Oops, I made a change and didn't test it. Doh, This should work better:
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 java.util.Vector; import org.apache.lucene.store.Directory; import org.apache.lucene.store.IndexInput; import org.apache.lucene.store.IndexOutput; final class SegmentInfos { /** The file format version, a negative number. */ /* Works since counter, the old 1st entry, is always >= 0 */ public static final int FORMAT = -1; public int counter = 0; // used to name new segments private Vector vector = new Vector(); /** * counts how often the index has been changed by adding or deleting docs. * starting with the current time in milliseconds forces to create unique * version numbers. */ private long version = System.currentTimeMillis(); public final SegmentInfo info(int i) { return (SegmentInfo) vector.elementAt(i); } public final void read(Directory directory) throws IOException { IndexInput input = directory.openInput(IndexFileNames.SEGMENTS); try { int format = input.readInt(); if (format < 0) { // file contains explicit format info // check that it is a format we can understand if (format < FORMAT) throw new IOException("Unknown format version: " + format); version = input.readLong(); // read version counter = input.readInt(); // read counter } else { // file is in old format without explicit format info counter = format; } for (int i = input.readInt(); i > 0; i--) { // read segmentInfos SegmentInfo si = new SegmentInfo(input.readString(), input .readInt(), directory); vector.addElement(si); } if (format >= 0) { // in old format the version number may be at // the end of the file if (input.getFilePointer() >= input.length()) version = System.currentTimeMillis(); // old file format // without version // number else version = input.readLong(); // read version } } finally { input.close(); } } public final void write(Directory directory) throws IOException { IndexOutput output = directory.createOutput("segments.new"); try { output.writeInt(FORMAT); // write FORMAT output.writeLong(++version); // every write changes the index output.writeInt(counter); // write counter output.writeInt(size()); // write infos for (int i = 0; i < size(); i++) { SegmentInfo si = info(i); output.writeString(si.name); output.writeInt(si.docCount); } } finally { output.close(); } // install new segment info directory.renameFile("segments.new", IndexFileNames.SEGMENTS); } /** * version number when this SegmentInfos was generated. */ public long getVersion() { return version; } /** * Current version number from segments file. */ public static long readCurrentVersion(Directory directory) throws IOException { IndexInput input = directory.openInput(IndexFileNames.SEGMENTS); int format = 0; long version = 0; try { format = input.readInt(); if (format < 0) { if (format < FORMAT) throw new IOException("Unknown format version: " + format); version = input.readLong(); // read version } } finally { input.close(); } if (format < 0) return version; // We cannot be sure about the format of the file. // Therefore we have to read the whole file and cannot simply seek to // the version entry. SegmentInfos sis = new SegmentInfos(); sis.read(directory); return sis.getVersion(); } public int size() { return vector.size(); } public void addElement(Object obj) { vector.addElement(obj); } public void setSize(int size) { vector.setSize(size); } public Object remove(int index) { return vector.remove(index); } public Object set(int minSegment, SegmentInfo info) { return vector.set(minSegment, info); } } --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
