com.googlecode.erca.framework.io.in.CtxContextParser.java Source code

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Here is the source code for com.googlecode.erca.framework.io.in.CtxContextParser.java

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/*********************************************************************************
 * Copyright (c) 2007, 2008 Jean-Rmy Falleri <jr.falleri@laposte.net>
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:
 *    Jean-Rmy Falleri <jr.falleri@laposte.net> - initial API and implementation
 *********************************************************************************/

package com.googlecode.erca.framework.io.in;

import java.io.BufferedReader;
import java.io.FileReader;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.impl.SimpleLog;

import com.googlecode.erca.Attribute;
import com.googlecode.erca.Entity;
import com.googlecode.erca.ErcaFactory;
import com.googlecode.erca.rcf.Pair;
import com.googlecode.erca.rcf.RcfFactory;

public class CtxContextParser extends FormalContextParser {

    private final static Log logger = new SimpleLog("com.googlecode.erca.framework.io.in.CtxContextParser");

    public static void main(String[] args) {
        try {
            CtxContextParser parser = new CtxContextParser("doc/samples/ctx/simpletest.ctx");
            parser.parse();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    public CtxContextParser(String path) {
        super(path);
    }

    public void parse() throws IOException {
        BufferedReader input = new BufferedReader(new FileReader(path));
        formalContext = RcfFactory.eINSTANCE.createFormalContext();
        int currentRow = 0;
        List<Attribute> attrs = new ArrayList<Attribute>();
        String line;
        while ((line = input.readLine()) != null) {

            line = line.trim();

            if (!"".equals(line) && (!line.startsWith("|") || !line.endsWith("|"))) {
                logger.warn("Error reading line " + currentRow);
                return;
            }

            String[] tokens = line.split("\\|");
            int len = tokens.length;
            if (currentRow == 0) {
                for (int i = 2; i < len; i++) {
                    String attrDesc = tokens[i].trim();
                    Attribute attr = RcaParsingUtils.attributeFromText(attrDesc);
                    attrs.add(i - 2, attr);
                    formalContext.getAttributes().add(attr);
                    logger.debug("Attribute " + attr.getDescription() + " created. Index: " + (i - 2));
                }
            } else {

                if (!"".equals(line)) {

                    String name = tokens[1].trim();
                    Entity ent = ErcaFactory.eINSTANCE.createEntity();
                    logger.debug("Entity " + name + " created. Line: " + currentRow);
                    ent.setName(name);
                    formalContext.getEntities().add(ent);
                    for (int i = 2; i < len; i++) {
                        String cell = tokens[i].trim().toLowerCase();
                        if ("x".equals(cell)) {
                            Attribute attr = attrs.get(i - 2);
                            Pair pair = RcfFactory.eINSTANCE.createPair();
                            pair.setSource(ent);
                            pair.setTarget(attr);
                            formalContext.getRelation().add(pair);
                            logger.debug("Pair between " + ent.getName() + " and " + attr.getDescription()
                                    + " created. Line: " + currentRow);
                        }
                    }
                }
            }

            currentRow++;

        }

    }

}