Kumar-
I used this reference: http://castor.codehaus.org/xml-mapping.html to
generate the following mapping file:
<?xml version="1.0"?>
<!DOCTYPE ... (omitted) ...>
<mapping>
<class name="castor.mettu.SLIR">
<map-to xml="slir" />
<field name="msids" type="castor.mettu.MSID" collection="collection">
<bind-xml name="msid" location="msids" node="element" />
</field>
</class>
<class name="castor.mettu.MSID">
<map-to xml="blah-blah" />
<field name="type" type="string" direct="true">
<bind-xml name="type" node="attribute" />
</field>
<field name="value" type="string" direct="true">
<bind-xml node="text" />
</field>
</class>
</mapping>
Which using code included at the end of this email generated the
following output:
Castor Output:
<?xml version="1.0" encoding="UTF-8"?>
<slir>
<msids>
<msid type="mdn">str1</msid>
<msid type="mdn">str2</msid>
</msids>
</slir>
Reconstructed Object:
MSID type = mdn, value = str1
MSID type = mdn, value = str2
I believe this fits your original email. The only major item worth
mentioning is the reference document doesn't mention a collection type
"list" as built into Castor (at least in mapping), so I used
"collection" for the field msids. There is an "arraylist" value that
can be used in that location. As a side note, examine mapping
definition for MSID, where I specify that it should map to an xml
element "blah-blah"; this demonstrates that Castor is using the
specified xml name for the field in SLIR not the map-to element for MSID
(I think map-to is mostly used for root elements).
Let me know if you have any more questions. In general the mapping
files are fairly easy to figure out with a little trial and error, but
the above reference yields 99% of what is needed for all but the most
complex mappings.
Thanks,
Stephen
Driver code snippet (error handling removed):
MSID msid1 = new MSID();
msid1.type = "mdn";
msid1.value = "str1";
MSID msid2 = new MSID();
msid2.type = "mdn";
msid2.value = "str2";
List msids = new ArrayList();
msids.add( msid1 );
msids.add( msid2 );
SLIR slir = new SLIR();
slir.setMsids( msids );
Mapping myMap = new Mapping();
myMap.loadMapping( MettuDriver.class.getResource(
"/castor/mettu/mettuMapping.xml" ) );
StringWriter myWriter = new StringWriter();
Marshaller m1 = new Marshaller( myWriter );
m1.setMapping( myMap );
m1.marshal( slir );
System.out.println( "Castor Output: " );
System.out.println( myWriter.getBuffer().toString() );
Unmarshaller um1 = new Unmarshaller( myMap );
StringReader myReader = new StringReader(
myWriter.getBuffer().toString() );
SLIR newSLIR = (SLIR)um1.unmarshal( myReader );
System.out.println( "Reconstructed Object: " );
Iterator iter = newSLIR.getMsids().iterator();
while( iter.hasNext() ) {
MSID curMSID = (MSID)iter.next();
System.out.println( "MSID type = " + curMSID.type + ",
value = " + curMSID.value );
}
Kumar Mettu wrote:
Hi,
I couldn't find help on how to do mapping of this file for XML to my
java objects. I am hoping there is a better way to do this. I already
have existing java objects for which i am hoping castor can do XML to
Java mapping.
<slir>
<msids>
<msid type="mdn">str1</msid>
<msid type="mdn">str2</msid>
</msids>
</slir>
I have the following classes:
public class MSID {
public String type;
public String value;
}
public class SLIR {
private List msids;
public List getMsids() {
return msids;
}
public void setMsids(List msids) {
this.msids = msids;
}
}
Any help on mapping file is of great help.
Thanks,
Kumar.
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