namingcontextimpl.java

java1.6众多例子参考

						 NameComponent[] n)
	throws org.omg.CosNaming.NamingContextPackage.NotFound,
	       org.omg.CosNaming.NamingContextPackage.CannotProceed,
	       org.omg.CosNaming.NamingContextPackage.InvalidName
    {
	org.omg.CORBA.Object obj = null;
	BindingTypeHolder bth = new BindingTypeHolder();
    
            
	// Length must be greater than 0
	if (n.length < 1)
	    throw new InvalidName();

	// The identifier must be set
	if (n.length == 1) {
	    synchronized (impl) {
		// Resolve first level in this context
		obj = impl.Resolve(n[0],bth);
	    }
	    if (obj == null) {
		// Object was not found
		throw new NotFound(NotFoundReason.missing_node,n);
	    }
	    return obj;
	} else {
	    // n.length > 1
	    if ( (n[1].id.length() == 0) && (n[1].kind.length() == 0) ) {
		throw new InvalidName();
            }

	    NamingContext context = resolveFirstAsContext(impl,n);
      
	    // Compute restOfName = name[1..length]
	    NameComponent[] tail = new NameComponent[n.length -1];
	    System.arraycopy(n,1,tail,0,n.length-1);

            // Resolve rest of name in context
            try {
                // First try to resolve using the local call, this should work
                // most of the time unless there are federated naming contexts.
                Servant servant = impl.getNSPOA().reference_to_servant( 
                    context );
                return doResolve(((NamingContextDataStore)servant), tail) ;
            } catch( Exception e ) {
                return context.resolve(tail);
            }
        }
    }

    /**
   * Implements unbinding bound names in this NamingContext. If the
   * name contains only one component, the name is unbound in this
   * NamingContext using Unbind(). Otherwise, the first component
   * of the name is resolved in this NamingContext and 
   * unbind passed to the resulting NamingContext.
   * This method is static for maximal reuse - even for extended naming
   * context implementations where the recursive semantics still apply.
   * @param impl an implementation of NamingContextDataStore
   * @param n a sequence of NameComponents which is the name to be unbound.
   * @exception org.omg.CosNaming.NamingContextPackage.NotFound A name with multiple
   * components was supplied, but the first component could not be
   * resolved.
   * @exception org.omg.CosNaming.NamingContextPackage.CannotProceed Could not proceed
   * in resolving the n-1 components of the supplied name.
   * @exception org.omg.CosNaming.NamingContextPackage.InvalidName The supplied name
   * is invalid (i.e., has length less than 1).   
   * @exception org.omg.CORBA.SystemException One of a fixed set of CORBA system exceptions.
   * @see resolve
   */
    public static void doUnbind(NamingContextDataStore impl,
				NameComponent[] n)
	throws org.omg.CosNaming.NamingContextPackage.NotFound,
	       org.omg.CosNaming.NamingContextPackage.CannotProceed,
	       org.omg.CosNaming.NamingContextPackage.InvalidName
    {
	// Name valid?
	if (n.length < 1)
	    throw new InvalidName();

    // Unbind here?
	if (n.length == 1) {
	    // The identifier must be set
	    if ( (n[0].id.length() == 0) && (n[0].kind.length() == 0 ) ) {
		throw new InvalidName();
            }

	    org.omg.CORBA.Object objRef = null;
	    synchronized (impl) {
		// Yes: unbind in this context
		objRef = impl.Unbind(n[0]);
	    }
      
	    if (objRef == null)
		// It was not bound
		throw new NotFound(NotFoundReason.missing_node,n);
	    // Done
	    return;
	} else {
	    // No: unbind in a different context
      
      // Resolve first  - must be resolveable
	    NamingContext context = resolveFirstAsContext(impl,n);
      
	    // Compute tail
	    NameComponent[] tail = new NameComponent[n.length - 1];
	    System.arraycopy(n,1,tail,0,n.length-1);

      // Propagate unbind to this context
	    context.unbind(tail);
	}
    }

    /**
   * Implements resolving a NameComponent in this context and
   * narrowing it to CosNaming::NamingContext. It will throw appropriate
   * exceptions if not found or not narrowable.
   * @param impl an implementation of NamingContextDataStore
   * @param n a NameComponents which is the name to be found.
   * @exception org.omg.CosNaming.NamingContextPackage.NotFound The
   * first component could not be resolved.
   * @exception org.omg.CosNaming.NamingContextPackage.CannotProceed Could not proceed
   * in resolving the first component of the supplied name.
   * @exception org.omg.CORBA.SystemException One of a fixed set of CORBA system exceptions.
   * @see resolve
   */
    protected static NamingContext resolveFirstAsContext(NamingContextDataStore impl,
							 NameComponent[] n)
	throws org.omg.CosNaming.NamingContextPackage.NotFound {
	org.omg.CORBA.Object topRef = null;
	BindingTypeHolder bth = new BindingTypeHolder();
	NamingContext context = null;
    
	synchronized (impl) {
	    // Resolve first  - must be resolveable
	    topRef = impl.Resolve(n[0],bth);
	    if (topRef == null) {
		// It was not bound
		throw new NotFound(NotFoundReason.missing_node,n);
	    }
	}
      
	// Was it bound as a context?
	if (bth.value != BindingType.ncontext) {
	    // It was not a context
	    throw new NotFound(NotFoundReason.not_context,n);
	}
      
	// Narrow to a naming context
	try {
	    context = NamingContextHelper.narrow(topRef);
	} catch (org.omg.CORBA.BAD_PARAM ex) {
	    // It was not a context
	    throw new NotFound(NotFoundReason.not_context,n);
	}

	// Hmm. must be ok
	return context;
    }


   /**
    * This operation creates a stringified name from the array of Name
    * components.
    * @param n Name of the object <p>
    * @exception org.omg.CosNaming.NamingContextExtPackage.InvalidName
    * Indicates the name does not identify a binding.<p>
    *
    */
    public String to_string(org.omg.CosNaming.NameComponent[] n)
	 throws org.omg.CosNaming.NamingContextPackage.InvalidName
    {
	// Name valid?
	if ( (n == null ) || (n.length == 0) )
	{
		throw new InvalidName();
	}
	NamingContextDataStore impl = (NamingContextDataStore)this;

        String theStringifiedName = insImpl.convertToString( n );

	if( theStringifiedName == null )
	{
		throw new InvalidName();
	}
	
	return theStringifiedName;
    }


   /**
    * This operation  converts a Stringified Name into an  equivalent array
    * of Name Components.
    * @param sn Stringified Name of the object <p>
    * @exception org.omg.CosNaming.NamingContextExtPackage.InvalidName
    * Indicates the name does not identify a binding.<p>
    *
    */
    public org.omg.CosNaming.NameComponent[] to_name(String sn)
	 throws org.omg.CosNaming.NamingContextPackage.InvalidName
    {
	// Name valid?
	if  ( (sn == null ) || (sn.length() == 0) )
	{
		throw new InvalidName();
	}
	NamingContextDataStore impl = (NamingContextDataStore)this;
	org.omg.CosNaming.NameComponent[] theNameComponents =
		insImpl.convertToNameComponent( sn );
	if( ( theNameComponents == null ) || (theNameComponents.length == 0 ) )
	{
		throw new InvalidName();
	}
        for( int i = 0; i < theNameComponents.length; i++ ) {
            // If there is a name component whose id and kind null or
            // zero length string, then an invalid name exception needs to be
            // raised.
            if ( ( ( theNameComponents[i].id  == null ) 
                 ||( theNameComponents[i].id.length() == 0 ) )
               &&( ( theNameComponents[i].kind == null )
                 ||( theNameComponents[i].kind.length() == 0 ) ) ) {
                throw new InvalidName();
            }       
        }
	return theNameComponents;
    }

   /**
    * This operation creates a URL based "iiopname://" format name
    * from the Stringified Name of the object.
    * @param addr internet based address of the host machine where  
    * Name Service is running <p>
    * @param sn Stringified Name of the object <p>
    * @exception org.omg.CosNaming.NamingContextExtPackage.InvalidName
    * Indicates the name does not identify a binding.<p>
    * @exception org.omg.CosNaming.NamingContextPackage.InvalidAddress
    * Indicates the internet based address of the host machine is
    * incorrect <p>
    *
    */ 

    public String to_url(String addr, String sn)
        throws org.omg.CosNaming.NamingContextExtPackage.InvalidAddress, 
               org.omg.CosNaming.NamingContextPackage.InvalidName
    {
	// Name valid?
	if  ( (sn == null ) || (sn.length() == 0) )
	{
	    throw new InvalidName();
	}
	if( addr == null )
	{
	    throw new 
                org.omg.CosNaming.NamingContextExtPackage.InvalidAddress();
	}
	NamingContextDataStore impl = (NamingContextDataStore)this;
	String urlBasedAddress = null;
	urlBasedAddress = insImpl.createURLBasedAddress( addr, sn ); 
        // Extra check to see that corba name url created is valid as per
        // INS spec grammer.
        try {
            INSURLHandler.getINSURLHandler( ).parseURL( urlBasedAddress );
        } catch( BAD_PARAM e ) {
            throw new 
                org.omg.CosNaming.NamingContextExtPackage.InvalidAddress();
        }
	return urlBasedAddress;
    }

    /**
     * This operation resolves the Stringified name into the object
     * reference.
     * @param sn Stringified Name of the object <p>
     * @exception org.omg.CosNaming.NamingContextPackage.NotFound
     * Indicates there is no object reference for the given name. <p>
     * @exception org.omg.CosNaming.NamingContextPackage.CannotProceed
     * Indicates that the given compound name is incorrect <p>
     * @exception org.omg.CosNaming.NamingContextExtPackage.InvalidName
     * Indicates the name does not identify a binding.<p>
     * @exception org.omg.CosNaming.NamingContextPackage.AlreadyBound
     * Indicates the name is already bound.<p>
     *
     */
    public org.omg.CORBA.Object resolve_str(String sn)
        throws org.omg.CosNaming.NamingContextPackage.NotFound, 
               org.omg.CosNaming.NamingContextPackage.CannotProceed, 
               org.omg.CosNaming.NamingContextPackage.InvalidName
    {
	org.omg.CORBA.Object theObject = null;
	// Name valid?
	if  ( (sn == null ) || (sn.length() == 0) )
	{
		throw new InvalidName();
	}
	NamingContextDataStore impl = (NamingContextDataStore)this;
	org.omg.CosNaming.NameComponent[] theNameComponents =
		insImpl.convertToNameComponent( sn );

	if( ( theNameComponents == null ) || (theNameComponents.length == 0 ) )
	{
		throw new InvalidName();
	}
	theObject = resolve( theNameComponents );
	return theObject;
    }


    transient protected ORB orb;
  
    public static String nameToString(NameComponent[] name)
    {
	StringBuffer s = new StringBuffer("{");
	if (name != null || name.length > 0) {
	    for (int i=0;i<name.length;i++) {
		if (i>0)
		    s.append(",");
		s.append("[").
		    append(name[i].id).
		    append(",").
		    append(name[i].kind).
		    append("]");
	    }
	}
	s.append("}");
	return s.toString();
    }  

    // Debugging aids.
    public static final boolean debug = false;

    private static void dprint(String msg) {
	NamingUtils.dprint("NamingContextImpl("  +
			   Thread.currentThread().getName() + " at " +
			   System.currentTimeMillis() +
			   " ems): " + msg);
    }
}