001: /*
002: * $Id: JoinedRow.java,v 1.5 2005/12/22 09:02:30 ahimanikya Exp $
003: * =======================================================================
004: * Copyright (c) 2002 Axion Development Team. All rights reserved.
005: *
006: * Redistribution and use in source and binary forms, with or without
007: * modification, are permitted provided that the following conditions
008: * are met:
009: *
010: * 1. Redistributions of source code must retain the above
011: * copyright notice, this list of conditions and the following
012: * disclaimer.
013: *
014: * 2. Redistributions in binary form must reproduce the above copyright
015: * notice, this list of conditions and the following disclaimer in
016: * the documentation and/or other materials provided with the
017: * distribution.
018: *
019: * 3. The names "Tigris", "Axion", nor the names of its contributors may
020: * not be used to endorse or promote products derived from this
021: * software without specific prior written permission.
022: *
023: * 4. Products derived from this software may not be called "Axion", nor
024: * may "Tigris" or "Axion" appear in their names without specific prior
025: * written permission.
026: *
027: * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
028: * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
029: * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
030: * PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
031: * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
032: * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
033: * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
034: * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
035: * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
036: * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
037: * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
038: * =======================================================================
039: */
040:
041: package org.axiondb.engine.rows;
042:
043: import java.util.ArrayList;
044:
045: import org.axiondb.Row;
046:
047: /**
048: * A {@link Row} composed of zero or more <code>Row</code>s, joined together
049: * end-to-end.
050: *
051: * @version $Revision: 1.5 $ $Date: 2005/12/22 09:02:30 $
052: * @author Rodney Waldhoff
053: * @author Ahimanikya Satapathy
054: */
055: public class JoinedRow extends BaseRow {
056: public JoinedRow() {
057: _rows = new ArrayList(2);
058: }
059:
060: public void addRow(Row row) {
061: _size += row.size();
062: _rows.add(row);
063: _hash = 0;
064: }
065:
066: public Object get(int i) {
067: int n = i;
068: for (int j = 0, J = _rows.size(); j < J; j++) {
069: Row row = (Row) (_rows.get(j));
070: int size = row.size();
071: if (n < size) {
072: return row.get(n);
073: }
074: n -= size;
075: }
076: throw new IndexOutOfBoundsException(i + " >= " + size());
077: }
078:
079: public void set(int i, Object val) {
080: int n = i;
081: for (int j = 0, J = _rows.size(); j < J; j++) {
082: Row row = (Row) (_rows.get(j));
083: int size = row.size();
084: if (n < size) {
085: row.set(n, val);
086: _hash = 0;
087: return;
088: }
089: n -= size;
090: }
091: throw new IndexOutOfBoundsException(i + " >= " + size());
092: }
093:
094: public final int size() {
095: return _size;
096: }
097:
098: // if LOJ left row iter index is "0" and right row iter index is "1"
099: // if ROJ left row iter index is "1" and right row iter index ia "0"
100: public Row getRow(int i) {
101: return (Row) _rows.get(i);
102: }
103:
104: private ArrayList _rows;
105: private int _size = 0;
106: }
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