bundles/runtime/org.eclipse.fx.core/src/org/eclipse/fx/core/modulesystem/OSGiModule.java

package org.eclipse.fx.core.modulesystem;

import java.net.URI;
import java.net.URISyntaxException;
import java.net.URL;
import java.nio.file.Path;
import java.nio.file.Paths;
import java.util.Optional;

import org.eclipse.fx.core.IOUtils;
import org.eclipse.fx.core.Version;
import org.osgi.framework.Bundle;

public class OSGiModule implements Module {
	private Bundle bundle;

	public OSGiModule(Bundle bundle) {
		this.bundle = bundle;
	}

	@Override
	public String getId() {
		return this.bundle.getSymbolicName();
	}

	@Override
	public Optional<Version> getVersion() {
		return Optional.of(new BundleVersion(this.bundle.getVersion()));
	}

	@Override
	public Optional<Path> getLocation() {
		Optional<URL> optUrl = IOUtils.getLocalURL(this.bundle.getResource("META-INF/MANIFEST.MF")); //$NON-NLS-1$
		if( optUrl.isPresent() ) {
			URL url = optUrl.get();
			if( url.getProtocol().equals("file") ) { //$NON-NLS-1$
				try {
					Path path = Paths.get(url.toURI());
					return Optional.of(path.getParent().getParent());
				} catch (URISyntaxException e) {
					// TODO Auto-generated catch block
					e.printStackTrace();
				}
			} else if( url.getProtocol().equals("jar") ) {
				String path = url.getPath();
				if( path.startsWith("file:") ) {
					return Optional.of(Paths.get(URI.create(path.substring(0,path.indexOf('!')))));
				}
			}
		}
		return null;
	}

	static class BundleVersion extends Version {
		private final org.osgi.framework.Version version;

		public BundleVersion(org.osgi.framework.Version version) {
			this.version = version;
		}

		@Override
		public int compareTo(Version o) {
			int rv = Integer.compare(getMajor(), o.getMajor());
			if (rv != 0) {
				return rv;
			}

			rv = Integer.compare(getMinor(), o.getMinor());
			if (rv != 0) {
				return rv;
			}

			rv = Integer.compare(getMicro(), o.getMicro());
			if (rv != 0) {
				return rv;
			}

			return getQualifier().orElse("").compareTo(o.getQualifier().orElse("")); //$NON-NLS-1$//$NON-NLS-2$
		}

		@Override
		public int getMajor() {
			return this.version.getMajor();
		}

		@Override
		public int getMinor() {
			return this.version.getMinor();
		}

		@Override
		public int getMicro() {
			return this.version.getMicro();
		}

		@Override
		public Optional<String> getQualifier() {
			return Optional.ofNullable(this.version.getQualifier());
		}

	}
}