DefaultMacNativeDiscoveryStrategy.java

/*
 * This file is part of VLCJ.
 *
 * VLCJ 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 of the License, or
 * (at your option) any later version.
 *
 * VLCJ 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.
 *
 * You should have received a copy of the GNU General Public License
 * along with VLCJ.  If not, see <http://www.gnu.org/licenses/>.
 *
 * Copyright 2009-2016 Caprica Software Limited.
 */

package uk.co.caprica.vlcj.discovery.mac;

import java.util.List;
import java.util.regex.Pattern;

import uk.co.caprica.vlcj.binding.LibC;
import uk.co.caprica.vlcj.discovery.StandardNativeDiscoveryStrategy;
import uk.co.caprica.vlcj.runtime.RuntimeUtil;
import uk.co.caprica.vlcj.version.LibVlcVersion;

/**
 * Default implementation of a native library discovery strategy that searches in
 * standard well-known directory locations on MacOS.
 */
public class DefaultMacNativeDiscoveryStrategy extends StandardNativeDiscoveryStrategy {

    /**
     * Filename patterns to search for.
     */
    private static final Pattern[] FILENAME_PATTERNS = new Pattern[] {
        Pattern.compile("libvlc\\.dylib"),
        Pattern.compile("libvlccore\\.dylib")
    };

    /**
     * Format string to prepare the plugin path environment variable value.
     */
    private static final String PLUGIN_PATH_FORMAT = "%s/../plugins";

    @Override
    protected Pattern[] getFilenamePatterns() {
        return FILENAME_PATTERNS;
    }

    @Override
    public final boolean supported() {
        return RuntimeUtil.isMac();
    }

    @Override
    protected void onGetDirectoryNames(List<String> directoryNames) {
        directoryNames.add("/Applications/VLC.app/Contents/MacOS/lib");
    }

    @Override
    public void onFound(String path) {
        if (LibVlcVersion.getVersion().atLeast(LibVlcVersion.LIBVLC_220)) {
            LibC.INSTANCE.setenv(PLUGIN_ENV_NAME, String.format(PLUGIN_PATH_FORMAT, path), 1);
        }
    }
}