[castor-dev] Approach #1: collection="map"

[Erik.Ostermueller]

On the lastest cut of CVS, I'm trying to marshal/unmarshal a map, like
in this post:

http://www.mail-archive.com/castor-dev@exolab.org/msg06205.html

Marshalling works great. When I unmarshall, there is no data in my
object.
I tried a different approach and had problems there, too.
I'll send the results of Approach #2 in a separate email.

Thanks in advance for looking at this.

//////////   mapping.xml  /////////////////////////////////////////
<mapping>
      <class name="Parent">
          <field name="children" type="Child" collection="map"
              get-name="getChildren"
              set-name="setChildren"> 
              <bind-xml name="string" node="element"/>
          </field>
      </class>
      <class name="Child" auto-complete="true">
           <map-to xml="Child"/>
      </class>
</mapping>      

////////  Parent.java  /////////////////////////////////////////
import java.util.Map;
import java.util.HashMap;

public class Parent {

  HashMap _children = new HashMap();

  public void addChild(Child c) {
     
      _children.put(c.getKey(), c);
  }

  public Child getChild(Object key) {
      return (Child) _children.get(key);
  }

  public Map getChildren() {
      return _children;
  }
  public void setChildren(Map m) {
      _children = (HashMap)m;
  }
}

/////////////   Child.java       //////////////////////////////////
public class Child {
  String firstName = null;
  Object key = null;

  public Child(){}

  public String getFirstName() { 
    return firstName;
  }

  public void setFirstName(String strName) { 
    firstName = strName;
  }
  public void setKey(Object objKey) { 
    key = objKey;
  }
  
  public Object getKey() {
    return key;
  }
  
  public String toString() {
    return firstName;
  }
}



/////////////    HashTest.java        //////////////////////////
import java.util.HashMap;
import java.util.Iterator;
import java.util.Collection;
import java.util.Map;

import java.io.StringWriter;
import java.io.StringReader;

import org.exolab.castor.mapping.Mapping;
import org.exolab.castor.mapping.MappingException;

import org.exolab.castor.xml.Unmarshaller;
import org.exolab.castor.xml.Marshaller;

import java.io.IOException;
import java.io.FileReader;
import java.io.OutputStreamWriter;

import org.xml.sax.InputSource;



public class HashTest {

        public static void main(String[] args) {
          
          Parent p = new Parent();
          
          Child c = null;
          c = new Child(); c.setFirstName("Betty");
c.setKey("betty_key");  p.addChild( c);
          c = new Child(); c.setFirstName("Wilma");
c.setKey("wilma_key");  p.addChild( c );
          c = new Child(); c.setFirstName("Fred");
c.setKey("fred_key");   p.addChild( c );
          c = new Child(); c.setFirstName("Barney");
c.setKey("barney_key"); p.addChild( c  );
          
    testParent(p);
    Mapping      mapping = new Mapping();

    try {
        // 1. Load the mapping information from the file
        mapping.loadMapping( "mapping.xml" );

        StringWriter sw = new StringWriter();
        // 4. marshal the data with and print the XML in the console
        Marshaller marshaller = new Marshaller(sw);
        
        marshaller.setMapping(mapping);
        marshaller.marshal(p);
        System.out.println("Here is the data [" + sw.toString() + "]");

        StringReader sr = new StringReader(sw.toString());
        // 2. Unmarshal the data
        Unmarshaller unmar = new Unmarshaller(mapping);
        Parent newParent = (Parent)unmar.unmarshal(sr);

                ///////////////////////////////////////////////////////
                ///////    
                ///////         P R O B L E M
                ///////
        System.out.println("PROBLEM: Data didn't get unmarshalled!");
        testParent(newParent);

    } catch (Exception e) {
        System.out.println(e);
    }     
        }
  public static void testParent(Parent p) {
    Child c = p.getChild("fred_key");
    System.out.println("just got first child");
    System.out.println("   child: [" + c + "] [" + c.toString() + "]");
          System.out.println("key: Fred_key   child: [" +
p.getChild("fred_key").toString() + "]");
          
          Map kids = p.getChildren();
          
          for(Iterator itr = kids.values().iterator(); itr.hasNext();) {
            Child kid = (Child)itr.next();
            System.out.println("Here is a child [" + kid.toString() + "]
key [" + kid.getKey() + "]");
          }
    
  }
  
}

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