Package com.singularsys.jep.misc.parallelparsing

Class ParallelConfigurableParser

java.lang.Object

com.singularsys.jep.configurableparser.ConfigurableParser

com.singularsys.jep.misc.parallelparsing.ParallelConfigurableParser

All Implemented Interfaces:

JepComponent, Parser, Serializable

public class ParallelConfigurableParser
extends ConfigurableParser

A version of the ConfigurableParser that can parse expressions in multiple threads. Only the @link{#parse(Reader)} method is supported other methods are not suitable for multi-threaded use and will throw UnsupportedOperationException. The parse(Reader) method creates a new Tokenizer, GrammarParser, and new instances of each TokenFilter, uses them to parse the input.

The individual TokenMatcher and GrammarMatcher objects are assumed to be thread safe.

See Also:

• Serialized Form

Field Summary

Fields inherited from class com.singularsys.jep.configurableparser.ConfigurableParser

filters, g, gpf, jep, m, otm, stm, tf, tk

Constructor Summary

Constructors

Constructor	Description
ParallelConfigurableParser()	Default constructor with no matchers.
ParallelConfigurableParser(ConfigurableParser base)	Copy constructor reuses the TokenMatchers, TokenFilters, GrammarMatchers, TokenizerFactory, GrammarParserFactory, OperatorTokenMatcher and SymbolTokenMatcher from the base.

Method Summary

Modifier and Type	Method	Description
Node	continueParse()	Not implemented.
MultipleEquationParser	newMultipleEquationParser(Reader input)	Creates a new instance of the MultipleEquationParser to parse multiple expressions from the input.
Node	parse(Reader stream)	Parses the input stream.
void	restart(Reader stream)	Not implemented.
List<Token>	scan()	Not implemented.
List<Token>	scan(Reader stream)	Not implemented.

Methods inherited from class com.singularsys.jep.configurableparser.ConfigurableParser

addArrayAccessMatcher, addBracketMatcher, addDoubleQuoteStrings, addExponentNumbers, addFunctionMatcher, addGrammarMatcher, addHashComments, addIdentifiers, addListMatcher, addListOrBracketMatcher, addOperatorTokenMatcher, addSemiColonTerminator, addSimpleNumbers, addSingleQuoteStrings, addSlashComments, addSymbols, addTokenFilter, addTokenMatcher, addWhiteSpace, addWhiteSpaceCommentFilter, filter, getGrammarMatchers, getGrammarParserFactory, getJep, getLightWeightInstance, getOperatorTokenMatcher, getSymbolToken, getSymbolTokenMatcher, getToken, getTokenFilters, getTokenizerFactory, getTokenMatchers, init, parse, replaceGrammarMatcher, replaceTokenMatcher, setGrammarParserFactory, setImplicitMultiplicationSymbols, setTokenizerFactory

Methods inherited from class java.lang.Object

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

Constructor Details

ParallelConfigurableParser

public ParallelConfigurableParser()

Default constructor with no matchers.

ParallelConfigurableParser

public ParallelConfigurableParser(ConfigurableParser base)

Copy constructor reuses the TokenMatchers, TokenFilters, GrammarMatchers, TokenizerFactory, GrammarParserFactory, OperatorTokenMatcher and SymbolTokenMatcher from the base.

Parameters:

base - the base ConfigurableParser

Method Details

parse

public Node parse(Reader stream)
           throws ParseException

Parses the input stream. Creates a new Tokenizer, GrammarParser, and new instances of each TokenFilter, uses them to parse the input.

Specified by:

parse in interface Parser

Overrides:

parse in class ConfigurableParser

Parameters:

stream - the input stream to read from

Returns:

top node of the expression

Throws:

ParseException - if there is a syntax error in the input or an empty expression

newMultipleEquationParser

public MultipleEquationParser newMultipleEquationParser(Reader input)

Creates a new instance of the MultipleEquationParser to parse multiple expressions from the input.

Parameters:

input - Reader with the input expressions

Returns:

new instance of the MultipleEquation

restart

public void restart(Reader stream)

Not implemented.

Specified by:

restart in interface Parser

Overrides:

restart in class ConfigurableParser

Parameters:

stream - input stream

Throws:

UnsupportedOperationException - always

See Also:

• ConfigurableParser.continueParse()

continueParse

public Node continueParse()
                   throws ParseException

Not implemented.

Specified by:

continueParse in interface Parser

Overrides:

continueParse in class ConfigurableParser

Returns:

top node of the expression or null at end of file

Throws:

UnsupportedOperationException - always

ParseException - if there is a syntax error in the input

See Also:

• ConfigurableParser.restart(java.io.Reader)

scan

public List<Token> scan(Reader stream)
                 throws ParseException

Not implemented.

Overrides:

scan in class ConfigurableParser

Parameters:

stream - input

Returns:

a list of tokens, including white space and comments, null at end of input. An empty list is returned for empty equations.

Throws:

UnsupportedOperationException - always

ParseException - if there is a syntax error in the input

scan

public List<Token> scan()
                 throws ParseException

Not implemented.

Overrides:

scan in class ConfigurableParser

Returns:

List of tokens, including white space and comments, null at end of input. An empty list is returned for empty equations.

Throws:

UnsupportedOperationException - always

ParseException - if there is a syntax error in the input