/*
* JBoss, Home of Professional Open Source
*
* Copyright 2013 Red Hat, Inc. and/or its affiliates.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.picketlink.identity.federation.core.parsers.saml.metadata;
import org.picketlink.common.exceptions.ParsingException;
import org.picketlink.common.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);
}
}
}