weka.filters.unsupervised.instance.subsetbyexpression

Class Parser

java.lang.Object

java_cup.runtime.lr_parser

weka.filters.unsupervised.instance.subsetbyexpression.Parser

public class Parser
extends java_cup.runtime.lr_parser

CUP v0.11a beta 20060608 generated parser.

Version:

Wed Jun 26 14:23:38 NZST 2013

Field Summary

Fields inherited from class java_cup.runtime.lr_parser

symbolFactory

Constructor Summary

Constructors

Constructor and Description
Parser() Default constructor.
Parser(java_cup.runtime.Scanner s) Constructor which sets the default scanner.
Parser(java_cup.runtime.Scanner s, java_cup.runtime.SymbolFactory sf) Constructor which sets the default scanner.

Method Summary

Methods

Modifier and Type	Method and Description
short[][]	action_table() Access to parse-action table.
java_cup.runtime.Symbol	do_action(int act_num, java_cup.runtime.lr_parser parser, Stack stack, int top) Invoke a user supplied parse action.
int	EOF_sym() EOF Symbol index.
int	error_sym() error Symbol index.
static Instances	filter(String expression, Instances input) Filters the input dataset against the provided expression.
Hashtable<String,Integer>	getAttributeTypes() Returns the current attribute - attribute-type relation in use.
Boolean	getResult() Returns the result of the evaluation.
HashMap<String,Object>	getSymbols() Returns the current variable - value relation in use.
static Object	getValue(Instance instance, int index) Returns either a String object for nominal attributes or a Double for numeric ones.
static void	main(String[] args) Runs the parser from commandline.
short[][]	production_table() Access to production table.
short[][]	reduce_table() Access to reduce_goto table.
void	setAttributeTypes(Hashtable<String,Integer> value) Sets the attribute - attribute-type relation to use.
void	setResult(Boolean value) Sets the result of the evaluation.
void	setSymbols(HashMap<String,Object> value) Sets the variable - value relation to use.
int	start_production() Indicates start production.
int	start_state() Indicates start state.

Methods inherited from class java_cup.runtime.lr_parser

debug_message, debug_parse, debug_reduce, debug_shift, debug_stack, done_parsing, dump_stack, getScanner, getSymbolFactory, parse, report_error, report_fatal_error, scan, setScanner, syntax_error, unrecovered_syntax_error, user_init

Methods inherited from class java.lang.Object

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

Constructor Detail

Parser

public Parser()

Default constructor.

Parser

public Parser(java_cup.runtime.Scanner s)

Constructor which sets the default scanner.

Parser

public Parser(java_cup.runtime.Scanner s,
      java_cup.runtime.SymbolFactory sf)

Constructor which sets the default scanner.

Method Detail

production_table

public short[][] production_table()

Access to production table.

Specified by:

production_table in class java_cup.runtime.lr_parser

action_table

public short[][] action_table()

Access to parse-action table.

Specified by:

action_table in class java_cup.runtime.lr_parser

reduce_table

public short[][] reduce_table()

Access to reduce_goto table.

Specified by:

reduce_table in class java_cup.runtime.lr_parser

do_action

public java_cup.runtime.Symbol do_action(int act_num,
                                java_cup.runtime.lr_parser parser,
                                Stack stack,
                                int top)
                                  throws Exception

Invoke a user supplied parse action.

Specified by:

do_action in class java_cup.runtime.lr_parser

Throws:

Exception

start_state

public int start_state()

Indicates start state.

Specified by:

start_state in class java_cup.runtime.lr_parser

start_production

public int start_production()

Indicates start production.

Specified by:

start_production in class java_cup.runtime.lr_parser

EOF_sym

public int EOF_sym()

EOF Symbol index.

Specified by:

EOF_sym in class java_cup.runtime.lr_parser

error_sym

public int error_sym()

error Symbol index.

Specified by:

error_sym in class java_cup.runtime.lr_parser

setSymbols

public void setSymbols(HashMap<String,Object> value)

Sets the variable - value relation to use.

Parameters:

value - the variable-value relation

getSymbols

public HashMap<String,Object> getSymbols()

Returns the current variable - value relation in use.

Returns:

the variable-value relation

setAttributeTypes

public void setAttributeTypes(Hashtable<String,Integer> value)

Sets the attribute - attribute-type relation to use.

Parameters:

value - the att - att-type relation

getAttributeTypes

public Hashtable<String,Integer> getAttributeTypes()

Returns the current attribute - attribute-type relation in use.

Returns:

the att - att-type relation

setResult

public void setResult(Boolean value)

Sets the result of the evaluation.

Parameters:

value - the result

getResult

public Boolean getResult()

Returns the result of the evaluation.

Returns:

the result

getValue

public static Object getValue(Instance instance,
              int index)

Returns either a String object for nominal attributes or a Double for numeric ones. For all other attribute types this method throws an Exception. It also returns a Double object in case of a missing value (for all attribute types!).

Parameters:

instance - the instance to work on

index - the index of the attribute to return

Returns:

the converted value

filter

public static Instances filter(String expression,
               Instances input)
                        throws Exception

Filters the input dataset against the provided expression.

Parameters:

expression - the expression used for filtering

input - the input data

Returns:

the filtered data

Throws:

Exception - if parsing fails

main

public static void main(String[] args)
                 throws Exception

Runs the parser from commandline. Takes the following arguments:

1. expression
2. input file
3. class index (first|last|num), use 0 to ignore
4. output file

Parameters:

args - the commandline arguments

Throws:

Exception - if something goes wrong