com.arjuna.common.util.propertyservice.PropertiesFactoryStax Maven / Gradle / Ivy
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* Copyright 2014, Red Hat, Inc., and individual contributors
* as indicated by the @author tags. See the copyright.txt file 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 com.arjuna.common.util.propertyservice;
import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.util.Properties;
import javax.xml.stream.XMLInputFactory;
import javax.xml.stream.XMLResolver;
import javax.xml.stream.XMLStreamConstants;
import javax.xml.stream.XMLStreamException;
import javax.xml.stream.XMLStreamReader;
/**
*
* @author Richard A. Begg ([email protected])
* @author Gytis Trikleris
*
*/
public class PropertiesFactoryStax extends AbstractPropertiesFactory {
@Override
protected Properties loadFromXML(Properties p, InputStream is) throws IOException {
try {
final XMLInputFactory inputFactory = XMLInputFactory.newInstance();
inputFactory.setXMLResolver(new XMLResolver() {
@Override
public Object resolveEntity(String publicID, String systemID, String baseURI, String namespace)
throws XMLStreamException {
return new ByteArrayInputStream(new byte[0]);
}
});
XMLStreamReader parser = inputFactory.createXMLStreamReader(is);
/*
* xml looks like this 1
*/
int event = -1;
while (true) {
if (event == XMLStreamConstants.END_DOCUMENT) {
parser.close();
break;
}
if (event == XMLStreamConstants.START_ELEMENT && parser.getAttributeCount() > 0) {
String key = parser.getAttributeValue(0);
StringBuffer buffer = new StringBuffer();
event = parser.next();
for (; event == XMLStreamConstants.CHARACTERS || event == XMLStreamConstants.COMMENT; event = parser.next()) {
if (event != XMLStreamConstants.COMMENT) {
String nextText = parser.getText();
buffer.append(nextText);
}
}
if (key != null) {
String value = buffer.toString();
p.put(key, value);
}
} else {
event = parser.next();
}
}
} catch (XMLStreamException e) {
throw new IOException("Could not read xml", e);
}
return null;
}
}