XMLSecurityStreamReader.java 文件源码

@SuppressWarnings("unchecked")
@Override
public String getNamespacePrefix(int index) {
    XMLSecEvent xmlSecEvent = getCurrentEvent();
    switch (xmlSecEvent.getEventType()) {
        case START_ELEMENT:
            return xmlSecEvent.asStartElement().getOnElementDeclaredNamespaces().get(index).getPrefix();
        case END_ELEMENT:
            int count = 0;
            Iterator<Namespace> namespaceIterator = xmlSecEvent.asEndElement().getNamespaces();
            while (namespaceIterator.hasNext()) {
                Namespace namespace = namespaceIterator.next();
                if (count == index) {
                    return namespace.getPrefix();
                }
                count++;
            }
            throw new ArrayIndexOutOfBoundsException(index);
        default:
            throw new IllegalStateException(ERR_STATE_NOT_ELEM);
    }
}