RE: NullPointException error in DAS Beta 1.0

[LiTaojian]

Hi All , 
    
    I found the root cause , because I serialized the DataObject , then
deserialized the DataObject .
The typeHelper was destroied when deserialized the DataObject .
 
What was it happended when deserialized the DataObject ?
 
How to solve this problem ?  Should I  back to the DAS M2 ?
 
 
Leo 

  _____  

发件人: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] 
发送时间: 2007年9月6日 11:49
收件人: 'tuscany-user@ws.apache.org'
主题: NullPointException error in DAS Beta 1.0 


Hi All , 
 
   I run my test example in DAS beta 1.0 , it will run ok at first time , 
and then run at second time was report a NullPointException , error info as
follow :
 
The line is 
Type root = SDOUtil.createType(typeHelper, getDefaultURI(), "DataGraphRoot",
false);
 
Caused by: java.lang.NullPointerException
 at
org.apache.tuscany.das.rdb.graphbuilder.impl.GraphBuilderMetadata.createDyna
micTypes(GraphBuilderMetadata.java:124)
 at
org.apache.tuscany.das.rdb.graphbuilder.impl.GraphBuilderMetadata.getRootTyp
e(GraphBuilderMetadata.java:91)
 at
org.apache.tuscany.das.rdb.impl.ReadCommandImpl.buildGraph(ReadCommandImpl.j
ava:88)
 at
org.apache.tuscany.das.rdb.impl.ReadCommandImpl.executeQuery(ReadCommandImpl
.java:63)
 at
com.foresee.spiderweb.dataadapter.db.DasServiceImpl.execute(DasServiceImpl.j
ava:321)
 ... 24 more

Why is it  ?  My test example could run correctly in M2.
 
 
Leo