-digests DIGEST ( ',' DIGEST ) *

/**
 * Check if we need to calculate any checksums.
 *
 * @param dot
 * @throws Exception
 */
private void doDigests(Jar dot) throws Exception {
	Parameters ps = OSGiHeader.parseHeader(getProperty(DIGESTS));
	if (ps.isEmpty())
		return;
	trace("digests %s", ps);
	String[] digests = ps.keySet().toArray(new String[ps.size()]);
	dot.setDigestAlgorithms(digests);
}




/**
 * Create a standalone executable. All entries on the runpath are rolled out
 * into the JAR and the runbundles are copied to a directory in the jar. The
 * launcher will see that it starts in embedded mode and will automatically
 * detect that it should load the bundles from inside. This is drive by the
 * launcher.embedded flag.
 * 
 * @throws Exception
 */

@Override
public Jar executable() throws Exception {
	
	// TODO use constants in the future
	Parameters packageHeader = OSGiHeader.parseHeader(project.getProperty("-package"));
	boolean useShas = packageHeader.containsKey("jpm");
	project.trace("Useshas %s %s", useShas, packageHeader);

	Jar jar = new Jar(project.getName());
	
	Builder b = new Builder();
	project.addClose(b);
	
	if (!project.getIncludeResource().isEmpty()) {
		b.setIncludeResource(project.getIncludeResource().toString());
		b.setProperty(Constants.RESOURCEONLY, "true");
		b.build();
		if ( b.isOk()) {
			jar.addAll(b.getJar());
		}
		project.getInfo(b);
	}
	
	List<String> runpath = getRunpath();

	Set<String> runpathShas = new LinkedHashSet<String>();
	Set<String> runbundleShas = new LinkedHashSet<String>();
	List<String> classpath = new ArrayList<String>();

	for (String path : runpath) {
		project.trace("embedding runpath %s", path);
		File file = new File(path);
		if (file.isFile()) {
			if (useShas) {
				String sha = SHA1.digest(file).asHex();
				runpathShas.add(sha + ";name=\"" + file.getName() + "\"");
			} else {
				String newPath = "jar/" + file.getName();
				jar.putResource(newPath, new FileResource(file));
				classpath.add(newPath);
			}
		}
	}

	// Copy the bundles to the JAR

	List<String> runbundles = (List<String>) getRunBundles();
	List<String> actualPaths = new ArrayList<String>();

	for (String path : runbundles) {
		project.trace("embedding run bundles %s", path);
		File file = new File(path);
		if (!file.isFile())
			project.error("Invalid entry in -runbundles %s", file);
		else {
			if (useShas) {
				String sha = SHA1.digest(file).asHex();
				runbundleShas.add(sha + ";name=\"" + file.getName() + "\"");
				actualPaths.add("${JPMREPO}/" + sha);
			} else {
				String newPath = "jar/" + file.getName();
				jar.putResource(newPath, new FileResource(file));
				actualPaths.add(newPath);
			}
		}
	}

	LauncherConstants lc = getConstants(actualPaths, true);
	lc.embedded = !useShas;
	lc.storageDir = null; // cannot use local info

	final Properties p = lc.getProperties();

	ByteArrayOutputStream bout = new ByteArrayOutputStream();
	p.store(bout, "");
	jar.putResource(LauncherConstants.DEFAULT_LAUNCHER_PROPERTIES, new EmbeddedResource(bout.toByteArray(), 0L));

	Manifest m = new Manifest();
	Attributes main = m.getMainAttributes();

	for (Entry<Object,Object> e : project.getFlattenedProperties().entrySet()) {
		String key = (String) e.getKey();
		if (key.length() > 0 && Character.isUpperCase(key.charAt(0)))
			main.putValue(key, (String) e.getValue());
	}

	Instructions instructions = new Instructions(project.getProperty(Constants.REMOVEHEADERS));
	Collection<Object> result = instructions.select(main.keySet(), false);
	main.keySet().removeAll(result);

	if (useShas) {
		project.trace("Use JPM launcher");
		m.getMainAttributes().putValue("Main-Class", JPM_LAUNCHER_FQN);
		m.getMainAttributes().putValue("JPM-Classpath", Processor.join(runpathShas));
		m.getMainAttributes().putValue("JPM-Runbundles", Processor.join(runbundleShas));
		URLResource jpmLauncher = new URLResource(this.getClass().getResource("/" + JPM_LAUNCHER));
		jar.putResource(JPM_LAUNCHER, jpmLauncher);
	} else {
		project.trace("Use Embedded launcher");
		m.getMainAttributes().putValue("Main-Class", EMBEDDED_LAUNCHER_FQN);
		m.getMainAttributes().putValue(EmbeddedLauncher.EMBEDDED_RUNPATH, Processor.join(classpath));
		URLResource embeddedLauncher = new URLResource(this.getClass().getResource("/" + EMBEDDED_LAUNCHER));
		jar.putResource(EMBEDDED_LAUNCHER, embeddedLauncher);
	}
	if ( project.getProperty(Constants.DIGESTS) != null)
		jar.setDigestAlgorithms(project.getProperty(Constants.DIGESTS).trim().split("\\s*,\\s*"));
	else
		jar.setDigestAlgorithms(new String[]{"SHA-1", "MD-5"});
	jar.setManifest(m);
	return jar;
}