/**
* Tests the IndexReader.getFieldNames implementation
*
* @throws Exception on error
*/
public void testFilterIndexReader() throws Exception {
Directory directory = newDirectory();
IndexWriter writer =
new IndexWriter(
directory, newIndexWriterConfig(TEST_VERSION_CURRENT, new MockAnalyzer(random)));
Document d1 = new Document();
d1.add(newField("default", "one two", Field.Store.YES, Field.Index.ANALYZED));
writer.addDocument(d1);
Document d2 = new Document();
d2.add(newField("default", "one three", Field.Store.YES, Field.Index.ANALYZED));
writer.addDocument(d2);
Document d3 = new Document();
d3.add(newField("default", "two four", Field.Store.YES, Field.Index.ANALYZED));
writer.addDocument(d3);
writer.close();
IndexReader reader = new TestReader(IndexReader.open(directory, true));
TermEnum terms = reader.terms();
while (terms.next()) {
assertTrue(terms.term().text().indexOf('e') != -1);
}
terms.close();
TermPositions positions = reader.termPositions(new Term("default", "one"));
while (positions.next()) {
assertTrue((positions.doc() % 2) == 1);
}
int NUM_DOCS = 3;
TermDocs td = reader.termDocs(null);
for (int i = 0; i < NUM_DOCS; i++) {
assertTrue(td.next());
assertEquals(i, td.doc());
assertEquals(1, td.freq());
}
td.close();
reader.close();
directory.close();
}
public void seek(TermEnum terms) throws IOException {
original.seek(terms);
docFreq = terms.docFreq();
pointer = -1;
if (docFreq > postingMaps.length) { // grow postingsMap
PostingMap[] newMap = new PostingMap[docFreq];
System.arraycopy(postingMaps, 0, newMap, 0, postingMaps.length);
for (int i = postingMaps.length; i < docFreq; i++) {
newMap[i] = new PostingMap();
}
postingMaps = newMap;
}
out.reset();
int i = 0;
while (original.next()) {
PostingMap map = postingMaps[i++];
map.newDoc = oldToNew[original.doc()]; // remap the newDoc id
map.offset = out.getFilePointer(); // save pointer to buffer
final int tf = original.freq(); // buffer tf & positions
out.writeVInt(tf);
int prevPosition = 0;
for (int j = tf; j > 0; j--) { // delta encode positions
int p = original.nextPosition();
out.writeVInt(p - prevPosition);
prevPosition = p;
}
}
out.flush();
docFreq = i; // allow for deletions
Arrays.sort(postingMaps, 0, docFreq); // resort by mapped doc ids
// HeapSorter.sort(postingMaps,docFreq); // TODO MC - due to the lack of space
// NOTE: this might be substantially faster if RAMInputStream were public
// and supported a reset() operation.
in = tempDir.openInput(TEMP_FILE);
}
public void close() throws IOException {
original.close();
}