Question

I’m using Lucene APIs, and I get the following error on this line of my code:

import org.apache.lucene.document.Document;
import org.apache.lucene.document.Field;
import org.apache.lucene.document.Fieldable;

...

Document _document  = new Document();
_document.add(new Field("type", document.getType()));

Error:
CollectionIndexer.java:34: cannot find symbol
symbol : method add(org.apache.lucene.document.Field)
location: class CollectionIndexer.Document
_document.add(new Field(“type”, document.getType()));

This is the documentation about the method:
http://lucene.apache.org/java/3_0_3/api/all/org/apache/lucene/document/Document.html#add(org.apache.lucene.document.Fieldable)

thanks

Update: javac -cp commons-digester-2.1/commons-digester-2.1.jar:lucene-core-3.0.3.jar myApp.java

Answer 1

The problem comes from the fact that your document.getType() method returns a String and there
is no constructor in the Field class that matches your call.
See http://lucene.apache.org/java/3_0_3/api/all/org/apache/lucene/document/Field.html.

If I test your code in my environment Eclipse says:

The constructor Field(String, String) is undefined

Maybe you could do as the following:

Document _document = new Document();
_document.add(new Field("type", document.getType().getBytes(), Store.YES);
// Or document.add(new Field("type", document.getType().getBytes(), Store.NO);

UPDATE after source code submission ——————–

The problem comes from the fact that in your class you have an inner-class called Document. There is a name conflict between your Document class and the Lucene’s one. When you instanciate your document with the line Document _document = new Document(); you’re actually instanciating YOUR Document class. That’s why the compiler cannot find the add method.

Multiple solution:

a. Instanciate the Document prefixing it with the Lucene package name

org.apache.lucene.document.Document _document = new org.apache.lucene.document.Document();

b. Rename your inner class so that you don’t have any name conflict.