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 14:32:21 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

All Methods Static Methods Instance Methods Concrete 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, java.util.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(java.lang.String expression, Instances input)` Filters the input dataset against the provided expression.
`java.util.Hashtable`	`getAttributeTypes()` Returns the current attribute - attribute-type relation in use.
`java.lang.Boolean`	`getResult()` Returns the result of the evaluation.
`java.util.HashMap`	`getSymbols()` Returns the current variable - value relation in use.
`static java.lang.Object`	`getValue(Instance instance, int index)` Returns either a String object for nominal attributes or a Double for numeric ones.
`static void`	`main(java.lang.String[] args)` Runs the parser from commandline.
`short[][]`	`production_table()` Access to production table.
`short[][]`	`reduce_table()` Access to `reduce_goto` table.
`void`	`setAttributeTypes(java.util.Hashtable value)` Sets the attribute - attribute-type relation to use.
`void`	`setResult(java.lang.Boolean value)` Sets the result of the evaluation.
`void`	`setSymbols(java.util.HashMap 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,
                                         java.util.Stack stack,
                                         int top)
                                  throws java.lang.Exception
```
    Invoke a user supplied parse action.
    
    Specified by:
    
    do_action in class java_cup.runtime.lr_parser
    
    Throws:
    
    java.lang.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(java.util.HashMap value)
```
    Sets the variable - value relation to use.
    
    Parameters:
    
    value - the variable-value relation
  - getSymbols
```
public java.util.HashMap getSymbols()
```
    Returns the current variable - value relation in use.
    
    Returns:
    
    the variable-value relation
  - setAttributeTypes
```
public void setAttributeTypes(java.util.Hashtable value)
```
    Sets the attribute - attribute-type relation to use.
    
    Parameters:
    
    value - the att - att-type relation
  - getAttributeTypes
```
public java.util.Hashtable getAttributeTypes()
```
    Returns the current attribute - attribute-type relation in use.
    
    Returns:
    
    the att - att-type relation
  - setResult
```
public void setResult(java.lang.Boolean value)
```
    Sets the result of the evaluation.
    
    Parameters:
    
    value - the result
  - getResult
```
public java.lang.Boolean getResult()
```
    Returns the result of the evaluation.
    
    Returns:
    
    the result
  - getValue
```
public static java.lang.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(java.lang.String expression,
                               Instances input)
                        throws java.lang.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:
    
    java.lang.Exception - if parsing fails
  - main
```
public static void main(java.lang.String[] args)
                 throws java.lang.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:
    
    java.lang.Exception - if something goes wrong

Class Parser

Field Summary

Fields inherited from class java_cup.runtime.lr_parser

Constructor Summary

Method Summary

Methods inherited from class java_cup.runtime.lr_parser

Methods inherited from class java.lang.Object

Constructor Detail

Parser

Parser

Parser

Method Detail

production_table

action_table

reduce_table

do_action

start_state

start_production

EOF_sym

error_sym

setSymbols

getSymbols

setAttributeTypes

getAttributeTypes

setResult

getResult

getValue

filter

main