org.jamocha.Jamocha.java Source code

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Here is the source code for org.jamocha.Jamocha.java

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/*
 * Copyright 2002-2016 The Jamocha Team
 *
 *
 * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance
 * with the License. You may obtain a copy of the License at
 *
 * http://www.jamocha.org/
 *
 * Unless required by applicable law or agreed to in writing, software distributed under the License is distributed
 * on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for
 * the specific language governing permissions and limitations under the License.
 */
package org.jamocha;

import lombok.Getter;
import lombok.extern.log4j.Log4j2;
import org.apache.commons.lang3.tuple.Pair;
import org.jamocha.dn.Network;
import org.jamocha.languages.clips.parser.SFPToCETranslator;
import org.jamocha.languages.clips.parser.generated.ParseException;
import org.jamocha.languages.clips.parser.generated.SFPParser;
import org.jamocha.languages.clips.parser.generated.SFPStart;
import org.jamocha.languages.common.Warning;

import java.io.InputStream;
import java.util.Objects;
import java.util.Queue;

/**
 * @author Christoph Terwelp <christoph.terwelp@rwth-aachen.de>
 */
@Log4j2
public class Jamocha {

    @Getter
    private final Network network;

    SFPParser parser;
    final SFPToCETranslator visitor;

    public Jamocha() {
        this.network = new Network();
        this.visitor = new SFPToCETranslator(this.network, this.network);
    }

    public void loadParser(final InputStream inputStream) {
        this.parser = new SFPParser(inputStream);
    }

    public Pair<Queue<Warning>, String> parse() throws ParseException {
        final SFPStart n = this.parser.Start();
        if (null == n)
            return null;
        final String value = Objects.toString(n.jjtAccept(this.visitor, null));
        return Pair.of(this.visitor.getWarnings(), value);
    }

    public void shutdown() {
        this.network.shutdown();
    }

    public static void main(final String[] args) {
        final Jamocha jamocha = new Jamocha();
        jamocha.loadParser(System.in);

        while (true) {
            try {
                System.out.print("SFP> ");
                final Pair<Queue<Warning>, String> parserReturn = jamocha.parse();
                if (null == parserReturn)
                    System.exit(0);
                final String expression = parserReturn.getRight();
                if (null != expression) {
                    log.info(expression);
                }
                final Queue<Warning> warnings = parserReturn.getLeft();
                warnings.forEach(w -> log.warn("Warning: " + w.getMessage()));
            } catch (final ParseException e) {
                log.catching(e);
                return;
            } catch (final Throwable e) {
                log.catching(e);
            }
        }
    }

}