添加监听到EMF对象、加密保存

一、可以注册监听来获取EMF模型改变事件，例如：

 

public class ElementObserver {
	private IPersonList persons;

	public ElementObserver() {
		ModelFactory factory = ModelFactory.eINSTANCE;
		persons = factory.createIPersonList();

		Adapter adapter = new AdapterImpl() {
			public void notifyChanged(Notification notification) {
				System.out
						.println("Notfication received from the data model. Data model has changed!!!");
			}
		};
		persons.eAdapters().add(adapter);
	}

	public void doStuff() {
		ModelFactory factory = ModelFactory.eINSTANCE;
		IPerson person = factory.createIPerson();
		person.setFirstName("Lars");
		System.out.println("I'm adding a person.");
		persons.getPersons().add(person);
		System.out.println("I'm changing a entry");
		persons.getPersons().get(0).setFirstName("Lars2");
	}
}

 

通过注册Adapter对象persons里，我们可以收到消息如果这个list有增删。

 

public class TotalObserver {
	private IPersonList persons;

	public TotalObserver() {
		ModelFactory factory = ModelFactory.eINSTANCE;
		persons = factory.createIPersonList();

		EContentAdapter adapter = new EContentAdapter() {
			public void notifyChanged(Notification notification) {
				super.notifyChanged(notification);
				System.out
						.println("Notfication received from the data model. Data model has changed!!!");
			}
		};
		persons.eAdapters().add(adapter);
	}

	public void doStuff() {
		ModelFactory factory = ModelFactory.eINSTANCE;
		IPerson person = factory.createIPerson();
		person.setFirstName("Lars");
		System.out.println("I'm adding a person.");
		persons.getPersons().add(person);
		System.out.println("I'm changing a entry");
		IPerson person2 = persons.getPersons().get(0);
		person2.setFirstName("Lars2");

	}
}

 

通过增加EContentAdapter，我们可以监听到list的增删和其中某个元素有变化。

 

二、EMF模型保存时加密

 

可以通过设置Save Option和Load Option来实现模型保存时加密、加载时解密的过程。例如：

public class MyXMIFactoryImpl extends XMIResourceFactoryImpl {

	@Override
	public Resource createResource(URI uri) {
		XMIResourceFactoryImpl resFactory = new XMIResourceFactoryImpl();
		XMIResource resource = (XMIResource) resFactory.createResource(uri);
		try {
			resource.getDefaultLoadOptions().put(Resource.OPTION_CIPHER,
					new AESCipherImpl("12345"));
			resource.getDefaultSaveOptions().put(Resource.OPTION_CIPHER,
					new AESCipherImpl("12345"));
		} catch (Exception e) {
			e.printStackTrace();
		}
		return resource;
	}
}