Java IEObjectDescription.getUserData方法代码示例

import org.eclipse.xtext.resource.IEObjectDescription; //导入方法依赖的package包/类
private boolean equalDescriptions(IEObjectDescription newDescription,
		IEObjectDescription oldDescription, URI uri) {
	if (!newDescription.getQualifiedName().equals(oldDescription.getQualifiedName())) {
		return false;
	}
	if (!newDescription.getEClass().equals(oldDescription.getEClass())) {
		return false;
	}
	if (!newDescription.getEObjectURI().equals(oldDescription.getEObjectURI())) {
		return false;
	}
	if (TypesPackage.Literals.TMODULE == newDescription.getEClass()) {
		String newModule = newDescription.getUserData(UserdataMapper.USERDATA_KEY_SERIALIZED_SCRIPT);
		String oldModule = oldDescription.getUserData(UserdataMapper.USERDATA_KEY_SERIALIZED_SCRIPT);
		if (newModule == null || oldModule == null) {
			return true;
		}
		if (!newModule.equals(oldModule)) {
			TModule newModuleObj = UserdataMapper.getDeserializedModuleFromDescription(newDescription, uri);
			TModule oldModuleObj = UserdataMapper.getDeserializedModuleFromDescription(oldDescription, uri);
			// we deserialize the TModules and ignore the MD5 Hash
			newModuleObj.setAstMD5("");
			oldModuleObj.setAstMD5("");
			if (!EcoreUtilN4.equalsNonResolving(newModuleObj, oldModuleObj)) {
				return false;
			}
		}
	}
	// todo compare user data if module
	return true;
}
 

import org.eclipse.xtext.resource.IEObjectDescription; //导入方法依赖的package包/类
/**
 * Reads the TModule stored in the given IEObjectDescription.
 */
public static TModule getDeserializedModuleFromDescription(IEObjectDescription eObjectDescription, URI uri) {
	final String serializedData = eObjectDescription.getUserData(USERDATA_KEY_SERIALIZED_SCRIPT);
	if (Strings.isNullOrEmpty(serializedData)) {
		return null;
	}
	final XMIResource xres = new XMIResourceImpl(uri);
	try {
		final boolean binary = !serializedData.startsWith("<");
		final ByteArrayInputStream bais = new ByteArrayInputStream(
				binary ? XMLTypeFactory.eINSTANCE.createBase64Binary(serializedData)
						: serializedData.getBytes(TRANSFORMATION_CHARSET_NAME));
		xres.load(bais, getOptions(uri, binary));
	} catch (Exception e) {
		LOGGER.warn("error deserializing module from IEObjectDescription: " + uri); //$NON-NLS-1$
		if (LOGGER.isTraceEnabled()) {
			LOGGER.trace("error deserializing module from IEObjectDescription=" + eObjectDescription
					+ ": " + uri, e); //$NON-NLS-1$
		}
		// fail safe, because not uncommon (serialized data might have been created with an old version of the N4JS
		// IDE, so the format could be out of date (after an update of the IDE))
		return null;
	}
	final List<EObject> contents = xres.getContents();
	if (contents.isEmpty() || !(contents.get(0) instanceof TModule)) {
		return null;
	}
	final TModule module = (TModule) contents.get(0);
	xres.getContents().clear();
	return module;
}
 

import org.eclipse.xtext.resource.IEObjectDescription; //导入方法依赖的package包/类
/**
 * Reads the list of direct dependencies of the resource R represented by the given resource description from its
 * user data. Returns a list of strings, in which each string represents the URI of a resource D that is a direct
 * dependency of R (i.e. R depends on D).
 * <p>
 * Definition: a resource R <em>directly depends on</em> a resource D, if R imports an identifiable element from D.
 * In this case, we also say D <em>is a dependency of</em> R.
 *
 * Returns none if the information is missing in the resource description.
 */
public static Optional<List<String>> readDependenciesFromDescription(IResourceDescription description) {
	final Iterable<IEObjectDescription> modules = description
			.getExportedObjectsByType(TypesPackage.Literals.TMODULE);
	for (IEObjectDescription module : modules) {
		final String dependenciesStr = module.getUserData(USERDATA_KEY_DEPENDENCIES);
		if (dependenciesStr != null) {
			return Optional.of(splitter.splitToList(dependenciesStr));
		}
	}
	return Optional.empty();
}
 

import org.eclipse.xtext.resource.IEObjectDescription; //导入方法依赖的package包/类
/**
 * {@inheritDoc} Always returns false for polyfills, otherwise super method is called.
 */
@Override
protected boolean isShadowed(IEObjectDescription fromParent) {
	if (fromParent != null) {
		String userData = fromParent.getUserData(N4JSResourceDescriptionStrategy.MAIN_MODULE_KEY);
		if (userData != null) {
			boolean describesMainModule = Boolean.parseBoolean(userData);
			if (describesMainModule) {
				return false;// main modules are never shadowed
			}
		}
	}
	return super.isShadowed(fromParent);
}
 

import org.eclipse.xtext.resource.IEObjectDescription; //导入方法依赖的package包/类
/**
 * Checks whether the given {@link IEObjectDescription} instance contains a serialized types module in its user
 * data.
 * <p>
 * Note that this method does not check whether the serialized types module is an empty string, or whether the
 * deserialized module is empty.
 * </p>
 *
 * @param eObjectDescription
 *            the object to check
 * @return <code>true</code> if the given object description contains a serialized types module and
 *         <code>false</code> otherwise
 */
public static boolean hasSerializedModule(IEObjectDescription eObjectDescription) {
	return eObjectDescription.getUserData(USERDATA_KEY_SERIALIZED_SCRIPT) != null;
}