Source Code Cross Referenced for MetaAttribute.java in  » Groupware » hipergate » com » knowgate » hipergate » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » Groupware » hipergate » com.knowgate.hipergate 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        /*
002:          Copyright (C) 2003  Know Gate S.L. All rights reserved.
003:                              C/Oņa, 107 1š2 28050 Madrid (Spain)
004:
005:          Redistribution and use in source and binary forms, with or without
006:          modification, are permitted provided that the following conditions
007:          are met:
008:
009:          1. Redistributions of source code must retain the above copyright
010:             notice, this list of conditions and the following disclaimer.
011:
012:          2. The end-user documentation included with the redistribution,
013:             if any, must include the following acknowledgment:
014:             "This product includes software parts from hipergate
015:             (http://www.hipergate.org/)."
016:             Alternately, this acknowledgment may appear in the software itself,
017:             if and wherever such third-party acknowledgments normally appear.
018:
019:          3. The name hipergate must not be used to endorse or promote products
020:             derived from this software without prior written permission.
021:             Products derived from this software may not be called hipergate,
022:             nor may hipergate appear in their name, without prior written
023:             permission.
024:
025:          This library is distributed in the hope that it will be useful,
026:          but WITHOUT ANY WARRANTY; without even the implied warranty of
027:          MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
028:
029:          You should have received a copy of hipergate License with this code;
030:          if not, visit http://www.hipergate.org or mail to info@hipergate.org
031:         */
032:
033:        package com.knowgate.hipergate;
034:
035:        import java.sql.SQLException;
036:        import java.sql.PreparedStatement;
037:        import java.sql.ResultSet;
038:        import java.sql.ResultSetMetaData;
039:
040:        import com.knowgate.debug.DebugFile;
041:        import com.knowgate.jdc.JDCConnection;
042:        import com.knowgate.dataobjs.DB;
043:        import com.knowgate.dataobjs.DBPersist;
044:        import com.knowgate.misc.Gadgets;
045:
046:        /**
047:         * <p>Table Meta-Attributes</p>
048:         * Meta-Attributes are "virtual columns" that may exists for each table on a per
049:         * WorkArea basis. This class holds only the meta-attribuyes definitions, not the
050:         * actual data contained on them.
051:         * @author Sergio Montoro Ten
052:         * @version 2.1
053:         */
054:        public class MetaAttribute extends DBPersist {
055:
056:            /**
057:             * Create empty Meta-Attribute
058:             */
059:            public MetaAttribute() {
060:                super (DB.k_lu_meta_attrs, "MetaAttribute");
061:            }
062:
063:            /**
064:             * Load Meta-Attribute from database.
065:             * @param oConn Database Connection
066:             * @param sOwnerGUID GUID of WorkArea to witch the Meta-Attribute belongs.
067:             * @param sTableName Name of base table
068:             * @param sSectionName Section Name (emulates a column name on base table).
069:             * @throws SQLException
070:             */
071:            public MetaAttribute(JDCConnection oConn, String sOwnerGUID,
072:                    String sTableName, String sSectionName) throws SQLException {
073:                super (DB.k_lu_meta_attrs, "MetaAttribute");
074:                PreparedStatement oStmt = oConn
075:                        .prepareStatement("SELECT * FROM " + DB.k_lu_meta_attrs
076:                                + " WHERE " + DB.gu_owner + "=? AND "
077:                                + DB.nm_table + "=? AND " + DB.id_section
078:                                + "=?", ResultSet.TYPE_FORWARD_ONLY,
079:                                ResultSet.CONCUR_READ_ONLY);
080:                oStmt.setString(1, sOwnerGUID);
081:                oStmt.setString(2, sTableName);
082:                oStmt.setString(3, sSectionName);
083:                ResultSet oRSet = oStmt.executeQuery();
084:                boolean bFound = oRSet.next();
085:                if (bFound) {
086:                    ResultSetMetaData oMDat = oRSet.getMetaData();
087:                    int iColCount = oMDat.getColumnCount();
088:                    for (int c = 1; c <= iColCount; c++) {
089:                        put(oMDat.getColumnName(c).toLowerCase(), oRSet
090:                                .getObject(c));
091:                    } // next
092:                    oRSet.close();
093:                    oStmt.close();
094:                } else {
095:                    oRSet.close();
096:                    oStmt.close();
097:                    throw new SQLException(DB.k_lu_meta_attrs
098:                            + " No data found for " + sTableName + "."
099:                            + sSectionName + " at WorkArea " + sOwnerGUID,
100:                            "42S02", 100);
101:                }
102:            }
103:
104:            // ----------------------------------------------------------
105:
106:            /**
107:             * Delete meta-Attribute definition and data.
108:             * @param oConn Database Connection
109:             * @throws SQLException
110:             * @throws NullPointerException If base table, workarea or attribute is <b>null</b>
111:             */
112:            public boolean delete(JDCConnection oConn) throws SQLException,
113:                    NullPointerException {
114:                PreparedStatement oStmt;
115:                boolean bRetVal;
116:
117:                if (DebugFile.trace) {
118:                    DebugFile
119:                            .writeln("Begin MetaAttribute.delete([Connection])");
120:                }
121:
122:                if (isNull(DB.nm_table))
123:                    throw new NullPointerException(
124:                            "Base table for meta-attribute not set");
125:                if (isNull(DB.gu_owner))
126:                    throw new NullPointerException(
127:                            "Owner WorkArea for meta-attribute not set");
128:                if (isNull(DB.id_section))
129:                    throw new NullPointerException(
130:                            "Section for meta-attribute not set");
131:
132:                if (DebugFile.trace) {
133:                    DebugFile.incIdent();
134:                    DebugFile
135:                            .writeln("Connection.prepareStatement(DELETE FROM "
136:                                    + DB.k_lu_meta_attrs + " WHERE "
137:                                    + DB.gu_owner + "='"
138:                                    + getStringNull(DB.gu_owner, "null")
139:                                    + "' AND " + DB.nm_table + "='"
140:                                    + getStringNull(DB.nm_table, "null")
141:                                    + "' AND " + DB.id_section + "='"
142:                                    + getStringNull(DB.id_section, "null")
143:                                    + "'");
144:                }
145:
146:                oStmt = oConn.prepareStatement("DELETE FROM "
147:                        + DB.k_lu_meta_attrs + " WHERE " + DB.gu_owner
148:                        + "=? AND " + DB.nm_table + "=? AND " + DB.id_section
149:                        + "=?");
150:                oStmt.setString(1, getString(DB.gu_owner));
151:                oStmt.setString(2, getString(DB.nm_table));
152:                oStmt.setString(3, getString(DB.id_section));
153:                oStmt.executeUpdate();
154:                oStmt.close();
155:
156:                bRetVal = super .delete(oConn);
157:
158:                if (DebugFile.trace) {
159:                    DebugFile.decIdent();
160:                    DebugFile.writeln("End MetaAttribute.delete() : "
161:                            + String.valueOf(bRetVal));
162:                }
163:
164:                return bRetVal;
165:            } // delete()
166:
167:            // ----------------------------------------------------------
168:
169:            /**
170:             * <p>Store Meta-Attribute Definition</p>
171:             * Field pg_attr is automatically assigned to next free value in k_lu_meta_attrs
172:             * table for current WorkArea and Base Table.
173:             * @param oConn Database Connection
174:             * @throws SQLException
175:             */
176:            public boolean store(JDCConnection oConn) throws SQLException {
177:                PreparedStatement oStmt;
178:                ResultSet oRSet;
179:                Object oMax;
180:                Integer iMax;
181:                boolean bRetVal;
182:
183:                if (DebugFile.trace) {
184:                    DebugFile.writeln("Begin MetaAttribute.stor([Connection])");
185:                    DebugFile.incIdent();
186:                    DebugFile.writeln("Connection.prepareStatement(SELECT MAX("
187:                            + DB.pg_attr + ")+1 FROM " + DB.k_lu_meta_attrs
188:                            + " WHERE " + DB.gu_owner + "='"
189:                            + getStringNull(DB.gu_owner, "") + "' AND "
190:                            + DB.nm_table + "='"
191:                            + getStringNull(DB.nm_table, "") + "')");
192:                }
193:
194:                if (!AllVals.containsKey(DB.pg_attr)) {
195:                    oStmt = oConn.prepareStatement("SELECT MAX(" + DB.pg_attr
196:                            + ")+1 FROM " + DB.k_lu_meta_attrs + " WHERE "
197:                            + DB.gu_owner + "=? AND " + DB.nm_table + "=?");
198:                    oStmt.setString(1, getString(DB.gu_owner));
199:                    oStmt.setString(2, getString(DB.nm_table));
200:                    oRSet = oStmt.executeQuery();
201:                    if (oRSet.next()) {
202:                        oMax = oRSet.getObject(1);
203:                        if (oRSet.wasNull())
204:                            iMax = new Integer(1);
205:                        else
206:                            iMax = new Integer(oMax.toString());
207:                    } else
208:                        iMax = new Integer(1);
209:                    oRSet.close();
210:                    oStmt.close();
211:
212:                    if (oConn.getDataBaseProduct() == JDCConnection.DBMS_ORACLE)
213:                        put(DB.pg_attr, new java.math.BigDecimal(iMax
214:                                .toString()));
215:                    else
216:                        put(DB.pg_attr, new Short(iMax.toString()));
217:                }
218:
219:                bRetVal = super .store(oConn);
220:
221:                if (DebugFile.trace) {
222:                    DebugFile.decIdent();
223:                    DebugFile.writeln("End MetaAttribute.store() : "
224:                            + String.valueOf(bRetVal));
225:                }
226:
227:                return bRetVal;
228:            } // store()
229:
230:            // **********************************************************
231:            // Public Constants
232:
233:            public static final short ClassId = 12;
234:        }
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