Re: [castor-user] Collection of Collections

Sun, 21 Oct 2007 01:15:08 -0700 

Hi,
for the xsi:type attribute to be disappear, you'll have to change the following field mapping: 

<field name="collection" collection="arraylist">
   <bind-xml name="collection"/>
</field>

to

<field name="collection" type="MyCollectionItem" collection="arraylist">
   <bind-xml name="collection"/>
</field>

Regards
Werner

[EMAIL PROTECTED] wrote:

Hello Ralf,

now I managed to get what I want! I started the other way round as
you suggestet by marshalling my objects.

My Root Object:
import java.util.ArrayList;
import java.util.Collection;

public class Root {
    private Collection collection;

    public Root() {
        this.collection = new ArrayList();
        MyCollectionItem item1 = new MyCollectionItem();
        item1.setValue("foo");
        MyCollectionItem item2 = new MyCollectionItem();
        item2.setValue("bar");
        Collection innerCollection1 = new ArrayList();
        innerCollection1.add(item1);
        innerCollection1.add(item2);
        MyCollectionItem item3 = new MyCollectionItem();
        item3.setValue("baz");
        Collection innerCollection2 = new ArrayList();
        innerCollection2.add(item3);
        this.collection.add(innerCollection1);
        this.collection.add(innerCollection2);
    }

    public Collection getCollection() {
        return collection;
    }

    public void setCollection(Collection collection) {
        this.collection = collection;
    }
}

My sample class contained in my inner collection:
public class MyCollectionItem {
    private String value;

    public String getValue() {
        return value;
    }

    public void setValue(String value) {
        this.value = value;
    }
}

My mapping.xml:
<?xml version="1.0"?>
<!DOCTYPE mapping PUBLIC "-//EXOLAB/Castor Mapping DTD Version 1.0//EN" 
"http://castor.org/mapping.dtd";>
<mapping>
  <class name="Root">
    <map-to xml="collection-of-collections" />
    <field name="collection" collection="arraylist">
      <bind-xml name="collection"/>
    </field>
  </class>
  <class name="MyCollectionItem">
    <map-to xml="collection-item"/>
    <field name="value">
      <bind-xml node="text"/>
    </field>
  </class>
</mapping>

The resulting xml (have to get rid of the schema information, but I'll find out 
how...):
<collection-of-collections>
        <collection xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"; 
xsi:type="java:java.util.ArrayList">
                <collection-item 
xsi:type="collection-item">foo</collection-item>
                <collection-item 
xsi:type="collection-item">bar</collection-item>
        </collection>
        <collection xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"; 
xsi:type="java:java.util.ArrayList">
                <collection-item 
xsi:type="collection-item">baz</collection-item>
        </collection>
</collection-of-collections>

In my opinion this could be a example of using collecitons of collections for 
the test suite. I wasn't able to get the test working
ctfrun -text 
../xmlctf/tests/MasterTestSuite/mapping/collections\CollectionOfCollections
... some stuff ...
There was 1 failure:
1) Test mapping of Collection of 
Collection#Test01_ReferenceDocument(org.castor.xmlctf.TestWithReferenceDocument)junit.framework.AssertionFailedError:
 Exception
 Unmarshaling from disk org.exolab.castor.xml.MarshalException{File: [not 
available]; line: 6; column: 17}
        at 
org.castor.xmlctf.TestWithReferenceDocument.runTest(TestWithReferenceDocument.java:168)
        at 
org.castor.xmlctf.CastorTestSuiteRunner.main(CastorTestSuiteRunner.java:167)

I used MapOfCollections test as a basis and changed all files and values.

Best regards
-------- Original-Nachricht --------

Datum: Fri, 19 Oct 2007 14:53:09 +0200
Von: Ralf Joachim <[EMAIL PROTECTED]>
An: [email protected]
Betreff: Re: [castor-user] Collection of Collections



BaBowe, I usually start marshalling my objects as it is much easier to 
tune your mapping at marshalling because you can see the XML what castor 
creates with your mapping. In every case I had unmarshalling also worked 
as expected thereafter.


Regards
Ralf

[EMAIL PROTECTED] schrieb:

Hi,

I still don't know how to get it right. Example for a collection of

collections:

<collection-of-collections>
  <collection>
    <collection-item>foo</collection-item>
    <collection-item>bar</collection-item>
  </collection>
  <collection>
    <collection-item>baz</collection-item>
  </collection>
</collection-of-collections>

My mapping so far:
<mapping>
  <class name="CollectionItem">
    <map-to xml="collection-of-collections" />
    <field name="collection" collection="collection">
      <bind-xml name="collection">
        <class name="CollectionItem">
          <field name="collection" collection="collection"

type="string">

            <bind-xml name="collection-item" />
          </field>
        </class>
      </bind-xml>
    </field>
  </class>
</mapping>

The CollectionItem class:
import java.util.Collection;
public class CollectionItem {
    private Collection collection;
    public Collection getCollection() {
        return collection;
    }
    public void setCollection(Collection collection) {
        this.collection = collection;
    }
}

Exception when unmarshalling XML:
java.lang.NullPointerException
        at

org.exolab.castor.xml.util.XMLFieldDescriptorImpl.hashCode(XMLFieldDescriptorImpl.java:713)

        at java.util.HashMap.hash(HashMap.java:261)
        at java.util.HashMap.put(HashMap.java:379)
        at java.util.HashSet.add(HashSet.java:192)
        at

org.exolab.castor.xml.UnmarshalState.markAsUsed(UnmarshalState.java:204)

        at

org.exolab.castor.xml.UnmarshalHandler.endElement(UnmarshalHandler.java:986)

        at

org.exolab.castor.xml.util.DOMEventProducer.process(DOMEventProducer.java:250)

        at

org.exolab.castor.xml.util.DOMEventProducer.process(DOMEventProducer.java:183)

        at

org.exolab.castor.xml.util.DOMEventProducer.processChildren(DOMEventProducer.java:334)

        at

org.exolab.castor.xml.util.DOMEventProducer.process(DOMEventProducer.java:248)

        at

org.exolab.castor.xml.util.DOMEventProducer.process(DOMEventProducer.java:183)

        at

org.exolab.castor.xml.util.DOMEventProducer.start(DOMEventProducer.java:111)

        at org.exolab.castor.xml.Unmarshaller.unmarshal(Unmarshaller.java:631)
        at org.exolab.castor.xml.Unmarshaller.unmarshal(Unmarshaller.java:741)

-------- Original-Nachricht --------

Datum: Fri, 19 Oct 2007 12:40:04 +0200
Von: Werner Guttmann <[EMAIL PROTECTED]>
An: [email protected]
Betreff: Re: [castor-user] Collection of Collections
Hi

[EMAIL PROTECTED] wrote:

I couldn't find the example. I just found


castor-1.1.2.1\xmlctf\tests\MasterTestSuite\mapping\collections\Maps\NestedMaps\MapOfCollections.

I don't know how to transfer that example to work with collection of
collections.

Well, within the mapping for the Result class, you will have another 
collection mapping for your nested collection. Nothing special, just a 
plain field mapping.

Another question was regarded to collections: Is there a way to map a

collection containing different types. <root> <mycollection> 
<string>test1</string> <integer>1</integer> <integer>2</integer> 
<string>test2</string> </mycollection> </root>

Not to my knowledge.


I couldn't find a example for this and can't imagine how to do it as
I think that a type attribute for a <field collection="collection"/>
is required. -------- Original-Nachricht --------

Datum: Thu, 18 Oct 2007 13:47:21 +0200 Von: Werner Guttmann
<[EMAIL PROTECTED]> An: [email protected] Betreff: Re:
[castor-user] Collection of Collections

Yes, it does. Have a look at teh current CTF test suite that has 
examples on how to map nested collections.


Werner

[EMAIL PROTECTED] wrote:

Hello,

I would like to map the following XML to Java:


<result> <bar>baz</bar> <rows> <row> <integer>123</integer> 
<integer>321</integer> <string>foo</string> </row> <row> 
<integer>123</integer> <integer isNull="true"/> 
<string>foo</string> </row> </rows> </result>


In Java words this is a Result class with one String bar
attribute and a rows Collection. The Collection contains row
elements which are themself Collection (a row can a have
arbitrary number of cells). My question is: does Castor support
Collections of Collections (rows->row->cell)? How would the
mapping xml file look like? If there is a problem for castor with
the mixed types of the cells, the following xml would be okay
too:

<result> <bar>baz</bar> <rows> <row> <col
type="integer">123</col> <col type="integer">321</col> <col
type="string">foo</col> </row> <row> <col
type="integer">123</col> <col type="integer" isNull="true"/> <col
type="string">foo</col> </row> </rows> </result>

Kind regards

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