de.monticore.io.paths.ModelCoordinateImpl.java Source code

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Here is the source code for de.monticore.io.paths.ModelCoordinateImpl.java

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/*
 * ******************************************************************************
 * MontiCore Language Workbench
 * Copyright (c) 2015, MontiCore, All rights reserved.
 *
 * This project is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 3.0 of the License, or (at your option) any later version.
 * This library 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
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this project. If not, see <http://www.gnu.org/licenses/>.
 * ******************************************************************************
 */

package de.monticore.io.paths;

import static com.google.common.base.Preconditions.checkState;

import java.io.File;
import java.io.IOException;
import java.net.JarURLConnection;
import java.net.URI;
import java.net.URL;
import java.nio.file.Path;
import java.nio.file.Paths;
import java.util.Objects;

import org.apache.commons.io.FilenameUtils;

import de.se_rwth.commons.logging.Log;

final class ModelCoordinateImpl implements ModelCoordinate {

    /**
     * The relative location of the model.<br>
     * Example: {@code src/main/grammars/de/mc/statechart.mc}
     */
    private URL location;

    /**
     * The qualified path of the model. It is implied that any directories
     * preceding the file name are part of the model package.<br>
     * Example: {@code de/mc/statechart.mc}
     */
    private Path qualifiedPath;

    @Override
    public boolean hasLocation() {
        return this.location != null;
    }

    @Override
    public boolean isQualified() {
        return this.qualifiedPath != null;
    }

    @Override
    public void setLocation(URL location) {
        checkState(this.location == null, "The location of the ModelCoordinate was already set.");
        this.location = location;
    }

    @Override
    public void setQualifiedPath(Path qualifiedPath) {
        checkState(this.qualifiedPath == null, "The qualified path of the ModelCoordinate was already set.");
        this.qualifiedPath = qualifiedPath;
    }

    @Override
    public boolean exists() {
        checkState(location != null, "The location of the ModelCoordinate wasn't set.");
        return location != null;
    }

    @Override
    public String getBaseName() {
        if (hasLocation()) {
            return FilenameUtils.getBaseName(location.toString());
        } else {
            return FilenameUtils.getBaseName(qualifiedPath.toString());
        }
    }

    @Override
    public String getExtension() {
        if (hasLocation()) {
            return FilenameUtils.getExtension(location.toString());
        } else {
            return FilenameUtils.getExtension(qualifiedPath.toString());
        }
    }

    @Override
    public URL getLocation() {
        checkState(location != null, "The location of the ModelCoordinate wasn't set.");
        return this.location;
    }

    @Override
    public String getName() {
        if (hasLocation()) {
            return FilenameUtils.getName(location.toString());
        } else {
            return FilenameUtils.getName(qualifiedPath.toString());
        }
    }

    @Override
    public Path getPackagePath() {
        checkState(qualifiedPath != null, "The qualified path of the ModelCoordinate wasn't set.");
        return Paths.get(FilenameUtils.getPathNoEndSeparator(qualifiedPath.toString()));
    }

    @Override
    public Path getParentDirectoryPath() {
        checkState(qualifiedPath != null, "The qualified path of the ModelCoordinate wasn't set.");

        if (location.getProtocol().equals("jar")) {
            try {
                JarURLConnection connection = (JarURLConnection) location.openConnection();
                File result = new File(connection.getJarFileURL().getFile());
                return Paths.get(result.getAbsolutePath());
            } catch (IOException e) {
                Log.debug("Error reading jar file URL", e, ModelCoordinateImpl.class.getName());
            }
        }

        String locationString = location.toString();
        String protocol = location.getProtocol();
        int protocolLength = 0;
        if (locationString.startsWith(protocol)) {
            protocolLength = protocol.length() + 1;
        }

        int qualifiedPathLength = qualifiedPath.toString().length();
        String parentDirectoryString = locationString.substring(protocolLength,
                locationString.length() - qualifiedPathLength);

        String uri = protocol + ":" + parentDirectoryString;
        URI temp = URI.create(uri);
        Path p = Paths.get(temp);
        return p;
    }

    @Override
    public String getQualifiedBaseName() {
        checkState(qualifiedPath != null, "The qualified path of the ModelCoordinate wasn't set.");
        // regex for replacing all file separators with dots
        return getQualifiedBasePath().toString().replaceAll("\\\\|/", ".");
    }

    @Override
    public Path getQualifiedBasePath() {
        checkState(qualifiedPath != null, "The qualified path of the ModelCoordinate wasn't set.");
        return getPackagePath().resolve(getBaseName());
    }

    @Override
    public Path getQualifiedPath() {
        checkState(qualifiedPath != null, "The qualified path of the ModelCoordinate wasn't set.");
        return this.qualifiedPath;
    }

    @Override
    public boolean equals(Object obj) {
        if (!(obj instanceof ModelCoordinate)) {
            return false;
        }
        ModelCoordinate coordinate = (ModelCoordinate) obj;
        return Objects.equals(location, coordinate.getLocation())
                && Objects.equals(qualifiedPath, coordinate.getQualifiedPath());
    }

    @Override
    public int hashCode() {
        int hashCode = 0;
        hashCode += location != null ? location.hashCode() : 0;
        hashCode += qualifiedPath != null ? qualifiedPath.hashCode() : 0;
        return hashCode;
    }

    @Override
    public String toString() {
        return "Location: " + Objects.toString(location) + " Package: " + Objects.toString(qualifiedPath);
    }

}