net.dpml.cli.commandline
Class PreferencesCommandLine

java.lang.Object
  extended bynet.dpml.cli.commandline.CommandLineImpl
      extended bynet.dpml.cli.commandline.PreferencesCommandLine
All Implemented Interfaces:
CommandLine

public class PreferencesCommandLine
extends CommandLineImpl

A CommandLine implementation using the Preferences API, useful when constructing a complex DefaultingCommandLine This implementation uses the children of a single preference node to populate the CommandLine. Options are keyed from their preferred name and presence in the Preferences object is taken as presence in the CommandLine. Argument values are taken from the Preference value and are optionally separated using the separator char defined, at construction time. Switch values can be specified using a simple value of true or false; obviously this means that Switches with Arguments are not supported by this implementation.

Version:
1.0.0
Author:
Digital Product Meta Library
See Also:
Preferences, DefaultingCommandLine, Option.getPreferredName()

Constructor Summary
PreferencesCommandLine(Option root, Preferences preferences)
          Creates a new PreferencesCommandLine using the specified root Option and Preferences node.
PreferencesCommandLine(Option root, Preferences preferences, char separator)
          Creates a new PreferencesCommandLine using the specified root Option, Preferences node and value separator.
 
Method Summary
 Option getOption(String trigger)
          Finds the Option with the specified trigger
 List getOptions()
          Retrieves a list of all Options found in this CommandLine
 Set getOptionTriggers()
          Retrieves a list of all Option triggers found in this CommandLine
 Set getProperties()
          Retrieves the set of all property names associated with this CommandLine
 String getProperty(String property, String defaultValue)
          Retrieves the value associated with the specified property
 Boolean getSwitch(Option option, Boolean defaultValue)
          Retrieves the Boolean value associated with the specified Switch
 List getValues(Option option, List defaultValues)
          Retrieves the Argument values associated with the specified Option
 boolean hasOption(Option option)
          Detects the presence of an option in this CommandLine.
 
Methods inherited from class net.dpml.cli.commandline.CommandLineImpl
getOptionCount, getOptionCount, getProperty, getSwitch, getSwitch, getSwitch, getValue, getValue, getValue, getValue, getValues, getValues, getValues, hasOption
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Constructor Detail

PreferencesCommandLine

public PreferencesCommandLine(Option root,
                              Preferences preferences)
Creates a new PreferencesCommandLine using the specified root Option and Preferences node. Argument values will be separated using the char 0.

Parameters:
root - the CommandLine's root Option
preferences - the Preferences node to get values from

PreferencesCommandLine

public PreferencesCommandLine(Option root,
                              Preferences preferences,
                              char separator)
Creates a new PreferencesCommandLine using the specified root Option, Preferences node and value separator.

Parameters:
root - the CommandLine's root Option
preferences - the Preferences node to get values from
separator - the character to split argument values
Method Detail

hasOption

public boolean hasOption(Option option)
Detects the presence of an option in this CommandLine.

Parameters:
option - the Option to search for
Returns:
true iff the option is present

getOption

public Option getOption(String trigger)
Finds the Option with the specified trigger

Parameters:
trigger - the name of the option to retrieve
Returns:
the Option matching the trigger or null if none exists

getValues

public List getValues(Option option,
                      List defaultValues)
Retrieves the Argument values associated with the specified Option

Parameters:
option - the Option associated with the values
defaultValues - the result to return if no values are found
Returns:
a list of values or defaultValues if none are found

getSwitch

public Boolean getSwitch(Option option,
                         Boolean defaultValue)
Retrieves the Boolean value associated with the specified Switch

Parameters:
option - the Option associated with the value
defaultValue - the Boolean to use if none match
Returns:
the Boolean associated with option or defaultValue if none exists

getProperty

public String getProperty(String property,
                          String defaultValue)
Retrieves the value associated with the specified property

Parameters:
property - the property name to lookup
defaultValue - the value to use if no other is found
Returns:
the value of the property or defaultValue

getProperties

public Set getProperties()
Retrieves the set of all property names associated with this CommandLine

Returns:
a none null set of property names

getOptions

public List getOptions()
Retrieves a list of all Options found in this CommandLine

Returns:
a none null list of Options

getOptionTriggers

public Set getOptionTriggers()
Retrieves a list of all Option triggers found in this CommandLine

Returns:
a none null list of Option triggers