1 package net.jxta.impl.xindice.core.indexer;
5 * The Apache Software License, Version 1.1
8 * Copyright (c) 1999 The Apache Software Foundation. All rights reserved.
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions and the following disclaimer.
17 * 2. Redistributions in binary form must reproduce the above copyright
18 * notice, this list of conditions and the following disclaimer in
19 * the documentation and/or other materials provided with the
22 * 3. The end-user documentation included with the redistribution,
23 * if any, must include the following acknowledgment:
24 * "This product includes software developed by the
25 * Apache Software Foundation (http://www.apache.org/)."
26 * Alternately, this acknowledgment may appear in the software itself,
27 * if and wherever such third-party acknowledgments normally appear.
29 * 4. The names "Xindice" and "Apache Software Foundation" must
30 * not be used to endorse or promote products derived from this
31 * software without prior written permission. For written
32 * permission, please contact apache@apache.org.
34 * 5. Products derived from this software may not be called "Apache",
35 * nor may "Apache" appear in their name, without prior written
36 * permission of the Apache Software Foundation.
38 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
39 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
40 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
41 * DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
42 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
43 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
44 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
45 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
46 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
47 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
48 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
50 * ====================================================================
52 * This software consists of voluntary contributions made by many
53 * individuals on behalf of the Apache Software Foundation and was
54 * originally based on software copyright (c) 1999-2001, The dbXML
55 * Group, L.L.C., http://www.dbxmlgroup.com. For more
56 * information on the Apache Software Foundation, please see
57 * <http://www.apache.org/>.
62 import net.jxta.impl.xindice.core.DBException;
63 import net.jxta.impl.xindice.core.data.Key;
64 import net.jxta.impl.xindice.core.filer.BTree;
65 import net.jxta.impl.xindice.core.filer.BTreeCorruptException;
68 import java.io.IOException;
72 * NameIndexer is a basic implementation of the Indexer interface.
73 * It is used for maintaining element and element@attribute unique
77 public final class NameIndexer extends BTree implements Indexer {
79 private static final short PAGESIZE = 4096;
80 // TODO: MAXKEYSIZE might need tuning
81 private static final short MAXKEYSIZE = 256;
83 private FileHeader fileHeader;
85 public NameIndexer() {
87 fileHeader = getFileHeader();
88 fileHeader.setPageSize(PAGESIZE);
89 fileHeader.setMaxKeySize(MAXKEYSIZE);
92 public void setLocation(String dir, String file) {
93 setFile(new File(dir, file + ".idx"));
96 public synchronized void remove(Key key) throws DBException {
99 } catch (IOException e) {
100 throw new BTreeCorruptException("Corruption detected on remove");
104 public synchronized void add(Key key, long pos) throws DBException {
108 } catch (IOException e) {
109 throw new BTreeCorruptException("Corruption detected on add");