| 1 | /* ============================================================= |
| 2 | * SmallSQL : a free Java DBMS library for the Java(tm) platform |
| 3 | * ============================================================= |
| 4 | * |
| 5 | * (C) Copyright 2004-2006, by Volker Berlin. |
| 6 | * |
| 7 | * Project Info: http://www.smallsql.de/ |
| 8 | * |
| 9 | * This library is free software; you can redistribute it and/or modify it |
| 10 | * under the terms of the GNU Lesser General Public License as published by |
| 11 | * the Free Software Foundation; either version 2.1 of the License, or |
| 12 | * (at your option) any later version. |
| 13 | * |
| 14 | * This library is distributed in the hope that it will be useful, but |
| 15 | * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY |
| 16 | * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public |
| 17 | * License for more details. |
| 18 | * |
| 19 | * You should have received a copy of the GNU Lesser General Public |
| 20 | * License along with this library; if not, write to the Free Software |
| 21 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, |
| 22 | * USA. |
| 23 | * |
| 24 | * [Java is a trademark or registered trademark of Sun Microsystems, Inc. |
| 25 | * in the United States and other countries.] |
| 26 | * |
| 27 | * --------------- |
| 28 | * ExpressionFunctionTimestampAdd.java |
| 29 | * --------------- |
| 30 | * Author: Volker Berlin |
| 31 | * |
| 32 | * Created on 19.06.2004 |
| 33 | */ |
| 34 | package smallsql.database; |
| 35 | |
| 36 | |
| 37 | /** |
| 38 | * @author Volker Berlin |
| 39 | */ |
| 40 | public class ExpressionFunctionTimestampAdd extends ExpressionFunction { |
| 41 | |
| 42 | final private int interval; |
| 43 | |
| 44 | |
| 45 | ExpressionFunctionTimestampAdd(int intervalType, Expression p1, Expression p2){ |
| 46 | interval = ExpressionFunctionTimestampDiff.mapIntervalType( intervalType ); |
| 47 | setParams( new Expression[]{p1,p2}); |
| 48 | } |
| 49 | |
| 50 | |
| 51 | int getFunction() { |
| 52 | return SQLTokenizer.TIMESTAMPADD; |
| 53 | } |
| 54 | |
| 55 | |
| 56 | boolean isNull() throws Exception { |
| 57 | return param1.isNull() || param2.isNull(); |
| 58 | } |
| 59 | |
| 60 | |
| 61 | boolean getBoolean() throws Exception { |
| 62 | return getLong() != 0; |
| 63 | } |
| 64 | |
| 65 | |
| 66 | int getInt() throws Exception { |
| 67 | return (int)getLong(); |
| 68 | } |
| 69 | |
| 70 | |
| 71 | long getLong() throws Exception { |
| 72 | if(isNull()) return 0; |
| 73 | switch(interval){ |
| 74 | case SQLTokenizer.SQL_TSI_FRAC_SECOND: |
| 75 | return param2.getLong() + param1.getLong(); |
| 76 | case SQLTokenizer.SQL_TSI_SECOND: |
| 77 | return param2.getLong() + param1.getLong() * 1000; |
| 78 | case SQLTokenizer.SQL_TSI_MINUTE: |
| 79 | return param2.getLong() + param1.getLong() * 60000; |
| 80 | case SQLTokenizer.SQL_TSI_HOUR: |
| 81 | return param2.getLong() + param1.getLong() * 3600000; |
| 82 | case SQLTokenizer.SQL_TSI_DAY: |
| 83 | return param2.getLong() + param1.getLong() * 86400000; |
| 84 | case SQLTokenizer.SQL_TSI_WEEK:{ |
| 85 | return param2.getLong() + param1.getLong() * 604800000; |
| 86 | }case SQLTokenizer.SQL_TSI_MONTH:{ |
| 87 | DateTime.Details details2 = new DateTime.Details(param2.getLong()); |
| 88 | details2.month += param1.getLong(); |
| 89 | return DateTime.calcMillis(details2); |
| 90 | } |
| 91 | case SQLTokenizer.SQL_TSI_QUARTER:{ |
| 92 | DateTime.Details details2 = new DateTime.Details(param2.getLong()); |
| 93 | details2.month += param1.getLong() * 3; |
| 94 | return DateTime.calcMillis(details2); |
| 95 | } |
| 96 | case SQLTokenizer.SQL_TSI_YEAR:{ |
| 97 | DateTime.Details details2 = new DateTime.Details(param2.getLong()); |
| 98 | details2.year += param1.getLong(); |
| 99 | return DateTime.calcMillis(details2); |
| 100 | } |
| 101 | default: throw new Error(); |
| 102 | } |
| 103 | // TODO Auto-generated method stub |
| 104 | } |
| 105 | |
| 106 | |
| 107 | float getFloat() throws Exception { |
| 108 | return getLong(); |
| 109 | } |
| 110 | |
| 111 | |
| 112 | double getDouble() throws Exception { |
| 113 | return getLong(); |
| 114 | } |
| 115 | |
| 116 | |
| 117 | long getMoney() throws Exception { |
| 118 | return getLong() * 10000; |
| 119 | } |
| 120 | |
| 121 | |
| 122 | MutableNumeric getNumeric() throws Exception { |
| 123 | if(isNull()) return null; |
| 124 | return new MutableNumeric(getLong()); |
| 125 | } |
| 126 | |
| 127 | |
| 128 | Object getObject() throws Exception { |
| 129 | if(isNull()) return null; |
| 130 | return new DateTime( getLong(), SQLTokenizer.TIMESTAMP ); |
| 131 | } |
| 132 | |
| 133 | |
| 134 | String getString() throws Exception { |
| 135 | if(isNull()) return null; |
| 136 | return new DateTime( getLong(), SQLTokenizer.TIMESTAMP ).toString(); |
| 137 | } |
| 138 | |
| 139 | |
| 140 | int getDataType() { |
| 141 | return SQLTokenizer.TIMESTAMP; |
| 142 | } |
| 143 | |
| 144 | } |