org.argeo.api.acr/src/org/argeo/api/acr/spi/ProvidedSession.java

   1 package org.argeo.api.acr.spi;
   2
   3 import java.util.Collections;
   4 import java.util.Iterator;
   5 import java.util.Set;
   6
   7 import javax.xml.XMLConstants;
   8 import javax.xml.namespace.NamespaceContext;
   9
  10 import org.argeo.api.acr.ContentNameSupplier;
  11 import org.argeo.api.acr.ContentSession;
  12
  13 public interface ProvidedSession extends ContentSession, NamespaceContext {
  14         ProvidedRepository getRepository();
  15
  16         /*
  17          * NAMESPACE CONTEXT
  18          */
  19         /** @return the bound namespace or null if not found */
  20         String findNamespace(String prefix);
  21
  22         // TODO find the default prefix?
  23         Set<String> findPrefixes(String namespaceURI);
  24
  25         /** To be overridden for optimisation, as it will be called a lot */
  26         default String findPrefix(String namespaceURI) {
  27                 Set<String> prefixes = findPrefixes(namespaceURI);
  28                 if (prefixes.isEmpty())
  29                         return null;
  30                 return prefixes.iterator().next();
  31         }
  32
  33         @Override
  34         default String getNamespaceURI(String prefix) {
  35                 String namespaceURI = ContentNameSupplier.getStandardNamespaceURI(prefix);
  36                 if (namespaceURI != null)
  37                         return namespaceURI;
  38                 if (XMLConstants.DEFAULT_NS_PREFIX.equals(prefix))
  39                         return XMLConstants.NULL_NS_URI;
  40                 namespaceURI = findNamespace(prefix);
  41                 if (namespaceURI != null)
  42                         return namespaceURI;
  43                 return XMLConstants.NULL_NS_URI;
  44         }
  45
  46         @Override
  47         default String getPrefix(String namespaceURI) {
  48                 String prefix = ContentNameSupplier.getStandardPrefix(namespaceURI);
  49                 if (prefix != null)
  50                         return prefix;
  51                 if (XMLConstants.NULL_NS_URI.equals(namespaceURI))
  52                         return XMLConstants.DEFAULT_NS_PREFIX;
  53                 return findPrefix(namespaceURI);
  54         }
  55
  56         @Override
  57         default Iterator<String> getPrefixes(String namespaceURI) {
  58                 Iterator<String> standard = ContentNameSupplier.getStandardPrefixes(namespaceURI);
  59                 if (standard != null)
  60                         return standard;
  61                 if (XMLConstants.NULL_NS_URI.equals(namespaceURI))
  62                         return Collections.singleton(XMLConstants.DEFAULT_NS_PREFIX).iterator();
  63                 Set<String> prefixes = findPrefixes(namespaceURI);
  64                 assert prefixes != null;
  65                 return prefixes.iterator();
  66         }
  67
  68 }