/*--
$Id: LineNumberSAXBuilder.java,v 1.3 2004/02/06 09:57:48 jhunter Exp $
Copyright (C) 2004 Jason Hunter & Brett McLaughlin.
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 disclaimer that follows
these conditions in the documentation and/or other materials
provided with the distribution.
3. The name "JDOM" must not be used to endorse or promote products
derived from this software without prior written permission. For
written permission, please contact <request_AT_jdom_DOT_org>.
4. Products derived from this software may not be called "JDOM", nor
may "JDOM" appear in their name, without prior written permission
from the JDOM Project Management <request_AT_jdom_DOT_org>.
In addition, we request (but do not require) that you include in the
end-user documentation provided with the redistribution and/or in the
software itself an acknowledgement equivalent to the following:
"This product includes software developed by the
JDOM Project (http://www.jdom.org/)."
Alternatively, the acknowledgment may be graphical using the logos
available at http://www.jdom.org/images/logos.
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 JDOM AUTHORS OR THE PROJECT
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 JDOM Project and was originally
created by Jason Hunter <jhunter_AT_jdom_DOT_org> and
Brett McLaughlin <brett_AT_jdom_DOT_org>. For more information
on the JDOM Project, please see <http://www.jdom.org/>.
*/
package org.jdom.contrib.input;
import org.jdom.Element;
import org.jdom.Namespace;
import org.jdom.DefaultJDOMFactory;
import org.jdom.JDOMFactory;
import org.jdom.input.SAXBuilder;
import org.jdom.input.SAXHandler;
import org.xml.sax.Attributes;
import org.xml.sax.Locator;
import org.xml.sax.SAXException;
/**
* This builder works in parallell with {@link LineNumberElement}
* to provide each element with information on its beginning and
* ending line number in the corresponding source.
* This only works for SAX parsers that supply that information, and
* since this is optional, there are no guarantees.
* <p>
* Note that this builder always creates its own for each
* build, thereby cancelling any previous call to setFactory.
* <p>
* All elements created are instances of {@link LineNumberElement}.
* No other construct currently receive line number information.
*
* @author Per Norrman
*
*/
public class LineNumberSAXBuilder extends SAXBuilder
{
protected SAXHandler createContentHandler()
{
return new MySAXHandler(new MyFactory());
}
private class MyFactory extends DefaultJDOMFactory
{
public Element element(String name)
{
return new LineNumberElement(name);
}
public Element element(String name, String prefix, String uri)
{
return new LineNumberElement(name, prefix, uri);
}
public Element element(String name, Namespace namespace)
{
return new LineNumberElement(name, namespace);
}
public Element element(String name, String uri)
{
return new LineNumberElement(name, uri);
}
}
private class MySAXHandler extends SAXHandler
{
public MySAXHandler(JDOMFactory f)
{
super(f);
}
/** override */
public void startElement(
String arg0,
String arg1,
String arg2,
Attributes arg3)
throws SAXException
{
super.startElement(arg0, arg1, arg2, arg3);
Locator l = getDocumentLocator();
if (l != null)
{
((LineNumberElement) getCurrentElement()).setStartLine(
l.getLineNumber());
}
}
/** override */
public void endElement(String arg0, String arg1, String arg2)
throws SAXException
{
Locator l = getDocumentLocator();
if (l != null)
{
((LineNumberElement) getCurrentElement()).setEndLine(
l.getLineNumber());
}
super.endElement(arg0, arg1, arg2);
}
}
}