初学SDO ，在网上下载SDO的Sample就调试，结果走了不少弯路，就是出现IllegalArgumentException，不知是出现
什么问题，心想我也是照着例子搞的怎么就是通不过呢？于是乎跟踪tuscany的源码，发现Type为空。为什么呢？可能是在运行这前要把你想要创建的
DataObject的命名空间与类型的名字在文件中得注册。于是又仔细跟踪看到了这么一段：
XSDHelper xsdHelper = scope.getXSDHelper();
InputStream is = null;
try {
URL url = getClass().getResource("/"+fileName);
is = url.openStream();
xsdHelper.define(is, url.toString());
} catch (Exception e) {
somethingUnexpectedHasHappened(e);
} finally {
try {
is.close();
} catch (Exception e) {
somethingUnexpectedHasHappened(e);
}
}
猛然明白了。所以把例子中的xsd文件拷到项目下。再运行通过，高兴呀，哈哈。下面我把例子贴出，可能也有网友跟我一样吧，也希望其它初学SDO的网友别走我弯路。
public class SdoDataObject {
private static final String COMPANY_GENERATED_XML = "companyGenerated.xml";
/**
* 创建类型范围的上下文
*
* @return
*/
private HelperContext createScopeForType() {
return SDOUtil.createHelperContext();
}
/**
* 从XML计划文件中加载类型。
*
* @param filename
*/
private void loadTypesFromXMLSchemaFile(HelperContext scope, String filename) {
XSDHelper xsdHelper = scope.getXSDHelper();
URL url = getClass().getResource("/" + filename);
InputStream is = null;
try {
is = url.openStream();
xsdHelper.define(is, url.toString());
is.close();
} catch (IOException e) {
e.printStackTrace();
}
}
/**
* 组装数据图
*
* @param company
*/
private void populateDataGraph(DataObject company) {
company.setString("name", "aaaa");
company.setString("employeeOfTheMonth", "D001");
DataObject depts = company.createDataObject("departments");
depts.setString("name", "Advanced Technologies");
depts.setString("location", "NY");
depts.setString("number", "123");
System.out.println("Creating an employee: John Jones");
DataObject johnJones = depts.createDataObject("employees");
johnJones.setString("name", "John Jones");
johnJones.setString("SN", "E0001");
System.out.println("Creating an employee: Jane Doe");
DataObject janeDoe = depts.createDataObject("employees");
janeDoe.setString("name", "Jane Doe");
janeDoe.setString("SN", "E0003");
System.out.println("Creating a manager: Fred Bloggs");
DataObject fVarone = depts.createDataObject("employees");
fVarone.setString("name", "Fred Bloggs");
fVarone.setString("SN", "E0004");
fVarone.setString("manager", "true");
System.out.println("DataObject creation completed");
System.out.println();
System.out.println("create DataObject susseccfully");
}
public void run() {
HelperContext scope = createScopeForType();
loadTypesFromXMLSchemaFile(scope, "company.xsd");
DataObject company = scope.getDataFactory().create("company.xsd",
"CompanyType");
populateDataGraph(company);
try {
FileOutputStream fos = new FileOutputStream(COMPANY_GENERATED_XML);
try {
scope.getXMLHelper().save(company, "company.xsd", "company",
fos);
} catch (IOException e) {
e.printStackTrace();
}
String xml = scope.getXMLHelper().save(company, "company.xsd",
"company");
System.out.println(xml);
} catch (FileNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
public static void main(String[] args) {
SdoDataObject sdoDataObject = new SdoDataObject();
sdoDataObject.run();
}
}