/* * Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This code is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 only, as * published by the Free Software Foundation.  Oracle designates this * particular file as subject to the "Classpath" exception as provided * by Oracle in the LICENSE file that accompanied this code. * * This code is distributed in the hope that it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License * version 2 for more details (a copy is included in the LICENSE file that * accompanied this code). * * You should have received a copy of the GNU General Public License version * 2 along with this work; if not, write to the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. * * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA * or visit www.oracle.com if you need additional information or have any * questions. */ package com.sun.rowset; import java.sql.*;import javax.sql.*;import java.io.*;import java.math.*;import java.util.*;import java.text.*; import org.xml.sax.*; import javax.sql.rowset.*;import javax.sql.rowset.spi.*; import com.sun.rowset.providers.*;import com.sun.rowset.internal.*; /** * The standard implementation of the <code>WebRowSet</code> interface. See the interface * defintion for full behaviour and implementation requirements. * * @author Jonathan Bruce, Amit Handa */public class WebRowSetImpl extends CachedRowSetImpl implements WebRowSet {     /**     * The <code>WebRowSetXmlReader</code> object that this     * <code>WebRowSet</code> object will call when the method     * <code>WebRowSet.readXml</code> is invoked.     */    private WebRowSetXmlReader xmlReader;     /**     * The <code>WebRowSetXmlWriter</code> object that this     * <code>WebRowSet</code> object will call when the method     * <code>WebRowSet.writeXml</code> is invoked.     */    private WebRowSetXmlWriter xmlWriter;     /* This stores the cursor position prior to calling the writeXML.     * This variable is used after the write to restore the position     * to the point where the writeXml was called.     */    private int curPosBfrWrite;     private SyncProvider provider;     /**     * Constructs a new <code>WebRowSet</code> object initialized with the     * default values for a <code>CachedRowSet</code> object instance. This     * provides the <code>RIOptimistic</code> provider to deliver     * synchronization capabilities to relational datastores and a default     * <code>WebRowSetXmlReader</code> object and a default     * <code>WebRowSetXmlWriter</code> object to enable XML output     * capabilities.     *     * @throws SQLException if an error occurs in configuring the default     * synchronization providers for relational and XML providers.     */    public WebRowSetImpl() throws SQLException {        super();         // %%%        // Needs to use to SPI  XmlReader,XmlWriters        //        xmlReader = new WebRowSetXmlReader();        xmlWriter = new WebRowSetXmlWriter();    }     /**     * Constructs a new <code>WebRowSet</code> object initialized with the the     * synchronization SPI provider properties as specified in the <code>Hashtable</code>. If     * this hashtable is empty or is <code>null</code> the default constructor is invoked.     *     * @throws SQLException if an error occurs in configuring the specified     * synchronization providers for the relational and XML providers; or     * if the Hashtanle is null     */    public WebRowSetImpl(Hashtable env) throws SQLException {         try {           resBundle = JdbcRowSetResourceBundle.getJdbcRowSetResourceBundle();        } catch(IOException ioe) {            throw new RuntimeException(ioe);        }         if ( env == null) {            throw new SQLException(resBundle.handleGetObject("webrowsetimpl.nullhash").toString());        }         String providerName =            (String)env.get(javax.sql.rowset.spi.SyncFactory.ROWSET_SYNC_PROVIDER);         // set the Reader, this maybe overridden latter        provider = (SyncProvider)SyncFactory.getInstance(providerName);         // xmlReader = provider.getRowSetReader();        // xmlWriter = provider.getRowSetWriter();    }    /**    * Populates this <code>WebRowSet</code> object with the    * data in the given <code>ResultSet</code> object and writes itself    * to the given <code>java.io.Writer</code> object in XML format.    * This includes the rowset's data,  properties, and metadata.    *    * @throws SQLException if an error occurs writing out the rowset    *          contents to XML    */    public void writeXml(ResultSet rs, java.io.Writer writer)        throws SQLException {            // WebRowSetImpl wrs = new WebRowSetImpl();            this.populate(rs);             // Store the cursor position before writing            curPosBfrWrite = this.getRow();             this.writeXml(writer);    }     /**     * Writes this <code>WebRowSet</code> object to the given     * <code>java.io.Writer</code> object in XML format. This     * includes the rowset's data,  properties, and metadata.     *     * @throws SQLException if an error occurs writing out the rowset     *          contents to XML     */    public void writeXml(java.io.Writer writer) throws SQLException {        // %%%        // This will change to a XmlReader, which over-rides the default        // Xml that is used when a WRS is instantiated.        // WebRowSetXmlWriter xmlWriter = getXmlWriter();        if (xmlWriter != null) {             // Store the cursor position before writing            curPosBfrWrite = this.getRow();             xmlWriter.writeXML(this, writer);        } else {            throw new SQLException(resBundle.handleGetObject("webrowsetimpl.invalidwr").toString());        }    }     /**     * Reads this <code>WebRowSet</code> object in its XML format.     *     * @throws SQLException if a database access error occurs     */    public void readXml(java.io.Reader reader) throws SQLException {        // %%%        // This will change to a XmlReader, which over-rides the default        // Xml that is used when a WRS is instantiated.        //WebRowSetXmlReader xmlReader = getXmlReader();        try {             if (reader != null) {                xmlReader.readXML(this, reader);                 // Position is before the first row                // The cursor position is to be stored while serializng                // and deserializing the WebRowSet Object.                if(curPosBfrWrite == 0) {                   this.beforeFirst();                }                 // Return the position back to place prior to callin writeXml                else {                   this.absolute(curPosBfrWrite);                }             } else {                throw new SQLException(resBundle.handleGetObject("webrowsetimpl.invalidrd").toString());            }        } catch (Exception e) {            throw new SQLException(e.getMessage());        }    }     // Stream based methods    /**     * Reads a stream based XML input to populate this <code>WebRowSet</code>     * object.     *     * @throws SQLException if a data source access error occurs     * @throws IOException if a IO exception occurs     */    public void readXml(java.io.InputStream iStream) throws SQLException, IOException {        if (iStream != null) {            xmlReader.readXML(this, iStream);             // Position is before the first row                // The cursor position is to be stored while serializng                // and deserializing the WebRowSet Object.                if(curPosBfrWrite == 0) {                   this.beforeFirst();                }                 // Return the position back to place prior to callin writeXml                else {                   this.absolute(curPosBfrWrite);                }         } else {            throw new SQLException(resBundle.handleGetObject("webrowsetimpl.invalidrd").toString());        }    }     /**     * Writes this <code>WebRowSet</code> object to the given <code> OutputStream</code>     * object in XML format.     * Creates an an output stream of the internal state and contents of a     * <code>WebRowSet</code> for XML proceessing     *     * @throws SQLException if a datasource access error occurs     * @throws IOException if an IO exception occurs     */    public void writeXml(java.io.OutputStream oStream) throws SQLException, IOException {        if (xmlWriter != null) {             // Store the cursor position before writing            curPosBfrWrite = this.getRow();             xmlWriter.writeXML(this, oStream);        } else {            throw new SQLException(resBundle.handleGetObject("webrowsetimpl.invalidwr").toString());        }     }     /**     * Populates this <code>WebRowSet</code> object with the     * data in the given <code>ResultSet</code> object and writes itself     * to the given <code>java.io.OutputStream</code> object in XML format.     * This includes the rowset's data,  properties, and metadata.     *     * @throws SQLException if a datasource access error occurs     * @throws IOException if an IO exception occurs     */    public void writeXml(ResultSet rs, java.io.OutputStream oStream) throws SQLException, IOException {            this.populate(rs);             // Store the cursor position before writing            curPosBfrWrite = this.getRow();             this.writeXml(oStream);    }     /**     * This method re populates the resBundle     * during the deserialization process     *     */    private void readObject(ObjectInputStream ois) throws IOException, ClassNotFoundException {        // Default state initialization happens here        ois.defaultReadObject();        // Initialization of transient Res Bundle happens here .        try {           resBundle = JdbcRowSetResourceBundle.getJdbcRowSetResourceBundle();        } catch(IOException ioe) {            throw new RuntimeException(ioe);        }     }     static final long serialVersionUID = -8771775154092422943L;}