| 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 | * ExpressionFunctionReturnP1Number.java |
| 29 | * --------------- |
| 30 | * Author: Volker Berlin |
| 31 | * |
| 32 | * Created on 03.10.2005 |
| 33 | */ |
| 34 | package smallsql.database; |
| 35 | |
| 36 | abstract class ExpressionFunctionReturnP1Number extends ExpressionFunctionReturnP1 { |
| 37 | |
| 38 | |
| 39 | final boolean getBoolean() throws Exception{ |
| 40 | return getDouble() != 0; |
| 41 | } |
| 42 | |
| 43 | |
| 44 | final int getInt() throws Exception { |
| 45 | return Utils.long2int(getLong()); |
| 46 | } |
| 47 | |
| 48 | |
| 49 | final long getLong() throws Exception{ |
| 50 | return Utils.double2long(getDouble()); |
| 51 | } |
| 52 | |
| 53 | |
| 54 | final float getFloat() throws Exception { |
| 55 | return (float)getDouble(); |
| 56 | } |
| 57 | |
| 58 | |
| 59 | MutableNumeric getNumeric() throws Exception{ |
| 60 | if(param1.isNull()) return null; |
| 61 | switch(getDataType()){ |
| 62 | case SQLTokenizer.INT: |
| 63 | return new MutableNumeric(getInt()); |
| 64 | case SQLTokenizer.BIGINT: |
| 65 | return new MutableNumeric(getLong()); |
| 66 | case SQLTokenizer.MONEY: |
| 67 | return new MutableNumeric(getMoney(), 4); |
| 68 | case SQLTokenizer.DECIMAL: |
| 69 | MutableNumeric num = param1.getNumeric(); |
| 70 | num.floor(); |
| 71 | return num; |
| 72 | case SQLTokenizer.DOUBLE: |
| 73 | return new MutableNumeric(getDouble()); |
| 74 | default: |
| 75 | throw new Error(); |
| 76 | } |
| 77 | } |
| 78 | |
| 79 | |
| 80 | long getMoney() throws Exception{ |
| 81 | return Utils.doubleToMoney(getDouble()); |
| 82 | } |
| 83 | |
| 84 | |
| 85 | String getString() throws Exception { |
| 86 | if(isNull()) return null; |
| 87 | return getObject().toString(); |
| 88 | } |
| 89 | |
| 90 | |
| 91 | final int getDataType() { |
| 92 | return ExpressionArithmetic.getBestNumberDataType(param1.getDataType()); |
| 93 | } |
| 94 | |
| 95 | |
| 96 | |
| 97 | |
| 98 | } |