import com.sun.xml.internal.bind.v2.schemagen.xmlschema.LocalAttribute; //导入依赖的package包/类
/**
 * Generate an attribute for the specified property on the specified complexType
 *
 * @param ap the attribute
 * @param attr the schema definition to which the attribute will be added
 */
private void handleAttributeProp(AttributePropertyInfo<T,C> ap, AttrDecls attr) {
    // attr is either a top-level ComplexType or a ComplexExtension
    //
    // [RESULT]
    //
    // <complexType ...>
    //   <...>...</>
    //   <attribute name="foo" type="xs:int"/>
    // </>
    //
    // or
    //
    // <complexType ...>
    //   <complexContent>
    //     <extension ...>
    //       <...>...</>
    //     </>
    //   </>
    //   <attribute name="foo" type="xs:int"/>
    // </>
    //
    // or it could also be an in-lined type (attr ref)
    //
    LocalAttribute localAttribute = attr.attribute();

    final String attrURI = ap.getXmlName().getNamespaceURI();
    if (attrURI.equals("") /*|| attrURI.equals(uri) --- those are generated as global attributes anyway, so use them.*/) {
        localAttribute.name(ap.getXmlName().getLocalPart());

        writeAttributeTypeRef(ap, localAttribute);

        attributeFormDefault.writeForm(localAttribute,ap.getXmlName());
    } else { // generate an attr ref
        localAttribute.ref(ap.getXmlName());
    }

    if(ap.isRequired()) {
        // TODO: not type safe
        localAttribute.use("required");
    }
}