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(); }