I had a brief experience with collection="array" the other day. Here's the skinny:
public class ArrayTest
{
private Foo[] _foos;
public Foo[] getFoos()
{
return _foos;
}
//THIS IS REQUIRED
public void setFoos(Foo[] foos)
{
_foos = foos;
}
}
<mapping>
<class name="ArrayTest">
<map-to xml="ArrayTest"/>
<field name="foos" type="Foo" collection="array">
<bind-xml name="foo"/>
</field>
</class>
</mapping>
So, if I create an ArrayTest object and marshall it you get:
<ArrayTest>
<foo>...</foo>
<foo>...</foo>
<foo>...</foo>
</ArrayTest>
Now when you unmarshall this, an ArrayTest is created, but setFoos() is called 3 times
:( You get a call for each element of the array, with all the elements processed so
far, so the 1st call has 1 element in the array, the 2nd 2, the 3rd 3 and so on.
--m
-----Original Message-----
From: Bruce Snyder [mailto:[EMAIL PROTECTED]]
Sent: Thursday, July 18, 2002 5:58 PM
To: [EMAIL PROTECTED]
Subject: Re: [castor-dev] mapping - collection types
This one time, at band camp, Jamie De Wet said:
JDW>In the abstract class TransactionType -- Castor creates a Vector
JDW>financialList; -- the return type of the method getFinancial() is
JDW>Financial[] -- eg.
JDW>
JDW>public Financial[] getFinancial() {
JDW> int size = _financialList.size();
JDW> Financial[] mArray = new Financial[size];
JDW> for (int index = 0; index < size; index++) {
JDW> mArray[index] = (Financial) _financialList.elementAt(index);
JDW> }
JDW> return mArray;
JDW>}
JDW>
JDW>My problem comes in using mapping file where I don't know how to set the
JDW>collection if my return type in my class is Financial[] and not something
JDW>like Vestor, Array, Enumeration etc.
JDW>
JDW>eg of Mapping
JDW><mapping>
JDW> <class name="jdo.databinding.Transaction" identity="ddId">
JDW> <description>Transaction</description>
JDW> <map-to table="transaction" xml="transaction"/>
JDW> <field name="ddId">
JDW> <sql name="dd_id" type="integer"/>
JDW> <bind-xml name="ddId" node="attribute"/>
JDW> </field>
JDW> <field name="name">
JDW> <sql name="name"/>
JDW> <bind-xml name="name" node="element"/>
JDW> </field>
JDW> <!-- Transaction has reference to Financial - many
JDW>financials per transaction -->
JDW> <field name="financial" type="jdo.databinding.Financial"
JDW>collection="Vector"> ------ problem using this line as my collection
JDW>should be Financial[]
JDW> <sql many-key="trans_id"/>
JDW> <bind-xml name="financial" node="element"/>
JDW> </field>
JDW> </class>
Jamie,
I've not used Arrays myself, but have you tried setting the
collection attribute to array instead of vector?
http://www.castor.org/jdo-mapping.html#The-%3Cfield%3E-element
I'm curious to know the outcome of this so that I can provide an example
of using an array as a collection.
Bruce
--
perl -e 'print unpack("u30","<0G)U8V4\@4VYY9&5R\"F9E<G)E=\$\!F<FEI+F-O;0\`\`");'
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