org.apache.commons.cli
Class PatternOptionBuilder

java.lang.Object
  org.apache.commons.cli.PatternOptionBuilder

public class PatternOptionBuilder

extends Object

Allows Options to be created from a single String. The pattern contains various single character flags and via an optional punctuation character, their expected type.

a	-a flag
b@	-b [classname]
c>	-c [filename]
d+	-d [classname] (creates object via empty contructor)
e%	-e [number] (creates Double/Long instance depeding on existing of a '.')
f/	-f [url]
g:	-g [string]

For example, the following allows command line flags of '-v -p string-value -f /dir/file'.

Options options = PatternOptionBuilder.parsePattern("vp:f/");

TODO These need to break out to OptionType and also to be pluggable.

Version:

$Revision: 542144 $

Author:

Henri Yandell (bayard @ generationjava.com)

Field Summary

static Class	CLASS_VALUE Class class
static Class	DATE_VALUE Date class
static Class	EXISTING_FILE_VALUE FileInputStream class
static Class	FILE_VALUE File class
static Class	FILES_VALUE File array class
static Class	NUMBER_VALUE Number class
static Class	OBJECT_VALUE Object class
static Class	STRING_VALUE String class
static Class	URL_VALUE URL class

Constructor Summary

PatternOptionBuilder()

Method Summary

static Object	getValueClass(char ch) Retrieve the class that ch represents.
static boolean	isValueCode(char ch) Returns whether ch is a value code, i.e.
static Options	parsePattern(String pattern) Returns the Options instance represented by pattern.

Methods inherited from class java.lang.Object

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

Field Detail

STRING_VALUE

public static final Class STRING_VALUE

String class

OBJECT_VALUE

public static final Class OBJECT_VALUE

Object class

NUMBER_VALUE

public static final Class NUMBER_VALUE

Number class

DATE_VALUE

public static final Class DATE_VALUE

Date class

CLASS_VALUE

public static final Class CLASS_VALUE

Class class

EXISTING_FILE_VALUE

public static final Class EXISTING_FILE_VALUE

FileInputStream class

FILE_VALUE

public static final Class FILE_VALUE

File class

FILES_VALUE

public static final Class FILES_VALUE

File array class

URL_VALUE

public static final Class URL_VALUE

URL class

Constructor Detail

PatternOptionBuilder

public PatternOptionBuilder()

Method Detail

getValueClass

public static Object getValueClass(char ch)

Retrieve the class that ch represents.

Parameters:

ch - the specified character

Returns:

The class that ch represents

isValueCode

public static boolean isValueCode(char ch)

Returns whether ch is a value code, i.e. whether it represents a class in a pattern.

Parameters:

ch - the specified character

Returns:

true if ch is a value code, otherwise false.

parsePattern

public static Options parsePattern(String pattern)

Returns the Options instance represented by pattern.

Parameters:

pattern - the pattern string

Returns:

The Options instance