Java Code Examples for org.eclipse.emf.common.util.URI#segmentCount()

/**
 * Convert the given n4scheme-URI to a classpath-URI.
 */
private URI toClasspathURI(URI uriWithN4Scheme) {
	String[] allSegments = new String[uriWithN4Scheme.segmentCount() + 1];
	allSegments[0] = "env";
	for (int i = 0; i < uriWithN4Scheme.segmentCount(); i++) {
		allSegments[i + 1] = uriWithN4Scheme.segment(i);
	}
	URI classpathURI = URI.createHierarchicalURI(
			ClasspathUriUtil.CLASSPATH_SCHEME,
			uriWithN4Scheme.authority(),
			uriWithN4Scheme.device(),
			allSegments,
			uriWithN4Scheme.query(),
			uriWithN4Scheme.fragment());
	return classpathURI;
}
 

/**
 * Given a URI as used internally to identify N4JS projects, this method returns the corresponding N4JS project name
 * which may or may not {@link #isProjectNameWithScope(String) include an npm scope}. The given URI may be a
 * {@link URI#isFile() file URI} (headless case) or a {@link URI#isPlatform() platform URI} (UI case).
 * <p>
 * For details on N4JS project name handling, see {@link #isProjectNameWithScope(String)}.
 */
public static String deriveN4JSProjectNameFromURI(URI uri) {
	if (uri == null) {
		return null;
	}
	int segCount = uri.segmentCount();
	String last = segCount > 0 ? uri.segment(segCount - 1) : null;
	if (uri.isPlatform()) {
		// due to Eclipse conventions we cannot influence, the scope name and plain project name are represented
		// within a single segment in platform URIs:
		if (last != null && last.startsWith(NPM_SCOPE_PREFIX)) {
			last = replaceFirst(last, NPM_SCOPE_SEPARATOR_ECLIPSE, NPM_SCOPE_SEPARATOR);
		}
		return last;
	} else if (uri.isFile()) {
		// due to conventions we cannot influence, the scope name and plain project name are represented as two
		// separate segments in file URIs:
		String secondToLast = segCount > 1 ? uri.segment(segCount - 2) : null;
		if (secondToLast != null && secondToLast.startsWith(NPM_SCOPE_PREFIX)) {
			return secondToLast + NPM_SCOPE_SEPARATOR + last;
		}
		return last;
	}
	throw new IllegalArgumentException("neither a file nor a platform URI: " + uri);
}
 

private boolean isLocationInNestedInContainer(URI nestedLocation, IN4JSSourceContainer container) {
	URI containerLocation = container.getLocation().toURI();
	if (containerLocation == null || nestedLocation == null)
		return false;

	int maxSegments = containerLocation.segmentCount(); // directories have no empty last segment?
	if (nestedLocation.segmentCount() >= maxSegments) {
		for (int i = 0; i < maxSegments; i++) {
			if (!nestedLocation.segment(i).equals(containerLocation.segment(i))) {
				return false;
			}
		}
		return true;
	}
	return false;
}
 

protected String getFromProperties(URI uri) throws IOException {
	if (!uri.isHierarchical())
		return null;
	
	URI projectURI = uri;
	boolean projectFound = false;
	do {
		projectURI = projectURI.trimSegments(1);
		if (new File(projectURI.path(), ".project").exists()) {
			projectFound = true;
		}
		if (!projectFound && projectURI.segmentCount() == 0)
			// The resource is not contained in a project
			return null;
	} while (!projectFound);
	
	Properties properties = loadProperties(projectURI);
	URI resourceUri = URI.createHierarchicalURI(Arrays.copyOfRange(uri.segments(),
			projectURI.segmentCount(), uri.segmentCount()), null, null);
	return getValue(properties, resourceUri, ENCODING_PREFIX);
}
 

/**
 * Gets a file for a EMF resource.
 * 
 * @param A EMF resource
 * @return A file or null
 */
private IFile getFileFromResource(Resource resource)
{
	if (resource != null)
	{
		URI uri = resource.getResourceSet().getURIConverter().normalize(resource.getURI());
		if ("platform".equals(uri.scheme()) && uri.segmentCount() > 1 && "resource".equals(uri.segment(0)))
		{
			StringBuffer platformResourcePath = new StringBuffer();
			for (int i = 1, size = uri.segmentCount(); i < size; ++i)
			{
				platformResourcePath.append('/');
				platformResourcePath.append(uri.segment(i));
			}
			return ResourcesPlugin.getWorkspace().getRoot().getFile(new Path(platformResourcePath.toString()));
		}
	}
	return null;
}
 

void onDescriptionLoaded(URI location) {
	if (location.isPlatformResource() && location.segmentCount() == 2) {
		IN4JSEclipseProject n4project = eclipseCore.create(location);
		IProject eclipseProject = n4project.getProject();
		updateProjectReferencesIfNecessary(eclipseProject);
	}
}
 

@Override
public PlatformResourceURI getParent() {
	URI uri = toURI();
	if (uri.segmentCount() > 2) {
		return new PlatformResourceURI(uri.trimSegments(1));
	}
	return null;
}
 

/**
 * Return the parent of this location. If this URI has a trailing path separator, the result will simply be a URI
 * stripped by this trailing separator.
 */
public U getParent() {
	URI uri = toURI();
	if (uri.segmentCount() <= 0) {
		return null;
	}
	return createFrom(uri.trimSegments(1));
}
 

/**
 * @since 2.9
 */
protected boolean isProjectLocal(URI uri, final String encodedProjectName) {
	if (uri == null || uri.segmentCount() < 2 || !uri.isPlatformResource())
		return false;
	else 
		return !uri.segment(1).equals(encodedProjectName);
}
 

protected String getProjectName(EObject contextElement) {
	URI uri = EcoreUtil.getURI(contextElement);
	if (uri.isPlatformResource() && uri.segmentCount() > 1) {
		return URI.decode(uri.segment(1)); // 0 is resource
	}
	return "ProjectName";
}
 

/**
 * Returns the resource file which contains the given bibtex document. Bases
 * on {@link http://www.eclipse.org/forums/index.php?t=msg&th=128695/}
 * 
 * @param doc
 *            {@link Document} whom's resource is wanted
 * @return {@link IFile} which contains doc. <code>null</code> if nothing
 *         was found.
 */
public static IFile getIFilefromEMFResource(Resource resource) {
	if (resource == null) {
		return null;
	}
	// TODO: remove logbuffer
	logBuffer = new StringBuffer();

	URI uri = resource.getURI();
	if(resource.getResourceSet() == null){
		return null;
	}
	uri = resource.getResourceSet().getURIConverter().normalize(uri);
	String scheme = uri.scheme();
	logBuffer.append("URI Scheme: " + scheme + "\n");

	if ("platform".equals(scheme) && uri.segmentCount() > 1
			&& "resource".equals(uri.segment(0))) {
		StringBuffer platformResourcePath = new StringBuffer();
		for (int j = 1, size = uri.segmentCount(); j < size; ++j) {
			platformResourcePath.append('/');
			platformResourcePath.append(uri.segment(j));
		}
		logBuffer.append("Platform path " + platformResourcePath.toString()
				+ "\n");

		IResource parent = ResourcesPlugin.getWorkspace().getRoot()
				.getFile(new Path(platformResourcePath.toString()));
		// TODO: remove syso
		logBuffer.append("IResource " + parent);

		if (parent instanceof IFile) {
			return (IFile) parent;
		}
	}
	// System.out.println(logBuffer.toString());
	return null;

}
 

/**
 * Returns the resource file which contains the given bibtex document. Bases
 * on {@link http://www.eclipse.org/forums/index.php?t=msg&th=128695/}
 * 
 * @param doc
 *            {@link Document} whom's resource is wanted
 * @return {@link IFile} which contains doc. <code>null</code> if nothing
 *         was found.
 */
public static IFile getIFilefromEMFResource(Resource resource) {
	if (resource == null) {
		return null;
	}
	// TODO: remove logbuffer
	logBuffer = new StringBuffer();

	URI uri = resource.getURI();
	if(resource.getResourceSet() == null){
		return null;
	}
	uri = resource.getResourceSet().getURIConverter().normalize(uri);
	String scheme = uri.scheme();
	logBuffer.append("URI Scheme: " + scheme + "\n");

	if ("platform".equals(scheme) && uri.segmentCount() > 1
			&& "resource".equals(uri.segment(0))) {
		StringBuffer platformResourcePath = new StringBuffer();
		for (int j = 1, size = uri.segmentCount(); j < size; ++j) {
			platformResourcePath.append('/');
			platformResourcePath.append(uri.segment(j));
		}
		logBuffer.append("Platform path " + platformResourcePath.toString()
				+ "\n");

		IResource parent = ResourcesPlugin.getWorkspace().getRoot()
				.getFile(new Path(platformResourcePath.toString()));
		// TODO: remove syso
		logBuffer.append("IResource " + parent);

		if (parent instanceof IFile) {
			return (IFile) parent;
		}
	}
	// System.out.println(logBuffer.toString());
	return null;

}
 

private String getTargetDescription(XtextResource resource, IHyperlink hyperlink) {
	final StringBuffer sb = new StringBuffer();
	// append hyperlink text. Only consider the element name and ignore the qualified part.
	String hyperlinkText = hyperlink.getHyperlinkText();
	hyperlinkText = hyperlinkText.substring(
			hyperlinkText.lastIndexOf(N4JSHierarchicalNameComputerHelper.DELIMITER) + 1);
	final EObject target = getTarget(resource, hyperlink);

	if (target != null) {
		if (hyperlinkText != null)
			sb.append(hyperlinkText);
		else
			sb.append("<no hyperlink text>");
		// append description of target element (path from the element to the root of the AST)
		// build chain of ancestor AST elements
		sb.append(": ");
		final int startLen = sb.length();
		EObject currTarget = target;
		while (currTarget != null) {
			if (currTarget instanceof NamedElement || currTarget instanceof IdentifiableElement) {
				if (sb.length() > startLen)
					sb.append(" in ");
				String name = currTarget instanceof NamedElement ? ((NamedElement) currTarget).getName()
						: ((IdentifiableElement) currTarget).getName();
				if (name == null || name.trim().length() == 0)
					name = "<unnamed>";
				else
					name = "\"" + name + "\"";
				sb.append(name + "(" + currTarget.eClass().getName() + ")");
			}
			currTarget = currTarget.eContainer();
		}
		// add URI of resource
		final URI targetResURI = target.eResource() != null ? target.eResource().getURI() : null;
		final String fname = targetResURI != null ? targetResURI.lastSegment() : null;
		if (fname != null && fname.trim().length() > 0) {
			sb.append(" in file ");
			sb.append(fname);
		}

	} else {
		URI uri = getURI(hyperlink);
		if (uri != null) {
			if (uri.isFile()) {
				sb.append("file:/...");
				for (int i = Math.max(0, uri.segmentCount() - 2); i < uri.segmentCount(); i++) {
					sb.append("/");
					sb.append(uri.segment(i));
				}
			} else {
				sb.append(uri);
			}
		}
	}
	return sb.toString();
}