我理解eclipse验证框架如何工作的方式:
例如:
public class ValidateNameTest {
public static void main(String[] args) {
ExtlibraryPackageImpl.init();
ExtlibraryFactory factory = ExtlibraryFactory.eINSTANCE;
Writer writer = factory.createWriter();
// comment next line for false result in console
writer.setName("test");
writer.setFirstName("test");
writer.setLastName("test");
boolean isNull = (writer.getName() == null) ? true : false;
System.out.println("writer name is null : " + isNull);
boolean result = validateObject(writer);
System.err.println("result = " + result);
boolean result2 = validateObject2(writer);
System.err.println("result2 = " + result2);
boolean result3 = validateObject3(writer);
System.err.println("result3 = " + result3);
boolean result4 = validateObject5(writer);
System.out.println("result4 = " + result4);
}
public static boolean validateObject(Writer writer) {
ExtlibraryValidator validator = ExtlibraryValidator.INSTANCE;
if (!validator.validateWriter_hasValidName(writer, null, null)) {
return false;
}
return true;
}
public static boolean validateObject2(EObject eObject) {
EValidator validator = EValidator.Registry.INSTANCE
.getEValidator(eObject.eClass().getEPackage());
if (validator != null) {
if (!validator.validate(eObject, null, null)) {
return false;
}
}
return true;
}
public static boolean validateObject3(EObject eObject) {
Diagnostic diagnostic = Diagnostician.INSTANCE.validate(eObject);
return diagnostic.getSeverity() == Diagnostic.OK;
}
public static boolean validateObject5(EObject eObject)
{
Diagnostic diagnostic = Diagnostician.INSTANCE.validate(eObject);
if (diagnostic.getSeverity() == Diagnostic.ERROR || diagnostic.getSeverity() == Diagnostic.WARNING)
{
System.err.println(diagnostic.getMessage());
for (Diagnostic childDiagnostic : diagnostic.getChildren())
{
switch (childDiagnostic.getSeverity())
{
case Diagnostic.ERROR:
case Diagnostic.WARNING:
System.err.println("\t" + childDiagnostic.getMessage());
}
}
return false;
}
return true;
}
}
但我想检查一个值是否对模型有效我为该属性调用了setter。这是否可以使用Eclipse EMF验证框架?有人可以举个例子吗?
答案 0 :(得分:3)
我知道一个常见的用例:模型和UI控件之间的数据绑定。
在模型和用户界面之间建立EMF数据绑定时,可以按如下方式验证用户输入。创建更新策略(建模目标)并覆盖方法 validateBeforeSet(Object)。这是一个例子:
EMFDataBindingContext ctx = new EMFDataBindingContext();
ISWTObservableValue notesObservableValue = prop.observe(swtTextViewer);
IEMFValueProperty notesValueProperty = EMFProperties.value(ModelPackage.Literals.THING__NOTES);
UpdateValueStrategy targetToModel = new UpdateValueStrategy() {
@Override
public IStatus validateBeforeSet(Object value) {
if ("".equals(value)) {
MessageDialog.openError(Display.getCurrent()
.getActiveShell(), "Error",
"You should supply a description");
return ValidationStatus
.error("You should supply a description");
}
return super.validateBeforeSet(value);
}
};
ctx.bindValue(notesObservableValue,
notesValueProperty.observe(thing), targetToModel,
new UpdateValueStrategy());