293 lines
10 KiB
Java
293 lines
10 KiB
Java
/*
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* Copyright (c) 2003, 2013, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation. Oracle designates this
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* particular file as subject to the "Classpath" exception as provided
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* by Oracle in the LICENSE file that accompanied this code.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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package com.sun.rowset;
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import java.sql.*;
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import javax.sql.*;
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import java.io.*;
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import java.math.*;
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import java.util.*;
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import java.text.*;
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import org.xml.sax.*;
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import javax.sql.rowset.*;
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import javax.sql.rowset.spi.*;
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import com.sun.rowset.providers.*;
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import com.sun.rowset.internal.*;
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/**
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* The standard implementation of the <code>WebRowSet</code> interface. See the interface
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* definition for full behavior and implementation requirements.
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*
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* @author Jonathan Bruce, Amit Handa
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*/
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public class WebRowSetImpl extends CachedRowSetImpl implements WebRowSet {
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/**
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* The <code>WebRowSetXmlReader</code> object that this
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* <code>WebRowSet</code> object will call when the method
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* <code>WebRowSet.readXml</code> is invoked.
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*/
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private WebRowSetXmlReader xmlReader;
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/**
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* The <code>WebRowSetXmlWriter</code> object that this
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* <code>WebRowSet</code> object will call when the method
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* <code>WebRowSet.writeXml</code> is invoked.
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*/
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private WebRowSetXmlWriter xmlWriter;
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/* This stores the cursor position prior to calling the writeXML.
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* This variable is used after the write to restore the position
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* to the point where the writeXml was called.
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*/
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private int curPosBfrWrite;
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private SyncProvider provider;
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/**
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* Constructs a new <code>WebRowSet</code> object initialized with the
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* default values for a <code>CachedRowSet</code> object instance. This
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* provides the <code>RIOptimistic</code> provider to deliver
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* synchronization capabilities to relational datastores and a default
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* <code>WebRowSetXmlReader</code> object and a default
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* <code>WebRowSetXmlWriter</code> object to enable XML output
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* capabilities.
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*
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* @throws SQLException if an error occurs in configuring the default
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* synchronization providers for relational and XML providers.
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*/
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public WebRowSetImpl() throws SQLException {
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super();
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// %%%
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// Needs to use to SPI XmlReader,XmlWriters
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//
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xmlReader = new WebRowSetXmlReader();
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xmlWriter = new WebRowSetXmlWriter();
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}
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/**
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* Constructs a new <code>WebRowSet</code> object initialized with the the
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* synchronization SPI provider properties as specified in the <code>Hashtable</code>. If
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* this hashtable is empty or is <code>null</code> the default constructor is invoked.
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*
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* @throws SQLException if an error occurs in configuring the specified
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* synchronization providers for the relational and XML providers; or
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* if the Hashtanle is null
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*/
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@SuppressWarnings("rawtypes")
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public WebRowSetImpl(Hashtable env) throws SQLException {
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try {
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resBundle = JdbcRowSetResourceBundle.getJdbcRowSetResourceBundle();
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} catch(IOException ioe) {
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throw new RuntimeException(ioe);
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}
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if ( env == null) {
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throw new SQLException(resBundle.handleGetObject("webrowsetimpl.nullhash").toString());
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}
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String providerName =
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(String)env.get(javax.sql.rowset.spi.SyncFactory.ROWSET_SYNC_PROVIDER);
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// set the Reader, this maybe overridden latter
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provider = SyncFactory.getInstance(providerName);
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// xmlReader = provider.getRowSetReader();
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// xmlWriter = provider.getRowSetWriter();
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}
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/**
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* Populates this <code>WebRowSet</code> object with the
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* data in the given <code>ResultSet</code> object and writes itself
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* to the given <code>java.io.Writer</code> object in XML format.
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* This includes the rowset's data, properties, and metadata.
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*
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* @throws SQLException if an error occurs writing out the rowset
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* contents to XML
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*/
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public void writeXml(ResultSet rs, java.io.Writer writer)
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throws SQLException {
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// WebRowSetImpl wrs = new WebRowSetImpl();
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this.populate(rs);
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// Store the cursor position before writing
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curPosBfrWrite = this.getRow();
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this.writeXml(writer);
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}
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/**
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* Writes this <code>WebRowSet</code> object to the given
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* <code>java.io.Writer</code> object in XML format. This
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* includes the rowset's data, properties, and metadata.
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*
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* @throws SQLException if an error occurs writing out the rowset
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* contents to XML
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*/
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public void writeXml(java.io.Writer writer) throws SQLException {
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// %%%
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// This will change to a XmlReader, which over-rides the default
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// Xml that is used when a WRS is instantiated.
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// WebRowSetXmlWriter xmlWriter = getXmlWriter();
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if (xmlWriter != null) {
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// Store the cursor position before writing
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curPosBfrWrite = this.getRow();
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xmlWriter.writeXML(this, writer);
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} else {
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throw new SQLException(resBundle.handleGetObject("webrowsetimpl.invalidwr").toString());
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}
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}
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/**
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* Reads this <code>WebRowSet</code> object in its XML format.
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*
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* @throws SQLException if a database access error occurs
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*/
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public void readXml(java.io.Reader reader) throws SQLException {
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// %%%
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// This will change to a XmlReader, which over-rides the default
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// Xml that is used when a WRS is instantiated.
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//WebRowSetXmlReader xmlReader = getXmlReader();
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try {
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if (reader != null) {
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xmlReader.readXML(this, reader);
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// Position is before the first row
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// The cursor position is to be stored while serializng
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// and deserializing the WebRowSet Object.
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if(curPosBfrWrite == 0) {
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this.beforeFirst();
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}
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// Return the position back to place prior to callin writeXml
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else {
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this.absolute(curPosBfrWrite);
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}
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} else {
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throw new SQLException(resBundle.handleGetObject("webrowsetimpl.invalidrd").toString());
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}
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} catch (Exception e) {
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throw new SQLException(e.getMessage());
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}
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}
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// Stream based methods
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/**
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* Reads a stream based XML input to populate this <code>WebRowSet</code>
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* object.
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*
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* @throws SQLException if a data source access error occurs
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* @throws IOException if a IO exception occurs
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*/
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public void readXml(java.io.InputStream iStream) throws SQLException, IOException {
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if (iStream != null) {
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xmlReader.readXML(this, iStream);
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// Position is before the first row
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// The cursor position is to be stored while serializng
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// and deserializing the WebRowSet Object.
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if(curPosBfrWrite == 0) {
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this.beforeFirst();
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}
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// Return the position back to place prior to callin writeXml
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else {
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this.absolute(curPosBfrWrite);
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}
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} else {
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throw new SQLException(resBundle.handleGetObject("webrowsetimpl.invalidrd").toString());
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}
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}
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/**
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* Writes this <code>WebRowSet</code> object to the given <code> OutputStream</code>
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* object in XML format.
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* Creates an an output stream of the internal state and contents of a
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* <code>WebRowSet</code> for XML proceessing
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*
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* @throws SQLException if a datasource access error occurs
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* @throws IOException if an IO exception occurs
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*/
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public void writeXml(java.io.OutputStream oStream) throws SQLException, IOException {
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if (xmlWriter != null) {
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// Store the cursor position before writing
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curPosBfrWrite = this.getRow();
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xmlWriter.writeXML(this, oStream);
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} else {
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throw new SQLException(resBundle.handleGetObject("webrowsetimpl.invalidwr").toString());
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}
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}
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/**
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* Populates this <code>WebRowSet</code> object with the
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* data in the given <code>ResultSet</code> object and writes itself
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* to the given <code>java.io.OutputStream</code> object in XML format.
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* This includes the rowset's data, properties, and metadata.
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*
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* @throws SQLException if a datasource access error occurs
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* @throws IOException if an IO exception occurs
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*/
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public void writeXml(ResultSet rs, java.io.OutputStream oStream) throws SQLException, IOException {
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this.populate(rs);
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// Store the cursor position before writing
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curPosBfrWrite = this.getRow();
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this.writeXml(oStream);
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}
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/**
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* This method re populates the resBundle
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* during the deserialization process
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*
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*/
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private void readObject(ObjectInputStream ois) throws IOException, ClassNotFoundException {
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// Default state initialization happens here
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ois.defaultReadObject();
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// Initialization of transient Res Bundle happens here .
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try {
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resBundle = JdbcRowSetResourceBundle.getJdbcRowSetResourceBundle();
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} catch(IOException ioe) {
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throw new RuntimeException(ioe);
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}
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}
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static final long serialVersionUID = -8771775154092422943L;
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}
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