org.apache.pig.tools.cmdline

Class CmdLineParser

java.lang.Object

org.apache.pig.tools.cmdline.CmdLineParser

public class CmdLineParser
extends Object

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	CmdLineParser.ValueExpected

Field Summary

Fields

Modifier and Type	Field and Description
static char	EndOfOpts

Constructor Summary

Constructors

Constructor and Description
CmdLineParser(String[] args)

Method Summary

Methods

Modifier and Type	Method and Description
char	getNextOpt() Get the next option.
String[]	getRemainingArgs() Get any remaining arguments.
Integer	getValInt() Get the value, as an Integer.
String	getValStr() Get the value, as a string.
void	registerOpt(char c, String s, CmdLineParser.ValueExpected ve) Register a command line option.

Methods inherited from class java.lang.Object

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

Field Detail

EndOfOpts

public static final char EndOfOpts

See Also:

Constant Field Values

Constructor Detail

CmdLineParser

public CmdLineParser(String[] args)

Parameters:

args - String array of arguments passed to the program.

Method Detail

registerOpt

public void registerOpt(char c,
               String s,
               CmdLineParser.ValueExpected ve)

Register a command line option.

Parameters:

c - Single character designator for this option. It cannot be '-'.

s - Full word designator for this option. This can be null, in which case no long designator will exist for this option.

ve - If REQUIRED, a value will be expected with this option. If OPTIONAL a value will be accepted if it is seen.

Throws:

AssertionError - if there is no short option, or if this option has already been used.

getNextOpt

public char getNextOpt()
                throws ParseException

Get the next option.

Returns:

The short designator for the next argument. If there are no more arguments than the special designator CmdLineParser.EndOfOpts will be returned.

Throws:

ParseException - if an unknown option is found or an option that expects a value does not have one or a value that does not expect a value does have one.

getRemainingArgs

public String[] getRemainingArgs()

Get any remaining arguments.

Returns:

In general this function will null. Only if the caller passed a '-' or '--' followed by other arguments. In that case the remainder of the args array will be returned.

getValStr

public String getValStr()

Get the value, as a string.

Returns:

The value associated with the current option. If there is no value, then null will be returned.

getValInt

public Integer getValInt()
                  throws NumberFormatException

Get the value, as an Integer.

Returns:

The value associated with the current option. If there is not value, then null will be returned.

Throws:

NumberFormatException - if the value cannot be converted to an integer.