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1 /*** 2 Cache - Load data from source tables (or select statements) and puts them into 3 Hatshtable (cache). 4 5 Copyright (C) 2002-2003 Together 6 7 This library is free software; you can redistribute it and/or 8 modify it under the terms of the GNU Lesser General Public 9 License as published by the Free Software Foundation; either 10 version 2.1 of the License, or (at your option) any later version. 11 12 This library is distributed in the hope that it will be useful, 13 but WITHOUT ANY WARRANTY; without even the implied warranty of 14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 15 Lesser General Public License for more details. 16 17 You should have received a copy of the GNU Lesser General Public 18 License along with this library; if not, write to the Free Software 19 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 20 21 Cache.java 22 Date: 23.01.2003. 23 @version 1.0.0 24 @author: Milosevic Sinisa sinisa@prozone.co.yu 25 */ 26 27 package org.webdocwf.util.loader; 28 29 30 import java.util.Hashtable; 31 import java.util.Vector; 32 import java.math.BigDecimal; 33 34 /*** 35 Cache - Load data from source tables (or select statements) and puts them into 36 Hatshtable (cache). 37 */ 38 public class Cache { 39 40 private Hashtable hCache=null; 41 42 /*** 43 * Public constructor of cache class. 44 * Constructor create new hashtable 45 */ 46 public Cache() { 47 this.hCache=new Hashtable(); 48 } 49 50 /*** 51 * Public constructor of cache class. 52 * Constructor set cache table. 53 * @param cache is cache table. 54 */ 55 public Cache(Hashtable cache) { 56 this.hCache=cache; 57 } 58 59 /*** 60 * Read current cache table 61 * @return value of parmeter hCache 62 */ 63 public Hashtable getCache() { 64 return this.hCache; 65 } 66 67 /*** 68 * Set cache table. 69 * @param cache is cache table 70 */ 71 public void setCache(Hashtable cache) { 72 this.hCache=cache; 73 } 74 75 /*** 76 * Put row of source values into cache. 77 * @param row SQL query row 78 * @param sourceValues represents source values 79 */ 80 public void setCacheRow(BigDecimal row, Vector sourceValues) { 81 this.hCache.put(row,sourceValues); 82 } 83 84 /*** 85 * Put row of source values into cache. 86 * @param cache is cache table 87 * @param row is SQL query row 88 * @param sourceValues represents source values 89 */ 90 public void setCacheRow(Hashtable cache, BigDecimal row, Vector sourceValues) { 91 cache.put(row,sourceValues); 92 } 93 94 /*** 95 * Read row of source values. 96 * @param row is SQL query row. 97 * @return Vector values of source columns. 98 */ 99 public Vector getCacheRow(BigDecimal row) { 100 if(this.hCache.isEmpty()) 101 return null; 102 else 103 return (Vector)this.hCache.get(row); 104 } 105 106 /*** 107 * Read row of source values. 108 * @param row is SQL query row. 109 * @param cache is cache table 110 * @return Vector values of source columns. 111 */ 112 public Vector getCacheRow(Hashtable cache, BigDecimal row) { 113 if(cache.isEmpty()) 114 return null; 115 else 116 return (Vector)cache.get(row); 117 } 118 119 /*** 120 * Reset cache. 121 */ 122 public void resetCache() { 123 this.hCache.clear(); 124 this.hCache=new Hashtable(); 125 } 126 127 }

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