src/java.sql.rowset/share/classes/com/sun/rowset/WebRowSetImpl.java
changeset 47216 71c04702a3d5
parent 28059 e576535359cc
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/java.sql.rowset/share/classes/com/sun/rowset/WebRowSetImpl.java	Tue Sep 12 19:03:39 2017 +0200
@@ -0,0 +1,292 @@
+/*
+ * Copyright (c) 2003, 2013, 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
+ * definition for full behavior 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
+     * 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
+     */
+    @SuppressWarnings("rawtypes")
+    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 = 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 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;
+}