/**
* Redistribution and use of this software and associated documentation
* ("Software"), with or without modification, are permitted provided
* that the following conditions are met:
*
* 1. Redistributions of source code must retain copyright
* statements and notices. Redistributions must also contain a
* copy of this document.
*
* 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 name "Exolab" must not be used to endorse or promote
* products derived from this Software without prior written
* permission of Intalio, Inc. For written permission,
* please contact info@exolab.org.
*
* 4. Products derived from this Software may not be called "Exolab"
* nor may "Exolab" appear in their names without prior written
* permission of Intalio, Inc. Exolab is a registered
* trademark of Intalio, Inc.
*
* 5. Due credit should be given to the Exolab Project
* (http://www.exolab.org/).
*
* THIS SOFTWARE IS PROVIDED BY INTALIO, INC. AND CONTRIBUTORS
* ``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
* INTALIO, INC. 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.
*
* Copyright 1999 (C) Intalio, Inc. All Rights Reserved.
*
* $Id: Consumer.java 7951 2008-10-09 20:52:17Z wguttmn $
*/
package org.exolab.castor.dsml;
import java.util.Enumeration;
import org.xml.sax.DocumentHandler;
import org.xml.sax.SAXException;
import org.xml.sax.AttributeList;
import org.xml.sax.Locator;
import org.castor.core.util.Messages;
/**
*
*
* @author <a href="mailto:arkin@intalio.com">Assaf Arkin</a>
* @version $Revision: 7951 $ $Date: 2006-04-26 13:58:52 -0600 (Wed, 26 Apr 2006) $
*/
public abstract class Consumer
implements DocumentHandler
{
private boolean _insideRoot;
private DocumentHandler _redirect;
public Consumer()
{
}
public abstract Enumeration getResults();
protected abstract DocumentHandler getEntryConsumer();
public void startElement( String tagName, AttributeList attr )
throws SAXException
{
if ( _redirect != null ) {
// When redirecting all element creations pass directly to
// the other handler, we only look for closure.
_redirect.startElement( tagName, attr );
} else if ( tagName.equals( XML.Namespace.Root ) ) {
// Flag when entering (and leaving) the root element.
if ( _insideRoot )
throw new SAXException( Messages.format( "dsml.elementNested",
XML.Namespace.Root ) );
_insideRoot = true;
} else {
if ( ! _insideRoot )
throw new SAXException( Messages.format( "dsml.expectingOpeningTag",
XML.Namespace.Root, tagName ) );
if ( tagName.equals( XML.Schema.Element ) ||
tagName.equals( XML.Entries.Element ) ) {
DocumentHandler entry;
entry = getEntryConsumer();
entry.startElement( tagName, attr );
_redirect = entry;
} else {
throw new SAXException( Messages.format( "dsml.openingTagNotRecognized",
tagName ) );
}
}
}
public void endElement( String tagName )
throws SAXException
{
if ( _redirect == null ) {
// This is the only case where we expect the root element
// to be closed.
if ( tagName.equals( XML.Namespace.Root ) ) {
if ( _insideRoot == true )
_insideRoot = false;
else
throw new SAXException( Messages.format( "dsml.closingOutsideRoot",
tagName ) );
} else {
throw new SAXException( Messages.format( "dsml.expectingClosingTag",
XML.Namespace.Root, tagName ) );
}
} else {
_redirect.endElement( tagName );
if ( tagName.equals( XML.Schema.Element ) ||
tagName.equals( XML.Entries.Element ) ) {
// If we've reached this point we must be inside the
// entries/schema redirect.
_redirect = null;
}
// If we've reached this point we must be inside the
// entries/schema redirect, we ignore all closing tags.
}
}
public void characters( char[] ch, int offset, int length )
throws SAXException
{
if ( _redirect != null ) {
_redirect.characters( ch, offset, length );
}
}
public void ignorableWhitespace( char[] ch, int offset, int length )
throws SAXException
{
if ( _redirect != null ) {
_redirect.ignorableWhitespace( ch, offset, length );
}
}
public void processingInstruction( String target, String instruction )
throws SAXException
{
if ( _redirect != null ) {
_redirect.processingInstruction( target, instruction );
}
}
public void startDocument()
throws SAXException
{
}
public void endDocument()
throws SAXException
{
if ( _insideRoot )
throw new SAXException( Messages.message( "dsml.documentRootStillOpen" ) );
}
public void setDocumentLocator( Locator locator )
{
}
}