ca.sqlpower.wabit
Class SystemPropertiesVariableContext

java.lang.Object
  ca.sqlpower.wabit.SystemPropertiesVariableContext

All Implemented Interfaces:

VariableContext

public class SystemPropertiesVariableContext
extends java.lang.Object
implements VariableContext

Provides all the Java system properties as Wabit variables. Note that is is technically possible (but unusual and not a recommended practice) to create system properties whose keys are not an instance of String. These values will not appear, and cannot be accessed, in this WabitVariables view of the system properties.

Constructor Summary

SystemPropertiesVariableContext()

Method Summary

java.util.Set<java.lang.String>	getVariableNames() Returns the set of all defined variable names in this context.
java.lang.Object	getVariableValue(java.lang.String name, java.lang.Object defaultValue) Returns the value of the named variable, or the given default value if the variable is not defined.

Methods inherited from class java.lang.Object

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

Constructor Detail

SystemPropertiesVariableContext

public SystemPropertiesVariableContext()

Method Detail

getVariableNames

public java.util.Set<java.lang.String> getVariableNames()

Description copied from interface: VariableContext

Returns the set of all defined variable names in this context.

Specified by:

getVariableNames in interface VariableContext

getVariableValue

public java.lang.Object getVariableValue(java.lang.String name,
                                         java.lang.Object defaultValue)

Description copied from interface: VariableContext

Returns the value of the named variable, or the given default value if the variable is not defined. If you want a reliable way to find out if a variable is defined, look it up in the set returned by VariableContext.getVariableNames().

Specified by:

getVariableValue in interface VariableContext

Parameters:

name - The name of the variable

defaultValue - The value to return if the variable is not defined

Returns:

The value of the variable.