如何在eclipse中创建自定义向导，该向导从EMF ecore模型读取类数据，创建其对象（通过向导）并在导航器中显示它？

Question

I am learning eclipse plugin development using EMF model and want to create a wizard in eclipse (like the one to create a class), which reads an EMF ecore model and gives functionality to create objects of classes in ecore model via the Wizard.

This object should then appear in the navigator view (say package explorer), under appropriate groups. (grouped by class and its references)

I have the following ecore model. Here I have two classes Course and Student . Each course can have many students. Both classes have two attributes Id and Name . Course has another attribute, a list of students taking that course ( Students ).

I have another plugin project, in which I want to use the meta data from above ecore model and create a Wizard to create objects for these classes. See the example Wizard for Student class below.

After clicking Finish, this object should appear in the navigator as shown below. Clicking on this object will open and editor to edit it. Note that the folders Course1 and Course2 are not actually folders, but objects of class Course. Thus the grouping of nodes under Courses and Students is also required.

What I have done so far.

• Created the ecore model and generated code.
• Created a Wizard in another plugin which looks like the second image.
• Following is the code for Student Wizard's First Page.

public class StudentPageOne extends WizardPage {

private Text texts[]; //texts for Id and Name
private Composite container;

public StudentPageOne() {

}

@Override
public void createControl(Composite parent) {
    container = new Composite(parent, SWT.NONE);
    GridLayout layout = new GridLayout();
    container.setLayout(layout);
    layout.numColumns = 2;

    SimpleExamplePackage eINSTANCE = SimpleExample.impl.SimpleExamplePackageImpl.init();
    int student_features = SimpleExamplePackage.STUDENT_FEATURE_COUNT;

    texts = new Text[student_features];
    for(int i =0;i<student_features;i++) {

        System.out.println(eINSTANCE.getStudent().getEStructuralFeature(i).getName());
        Label label = new Label(container, SWT.NONE);
        label.setText(eINSTANCE.getStudent().getEStructuralFeature(i).getName());

        texts[i] = new Text(container, SWT.BORDER | SWT.SINGLE);
        texts[i].setText("");
        texts[i].addKeyListener(new KeyListener() {

            @Override
            public void keyPressed(KeyEvent e) {
            }

            @Override
            public void keyReleased(KeyEvent e) {

            }

        });
        texts[i].setLayoutData(gd);

    }

    // required to avoid an error in the system
    setControl(container);
    setPageComplete(false);

}

public Text[] getTexts() {
    return texts;
}

}

• I get the Id and Name from the first page (via getTexts method) and create an object student , shown in the following code.

   public boolean performFinish() { Text[] texts = one.getTexts(); SimpleExamplePackage.eINSTANCE.eClass(); SimpleExampleFactory factory = SimpleExampleFactory.eINSTANCE; SimpleExample.Student student = factory.createStudent(); student.setId(Integer.parseInt(texts[0].getText())); student.setName(texts[1].getText()); return true; } 

What I want to do next

I now want to show the student object from above code in the navigator (3rd Image) and create an editor to edit its attributes.

Further I would want to store the whole project as an xml.

Please let me know if there's a better way to do what I have done till now and if there is some reference or tutorial available online to achieve it.

Answer 1

You might want to take a look at EMF Parsley

With Parsley, you can create custom editors and views based on EMF models with relative easy. Or may use its components in wizard pages.