[Simple-support] Writing to XML fails

[Miha V. <mih...@gm...>]

Hi Niall,

first off, thanks for the great library. But I'm having trouble fitting 
the following together:

package com.mycompany.simpletest;

import org.simpleframework.xml.Element;
import org.simpleframework.xml.Root;

@Root(name = "pair")
public class Pair<A, B> {
     @Element
     private final A first;
     @Element
     private final B second;

     public Pair(A first, B second) {
         this.first = first;
         this.second = second;
     }

     public A getFirst() { return first; }

     public B getSecond() { return second; }
}
------------------
package com.mycompany.simpletest;

import java.util.ArrayList;
import java.util.List;
import org.simpleframework.xml.Element;
import org.simpleframework.xml.ElementList;
import org.simpleframework.xml.Root;

@Root(name = "test")
public class Test {

     @Root(name = "element1")
     public class Info {
         @Element
         private String name;

         public Info(String name) {
             this.name = name;
         }
     }

     @ElementList(name = "list")
     private List<Pair<Info, Info>> list;

     public Test() {
         list = new ArrayList<>();
     }

     public void add(String s1, String s2) {
         Info i1 = new Info(s1);
         Info i2 = new Info(s2);
         Pair<Info, Info> p = new Pair<>(i1, i2);
         list.add(p);
     }
}
------------------
package com.mycompany.simpletest;

import java.io.FileOutputStream;
import org.simpleframework.xml.Serializer;
import org.simpleframework.xml.convert.AnnotationStrategy;
import org.simpleframework.xml.core.Persister;
import org.simpleframework.xml.strategy.Strategy;

public class SimpleTest {

     public static void main(String[] args) {
         Test t1 = new Test();
         t1.add("a", "b");
         t1.add("b", "c");

         try {
             FileOutputStream out = new FileOutputStream("test.xml");

             Strategy strategy = new AnnotationStrategy();
             Serializer serializer = new Persister(strategy);
             serializer.write(t1, out);


             out.close();
         } catch (Exception e) {
             e.printStackTrace();
         }
     }
}


And this is the result:

org.simpleframework.xml.core.ConstructorException: Can not construct 
inner class com.mycompany.simpletest.Test$Info
     at 
org.simpleframework.xml.core.ConstructorScanner.scan(ConstructorScanner.java:122)
     at 
org.simpleframework.xml.core.ConstructorScanner.<init>(ConstructorScanner.java:73)
     at 
org.simpleframework.xml.core.ClassScanner.<init>(ClassScanner.java:109)
     at 
org.simpleframework.xml.core.ObjectScanner.<init>(ObjectScanner.java:78)
     at 
org.simpleframework.xml.core.ScannerFactory.getInstance(ScannerFactory.java:81)
     at org.simpleframework.xml.core.Support.getScanner(Support.java:357)
     at org.simpleframework.xml.core.Source.getScanner(Source.java:271)
     at org.simpleframework.xml.core.Source.getCaller(Source.java:300)
     at 
org.simpleframework.xml.core.Composite.writeReplace(Composite.java:1147)
     at 
org.simpleframework.xml.core.Composite.writeUnion(Composite.java:1124)
     at 
org.simpleframework.xml.core.Composite.writeElements(Composite.java:1098)
     at 
org.simpleframework.xml.core.Composite.writeSection(Composite.java:1004)
     at org.simpleframework.xml.core.Composite.write(Composite.java:975)
     at org.simpleframework.xml.core.Composite.write(Composite.java:952)
     at org.simpleframework.xml.core.Traverser.write(Traverser.java:236)
     at 
org.simpleframework.xml.core.CompositeList.write(CompositeList.java:248)
     at 
org.simpleframework.xml.core.Composite.writeElement(Composite.java:1256)
     at 
org.simpleframework.xml.core.Composite.writeElement(Composite.java:1239)
     at 
org.simpleframework.xml.core.Composite.writeUnion(Composite.java:1127)
     at 
org.simpleframework.xml.core.Composite.writeElements(Composite.java:1098)
     at 
org.simpleframework.xml.core.Composite.writeSection(Composite.java:1004)
     at org.simpleframework.xml.core.Composite.write(Composite.java:975)
     at org.simpleframework.xml.core.Composite.write(Composite.java:952)
     at org.simpleframework.xml.core.Traverser.write(Traverser.java:236)
     at org.simpleframework.xml.core.Traverser.write(Traverser.java:208)
     at org.simpleframework.xml.core.Traverser.write(Traverser.java:186)
     at org.simpleframework.xml.core.Persister.write(Persister.java:1180)
     at org.simpleframework.xml.core.Persister.write(Persister.java:1162)
     at org.simpleframework.xml.core.Persister.write(Persister.java:1140)
     at org.simpleframework.xml.core.Persister.write(Persister.java:1259)
     at org.simpleframework.xml.core.Persister.write(Persister.java:1241)
     at org.simpleframework.xml.core.Persister.write(Persister.java:1222)
     at com.mycompany.simpletest.SimpleTest.main(SimpleTest.java:31)


Can you please help?

Thanks and br, Miha