NamingManager.java [plain text]
package javax.naming.spi;
import java.util.Enumeration;
import java.util.Hashtable;
import java.util.StringTokenizer;
import javax.naming.CannotProceedException;
import javax.naming.Context;
import javax.naming.Name;
import javax.naming.NamingException;
import javax.naming.NoInitialContextException;
import javax.naming.RefAddr;
import javax.naming.Reference;
import javax.naming.Referenceable;
import javax.naming.StringRefAddr;
public class NamingManager
{
public static final String CPE = "java.naming.spi.CannotProceedException";
private static InitialContextFactoryBuilder icfb;
static ObjectFactoryBuilder ofb;
NamingManager ()
{
}
public static boolean hasInitialContextFactoryBuilder ()
{
return icfb != null;
}
public static Context getInitialContext (Hashtable environment)
throws NamingException
{
InitialContextFactory icf = null;
if (icfb != null)
icf = icfb.createInitialContextFactory(environment);
else
{
String java_naming_factory_initial = null;
if (environment != null)
java_naming_factory_initial
= (String) environment.get (Context.INITIAL_CONTEXT_FACTORY);
if (java_naming_factory_initial == null)
java_naming_factory_initial =
System.getProperty (Context.INITIAL_CONTEXT_FACTORY);
if (java_naming_factory_initial == null)
throw new
NoInitialContextException ("Can't find property: "
+ Context.INITIAL_CONTEXT_FACTORY);
try
{
icf = (InitialContextFactory)Class.forName
(java_naming_factory_initial, true,
Thread.currentThread().getContextClassLoader())
.newInstance ();
}
catch (Exception exception)
{
NoInitialContextException e
= new NoInitialContextException
("Can't load InitialContextFactory class: "
+ java_naming_factory_initial);
e.setRootCause(exception);
throw e;
}
}
return icf.getInitialContext (environment);
}
static Context getURLContext (Object refInfo,
Name name,
Context nameCtx,
String scheme,
Hashtable environment)
throws NamingException
{
String prefixes = null;
if (environment != null)
prefixes = (String) environment.get (Context.URL_PKG_PREFIXES);
if (prefixes == null)
prefixes = System.getProperty (Context.URL_PKG_PREFIXES);
if (prefixes == null)
{
prefixes = "com.sun.jndi.url";
}
scheme = scheme + "." + scheme + "URLContextFactory";
StringTokenizer tokens = new StringTokenizer (prefixes, ":");
while (tokens.hasMoreTokens ())
{
String aTry = tokens.nextToken ();
try
{
Class factoryClass = Class.forName (aTry + "." + scheme,
true,
Thread.currentThread().getContextClassLoader());
ObjectFactory factory =
(ObjectFactory) factoryClass.newInstance ();
Object obj = factory.getObjectInstance (refInfo, name,
nameCtx, environment);
Context ctx = (Context) obj;
if (ctx != null)
return ctx;
}
catch (ClassNotFoundException _1)
{
}
catch (ClassCastException _2)
{
}
catch (InstantiationException _3)
{
}
catch (IllegalAccessException _4)
{
}
catch (NamingException _5)
{
throw _5;
}
catch (Exception _6)
{
}
}
return null;
}
public static Context getURLContext (String scheme,
Hashtable environment)
throws NamingException
{
return getURLContext (null, null, null, scheme, environment);
}
public static void setObjectFactoryBuilder (ObjectFactoryBuilder builder)
throws NamingException
{
SecurityManager sm = System.getSecurityManager ();
if (sm != null)
sm.checkSetFactory ();
if (ofb != null)
throw new IllegalStateException ("builder already installed");
if (builder != null)
ofb = builder;
}
static StringTokenizer getPlusPath (String property, Hashtable env,
Context nameCtx)
throws NamingException
{
String path = (String) env.get (property);
if (nameCtx == null)
nameCtx = getInitialContext (env);
String path2 = (String) nameCtx.getEnvironment ().get (property);
if (path == null)
path = path2;
else if (path2 != null)
path += ":" + path2;
return new StringTokenizer (path != null ? path : "", ":");
}
public static Object getObjectInstance (Object refInfo,
Name name,
Context nameCtx,
Hashtable environment)
throws Exception
{
ObjectFactory factory = null;
if (ofb != null)
factory = ofb.createObjectFactory (refInfo, environment);
else
{
Object ref2 = refInfo;
if (refInfo instanceof Referenceable)
ref2 = ((Referenceable) refInfo).getReference ();
if (ref2 instanceof Reference)
{
Reference ref = (Reference) ref2;
String fClass = ref.getFactoryClassName ();
if (fClass != null)
{
Class k = Class.forName (fClass,
true,
Thread.currentThread().getContextClassLoader());
factory = (ObjectFactory) k.newInstance ();
}
else
{
Enumeration e = ref.getAll ();
while (e.hasMoreElements ())
{
RefAddr ra = (RefAddr) e.nextElement ();
if (ra instanceof StringRefAddr
&& "URL".equals (ra.getType ()))
{
factory
= (ObjectFactory) getURLContext (refInfo,
name,
nameCtx,
(String) ra.getContent (),
environment);
Object obj = factory.getObjectInstance (refInfo,
name,
nameCtx,
environment);
if (obj != null)
return obj;
}
}
factory = null;
}
}
if (factory == null)
{
StringTokenizer tokens = getPlusPath (Context.OBJECT_FACTORIES,
environment, nameCtx);
while (tokens.hasMoreTokens ())
{
String klassName = tokens.nextToken ();
Class k = Class.forName (klassName,
true,
Thread.currentThread().getContextClassLoader());
factory = (ObjectFactory) k.newInstance ();
Object obj = factory.getObjectInstance (refInfo, name,
nameCtx, environment);
if (obj != null)
return obj;
}
return refInfo;
}
}
if (factory == null)
return refInfo;
Object obj = factory.getObjectInstance (refInfo, name,
nameCtx, environment);
return obj == null ? refInfo : obj;
}
public static void setInitialContextFactoryBuilder (InitialContextFactoryBuilder builder)
throws NamingException
{
SecurityManager sm = System.getSecurityManager ();
if (sm != null)
sm.checkSetFactory ();
if (icfb != null)
throw new IllegalStateException ("builder already installed");
if (builder != null)
icfb = builder;
}
public static Context getContinuationContext (CannotProceedException cpe)
throws NamingException
{
Hashtable env = cpe.getEnvironment ();
if (env != null)
env.put (CPE, cpe);
try
{
Object obj = getObjectInstance (cpe.getResolvedObj(),
cpe.getAltName (),
cpe.getAltNameCtx (),
env);
if (obj != null)
return (Context) obj;
}
catch (Exception _)
{
}
cpe.fillInStackTrace();
throw cpe;
}
public static Object getStateToBind (Object obj, Name name,
Context nameCtx, Hashtable environment)
throws NamingException
{
StringTokenizer tokens = getPlusPath (Context.STATE_FACTORIES,
environment, nameCtx);
while (tokens.hasMoreTokens ())
{
String klassName = tokens.nextToken ();
try
{
Class k = Class.forName (klassName,
true,
Thread.currentThread().getContextClassLoader());
StateFactory factory = (StateFactory) k.newInstance ();
Object o = factory.getStateToBind (obj, name, nameCtx,
environment);
if (o != null)
return o;
}
catch (ClassNotFoundException _1)
{
}
catch (ClassCastException _2)
{
}
catch (InstantiationException _3)
{
}
catch (IllegalAccessException _4)
{
}
}
return obj;
}
}