001: package com.quadcap.sql;
002:
003: /* Copyright 1999 - 2003 Quadcap Software. All rights reserved.
004: *
005: * This software is distributed under the Quadcap Free Software License.
006: * This software may be used or modified for any purpose, personal or
007: * commercial. Open Source redistributions are permitted. Commercial
008: * redistribution of larger works derived from, or works which bundle
009: * this software requires a "Commercial Redistribution License"; see
010: * http://www.quadcap.com/purchase.
011: *
012: * Redistributions qualify as "Open Source" under one of the following terms:
013: *
014: * Redistributions are made at no charge beyond the reasonable cost of
015: * materials and delivery.
016: *
017: * Redistributions are accompanied by a copy of the Source Code or by an
018: * irrevocable offer to provide a copy of the Source Code for up to three
019: * years at the cost of materials and delivery. Such redistributions
020: * must allow further use, modification, and redistribution of the Source
021: * Code under substantially the same terms as this license.
022: *
023: * Redistributions of source code must retain the copyright notices as they
024: * appear in each source code file, these license terms, and the
025: * disclaimer/limitation of liability set forth as paragraph 6 below.
026: *
027: * Redistributions in binary form must reproduce this Copyright Notice,
028: * these license terms, and the disclaimer/limitation of liability set
029: * forth as paragraph 6 below, in the documentation and/or other materials
030: * provided with the distribution.
031: *
032: * The Software is provided on an "AS IS" basis. No warranty is
033: * provided that the Software is free of defects, or fit for a
034: * particular purpose.
035: *
036: * Limitation of Liability. Quadcap Software shall not be liable
037: * for any damages suffered by the Licensee or any third party resulting
038: * from use of the Software.
039: */
040:
041: import java.io.ByteArrayOutputStream;
042: import java.io.Externalizable;
043: import java.io.IOException;
044: import java.io.ObjectInput;
045: import java.io.ObjectOutput;
046:
047: import java.util.Vector;
048:
049: import java.sql.ResultSet;
050: import java.sql.SQLException;
051:
052: import com.quadcap.sql.io.ObjectInputStream;
053: import com.quadcap.sql.io.ObjectOutputStream;
054:
055: import com.quadcap.sql.index.Btree;
056:
057: import com.quadcap.sql.file.BlockFile;
058:
059: import com.quadcap.sql.types.ValueInteger;
060:
061: import com.quadcap.util.Debug;
062: import com.quadcap.util.Util;
063:
064: /**
065: * Index constraint for indexes which do not require unique values.
066: *
067: * @author Stan Bailes
068: */
069: public class NonUniqueIndexConstraint extends IndexConstraint implements
070: Externalizable {
071: public NonUniqueIndexConstraint() {
072: }
073:
074: public NonUniqueIndexConstraint(String name) {
075: super (name);
076: }
077:
078: public NonUniqueIndexConstraint(String name, Vector names) {
079: super (name, names);
080: }
081:
082: public void readExternal(ObjectInput in) throws IOException,
083: ClassNotFoundException {
084: super .readExternal(in);
085: }
086:
087: public void writeExternal(ObjectOutput out) throws IOException {
088: super .writeExternal(out);
089: }
090:
091: public void checkInsert(Session session, Row row)
092: throws SQLException, IOException {
093: }
094:
095: public byte[] makeKey(Session session, Row row, long rowId)
096: throws SQLException {
097: byte[] key = Key.makeKey(table, row, getColumns(), rowId, true);
098: return key;
099: }
100:
101: public boolean isUnique() {
102: return false;
103: }
104:
105: public int getIndexColumnCount() {
106: return getColumnCount() + 1;
107: }
108:
109: public String toString() {
110: return "NonUniqueIndexConstraint: " + super .toString();
111: }
112:
113: public String constraintType() {
114: return "non-unique index";
115: }
116: }
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