How to use

setMapping

method

in

com.helger.xml.namespace.MapBasedNamespaceContext

/**
 * Set the default namespace URL
 *
 * @param sNamespaceURI
 *        The namespace URI to be used as the default. May not be
 *        <code>null</code> but maybe empty.
 * @return this
 */
@Nonnull
public final MapBasedNamespaceContext setDefaultNamespaceURI (@Nonnull final String sNamespaceURI)
{
 return setMapping (XMLConstants.DEFAULT_NS_PREFIX, sNamespaceURI);
}

@Nonnull
public final MapBasedNamespaceContext setMappings (@Nullable final Map <String, String> aOther)
{
 if (aOther != null)
  for (final Map.Entry <String, String> aEntry : aOther.entrySet ())
   setMapping (aEntry.getKey (), aEntry.getValue ());
 return this;
}

public static void addMapping (@Nonnull final String sPrefix, @Nonnull final String sNamespaceURI)
{
 // Allow overwrite!
 s_aRWLock.writeLocked ( () -> s_aCtx.setMapping (sPrefix, sNamespaceURI));
}

public EbInterfaceWriter (@Nonnull final EEbInterfaceDocumentType eDocType)
{
 super (eDocType);
 // Create a default namespace context for the passed document type
 final MapBasedNamespaceContext aNSContext = new MapBasedNamespaceContext ();
 aNSContext.setMapping ("eb", m_aDocType.getNamespaceURI ());
 setNamespaceContext (aNSContext);
}

public void writeNamespace (@Nullable final String sPrefix,
              @Nonnull final String sNamespaceURI) throws XMLStreamException
{
 debug ( () -> "writeNamespace (" + sPrefix + ", " + sNamespaceURI + ")");
 if (!m_bInElementStart)
  throw new IllegalStateException ("No element open");
 // Avoid double mapping
 final boolean bIsDefault = sPrefix == null ||
               sPrefix.equals (XMLConstants.DEFAULT_NS_PREFIX) ||
               sPrefix.equals (XMLConstants.XMLNS_ATTRIBUTE);
 if (bIsDefault)
  m_aNamespaceContext.m_aInternalContext.setDefaultNamespaceURI (sNamespaceURI);
 else
  m_aNamespaceContext.m_aInternalContext.setMapping (sPrefix, sNamespaceURI);
 if (bIsDefault)
  writeAttribute (null, null, XMLConstants.XMLNS_ATTRIBUTE, sNamespaceURI);
 else
  writeAttribute (XMLConstants.XMLNS_ATTRIBUTE, null, sPrefix, sNamespaceURI);
}