castor

NullPointerException while adding a .class to a MappingTool object

Details

  • Type: Bug Bug
  • Status: Closed Closed
  • Priority: Major Major
  • Resolution: Won't Fix
  • Affects Version/s: 1.2
  • Fix Version/s: 1.3 rc1
  • Component/s: XML tools
  • Labels:
    None
  • Environment:
    Java SDK 1.5
  • Number of attachments :
    0

Description

Hello,

I am using Version 1.2 and I am always getting a NullPointerException while trying to add a new .class to a MappingTool object. Here is my code:

MappingTool mapTool = new MappingTool();
mapTool.addClass(BudgetCode.class);

After a lot of time trying to understand why it was failing, i decided to check the source code of Castor and I have found that the exception arises exactly at this point: MappingTool.java:259

if (_mappings.get(cls) != null)

{ return; }

Basically the error is that _mappings field is not initialized (it is null), so any time it is used, it generates a NullPointerException.

I hope this information will be useful for you to solve it.

Thanks,

Carlos

Activity

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Werner Guttmann added a comment -

Carlos, as part of Castor 1.2, we have introduced quite a few major changes (hence the major version number increase). As a result, your code needs to be changed to 

MappingTool mapTool = new MappingTool();
mapToolsetInternalContext(new org.castor.xml.BackwardCompatibilityContext());
mapTool.addClass(BudgetCode.class);

I hope this makes any sense.

I do acknowledge that there's a lack of information about the MappingTool on the web site. Would you be willing to help us with getting this changed ?

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Werner Guttmann added a comment - Carlos, as part of Castor 1.2, we have introduced quite a few major changes (hence the major version number increase). As a result, your code needs to be changed to MappingTool mapTool = new MappingTool(); mapToolsetInternalContext(new org.castor.xml.BackwardCompatibilityContext()); mapTool.addClass(BudgetCode.class); I hope this makes any sense. I do acknowledge that there's a lack of information about the MappingTool on the web site. Would you be willing to help us with getting this changed ?
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Carlos Garcia Rodriguez added a comment -

Ok, thanks a lot. I am just going to try what you suggest. I agree with you that there is not much information about the MappingTool, that i think it is very useful for non-very specialized users.

Thanks again,

Carlos

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Carlos Garcia Rodriguez added a comment - Ok, thanks a lot. I am just going to try what you suggest. I agree with you that there is not much information about the MappingTool, that i think it is very useful for non-very specialized users. Thanks again, Carlos
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Werner Guttmann added a comment -

I agree with you that there is not much information about the MappingTool, that i think it is very useful for non-very specialized users.

So why don't you come up with an initial draft for a web page that documents the usage of the MappingTool, and I'll refine it and integrate it into the existing web page ?

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Werner Guttmann added a comment - I agree with you that there is not much information about the MappingTool, that i think it is very useful for non-very specialized users. So why don't you come up with an initial draft for a web page that documents the usage of the MappingTool, and I'll refine it and integrate it into the existing web page ?
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Lou Parisi added a comment -

Did you ever get an example for this issue to add to the web page? I will create one if you still need it. I had same problem and took me a little while to find this resolution. I have a working example I could make into a how-to

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Lou Parisi added a comment - Did you ever get an example for this issue to add to the web page? I will create one if you still need it. I had same problem and took me a little while to find this resolution. I have a working example I could make into a how-to
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Werner Guttmann added a comment -

No, I guess I didn't. How about identifying the relevant HTML page(s) where this should b added/changed, and I'll think about the rest ? And if you volunteer to write a HOW-TO, that would be appreciated.

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Werner Guttmann added a comment - No, I guess I didn't. How about identifying the relevant HTML page(s) where this should b added/changed, and I'll think about the rest ? And if you volunteer to write a HOW-TO, that would be appreciated.
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anand added a comment -

I think the details are still not present. I suggest the sample presented bt Werner should be added to the java documentation page for org.exolab.castor.tools.MappingTool itself.

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anand added a comment - I think the details are still not present. I suggest the sample presented bt Werner should be added to the java documentation page for org.exolab.castor.tools.MappingTool itself.
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Werner Guttmann added a comment -

Sure, why not. Feel free to attach a patch .... though above suggestions still make sense.

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Werner Guttmann added a comment - Sure, why not. Feel free to attach a patch .... though above suggestions still make sense.

People

  • Assignee:
    Werner Guttmann
    Reporter:
    Carlos Garcia Rodriguez
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Dates

  • Created:
    Updated:
    Resolved: