com.singularsys.jep.parser

Class StandardParser

java.lang.Object

com.singularsys.jep.parser.StandardParser

All Implemented Interfaces:

JepComponent, Parser, java.io.Serializable

public class StandardParser
extends java.lang.Object
implements Parser

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
StandardParser()

Method Summary

Modifier and Type	Method and Description
Node	continueParse() Parse the next expressions from existing stream.
JepComponent	getLightWeightInstance() Gets a light-weight instance suitable for using in multiple threads.
void	init(Jep jep1) Initialize the component.
Node	parse(java.io.Reader stream) Parses the input from the reader stream.
void	restart(java.io.Reader stream) Restart the parser for reentrant parsing of multiple equations.

Methods inherited from class java.lang.Object

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

Constructor Detail

StandardParser

public StandardParser()

Method Detail

init

public void init(Jep jep1)

Description copied from interface: JepComponent

Initialize the component. This methods is called whenever a component is added to Jep. Hence it allows components to keep track of the other components they may rely on.

Specified by:

init in interface JepComponent

Parameters:

jep1 - the current Jep instance

parse

public Node parse(java.io.Reader stream)
           throws ParseException

Parses the input from the reader stream. The JavaCC parser is employed to complete this task. Errors are listed in errorList or trapped by catching ParseExceptions.

Specified by:

parse in interface Parser

Parameters:

stream - input reader

Returns:

the top node of the parse tree.

Throws:

ParseException - on syntax/gramatical error in input

restart

public void restart(java.io.Reader stream)

Description copied from interface: Parser

Restart the parser for reentrant parsing of multiple equations.

Specified by:

restart in interface Parser

Parameters:

stream - input stream

continueParse

public Node continueParse()
                   throws ParseException

Parse the next expressions from existing stream. Empty expressions such as ;; are silently ignored.

Specified by:

continueParse in interface Parser

Returns:

top node of the expression or null at end of file

Throws:

ParseException - on syntax/gramatical error in input

See Also:

restart(java.io.Reader)

getLightWeightInstance

public JepComponent getLightWeightInstance()

Description copied from interface: JepComponent

Gets a light-weight instance suitable for using in multiple threads.

Specified by:

getLightWeightInstance in interface JepComponent

Returns:

null