001: /*
002: * $Id: TableIdentifier.java,v 1.13 2005/12/23 01:32:24 ahimanikya Exp $
003: * =======================================================================
004: * Copyright (c) 2002-2006 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;
042:
043: import java.io.Serializable;
044:
045: /**
046: * An identifier for a table.
047: *
048: * @version $Revision: 1.13 $ $Date: 2005/12/23 01:32:24 $
049: * @author Rodney Waldhoff
050: * @author Chuck Burdick
051: * @author Ahimanikya Satapathy
052: */
053: public class TableIdentifier implements Serializable {
054: public TableIdentifier() {
055: }
056:
057: public TableIdentifier(String tablename) {
058: _tableName = tablename;
059: }
060:
061: public TableIdentifier(String tablename, String tablealias) {
062: _tableName = tablename;
063: _tableAlias = tablealias;
064: }
065:
066: public boolean equals(Object otherobject) {
067: if (this == otherobject) {
068: return true;
069: }
070:
071: if (otherobject instanceof TableIdentifier) {
072: TableIdentifier that = (TableIdentifier) otherobject;
073: return ((null == _tableName ? null == that._tableName
074: : _tableName.equals(that._tableName)) && (null == _tableAlias ? null == that._tableAlias
075: : _tableAlias.equals(that._tableAlias)));
076: }
077: return false;
078: }
079:
080: public TableIdentifier getCanonicalIdentifier() {
081: return new TableIdentifier(_tableName);
082: }
083:
084: public String getTableAlias() {
085: return _tableAlias;
086: }
087:
088: public String getTableName() {
089: return _tableName;
090: }
091:
092: public int hashCode() {
093: int hashCode = _hash;
094: if (hashCode == 0) {
095: if (null != _tableName) {
096: hashCode = _tableName.hashCode();
097: }
098: if (null != _tableAlias) {
099: hashCode ^= _tableAlias.hashCode() << 4;
100: }
101: _hash = hashCode;
102: }
103: return hashCode;
104: }
105:
106: public String toString() {
107: StringBuffer result = new StringBuffer();
108: result.append(_tableName);
109: if (_tableAlias != null) {
110: result.append(" AS ");
111: result.append(_tableAlias);
112: }
113: return result.toString();
114: }
115:
116: private int _hash;
117: private String _tableAlias;
118: private String _tableName;
119:
120: private static final long serialVersionUID = 8863469319713738756L;
121: }
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