try {
XmpReader xmpr = new XmpReader(altMetadata);
if (!(xmpr.replaceNode("http://ns.adobe.com/pdf/1.3/", "Producer", producer)
|| xmpr.replaceDescriptionAttribute("http://ns.adobe.com/pdf/1.3/", "Producer", producer)))
xmpr.add("rdf:Description", "http://ns.adobe.com/pdf/1.3/", "pdf:Producer", producer);
if (!(xmpr.replaceNode("http://ns.adobe.com/xap/1.0/", "ModifyDate", date.getW3CDate())
|| xmpr.replaceDescriptionAttribute("http://ns.adobe.com/xap/1.0/", "ModifyDate", date.getW3CDate())))
xmpr.add("rdf:Description", "http://ns.adobe.com/xap/1.0/", "xmp:ModifyDate", date.getW3CDate());
if (!(xmpr.replaceNode("http://ns.adobe.com/xap/1.0/", "MetadataDate", date.getW3CDate())
|| xmpr.replaceDescriptionAttribute("http://ns.adobe.com/xap/1.0/", "MetadataDate", date.getW3CDate()))) {
}