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From "Jed Wesley-Smith (JIRA)" <j...@apache.org>
Subject [jira] Commented: (LUCENE-681) org.apache.lucene.document.Field is Serializable but doesn't have default constructor
Date Mon, 11 Dec 2006 07:48:23 GMT
    [ http://issues.apache.org/jira/browse/LUCENE-681?page=comments#action_12457253 ] 
            
Jed Wesley-Smith commented on LUCENE-681:
-----------------------------------------

worksforme

public class SerializationTest
{
    public static void main(String[] args) throws Exception
    {
        Field field = new Field("name", "value", Field.Store.YES, Field.Index.TOKENIZED);
        System.out.println(field);
        final Object field2 = new SerializationTest().serialize(field);
        System.out.println(field2);
        System.out.println(field == field2);
    }

    Object serialize(Object input) throws IOException, ClassNotFoundException
    {
        ByteArrayOutputStream outBytes = new ByteArrayOutputStream();
        ObjectOutputStream outObjects = new ObjectOutputStream(outBytes);
        outObjects.writeObject(input);

        ByteArrayInputStream inBytes = new ByteArrayInputStream(outBytes.toByteArray());
        ObjectInputStream inObjects = new ObjectInputStream(inBytes);        
        return inObjects.readObject();
    }
}

Its a final class dude, what does it need a default constructor for?

Consider closing.

> org.apache.lucene.document.Field is Serializable but doesn't have default constructor
> -------------------------------------------------------------------------------------
>
>                 Key: LUCENE-681
>                 URL: http://issues.apache.org/jira/browse/LUCENE-681
>             Project: Lucene - Java
>          Issue Type: Bug
>          Components: Other
>    Affects Versions: 1.9, 2.0.0, 2.1, 2.0.1
>         Environment: doesn't depend on environment
>            Reporter: Elijah Epifanov
>            Priority: Critical
>
> when I try to pass Document via network or do anyhing involving serialization/deserialization
I will get an exception.
> the following patch should help (Field.java):
>   public Field () {
>   }
>   private void writeObject (java.io.ObjectOutputStream out)
>           throws IOException {
>     out.defaultWriteObject ();
>   }
>   private void readObject (java.io.ObjectInputStream in)
>           throws IOException, ClassNotFoundException {
>     in.defaultReadObject ();
>     if (name == null) {
>       throw new NullPointerException ("name cannot be null");
>     }
>     this.name = name.intern ();        // field names are interned
>   }
> Maybe other classes do not conform to Serialization requirements too...

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