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TestPhrasePrefixQuery.javaAPI DocApache Lucene 2.1.03901Wed Feb 14 10:46:36 GMT 2007org.apache.lucene.search

TestPhrasePrefixQuery

public class TestPhrasePrefixQuery extends junit.framework.TestCase
This class tests PhrasePrefixQuery class.
author
Otis Gospodnetic
version
$Id: TestPhrasePrefixQuery.java 472959 2006-11-09 16:21:50Z yonik $

Fields Summary
Constructors Summary
public TestPhrasePrefixQuery(String name)

        super(name);
    
Methods Summary
public voidtestPhrasePrefix()

        RAMDirectory indexStore = new RAMDirectory();
        IndexWriter writer = new IndexWriter(indexStore, new SimpleAnalyzer(), true);
        Document doc1 = new Document();
        Document doc2 = new Document();
        Document doc3 = new Document();
        Document doc4 = new Document();
        Document doc5 = new Document();
        doc1.add(new Field("body", "blueberry pie", Field.Store.YES, Field.Index.TOKENIZED));
        doc2.add(new Field("body", "blueberry strudel", Field.Store.YES, Field.Index.TOKENIZED));
        doc3.add(new Field("body", "blueberry pizza", Field.Store.YES, Field.Index.TOKENIZED));
        doc4.add(new Field("body", "blueberry chewing gum", Field.Store.YES, Field.Index.TOKENIZED));
        doc5.add(new Field("body", "piccadilly circus", Field.Store.YES, Field.Index.TOKENIZED));
        writer.addDocument(doc1);
        writer.addDocument(doc2);
        writer.addDocument(doc3);
        writer.addDocument(doc4);
        writer.addDocument(doc5);
        writer.optimize();
        writer.close();

        IndexSearcher searcher = new IndexSearcher(indexStore);

        //PhrasePrefixQuery query1 = new PhrasePrefixQuery();
        MultiPhraseQuery query1 = new MultiPhraseQuery();
        //PhrasePrefixQuery query2 = new PhrasePrefixQuery();
        MultiPhraseQuery query2 = new MultiPhraseQuery();
        query1.add(new Term("body", "blueberry"));
        query2.add(new Term("body", "strawberry"));

        LinkedList termsWithPrefix = new LinkedList();
        IndexReader ir = IndexReader.open(indexStore);

        // this TermEnum gives "piccadilly", "pie" and "pizza".
        String prefix = "pi";
        TermEnum te = ir.terms(new Term("body", prefix + "*"));
        do {
            if (te.term().text().startsWith(prefix))
            {
                termsWithPrefix.add(te.term());
            }
        } while (te.next());

        query1.add((Term[])termsWithPrefix.toArray(new Term[0]));
        query2.add((Term[])termsWithPrefix.toArray(new Term[0]));

        Hits result;
        result = searcher.search(query1);
        assertEquals(2, result.length());

        result = searcher.search(query2);
        assertEquals(0, result.length());