SDO之创建DataObject

SDO之创建DataObject

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();
    }

}