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| 1 | /* | ||
| 2 | * Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved. | ||
| 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. | ||
| 4 | * | ||
| 5 | * This code is free software; you can redistribute it and/or modify it | ||
| 6 | * under the terms of the GNU General Public License version 2 only, as | ||
| 7 | * published by the Free Software Foundation. Oracle designates this | ||
| 8 | * particular file as subject to the "Classpath" exception as provided | ||
| 9 | * by Oracle in the LICENSE file that accompanied this code. | ||
| 10 | * | ||
| 11 | * This code is distributed in the hope that it will be useful, but WITHOUT | ||
| 12 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | ||
| 13 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | ||
| 14 | * version 2 for more details (a copy is included in the LICENSE file that | ||
| 15 | * accompanied this code). | ||
| 16 | * | ||
| 17 | * You should have received a copy of the GNU General Public License version | ||
| 18 | * 2 along with this work; if not, write to the Free Software Foundation, | ||
| 19 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | ||
| 20 | * | ||
| 21 | * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA | ||
| 22 | * or visit www.oracle.com if you need additional information or have any | ||
| 23 | * questions. | ||
| 24 | */ | ||
| 25 | |||
| 26 | package com.sun.rowset; | ||
| 27 | |||
| 28 | import java.sql.*; | ||
| 29 | import javax.sql.*; | ||
| 30 | import java.io.*; | ||
| 31 | import java.math.*; | ||
| 32 | import java.util.*; | ||
| 33 | import java.text.*; | ||
| 34 | |||
| 35 | import org.xml.sax.*; | ||
| 36 | |||
| 37 | import javax.sql.rowset.*; | ||
| 38 | import javax.sql.rowset.spi.*; | ||
| 39 | |||
| 40 | import com.sun.rowset.providers.*; | ||
| 41 | import com.sun.rowset.internal.*; | ||
| 42 | |||
| 43 | /** | ||
| 44 | * The standard implementation of the <code>WebRowSet</code> interface. See the interface | ||
| 45 | * defintion for full behaviour and implementation requirements. | ||
| 46 | * | ||
| 47 | * @author Jonathan Bruce, Amit Handa | ||
| 48 | */ | ||
| 49 | public class WebRowSetImpl extends CachedRowSetImpl implements WebRowSet { | ||
| 50 | |||
| 51 | /** | ||
| 52 | * The <code>WebRowSetXmlReader</code> object that this | ||
| 53 | * <code>WebRowSet</code> object will call when the method | ||
| 54 | * <code>WebRowSet.readXml</code> is invoked. | ||
| 55 | */ | ||
| 56 | private WebRowSetXmlReader xmlReader; | ||
| 57 | |||
| 58 | /** | ||
| 59 | * The <code>WebRowSetXmlWriter</code> object that this | ||
| 60 | * <code>WebRowSet</code> object will call when the method | ||
| 61 | * <code>WebRowSet.writeXml</code> is invoked. | ||
| 62 | */ | ||
| 63 | private WebRowSetXmlWriter xmlWriter; | ||
| 64 | |||
| 65 | /* This stores the cursor position prior to calling the writeXML. | ||
| 66 | * This variable is used after the write to restore the position | ||
| 67 | * to the point where the writeXml was called. | ||
| 68 | */ | ||
| 69 | private int curPosBfrWrite; | ||
| 70 | |||
| 71 | private SyncProvider provider; | ||
| 72 | |||
| 73 | /** | ||
| 74 | * Constructs a new <code>WebRowSet</code> object initialized with the | ||
| 75 | * default values for a <code>CachedRowSet</code> object instance. This | ||
| 76 | * provides the <code>RIOptimistic</code> provider to deliver | ||
| 77 | * synchronization capabilities to relational datastores and a default | ||
| 78 | * <code>WebRowSetXmlReader</code> object and a default | ||
| 79 | * <code>WebRowSetXmlWriter</code> object to enable XML output | ||
| 80 | * capabilities. | ||
| 81 | * | ||
| 82 | * @throws SQLException if an error occurs in configuring the default | ||
| 83 | * synchronization providers for relational and XML providers. | ||
| 84 | */ | ||
| 85 | public WebRowSetImpl() throws SQLException { | ||
| 86 | super(); | ||
| 87 | |||
| 88 | // %%% | ||
| 89 | // Needs to use to SPI XmlReader,XmlWriters | ||
| 90 | // | ||
| 91 | xmlReader = new WebRowSetXmlReader(); | ||
| 92 | xmlWriter = new WebRowSetXmlWriter(); | ||
| 93 | } | ||
| 94 | |||
| 95 | /** | ||
| 96 | * Constructs a new <code>WebRowSet</code> object initialized with the the | ||
| 97 | * synchronization SPI provider properties as specified in the <code>Hashtable</code>. If | ||
| 98 | * this hashtable is empty or is <code>null</code> the default constructor is invoked. | ||
| 99 | * | ||
| 100 | * @throws SQLException if an error occurs in configuring the specified | ||
| 101 | * synchronization providers for the relational and XML providers; or | ||
| 102 | * if the Hashtanle is null | ||
| 103 | */ | ||
| 104 | public WebRowSetImpl(Hashtable env) throws SQLException { | ||
| 105 | |||
| 106 | try { | ||
| 107 | resBundle = JdbcRowSetResourceBundle.getJdbcRowSetResourceBundle(); | ||
| 108 | } catch(IOException ioe) { | ||
| 109 | throw new RuntimeException(ioe); | ||
| 110 | } | ||
| 111 | |||
| 112 | if ( env == null) { | ||
| 113 | throw new SQLException(resBundle.handleGetObject("webrowsetimpl.nullhash").toString()); | ||
| 114 | } | ||
| 115 | |||
| 116 | String providerName = | ||
| 117 | (String)env.get(javax.sql.rowset.spi.SyncFactory.ROWSET_SYNC_PROVIDER); | ||
| 118 | |||
| 119 | // set the Reader, this maybe overridden latter | ||
| 120 | provider = (SyncProvider)SyncFactory.getInstance(providerName); | ||
| 121 | |||
| 122 | // xmlReader = provider.getRowSetReader(); | ||
| 123 | // xmlWriter = provider.getRowSetWriter(); | ||
| 124 | } | ||
| 125 | |||
| 126 | /** | ||
| 127 | * Populates this <code>WebRowSet</code> object with the | ||
| 128 | * data in the given <code>ResultSet</code> object and writes itself | ||
| 129 | * to the given <code>java.io.Writer</code> object in XML format. | ||
| 130 | * This includes the rowset's data, properties, and metadata. | ||
| 131 | * | ||
| 132 | * @throws SQLException if an error occurs writing out the rowset | ||
| 133 | * contents to XML | ||
| 134 | */ | ||
| 135 | public void writeXml(ResultSet rs, java.io.Writer writer) | ||
| 136 | throws SQLException { | ||
| 137 | // WebRowSetImpl wrs = new WebRowSetImpl(); | ||
| 138 | this.populate(rs); | ||
| 139 | |||
| 140 | // Store the cursor position before writing | ||
| 141 | curPosBfrWrite = this.getRow(); | ||
| 142 | |||
| 143 | this.writeXml(writer); | ||
| 144 | } | ||
| 145 | |||
| 146 | /** | ||
| 147 | * Writes this <code>WebRowSet</code> object to the given | ||
| 148 | * <code>java.io.Writer</code> object in XML format. This | ||
| 149 | * includes the rowset's data, properties, and metadata. | ||
| 150 | * | ||
| 151 | * @throws SQLException if an error occurs writing out the rowset | ||
| 152 | * contents to XML | ||
| 153 | */ | ||
| 154 | public void writeXml(java.io.Writer writer) throws SQLException { | ||
| 155 | // %%% | ||
| 156 | // This will change to a XmlReader, which over-rides the default | ||
| 157 | // Xml that is used when a WRS is instantiated. | ||
| 158 | // WebRowSetXmlWriter xmlWriter = getXmlWriter(); | ||
| 159 | if (xmlWriter != null) { | ||
| 160 | |||
| 161 | // Store the cursor position before writing | ||
| 162 | curPosBfrWrite = this.getRow(); | ||
| 163 | |||
| 164 | xmlWriter.writeXML(this, writer); | ||
| 165 | } else { | ||
| 166 | throw new SQLException(resBundle.handleGetObject("webrowsetimpl.invalidwr").toString()); | ||
| 167 | } | ||
| 168 | } | ||
| 169 | |||
| 170 | /** | ||
| 171 | * Reads this <code>WebRowSet</code> object in its XML format. | ||
| 172 | * | ||
| 173 | * @throws SQLException if a database access error occurs | ||
| 174 | */ | ||
| 175 | public void readXml(java.io.Reader reader) throws SQLException { | ||
| 176 | // %%% | ||
| 177 | // This will change to a XmlReader, which over-rides the default | ||
| 178 | // Xml that is used when a WRS is instantiated. | ||
| 179 | //WebRowSetXmlReader xmlReader = getXmlReader(); | ||
| 180 | try { | ||
| 181 | if (reader != null) { | ||
| 182 | xmlReader.readXML(this, reader); | ||
| 183 | |||
| 184 | // Position is before the first row | ||
| 185 | // The cursor position is to be stored while serializng | ||
| 186 | // and deserializing the WebRowSet Object. | ||
| 187 | if(curPosBfrWrite == 0) { | ||
| 188 | this.beforeFirst(); | ||
| 189 | } | ||
| 190 | |||
| 191 | // Return the position back to place prior to callin writeXml | ||
| 192 | else { | ||
| 193 | this.absolute(curPosBfrWrite); | ||
| 194 | } | ||
| 195 | |||
| 196 | } else { | ||
| 197 | throw new SQLException(resBundle.handleGetObject("webrowsetimpl.invalidrd").toString()); | ||
| 198 | } | ||
| 199 | } catch (Exception e) { | ||
| 200 | throw new SQLException(e.getMessage()); | ||
| 201 | } | ||
| 202 | } | ||
| 203 | |||
| 204 | // Stream based methods | ||
| 205 | /** | ||
| 206 | * Reads a stream based XML input to populate this <code>WebRowSet</code> | ||
| 207 | * object. | ||
| 208 | * | ||
| 209 | * @throws SQLException if a data source access error occurs | ||
| 210 | * @throws IOException if a IO exception occurs | ||
| 211 | */ | ||
| 212 | public void readXml(java.io.InputStream iStream) throws SQLException, IOException { | ||
| 213 | if (iStream != null) { | ||
| 214 | xmlReader.readXML(this, iStream); | ||
| 215 | |||
| 216 | // Position is before the first row | ||
| 217 | // The cursor position is to be stored while serializng | ||
| 218 | // and deserializing the WebRowSet Object. | ||
| 219 | if(curPosBfrWrite == 0) { | ||
| 220 | this.beforeFirst(); | ||
| 221 | } | ||
| 222 | |||
| 223 | // Return the position back to place prior to callin writeXml | ||
| 224 | else { | ||
| 225 | this.absolute(curPosBfrWrite); | ||
| 226 | } | ||
| 227 | |||
| 228 | } else { | ||
| 229 | throw new SQLException(resBundle.handleGetObject("webrowsetimpl.invalidrd").toString()); | ||
| 230 | } | ||
| 231 | } | ||
| 232 | |||
| 233 | /** | ||
| 234 | * Writes this <code>WebRowSet</code> object to the given <code> OutputStream</code> | ||
| 235 | * object in XML format. | ||
| 236 | * Creates an an output stream of the internal state and contents of a | ||
| 237 | * <code>WebRowSet</code> for XML proceessing | ||
| 238 | * | ||
| 239 | * @throws SQLException if a datasource access error occurs | ||
| 240 | * @throws IOException if an IO exception occurs | ||
| 241 | */ | ||
| 242 | public void writeXml(java.io.OutputStream oStream) throws SQLException, IOException { | ||
| 243 | if (xmlWriter != null) { | ||
| 244 | |||
| 245 | // Store the cursor position before writing | ||
| 246 | curPosBfrWrite = this.getRow(); | ||
| 247 | |||
| 248 | xmlWriter.writeXML(this, oStream); | ||
| 249 | } else { | ||
| 250 | throw new SQLException(resBundle.handleGetObject("webrowsetimpl.invalidwr").toString()); | ||
| 251 | } | ||
| 252 | |||
| 253 | } | ||
| 254 | |||
| 255 | /** | ||
| 256 | * Populates this <code>WebRowSet</code> object with the | ||
| 257 | * data in the given <code>ResultSet</code> object and writes itself | ||
| 258 | * to the given <code>java.io.OutputStream</code> object in XML format. | ||
| 259 | * This includes the rowset's data, properties, and metadata. | ||
| 260 | * | ||
| 261 | * @throws SQLException if a datasource access error occurs | ||
| 262 | * @throws IOException if an IO exception occurs | ||
| 263 | */ | ||
| 264 | public void writeXml(ResultSet rs, java.io.OutputStream oStream) throws SQLException, IOException { | ||
| 265 | this.populate(rs); | ||
| 266 | |||
| 267 | // Store the cursor position before writing | ||
| 268 | curPosBfrWrite = this.getRow(); | ||
| 269 | |||
| 270 | this.writeXml(oStream); | ||
| 271 | } | ||
| 272 | |||
| 273 | /** | ||
| 274 | * This method re populates the resBundle | ||
| 275 | * during the deserialization process | ||
| 276 | * | ||
| 277 | */ | ||
| 278 | private void readObject(ObjectInputStream ois) throws IOException, ClassNotFoundException { | ||
| 279 | // Default state initialization happens here | ||
| 280 | ois.defaultReadObject(); | ||
| 281 | // Initialization of transient Res Bundle happens here . | ||
| 282 | try { | ||
| 283 | resBundle = JdbcRowSetResourceBundle.getJdbcRowSetResourceBundle(); | ||
| 284 | } catch(IOException ioe) { | ||
| 285 | throw new RuntimeException(ioe); | ||
| 286 | } | ||
| 287 | |||
| 288 | } | ||
| 289 | |||
| 290 | static final long serialVersionUID = -8771775154092422943L; | ||
| 291 | } | ||