01: /* Copyright (C) 2004 - 2007 db4objects Inc. http://www.db4o.com
02:
03: This file is part of the db4o open source object database.
04:
05: db4o is free software; you can redistribute it and/or modify it under
06: the terms of version 2 of the GNU General Public License as published
07: by the Free Software Foundation and as clarified by db4objects' GPL
08: interpretation policy, available at
09: http://www.db4o.com/about/company/legalpolicies/gplinterpretation/
10: Alternatively you can write to db4objects, Inc., 1900 S Norfolk Street,
11: Suite 350, San Mateo, CA 94403, USA.
12:
13: db4o is distributed in the hope that it will be useful, but WITHOUT ANY
14: WARRANTY; without even the implied warranty of MERCHANTABILITY or
15: FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
16: for more details.
17:
18: You should have received a copy of the GNU General Public License along
19: with this program; if not, write to the Free Software Foundation, Inc.,
20: 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
21: package com.db4o.internal.ix;
22:
23: import com.db4o.foundation.*;
24: import com.db4o.internal.*;
25: import com.db4o.internal.freespace.*;
26:
27: /**
28: * An addition to a field index.
29: */
30: public class IxAdd extends IxPatch {
31:
32: boolean _keepRemoved;
33:
34: public IxAdd(IndexTransaction a_ft, int a_parentID, Object a_value) {
35: super (a_ft, a_parentID, a_value);
36: }
37:
38: void beginMerge() {
39: super .beginMerge();
40: handler().prepareComparison(
41: IxDeprecationHelper.comparableObject(handler(),
42: trans(), _value));
43: }
44:
45: public void visit(Object obj) {
46: ((Visitor4) obj).visit(new Integer(_parentID));
47: }
48:
49: public void visit(Visitor4 visitor, int[] lowerAndUpperMatch) {
50: visitor.visit(new Integer(_parentID));
51: }
52:
53: public void freespaceVisit(FreespaceVisitor visitor, int index) {
54: visitor.visit(_parentID, ((Integer) _value).intValue());
55: }
56:
57: public int write(Indexable4 a_handler, StatefulBuffer a_writer) {
58: a_handler.writeIndexEntry(a_writer, _value);
59: a_writer.writeInt(_parentID);
60: a_writer.writeForward();
61: return 1;
62: }
63:
64: public String toString() {
65: String str = "IxAdd "
66: + _parentID
67: + "\n "
68: + IxDeprecationHelper.comparableObject(handler(),
69: trans(), _value);
70: return str;
71: }
72:
73: public void visitAll(IntObjectVisitor visitor) {
74: visitor.visit(_parentID, IxDeprecationHelper.comparableObject(
75: handler(), trans(), _value));
76: }
77:
78: public Object shallowClone() {
79: IxAdd add = new IxAdd(_fieldTransaction, _parentID, _value);
80: super.shallowCloneInternal(add);
81: add._keepRemoved = _keepRemoved;
82: return add;
83: }
84: }
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