gcr/ContentNameSupplier.java

   1 package org.argeo.api.gcr;
   2
   3 import java.util.Collections;
   4 import java.util.Iterator;
   5 import java.util.function.Supplier;
   6
   7 import javax.xml.XMLConstants;
   8 import javax.xml.namespace.NamespaceContext;
   9
  10 public interface ContentNameSupplier extends Supplier<ContentName>, NamespaceContext {
  11         String name();
  12
  13         @Override
  14         default ContentName get() {
  15                 return toContentName();
  16         }
  17
  18         default ContentName toContentName() {
  19                 CompositeString cs = new CompositeString(name());
  20                 String camlName = cs.toStringCaml(false);
  21                 return new ContentName(getNamespaceURI(), camlName, this);
  22         }
  23
  24         default String getNamespaceURI() {
  25                 return XMLConstants.NULL_NS_URI;
  26         }
  27
  28         default String getDefaultPrefix() {
  29                 return XMLConstants.DEFAULT_NS_PREFIX;
  30         }
  31
  32 //      static ContentName toContentName(String namespaceURI, String localName, String prefix) {
  33 //              CompositeString cs = new CompositeString(localName);
  34 //              String camlName = cs.toStringCaml(false);
  35 //              return new ContentName(namespaceURI, camlName, this);
  36 //      }
  37
  38         /*
  39          * NAMESPACE CONTEXT
  40          */
  41
  42         @Override
  43         default String getNamespaceURI(String prefix) {
  44                 String namespaceURI = getStandardNamespaceURI(prefix);
  45                 if (namespaceURI != null)
  46                         return namespaceURI;
  47                 if (prefix.equals(getDefaultPrefix()))
  48                         return getNamespaceURI();
  49                 return XMLConstants.NULL_NS_URI;
  50         }
  51
  52         @Override
  53         default String getPrefix(String namespaceURI) {
  54                 String prefix = getStandardPrefix(namespaceURI);
  55                 if (prefix != null)
  56                         return prefix;
  57                 if (namespaceURI.equals(getNamespaceURI()))
  58                         return getDefaultPrefix();
  59                 return null;
  60         }
  61
  62         @Override
  63         default Iterator<String> getPrefixes(String namespaceURI) {
  64                 Iterator<String> it = getStandardPrefixes(namespaceURI);
  65                 if (it != null)
  66                         return it;
  67                 if (namespaceURI.equals(getNamespaceURI()))
  68                         return Collections.singleton(getDefaultPrefix()).iterator();
  69                 return Collections.emptyIterator();
  70         }
  71
  72         /*
  73          * DEFAULT NAMESPACE CONTEXT OPERATIONS as specified in NamespaceContext
  74          */
  75         static String getStandardPrefix(String namespaceURI) {
  76                 if (namespaceURI == null)
  77                         throw new IllegalArgumentException("Namespace URI cannot be null");
  78                 if (XMLConstants.XML_NS_URI.equals(namespaceURI))
  79                         return XMLConstants.XML_NS_PREFIX;
  80                 else if (XMLConstants.XMLNS_ATTRIBUTE_NS_URI.equals(namespaceURI))
  81                         return XMLConstants.XMLNS_ATTRIBUTE;
  82                 return null;
  83         }
  84
  85         static Iterator<String> getStandardPrefixes(String namespaceURI) {
  86                 String prefix = ContentNameSupplier.getStandardPrefix(namespaceURI);
  87                 if (prefix == null)
  88                         return null;
  89                 return Collections.singleton(prefix).iterator();
  90         }
  91
  92         static String getStandardNamespaceURI(String prefix) {
  93                 if (prefix == null)
  94                         throw new IllegalArgumentException("Prefix cannot be null");
  95                 if (XMLConstants.XML_NS_PREFIX.equals(prefix))
  96                         return XMLConstants.XML_NS_URI;
  97                 else if (XMLConstants.XMLNS_ATTRIBUTE.equals(prefix))
  98                         return XMLConstants.XMLNS_ATTRIBUTE_NS_URI;
  99                 return null;
 100         }
 101
 102 }