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ModelCC is a model-based parser generator (a.k.a. compiler compiler) that decouples language specification from language processing, avoiding some of the problems caused by grammar-driven parser generators. ModelCC receives a conceptual model as input, along with constraints that annotate it. It is then able to create a parser for the desired textual language and the generated parser fully automates the instantiation of the language conceptual model. ModelCC also includes a built-in reference resolution mechanism that results in abstract syntax graphs, rather than mere abstract syntax trees.
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/*
* ModelCC, distributed under ModelCC Shared Software License, www.modelcc.org
*/
package org.modelcc.parser.fence;
import java.io.Serializable;
import java.util.Map;
import org.modelcc.language.syntax.ParserMetadata;
import org.modelcc.language.syntax.SyntaxSpecification;
import org.modelcc.lexer.LexicalGraph;
/**
* Fence - SyntaxGraphParser with Lexical and Syntactic Ambiguity Support.
*
* @author Luis Quesada ([email protected])
*/
public class Fence implements Serializable {
/**
* Perform syntactical analysis on a Lexical Graph.
* @param fs the Fence specification.
* @param lg the input lexical graph.
* @return a syntax graph.
*/
public SyntaxGraph parse(ParserMetadata metadata,SyntaxSpecification fs,LexicalGraph lg)
{
return parse(metadata,fs,lg,null);
}
/**
* Perform syntactical analysis on a Lexical Graph.
* @param fs the Fence specification.
* @param lg the input lexical graph.
* @param objectMetadata the object metadata warehouse
* @return a syntax graph.
*/
public SyntaxGraph parse(ParserMetadata metadata,SyntaxSpecification fs,LexicalGraph lg,Map> objectMetadata)
{
FenceGrammarParser fgp = new FenceGrammarParser();
ParsedGraph pg = fgp.parse(fs.getGrammar(),lg);
FenceConstraintEnforcer fce = new FenceConstraintEnforcer(metadata,fs.getConstraints(),objectMetadata);
SyntaxGraph sg = fce.enforce(pg);
return sg;
}
}