class Object