/**
* It is expected that a Docbook 5 book or article will define the namespaces at the root element.
* But for validation against a single topic, we need to add these namespaces in in order for the
* dtd to validate.
*
* @param xml The source xml
* @return the xml with the docbook 5 namespaces added
*/
public static String addDocBook50Namespaces(@NotNull final String xml) {
final String rootEleName = XMLUtilities.getRootElementName(xml);
final String fixedRootEleName = rootEleName == null ? "section" : rootEleName;
final MatchResult result =
RegExp.compile("^([\\s\\S]*?)<\\s*" + fixedRootEleName + "(\\s*.*?)>").exec(xml);
if (result != null) {
final StringBuilder retValue = new StringBuilder(result.getGroup(1));
retValue.append("<" + fixedRootEleName);
// Clean out the normal attributes
String fixedAttributes = result.getGroup(2);
// Remove any current namespace declaration
fixedAttributes = fixedAttributes.replaceFirst(" xmlns\\s*=\\s*('|\").*?('|\")", "");
// Remove any current version declaration
fixedAttributes = fixedAttributes.replaceFirst(" version\\s*=\\s*('|\").*?('|\")", "");
// Remove any current xlink namespace declaration
fixedAttributes = fixedAttributes.replaceFirst(" xmlns:xlink\\s*=\\s*('|\").*?('|\")", "");
// Add the generic attributes
retValue.append(" xmlns=\"http://docbook.org/ns/docbook\"");
retValue.append(" version=\"5.0\"");
if (!rootEleName.equalsIgnoreCase("info")) {
// Info is not allowed to have xlink declared for the DocBook 5.0 DTD
retValue.append(" xmlns:xlink=\"http://www.w3.org/1999/xlink\"");
}
retValue.append(fixedAttributes + ">");
return xml.replace(result.getGroup(0), retValue.toString());
}
return xml;
}
