/*
* JBoss, a division of Red Hat
* Copyright 2012, Red Hat Middleware, LLC, and individual
* contributors as indicated by the @authors tag. See the
* copyright.txt in the distribution for a full listing of
* individual contributors.
*
* This is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 2.1 of
* the License, or (at your option) any later version.
*
* This software 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this software; if not, write to the Free
* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA, or see the FSF site: http://www.fsf.org.
*/
package org.picketlink.identity.federation.core.parsers.saml.metadata;
import org.picketlink.identity.federation.core.exceptions.ParsingException;
import org.picketlink.identity.federation.core.parsers.AbstractParser;
import javax.xml.stream.EventFilter;
import javax.xml.stream.XMLEventReader;
import javax.xml.stream.XMLInputFactory;
import javax.xml.stream.XMLStreamException;
import javax.xml.stream.events.Characters;
import javax.xml.stream.events.XMLEvent;
/**
* <p>Abstract entity descriptor parser, which provides common parser functionality</p>
* @author <a href="mailto:mposolda@redhat.com">Marek Posolda</a>
*/
public abstract class AbstractDescriptorParser extends AbstractParser {
protected XMLEventReader filterWhiteSpaceCharacters(XMLEventReader xmlEventReader) throws ParsingException {
XMLInputFactory xmlInputFactory = getXMLInputFactory();
try {
xmlEventReader = xmlInputFactory.createFilteredReader(xmlEventReader, new EventFilter() {
public boolean accept(XMLEvent xmlEvent) {
// We are going to disregard characters that are new line and whitespace
if (xmlEvent.isCharacters()) {
Characters chars = xmlEvent.asCharacters();
String data = chars.getData();
data = valid(data) ? data.trim() : null;
return valid(data);
} else {
return xmlEvent.isStartElement() || xmlEvent.isEndElement();
}
}
private boolean valid(String str) {
return str != null && str.length() > 0;
}
});
return xmlEventReader;
} catch (XMLStreamException e) {
throw new ParsingException(e);
}
}
}