?? segmenttermpositions.java
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package org.apache.lucene.index;/** * Copyright 2004 The Apache Software Foundation * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */import java.io.IOException;import org.apache.lucene.store.IndexInput;final class SegmentTermPositionsextends SegmentTermDocs implements TermPositions { private IndexInput proxStream; private int proxCount; private int position; SegmentTermPositions(SegmentReader p) { super(p); this.proxStream = (IndexInput)parent.proxStream.clone(); } final void seek(TermInfo ti) throws IOException { super.seek(ti); if (ti != null) proxStream.seek(ti.proxPointer); proxCount = 0; } public final void close() throws IOException { super.close(); proxStream.close(); } public final int nextPosition() throws IOException { proxCount--; return position += proxStream.readVInt(); } protected final void skippingDoc() throws IOException { for (int f = freq; f > 0; f--) // skip all positions proxStream.readVInt(); } public final boolean next() throws IOException { for (int f = proxCount; f > 0; f--) // skip unread positions proxStream.readVInt(); if (super.next()) { // run super proxCount = freq; // note frequency position = 0; // reset position return true; } return false; } public final int read(final int[] docs, final int[] freqs) { throw new UnsupportedOperationException("TermPositions does not support processing multiple documents in one call. Use TermDocs instead."); } /** Called by super.skipTo(). */ protected void skipProx(long proxPointer) throws IOException { proxStream.seek(proxPointer); proxCount = 0; }}
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