How to use

getNsPrefixURI

method

in

com.hp.hpl.jena.shared.PrefixMapping

/** @see com.hp.hpl.jena.shared.PrefixMapping#getNsPrefixURI(java.lang.String) */
@Override
public String getNsPrefixURI(String prefix)
{
  String s = pmapLocal.getNsPrefixURI(prefix) ;
  if ( s != null )
    return s ;
  if ( pmapGlobal != null )
    return pmapGlobal.getNsPrefixURI(prefix) ;
  return null ;
}

/** Lookup a prefix for this query, including the default prefixes */
public String getPrefix(String prefix)
{
  return prefixMap.getNsPrefixURI(prefix) ;
}

/** Lookup a prefix for this query, including the default prefixes */
public String getPrefix(String prefix)
{
  return prefixMap.getNsPrefixURI(prefix) ;
}

/** @see com.hp.hpl.jena.shared.PrefixMapping#getNsPrefixURI(java.lang.String) */
public String getNsPrefixURI(String prefix)
{
  String s = pmapLocal.getNsPrefixURI(prefix) ;
  if ( s != null )
    return s ;
  if ( pmapGlobal != null )
    return pmapGlobal.getNsPrefixURI(prefix) ;
  return null ;
}

@Override
public String getNsPrefixURI(String prefix) {
  return this.prefixes.getNsPrefixURI(prefix);
}

/**
   Look for plausible candidates for prefixes in the SPARQL
   fragment and add them to <code>seen</code>.
*/
public void findPrefixesIn( String fragment ) {
  Matcher m = candidatePrefix.matcher( fragment );
  while (m.find()) {
    String candidate = m.group(1);
    if (pm.getNsPrefixURI( candidate ) != null) seen.add( candidate );
  }
}

/** @see com.hp.hpl.jena.shared.PrefixMapping#removeNsPrefix(java.lang.String) */
public PrefixMapping removeNsPrefix(String prefix)
{
  pmapLocal.removeNsPrefix(prefix) ;
  if ( pmapGlobal != null && pmapGlobal.getNsPrefixURI(prefix) != null )
    throw new UnsupportedOperationException("PrefixMapping2: prefix '"+prefix+"' in the immutable map") ;
  return this ;
}

public static String decodeMaybePrefixed(PrefixMapping pm, String shortName) {
  int cut = EldaNameUtils.prefixEndsAt( shortName );
  if (cut < 0) return null;
  String prefix = shortName.substring(0, cut - 1);
  String nameSpace = pm.getNsPrefixURI( prefix );
  if (nameSpace == null) return null;
  return nameSpace + shortName.substring(cut) ; 
}

/** @see com.hp.hpl.jena.shared.PrefixMapping#removeNsPrefix(java.lang.String) */
@Override
public PrefixMapping removeNsPrefix(String prefix)
{
  pmapLocal.removeNsPrefix(prefix) ;
  if ( pmapGlobal != null && pmapGlobal.getNsPrefixURI(prefix) != null )
    throw new UnsupportedOperationException("PrefixMapping2: prefix '"+prefix+"' in the immutable map") ;
  return this ;
}

private static String decodeMarkedPrefix( PrefixMapping pm, String prefix_encoded ) {
  int ubar = prefix_encoded.indexOf('_');
  if (ubar < 0) return null;
  String nameSpace = pm.getNsPrefixURI( prefix_encoded.substring(0, ubar) );
  if (nameSpace == null) return null;
  return nameSpace + decodeLightly( prefix_encoded.substring(ubar + 1) );
}

@Override
public String getNsPrefixURI( String prefix ) 
{ return getPrefixMapping().getNsPrefixURI( prefix ); }

/**
  Add SPARQL prefix declarations for all the prefixes in
  <code>pm</code> to the StringBuilder <code>q</code>.
*/
public static void appendPrefixes( StringBuilder q, PrefixMapping pm ) {
  for (String prefix: pm.getNsPrefixMap().keySet()) {
    q
      .append( "PREFIX " )
      .append( prefix )
      .append( ": <" )
      .append( pm.getNsPrefixURI(prefix) )
      .append( ">\n" );
  }
}

@Override public String getNsPrefixURI( String prefix ) 
  {
  PrefixMapping bm = getBaseMapping();
  String s = bm.getNsPrefixURI( prefix );
  if (s == null && prefix.length() > 0)
    {
    List<Graph> graphs = poly.getSubGraphs();
    for (int i = 0; i < graphs.size(); i += 1)
      {
      String ss = graphs.get(i).getPrefixMapping().getNsPrefixURI( prefix );
      if (ss != null) return ss;
      }
    }
  return s;
  }
  

/** Set a prefix for this query */
public void setPrefix(String prefix, String expansion)
{
  try {
    // Removal may involve regeneration of the reverse mapping
    // so only do if needed.   
    String oldExpansion = prefixMap.getNsPrefixURI(prefix) ;
    if ( Lib.equal(oldExpansion, expansion) )
      return ;
    if ( oldExpansion != null )
      prefixMap.removeNsPrefix(prefix) ;
    
    prefixMap.setNsPrefix(prefix, expansion) ;
  } catch (PrefixMapping.IllegalPrefixException ex)
  {
    Log.warn(this, "Illegal prefix mapping(ignored): "+prefix+"=>"+expansion) ;
  }
}   

@Test public void multiple2()
{
  DatasetPrefixesTDB prefixes = DatasetPrefixesTDB.testing() ;
  PrefixMapping pmap1 = prefixes.getPrefixMapping("http://graph/") ;  // Same
  PrefixMapping pmap2 = prefixes.getPrefixMapping("http://graph/") ;
  pmap1.setNsPrefix("x", "http://foo/") ;
  assertNotNull(pmap2.getNsPrefixURI("x")) ;
  assertNotNull(pmap1.getNsPrefixURI("x")) ;
}
 

@Test public void multiple1()
{
  DatasetPrefixesTDB prefixes = DatasetPrefixesTDB.testing() ;
  PrefixMapping pmap1 = prefixes.getPrefixMapping() ;
  PrefixMapping pmap2 = prefixes.getPrefixMapping("http://graph/") ;
  pmap1.setNsPrefix("x", "http://foo/") ;
  assertNull(pmap2.getNsPrefixURI("x")) ;
  assertNotNull(pmap1.getNsPrefixURI("x")) ;
}
 

@Test public void prefix2()
{
  PrefixMapping pmap = new PrefixMappingSDB(defaultPrefixURI, sdb) ;
  pmap.setNsPrefix("ex", "http://example/") ;
  assertNotNull(pmap.getNsPrefixURI("ex")) ;
}
 

@Test public void prefix3()
{
  String uri = "http://example/" ;
  PrefixMapping pmap = new PrefixMappingSDB(defaultPrefixURI, sdb) ;
  pmap.setNsPrefix("ex", uri) ;
  
  PrefixMapping pmap2 = new PrefixMappingSDB(defaultPrefixURI, sdb) ;
  String x = pmap2.getNsPrefixURI("ex") ;
  
  assertNotNull(x) ;
  assertEquals(uri,x) ;
}
   

@SuppressWarnings("deprecation")
@Test public void persistent1()
{
  String dir = ConfigTest.getTestingDir() ;
  FileOps.clearDirectory(dir) ;
  
  DatasetPrefixesTDB prefixes = DatasetPrefixesTDB.create(new Location(dir), new ConcurrencyPolicyMRSW()) ;
  PrefixMapping pmap1 = prefixes.getPrefixMapping() ;
  
  String x = pmap1.getNsPrefixURI("x") ;
  assertNull(x) ;
  prefixes.close();
}
 

@SuppressWarnings("deprecation")
@Test public void persistent2()
{
  String dir = ConfigTest.getTestingDir() ;
  FileOps.clearDirectory(dir) ;
  
  DatasetPrefixesTDB prefixes = DatasetPrefixesTDB.create(new Location(dir), new ConcurrencyPolicyMRSW()) ;
  PrefixMapping pmap1 = prefixes.getPrefixMapping() ;
  
  pmap1.setNsPrefix("x", "http://foo/") ;
  prefixes.close() ;
  
  prefixes = DatasetPrefixesTDB.create(new Location(dir), new ConcurrencyPolicyMRSW()) ;
  assertEquals("http://foo/", pmap1.getNsPrefixURI("x")) ;
  prefixes.close();
}