Stream Tokenizer Iterater Adapter not working

[alpdog14]

I have a Stream Tokenizer Iterater Adapter (STIA) class that has a test but it is not passing and was wondering if anyone can help me. I have posted this question on another forum but so far no one has helped. Here is the STIA class:

public class StreamTokenizerIteratorAdapter implements Iterator<Token> {
	
	StreamTokenizer st;
	Iterator<Token> stia;
	
	public StreamTokenizerIteratorAdapter(final StreamTokenizer source) {
		if (source == null)
			throw new IllegalArgumentException("source == null");
		
		st = source;
		Iterator<Token> stia = new StreamTokenizerIteratorAdapter(st);

		
	}

	@Override
	public boolean hasNext() {
		
		
		DefaultToken tempToken = new DefaultToken(st.sval, st.lineno());
		  int token = 0;
		  while (token != StreamTokenizer.TT_EOF){
		   tempToken = new DefaultToken(st.sval, st.lineno());
		  }
		  if (tempToken != null) return true;
		  return false;
	}

	public Token next() {
		
		DefaultToken tempToken = new DefaultToken(st.sval, st.lineno());;
		return tempToken;

	}

	@Override
	public void remove() {
		throw new UnsupportedOperationException();
	}
}

This class has a test which is:

@Test
	public void testBuild() throws IOException {
				
		TokenIteratorIndexBuilder builder = new TokenIteratorIndexBuilder(index);
		st = new StreamTokenizer(new StringReader(s7));
		int token;
		while ((token = st.nextToken()) != StreamTokenizer.TT_EOF) {
			if (token == StreamTokenizer.TT_WORD) {
				Token t = new DefaultToken(st.sval, st.lineno());
				al.add(t);
			}
		}
	builder.buildFrom(al.iterator()); 
	assertEquals(s7index, index);
		
	}

The test is suppose to build a Tokenizer Iterater Index Builder with a STIA wrapped in a StreamTokenizer. So after running the test the two failures I get is this line on TokenIteratorIndexBuilder:

			throw new IllegalArgumentException("index == null");

and the other line is on TestSTIA:

		TokenIteratorIndexBuilder builder = new TokenIteratorIndexBuilder(index);

Sorry for all the code I just would like to explain the issue because there are a few different classes, if anyone can help I would be much appreciated.

[gcalvin]

It's not at all clear to me what you're trying to do (and I suspect it's not entirely clear to you either), but the immediate error seems pretty simple.

@Test
	public void testBuild() throws IOException {
				
		TokenIteratorIndexBuilder builder = new TokenIteratorIndexBuilder(index);
                ...

Where did "index" come from? It wasn't passed in to your method as a parameter, and it wasn't declared within the method. It could be an ivar in your class, but this looks like JUnit code, and I think it's unusual to have ivars in JUnit classes.

-Gary-

[alpdog14]

The STIA test is suppose to create a TIIB, then build the index from a STIA wrapped around a StreamTokenizer,

I have another test for Stream Tokenizer Iterator Builder (STIB) and creating a index works fine for the test, here is the code for that test:

@Test
	public void testBuild() {
		Index index = new DefaultIndexImpl();
		StreamTokenizerIndexBuilder builder = new StreamTokenizerIndexBuilder(index);
		builder.buildFrom(new StreamTokenizer(new StringReader(s7)));
		assertEquals(s7index, index);
	}

Any help to develop the test for STIA would be much appreciated.

[gcalvin]

Well, I don't know your code, but it looks to me that the red line in this test:

@Test
	public void testBuild() {
		[COLOR="Red"]Index index = new DefaultIndexImpl();[/COLOR]
		StreamTokenizerIndexBuilder builder = new StreamTokenizerIndexBuilder(index);
		builder.buildFrom(new StreamTokenizer(new StringReader(s7)));
		assertEquals(s7index, index);
	}

is missing from this test:

@Test
	public void testBuild() throws IOException {
				
		TokenIteratorIndexBuilder builder = new TokenIteratorIndexBuilder(index);
		st = new StreamTokenizer(new StringReader(s7));
		int token;
		while ((token = st.nextToken()) != StreamTokenizer.TT_EOF) {
			if (token == StreamTokenizer.TT_WORD) {
				Token t = new DefaultToken(st.sval, st.lineno());
				al.add(t);
			}
		}
	builder.buildFrom(al.iterator()); 
	assertEquals(s7index, index);
		
	}

-Gary-