java - 如何不将 DocumentRoot 写入 XML

Question

我正在使用 EMF，并从 XSD 创建了我的 ecore。

我注意到编辑器保存的 XML 具有元素 DocumentRoot，它不是我原始 XSD 的一部分。我可以以某种方式不生成它，这样它就不会出现在编辑器的 XML 文件中吗？

伊多

Answer 1

If you have no global elements or attributes in your schema, then you won't get a document root. But of course your schema has not specified a single way to write a document in this case, it's only defined types and stuff that can be used in another schema. Some schema will need to declare a global element in order to specify the root of a document.

来源:dev.eclipse.org

A document root is created if your model has one and you are using the extended meta data option during loading. The document root has features that correspond to each of your global elements, and the particular feature of the document root that's actually set when deserializing will correspond exactly to the root element that appears in the serialization. Using EObject.eContents().get(0) on the document root instance will return the child EObject of the document root, and that child's eContainmentFeature() will correspond to your global element.

It's good to keep in mind that elements correspond to features that that types correspond to classifiers. Since an EClass corresponds to a complex type, having an instance of an EClass (complex type) is not sufficient information to say what element that should be serialized as; that's determined by eContainmentFeature(), so that's why a document root is needed to specify the root element, because without an eContainer there cannot be a meaningful eContainmentFeature().

来源:dev.eclipse.org

尝试mailing list .