/*
* The Apache Software License, Version 1.1
*
*
* Copyright (c) 1999 The Apache Software Foundation. All rights
* reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* 3. The end-user documentation included with the redistribution,
* if any, must include the following acknowledgment:
* "This product includes software developed by the
* Apache Software Foundation (http://www.apache.org/)."
* Alternately, this acknowledgment may appear in the software itself,
* if and wherever such third-party acknowledgments normally appear.
*
* 4. The names "Xalan" and "Apache Software Foundation" must
* not be used to endorse or promote products derived from this
* software without prior written permission. For written
* permission, please contact apache@apache.org.
*
* 5. Products derived from this software may not be called "Apache",
* nor may "Apache" appear in their name, without prior written
* permission of the Apache Software Foundation.
*
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
* ====================================================================
*
* This software consists of voluntary contributions made by many
* individuals on behalf of the Apache Software Foundation and was
* originally based on software copyright (c) 1999, Lotus
* Development Corporation., http://www.lotus.com. For more
* information on the Apache Software Foundation, please see
* <http://www.apache.org/>.
*/
package org.apache.xalan.lib.sql;
import org.w3c.dom.Node;
import org.w3c.dom.Document;
import org.w3c.dom.DOMException;
import java.sql.SQLException;
import java.sql.ResultSet;
import java.sql.ResultSetMetaData;
/**
* <meta name="usage" content="experimental"/>
* This class represents the row-set StreamableNode, a "streamable" holder
* for the JDBC query result set.
*/
public class RowSet extends StreamableNode
{
/** Array of column headers in this row-set */
ColumnHeader[] m_columnHeaders;
/** First row in this row-set */
Row m_firstrow;
/** Flag for debug mode */
private static final boolean DEBUG = false;
/**
* Constructor RowSet
*
*
* @param statement Owning document
*/
public RowSet(XStatement statement)
{
super(statement);
}
// ===== Element implementation =====
/**
* Return node name: "row-set".
*
* @return "row-set".
*/
public String getNodeName()
{
return XStatement.S_DOCELEMENTNAME;
}
/**
* The first time the client asks for a column-header element, instantiate an array of ColumnHeaders
* (1 per column), and return the ColumnHeader for the first row.
* @return ColumnHeader Node for first row or null.
*/
public Node getFirstChild()
{
if (DEBUG)
System.out.println("In RowSet.getFirstChild");
try
{
org.apache.xpath.patterns.NodeTest nt = this.getNodeTest();
if ((null == nt) || nt.getNamespace() == null)
{
if ((null == nt) || nt.getLocalName().equals(
XStatement.S_COLUMNHEADERNAME))
{
if (null == m_columnHeaders)
{
ResultSetMetaData metaData =
getXStatement().m_resultSet.getMetaData();
int columnCount = metaData.getColumnCount();
if (columnCount > 0)
{
m_columnHeaders = new ColumnHeader[columnCount];
m_columnHeaders[0] = new ColumnHeader(getXStatement(), this, 0,
metaData);
return m_columnHeaders[0];
}
else
return null;
}
else
return m_columnHeaders[0];
}
else if (nt.getLocalName().equals(
XStatement.S_ROWNAME))
{
if (null == m_firstrow)
{
m_firstrow = new Row(getXStatement(), this);
}
return m_firstrow;
}
else
return null;
}
else
return null;
}
catch (SQLException sqle)
{
// diagnostics?
return null;
}
}
/**
* getNextSibling - This always returns null.
*
* @return null
*/
public Node getNextSibling()
{
if (DEBUG)
System.out.println("In RowSet.getNextSibling");
return null;
}
/**
* The parent node of row-set is #Document (represented by XStatement).
*
* @return Owner document
*/
public Node getParentNode()
{
if (DEBUG)
System.out.println("In RowSet.getParentNode");
return this.getXStatement();
}
/**
* Tell if there are any children of the document,
* which is always true.
*
* @return True
*/
public boolean hasChildNodes()
{
if (DEBUG)
System.out.println("In RowSet.hasChildNodes");
return true;
}
}