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.Externalizable;
042: import java.io.IOException;
043: import java.io.ObjectInput;
044: import java.io.ObjectOutput;
045:
046: import java.util.Vector;
047:
048: import java.sql.SQLException;
049:
050: import com.quadcap.sql.types.Value;
051:
052: /**
053: * A row containing a cross-join, all columns from each of two cursors.
054: *
055: * @author Stan Bailes
056: */
057: public class JoinCrossRow extends Row {
058: Row a;
059: Row b;
060: int aSize;
061: int size;
062:
063: public JoinCrossRow(Row a, Row b) {
064: this .a = a;
065: this .aSize = a.size();
066: this .b = b;
067: this .size = aSize + b.size();
068: }
069:
070: public final void setA(Row a) {
071: this .a = a;
072: }
073:
074: public final void setB(Row b) {
075: this .b = b;
076: }
077:
078: public final Row getA() {
079: return a;
080: }
081:
082: public final Row getB() {
083: return b;
084: }
085:
086: public final int size() {
087: return a.size() + b.size();
088: }
089:
090: public final Value item(int i) throws SQLException {
091: if (i < 1 || i > size) {
092: throw new SQLException("bad column: " + i, "42000");
093: }
094: if (i <= aSize)
095: return a.item(i);
096: return b.item(i - aSize);
097: }
098:
099: public final void set(int i, Value val) throws SQLException {
100: if (i < 1 || i > size) {
101: throw new SQLException("bad column: " + i, "42000");
102: }
103: if (i <= aSize)
104: a.set(i, val);
105: else
106: b.set(i - aSize, val);
107: }
108: }
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