org.projog.core.parser

Class SentenceParser

java.lang.Object

org.projog.core.parser.SentenceParser

public class SentenceParser
extends Object

Parses Prolog syntax representing rules including operators.

Note: not thread safe.

See Also:

Operands

Method Summary

Modifier and Type	Method and Description
static SentenceParser	getInstance(Reader reader, Operands operands) Returns a new SentenceParser that will parse Prolog syntax read from the specified Reader using the specified Operands.
static SentenceParser	getInstance(String prologSyntax, Operands operands) Returns a new SentenceParser will parse the specified String using the specified Operands.
Map<String,Variable>	getParsedTermVariables() Returns collection of Variable instances created by this SentenceParser.
Term	parseSentence() Creates a Term from Prolog syntax, terminated by a ., read from this object's CharacterParser.

Methods inherited from class java.lang.Object

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

Method Detail

getInstance

public static SentenceParser getInstance(String prologSyntax,
                                         Operands operands)

Returns a new SentenceParser will parse the specified String using the specified Operands.

Parameters:

prologSyntax - the prolog syntax to be parsed

operands - details of the operands to use during parsing

Returns:

a new SentenceParser

getInstance

public static SentenceParser getInstance(Reader reader,
                                         Operands operands)

Returns a new SentenceParser that will parse Prolog syntax read from the specified Reader using the specified Operands.

Parameters:

reader - the source of the prolog syntax to be parsed

operands - details of the operands to use during parsing

Returns:

a new SentenceParser

getParsedTermVariables

public Map<String,Variable> getParsedTermVariables()

Returns collection of Variable instances created by this SentenceParser.

Returns all Variables created by this SentenceParser either since it was created or since the last execution of parseSentence().

Returns:

collection of Variable instances created by this SentenceParser

parseSentence

public Term parseSentence()

Creates a Term from Prolog syntax, terminated by a ., read from this object's CharacterParser.

Returns:

a Term created from Prolog syntax read from this object's CharacterParser or null if the end of the underlying stream being parsed has been reached

Throws:

ParserException - if an error parsing the Prolog syntax occurs