Class FileBasedNamespaceMappings

  • All Implemented Interfaces:
    NamespaceMappings, NamespaceResolver

    public class FileBasedNamespaceMappings
    extends AbstractNamespaceMappings
    The class NamespaceMappings implements a NamespaceResolver that holds a namespace mapping that is used internally in the search index. Storing paths with the full uri of a namespace would require too much space in the search index.

    Whenever a yet unknown namespace uri to prefix mapping is requested, a new prefix is created on the fly and associated with the namespace. Known namespace mappings are stored in a properties file.

    • Constructor Detail

      • FileBasedNamespaceMappings

        public FileBasedNamespaceMappings​(File file)
                                   throws IOException
        Creates NamespaceMappings instance. Initial mappings are loaded from file.
        file - the File to load initial mappings.
        IOException - if an error occurs while reading initial namespace mappings from file.
    • Method Detail

      • getURI

        public String getURI​(String prefix)
                      throws NamespaceException
        Returns a namespace uri for a prefix.
        prefix - the namespace prefix.
        the namespace uri.
        NamespaceException - if no namespace uri is registered for prefix.
      • getPrefix

        public String getPrefix​(String uri)
                         throws NamespaceException
        Returns a prefix for the namespace uri. If a namespace mapping exists, the already known prefix is returned; otherwise a new prefix is created and assigned to the namespace uri.
        uri - the namespace uri.
        the prefix for the namespace uri.
        NamespaceException - if an yet unknown namespace uri / prefix mapping could not be stored.