Source Code Cross Referenced for Driver_MySQL.java in  » RSS-RDF » Jena-2.5.5 » com » hp » hpl » jena » db » impl » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » RSS RDF » Jena 2.5.5 » com.hp.hpl.jena.db.impl 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        /*
002:         *  (c) Copyright 2002, 2003, 2004, 2005, 2006, 2007, 2008 Hewlett-Packard Development Company, LP
003:         *  All rights reserved.
004:         *
005:         *
006:         */
007:
008:        package com.hp.hpl.jena.db.impl;
009:
010:        import java.sql.PreparedStatement;
011:        import java.sql.ResultSet;
012:        import java.sql.SQLException;
013:
014:        import com.hp.hpl.jena.db.*;
015:
016:        /**
017:         * @author hkuno based on code by Dave Reynolds
018:         *
019:         * Extends DriverRDB with MySQL-specific parameters.
020:         */
021:        public class Driver_MySQL extends DriverRDB {
022:
023:            /** The name of the database type this driver supports */
024:
025:            /** 
026:             * Constructor
027:             */
028:            public Driver_MySQL() {
029:                super ();
030:
031:                String myPackageName = this .getClass().getPackage().getName();
032:
033:                DATABASE_TYPE = "MySQL";
034:                DRIVER_NAME = "com.mysql.jdbc.Driver";
035:
036:                ID_SQL_TYPE = "INTEGER";
037:                URI_COMPRESS = false;
038:                INDEX_KEY_LENGTH_MAX = INDEX_KEY_LENGTH = 100;
039:                LONG_OBJECT_LENGTH_MAX = LONG_OBJECT_LENGTH = 100;
040:                TABLE_NAME_LENGTH_MAX = 64;
041:                IS_XACT_DB = true;
042:                PRE_ALLOCATE_ID = false;
043:                SKIP_DUPLICATE_CHECK = false;
044:                SQL_FILE = "etc/mysql.sql";
045:                DB_NAMES_TO_UPPER = false;
046:                setTableNames(TABLE_NAME_PREFIX);
047:                QUOTE_CHAR = '\'';
048:
049:                m_psetClassName = myPackageName + ".PSet_TripleStore_RDB";
050:                m_psetReifierClassName = myPackageName + ".PSet_ReifStore_RDB";
051:
052:                m_lsetClassName = myPackageName
053:                        + ".SpecializedGraph_TripleStore_RDB";
054:                m_lsetReifierClassName = myPackageName
055:                        + ".SpecializedGraphReifier_RDB";
056:            }
057:
058:            /**
059:             * Set the database connection
060:             */
061:            public void setConnection(IDBConnection dbcon) {
062:                m_dbcon = dbcon;
063:
064:                try {
065:                    // Properties defaultSQL = SQLCache.loadSQLFile(DEFAULT_SQL_FILE, null, ID_SQL_TYPE);
066:                    // m_sql = new SQLCache(SQL_FILE, defaultSQL, dbcon, ID_SQL_TYPE);
067:                    m_sql = new SQLCache(SQL_FILE, null, dbcon, ID_SQL_TYPE);
068:                } catch (Exception e) {
069:                    e.printStackTrace(System.err);
070:                    logger.error("Unable to set connection for Driver:", e);
071:                }
072:            }
073:
074:            /**
075:             * Allocate an identifier for a new graph.
076:             *
077:             */
078:            public int graphIdAlloc(String graphName) {
079:                DBIDInt result = null;
080:                int dbid = 0;
081:                try {
082:                    PreparedStatement ps = m_sql.getPreparedSQLStatement(
083:                            "insertGraph", GRAPH_TABLE);
084:                    ps.setString(1, graphName);
085:                    ps.executeUpdate();
086:                    dbid = getInsertID(GRAPH_TABLE);
087:                } catch (SQLException e) {
088:                    throw new RDFRDBException(
089:                            "Failed to get last inserted ID: " + e);
090:                }
091:                return dbid;
092:            }
093:
094:            /**
095:             * Dellocate an identifier for a graph.
096:             *
097:             */
098:            public void graphIdDealloc(int graphId) {
099:                DBIDInt result = null;
100:                try {
101:                    PreparedStatement ps = m_sql.getPreparedSQLStatement(
102:                            "deleteGraph", GRAPH_TABLE);
103:                    ps.setInt(1, graphId);
104:                    ps.executeUpdate();
105:                } catch (SQLException e) {
106:                    throw new RDFRDBException("Failed to delete graph ID: " + e);
107:                }
108:                return;
109:            }
110:
111:            public int getInsertID(String tableName) {
112:                DBIDInt result = null;
113:                PreparedStatement ps = null;
114:                try {
115:                    ps = m_sql.getPreparedSQLStatement("getInsertID");
116:                    ResultSet rs = ps.executeQuery();
117:                    if (rs.next()) {
118:                        result = wrapDBID(rs.getObject(1));
119:                    } else
120:                        throw new RDFRDBException("No last insert ID");
121:                } catch (SQLException e) {
122:                    throw new RDFRDBException(
123:                            "Failed to get last inserted ID: " + e);
124:                } finally {
125:                    if (ps != null)
126:                        m_sql.returnPreparedSQLStatement(ps);
127:                }
128:                return result.getIntID();
129:            }
130:
131:            /**
132:             * Return the parameters for table creation.
133:             * 1) column type for subj, prop, obj.
134:             * 2) table implementation type.
135:             * 3) index key length for subj, pred, obj.
136:             * 4) column type for head.
137:             * 5) index key length for head.
138:             * 6) table and index name prefix.
139:             * @param param array to hold table creation parameters. 
140:             */
141:            protected void getTblParams(String[] param) {
142:                String objColType;
143:                String tblImpl;
144:                String spoKeyLen;
145:                String headKeyLen;
146:                String headColType;
147:
148:                spoKeyLen = Integer.toString(LONG_OBJECT_LENGTH);
149:                headKeyLen = Integer.toString(INDEX_KEY_LENGTH);
150:
151:                if (INDEX_KEY_LENGTH > 250)
152:                    throw new RDFRDBException("Key length specified ("
153:                            + INDEX_KEY_LENGTH
154:                            + ") exceeds MySQL maximum key length of 250.");
155:                tblImpl = IS_XACT_DB ? "INNODB" : "MyISAM";
156:                if (IS_XACT_DB) {
157:                    if (LONG_OBJECT_LENGTH > 250)
158:                        throw new RDFRDBException(
159:                                "Long object length specified ("
160:                                        + LONG_OBJECT_LENGTH
161:                                        + ") exceeds MySQL maximum VARCHAR length of 250.");
162:
163:                    objColType = "VARCHAR(" + LONG_OBJECT_LENGTH + ") BINARY";
164:                    STRINGS_TRIMMED = true;
165:                    EOS = ":";
166:                } else {
167:                    objColType = LONG_OBJECT_LENGTH <= 250 ? "TINYBLOB"
168:                            : "MEDIUMBLOB";
169:                    STRINGS_TRIMMED = false;
170:                    EOS = "";
171:                }
172:                if (IS_XACT_DB) {
173:                    if (INDEX_KEY_LENGTH > 250)
174:                        throw new RDFRDBException(
175:                                "Index key length specified ("
176:                                        + INDEX_KEY_LENGTH
177:                                        + ") exceeds MySQL maximum VARCHAR length of 250.");
178:
179:                    headColType = "VARCHAR(" + INDEX_KEY_LENGTH + ") BINARY";
180:                } else {
181:                    headColType = INDEX_KEY_LENGTH <= 250 ? "TINYBLOB"
182:                            : "MEDIUMBLOB";
183:                }
184:
185:                param[0] = objColType;
186:                param[1] = tblImpl;
187:                param[2] = spoKeyLen;
188:                param[3] = headColType;
189:                param[4] = headKeyLen;
190:                param[5] = TABLE_NAME_PREFIX;
191:            }
192:
193:            /**
194:             * 
195:             * Return the parameters for database initialization.
196:             */
197:            protected String[] getDbInitTablesParams() {
198:                String[] res = new String[6];
199:
200:                getTblParams(res);
201:                if (IS_XACT_DB) {
202:                    STRINGS_TRIMMED = true;
203:                    EOS = ":";
204:                } else {
205:                    STRINGS_TRIMMED = false;
206:                    EOS = "";
207:                }
208:                EOS_LEN = EOS.length();
209:
210:                return res;
211:            }
212:
213:            /**
214:             * 
215:             * Return the parameters for table creation.
216:             * Generate the table name by counting the number of existing
217:             * tables for the graph. This is not reliable if another client
218:             * is concurrently trying to create a table so, if failure, we
219:             * make several attempts to create the table.
220:             */
221:
222:            protected String[] getCreateTableParams(int graphId, boolean isReif) {
223:                String[] parms = new String[6];
224:                String[] res = new String[4];
225:
226:                getTblParams(parms);
227:                int tblCnt = getTableCount(graphId);
228:                res[0] = genTableName(graphId, tblCnt, isReif);
229:                res[1] = parms[0];
230:                res[2] = parms[1];
231:                res[3] = parms[2];
232:                return res;
233:            }
234:
235:            public String genSQLStringMatchLHS_IC(String var) {
236:                return "cast(" + var + " as char)";
237:            }
238:
239:        }
240:
241:        /*
242:         *  (c) Copyright 2002, 2003, 2004, 2005, 2006, 2007, 2008 Hewlett-Packard Development Company, LP
243:         *  All rights reserved.
244:         *
245:         * Redistribution and use in source and binary forms, with or without
246:         * modification, are permitted provided that the following conditions
247:         * are met:
248:         * 1. Redistributions of source code must retain the above copyright
249:         *    notice, this list of conditions and the following disclaimer.
250:         * 2. Redistributions in binary form must reproduce the above copyright
251:         *    notice, this list of conditions and the following disclaimer in the
252:         *    documentation and/or other materials provided with the distribution.
253:         * 3. The name of the author may not be used to endorse or promote products
254:         *    derived from this software without specific prior written permission.
255:
256:         * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
257:         * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
258:         * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
259:         * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
260:         * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
261:         * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
262:         * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
263:         * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
264:         * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
265:         * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
266:         */
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