Question

I need to serialize a Lucene.net Document instance. When I try the following

    public bool Serialize(Document doc)
    {
        XmlSerializer serializer = new XmlSerializer(doc.GetType());
        TextWriter writer = new StreamWriter(Path.Combine(_indexPath, String.Format("{0}{1}",Guid.NewGuid().ToString(), ".xml")));
        serializer.Serialize(writer, doc);
        writer.Close();
        return true;
    }

I receive an exception because the Lucene Field type doesn’t have a parameterless constructor.

"Lucene.Net.Documents.Field cannot be serialized because it does not have a parameterless constructor."

Any way around this? Is there a more generally accepted way of serializing a Lucene.Net document?

Answer 1

Even if you could, It wouldn’t help you much since Document‘s all members are java style getXXX/setXXX methods(not properties or fields). The simplest way would be to form Field/Value pairs by yourself and then serialize them.

For example, you can fill & serialize MyDocument class

public class MyDocument
{
    public List<MyField> Fields;
}

public class MyField
{
    public string Field;
    public string Text;
    public bool Indexed;
    public bool Stored;
}