de.uni.bremen.monty.moco.ast.AntlrAdapter.java Source code

Introduction

Here is the source code for de.uni.bremen.monty.moco.ast.AntlrAdapter.java

Source

/*
 * moco, the Monty Compiler
 * Copyright (c) 2013-2014, Monty's Coconut, All rights reserved.
 *
 * This file is part of moco, the Monty Compiler.
 *
 * moco is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public
 * License as published by the Free Software Foundation; either
 * version 3.0 of the License, or (at your option) any later version.
 *
 * moco is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * General Public License for more details.
 *
 * Linking this program and/or its accompanying libraries statically or
 * dynamically with other modules is making a combined work based on this
 * program. Thus, the terms and conditions of the GNU General Public License
 * cover the whole combination.
 *
 * As a special exception, the copyright holders of moco give
 * you permission to link this programm and/or its accompanying libraries
 * with independent modules to produce an executable, regardless of the
 * license terms of these independent modules, and to copy and distribute the
 * resulting executable under terms of your choice, provided that you also meet,
 * for each linked independent module, the terms and conditions of the
 * license of that module.
 *
 * An independent module is a module which is not
 * derived from or based on this program and/or its accompanying libraries.
 * If you modify this library, you may extend this exception to your version of
 * the program or library, but you are not obliged to do so. If you do not wish
 * to do so, delete this exception statement from your version.
 *
 * You should have received a copy of the GNU General Public
 * License along with this library.
 */

package de.uni.bremen.monty.moco.ast;

import de.uni.bremen.monty.moco.antlr.MontyLexer;
import de.uni.bremen.monty.moco.antlr.MontyParser;
import de.uni.bremen.monty.moco.ast.declaration.ModuleDeclaration;
import de.uni.bremen.monty.moco.util.TupleDeclarationFactory;
import org.antlr.v4.runtime.ANTLRInputStream;
import org.antlr.v4.runtime.CommonTokenStream;

import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.SequenceInputStream;

public class AntlrAdapter {
    private TupleDeclarationFactory tupleDeclarationFactory = new TupleDeclarationFactory();

    public MontyParser createParser(final InputStream file) throws IOException {

        InputStream in = createInputStream(file);

        // the additional line-break is needed because of our indentation rule
        // and the fact that a statement should be terminated by a line break
        ANTLRInputStream input = new ANTLRInputStream(in);
        MontyLexer lexer = new MontyLexer(input);
        CommonTokenStream tokens = new CommonTokenStream(lexer);
        return new MontyParser(tokens);
    }

    private InputStream createInputStream(InputStream file) {
        return new SequenceInputStream(file, new ByteArrayInputStream("\n".getBytes()));
    }

    public ModuleDeclaration parse(InputStream file, String fileName) throws IOException {
        MontyParser parser = createParser(file);

        ASTBuilder astBuilder = new ASTBuilder(fileName, tupleDeclarationFactory);
        ASTNode moduleNode = astBuilder.visit(parser.compilationUnit());
        return (ModuleDeclaration) moduleNode;
    }

    public TupleDeclarationFactory getTupleDeclarationFactory() {
        return tupleDeclarationFactory;
    }
}