Java example source code file (NamingContextImpl.java)
The NamingContextImpl.java Java example source code/*
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package com.sun.corba.se.impl.naming.cosnaming;
// Imports for Logging
import java.util.logging.Logger;
import java.util.logging.Level;
import com.sun.corba.se.impl.orbutil.LogKeywords;
// Import general CORBA classes
import org.omg.CORBA.Object;
import org.omg.CORBA.BAD_PARAM;
import org.omg.CORBA.INTERNAL;
import org.omg.CORBA.CompletionStatus;
import org.omg.PortableServer.POA;
import org.omg.PortableServer.Servant;
// Import org.omg.CosNaming classes
import org.omg.CosNaming.BindingType;
import org.omg.CosNaming.BindingTypeHolder;
import org.omg.CosNaming.BindingListHolder;
import org.omg.CosNaming.BindingIteratorHolder;
import org.omg.CosNaming.NameComponent;
import org.omg.CosNaming.NamingContextHelper;
import org.omg.CosNaming.NamingContext;
import org.omg.CosNaming.NamingContextPackage.*;
import org.omg.CosNaming._NamingContextImplBase;
import org.omg.CosNaming.NamingContextExtHelper;
import org.omg.CosNaming.NamingContextExt;
import org.omg.CosNaming.NamingContextExtPOA;
import org.omg.CosNaming.NamingContextExtPackage.*;
import org.omg.CosNaming.NamingContextPackage.NotFound;
import com.sun.corba.se.impl.naming.cosnaming.NamingContextDataStore;
import com.sun.corba.se.impl.naming.namingutil.INSURLHandler;
import com.sun.corba.se.spi.logging.CORBALogDomains;
import com.sun.corba.se.impl.logging.NamingSystemException ;
import com.sun.corba.se.spi.orb.ORB;
/**
* Class NamingContextImpl implements the org.omg.CosNaming::NamingContext
* interface, but does not implement the methods associated with
* maintaining the "table" of current bindings in a NamingContext.
* Instead, this implementation assumes that the derived implementation
* implements the NamingContextDataStore interface, which has the necessary
* methods. This allows multiple
* NamingContext implementations that differ in storage of the bindings,
* as well as implementations of interfaces derived from
* CosNaming::NamingContext that still reuses the implementation.
* <p>
* The operations bind(), rebind(), bind_context() and rebind_context()
* are all really implemented by doBind(). resolve() is really implemented
* by doResolve(), unbind() by doUnbind(). list(), new_context() and
* destroy() uses the NamingContextDataStore interface directly. All the
* doX() methods are public static.
* They synchronize on the NamingContextDataStore object.
* <p>
* An implementation a NamingContext must extend this class and implement
* the NamingContextDataStore interface with the operations:
* Bind(), Resolve(),
* Unbind(), List(), NewContext() and Destroy(). Calls
* to these methods are synchronized; these methods should
* therefore not be synchronized.
*/
public abstract class NamingContextImpl
extends NamingContextExtPOA
implements NamingContextDataStore
{
protected POA nsPOA;
private Logger readLogger, updateLogger, lifecycleLogger;
private NamingSystemException wrapper ;
private static NamingSystemException staticWrapper =
NamingSystemException.get( CORBALogDomains.NAMING_UPDATE ) ;
// The grammer for Parsing and Building Interoperable Stringified Names
// are implemented in this class
private InterOperableNamingImpl insImpl;
/**
* Create a naming context servant.
* Runs the super constructor.
* @param orb an ORB object.
* @exception java.lang.Exception a Java exception.
*/
public NamingContextImpl(ORB orb, POA poa) throws java.lang.Exception {
super();
this.orb = orb;
wrapper = NamingSystemException.get( orb,
CORBALogDomains.NAMING_UPDATE ) ;
insImpl = new InterOperableNamingImpl( );
this.nsPOA = poa;
readLogger = orb.getLogger( CORBALogDomains.NAMING_READ);
updateLogger = orb.getLogger( CORBALogDomains.NAMING_UPDATE);
lifecycleLogger = orb.getLogger(
CORBALogDomains.NAMING_LIFECYCLE);
}
public POA getNSPOA( ) {
return nsPOA;
}
/**
* Bind an object under a name in this NamingContext. If the name
* contains multiple (n) components, n-1 will be resolved in this
* NamingContext and the object bound in resulting NamingContext.
* An exception is thrown if a binding with the supplied name already
* exists. If the
* object to be bound is a NamingContext it will not participate in
* a recursive resolve.
* @param n a sequence of NameComponents which is the name under which
* the object will be bound.
* @param obj the object reference to be bound.
* @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.CosNaming.NamingContextPackage.AlreadyBound An object
* is already bound under the supplied name.
* @exception org.omg.CORBA.SystemException One of a fixed set of CORBA
* system exceptions.
* @see doBind
*/
public void bind(NameComponent[] n, org.omg.CORBA.Object obj)
throws org.omg.CosNaming.NamingContextPackage.NotFound,
org.omg.CosNaming.NamingContextPackage.CannotProceed,
org.omg.CosNaming.NamingContextPackage.InvalidName,
org.omg.CosNaming.NamingContextPackage.AlreadyBound
{
if( obj == null )
{
updateLogger.warning( LogKeywords.NAMING_BIND +
" unsuccessful because NULL Object cannot be Bound " );
throw wrapper.objectIsNull() ;
}
// doBind implements all four flavors of binding
NamingContextDataStore impl = (NamingContextDataStore)this;
doBind(impl,n,obj,false,BindingType.nobject);
if( updateLogger.isLoggable( Level.FINE ) ) {
// isLoggable call to make sure that we save some precious
// processor cycles, if there is no need to log.
updateLogger.fine( LogKeywords.NAMING_BIND_SUCCESS + " Name = " +
NamingUtils.getDirectoryStructuredName( n ) );
}
}
/**
* Bind a NamingContext under a name in this NamingContext. If the name
* contains multiple (n) components, n-1 will be resolved in this
* NamingContext and the object bound in resulting NamingContext.
* An exception is thrown if a binding with the supplied name already
* exists. The NamingContext will participate in recursive resolving.
* @param n a sequence of NameComponents which is the name under which
* the object will be bound.
* @param obj the NamingContect object reference to be bound.
* @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.CosNaming.NamingContextPackage.AlreadyBound An object
* is already bound under the supplied name.
* @exception org.omg.CORBA.SystemException One of a fixed set of CORBA
* system exceptions.
* @see doBind
*/
public void bind_context(NameComponent[] n, NamingContext nc)
throws org.omg.CosNaming.NamingContextPackage.NotFound,
org.omg.CosNaming.NamingContextPackage.CannotProceed,
org.omg.CosNaming.NamingContextPackage.InvalidName,
org.omg.CosNaming.NamingContextPackage.AlreadyBound
{
if( nc == null ) {
updateLogger.warning( LogKeywords.NAMING_BIND_FAILURE +
" NULL Context cannot be Bound " );
throw new BAD_PARAM( "Naming Context should not be null " );
}
// doBind implements all four flavors of binding
NamingContextDataStore impl = (NamingContextDataStore)this;
doBind(impl,n,nc,false,BindingType.ncontext);
if( updateLogger.isLoggable( Level.FINE ) ) {
// isLoggable call to make sure that we save some precious
// processor cycles, if there is no need to log.
updateLogger.fine( LogKeywords.NAMING_BIND_SUCCESS + " Name = " +
NamingUtils.getDirectoryStructuredName( n ) );
}
}
/**
* Bind an object under a name in this NamingContext. If the name
* contains multiple (n) components, n-1 will be resolved in this
* NamingContext and the object bound in resulting NamingContext.
* If a binding under the supplied name already exists it will be
* unbound first. If the
* object to be bound is a NamingContext it will not participate in
* a recursive resolve.
* @param n a sequence of NameComponents which is the name under which
* the object will be bound.
* @param obj the object reference to be bound.
* @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 doBind
*/
public void rebind(NameComponent[] n, org.omg.CORBA.Object obj)
throws org.omg.CosNaming.NamingContextPackage.NotFound,
org.omg.CosNaming.NamingContextPackage.CannotProceed,
org.omg.CosNaming.NamingContextPackage.InvalidName
{
if( obj == null )
{
updateLogger.warning( LogKeywords.NAMING_REBIND_FAILURE +
" NULL Object cannot be Bound " );
throw wrapper.objectIsNull() ;
}
try {
// doBind implements all four flavors of binding
NamingContextDataStore impl = (NamingContextDataStore)this;
doBind(impl,n,obj,true,BindingType.nobject);
} catch (org.omg.CosNaming.NamingContextPackage.AlreadyBound ex) {
updateLogger.warning( LogKeywords.NAMING_REBIND_FAILURE +
NamingUtils.getDirectoryStructuredName( n ) +
" is already bound to a Naming Context" );
// This should not happen
throw wrapper.namingCtxRebindAlreadyBound( ex ) ;
}
if( updateLogger.isLoggable( Level.FINE ) ) {
// isLoggable call to make sure that we save some precious
// processor cycles, if there is no need to log.
updateLogger.fine( LogKeywords.NAMING_REBIND_SUCCESS + " Name = " +
NamingUtils.getDirectoryStructuredName( n ) );
}
}
/**
* Bind a NamingContext under a name in this NamingContext. If the name
* contains multiple (n) components, the first n-1 components will be
* resolved in this NamingContext and the object bound in resulting
* NamingContext. If a binding under the supplied name already exists it
* will be unbound first. The NamingContext will participate in recursive
* resolving.
* @param n a sequence of NameComponents which is the name under which
* the object will be bound.
* @param obj the object reference to be bound.
* @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 doBind
*/
public void rebind_context(NameComponent[] n, NamingContext nc)
throws org.omg.CosNaming.NamingContextPackage.NotFound,
org.omg.CosNaming.NamingContextPackage.CannotProceed,
org.omg.CosNaming.NamingContextPackage.InvalidName
{
if( nc == null )
{
updateLogger.warning( LogKeywords.NAMING_REBIND_FAILURE +
" NULL Context cannot be Bound " );
throw wrapper.objectIsNull() ;
}
try {
// doBind implements all four flavors of binding
NamingContextDataStore impl = (NamingContextDataStore)this;
doBind(impl,n,nc,true,BindingType.ncontext);
} catch (org.omg.CosNaming.NamingContextPackage.AlreadyBound ex) {
// This should not happen
updateLogger.warning( LogKeywords.NAMING_REBIND_FAILURE +
NamingUtils.getDirectoryStructuredName( n ) +
" is already bound to a CORBA Object" );
throw wrapper.namingCtxRebindctxAlreadyBound( ex ) ;
}
if( updateLogger.isLoggable( Level.FINE ) ) {
// isLoggable call to make sure that we save some precious
// processor cycles, if there is no need to log.
updateLogger.fine( LogKeywords.NAMING_REBIND_SUCCESS + " Name = " +
NamingUtils.getDirectoryStructuredName( n ) );
}
}
/**
* Resolve a name in this NamingContext and return the object reference
* bound to the name. If the name contains multiple (n) components,
* the first component will be resolved in this NamingContext and the
* remaining components resolved in the resulting NamingContext, provided
* that the NamingContext bound to the first component of the name was
* bound with bind_context().
* @param n a sequence of NameComponents which is the name to be resolved.
* @return the object reference bound under the supplied name.
* @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 doResolve
*/
public org.omg.CORBA.Object resolve(NameComponent[] n)
throws org.omg.CosNaming.NamingContextPackage.NotFound,
org.omg.CosNaming.NamingContextPackage.CannotProceed,
org.omg.CosNaming.NamingContextPackage.InvalidName
{
// doResolve actually resolves
NamingContextDataStore impl = (NamingContextDataStore)this;
org.omg.CORBA.Object obj = doResolve(impl,n);
if( obj != null ) {
if( readLogger.isLoggable( Level.FINE ) ) {
readLogger.fine( LogKeywords.NAMING_RESOLVE_SUCCESS +
" Name: " + NamingUtils.getDirectoryStructuredName( n ) );
}
} else {
readLogger.warning( LogKeywords.NAMING_RESOLVE_FAILURE +
" Name: " + NamingUtils.getDirectoryStructuredName( n ) );
}
return obj;
}
/**
* Remove a binding from this NamingContext. If the name contains
* multiple (n) components, the first n-1 components will be resolved
* from this NamingContext and the final component unbound in
* the resulting NamingContext.
* @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 doUnbind
*/
public void unbind(NameComponent[] n)
throws org.omg.CosNaming.NamingContextPackage.NotFound,
org.omg.CosNaming.NamingContextPackage.CannotProceed,
org.omg.CosNaming.NamingContextPackage.InvalidName
{
// doUnbind actually unbinds
NamingContextDataStore impl = (NamingContextDataStore)this;
doUnbind(impl,n);
if( updateLogger.isLoggable( Level.FINE ) ) {
// isLoggable call to make sure that we save some precious
// processor cycles, if there is no need to log.
updateLogger.fine( LogKeywords.NAMING_UNBIND_SUCCESS +
" Name: " + NamingUtils.getDirectoryStructuredName( n ) );
}
}
/**
* List the contents of this NamingContest. A sequence of bindings
* is returned (a BindingList) containing up to the number of requested
* bindings, and a BindingIterator object reference is returned for
* iterating over the remaining bindings.
* @param how_many The number of requested bindings in the BindingList.
* @param bl The BindingList as an out parameter.
* @param bi The BindingIterator as an out parameter.
* @exception org.omg.CORBA.SystemException One of a fixed set of CORBA
* system exceptions.
* @see BindingListHolder
* @see BindingIteratorImpl
*/
public void list(int how_many, BindingListHolder bl,
BindingIteratorHolder bi)
{
// List actually generates the list
NamingContextDataStore impl = (NamingContextDataStore)this;
synchronized (impl) {
impl.List(how_many,bl,bi);
}
if( readLogger.isLoggable( Level.FINE ) && (bl.value != null )) {
// isLoggable call to make sure that we save some precious
// processor cycles, if there is no need to log.
readLogger.fine ( LogKeywords.NAMING_LIST_SUCCESS +
"list(" + how_many + ") -> bindings[" + bl.value.length +
"] + iterator: " + bi.value);
}
}
/**
* Create a NamingContext object and return its object reference.
* @return an object reference for a new NamingContext object implemented
* by this Name Server.
* @exception org.omg.CORBA.SystemException One of a fixed set of CORBA
* system exceptions.
*/
public synchronized NamingContext new_context()
{
// Create actually creates a new naming context
lifecycleLogger.fine( "Creating New Naming Context " );
NamingContextDataStore impl = (NamingContextDataStore)this;
synchronized (impl) {
NamingContext nctx = impl.NewContext();
if( nctx != null ) {
lifecycleLogger.fine( LogKeywords.LIFECYCLE_CREATE_SUCCESS );
} else {
// If naming context is null, then that must be a serious
// error.
lifecycleLogger.severe ( LogKeywords.LIFECYCLE_CREATE_FAILURE );
}
return nctx;
}
}
/**
* Create a new NamingContext, bind it in this Naming Context and return
* its object reference. This is equivalent to using new_context() followed
* by bind_context() with the supplied name and the object reference for
* the newly created NamingContext.
* @param n a sequence of NameComponents which is the name to be unbound.
* @return an object reference for a new NamingContext object implemented
* by this Name Server, bound to the supplied name.
* @exception org.omg.CosNaming.NamingContextPackage.AlreadyBound An object
* is already bound under the supplied name.
* @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 new_context
* @see bind_context
*/
public NamingContext bind_new_context(NameComponent[] n)
throws org.omg.CosNaming.NamingContextPackage.NotFound,
org.omg.CosNaming.NamingContextPackage.AlreadyBound,
org.omg.CosNaming.NamingContextPackage.CannotProceed,
org.omg.CosNaming.NamingContextPackage.InvalidName
{
NamingContext nc = null;
NamingContext rnc = null;
try {
if (debug)
dprint("bind_new_context " + nameToString(n));
// The obvious solution:
nc = this.new_context();
this.bind_context(n,nc);
rnc = nc;
nc = null;
} finally {
try {
if(nc != null)
nc.destroy();
} catch (org.omg.CosNaming.NamingContextPackage.NotEmpty e) {
}
}
if( updateLogger.isLoggable( Level.FINE ) ) {
// isLoggable call to make sure that we save some precious
// processor cycles, if there is no need to log.
updateLogger.fine ( LogKeywords.NAMING_BIND +
"New Context Bound To " +
NamingUtils.getDirectoryStructuredName( n ) );
}
return rnc;
}
/**
* Destroy this NamingContext object. If this NamingContext contains
* no bindings, the NamingContext is deleted.
* @exception org.omg.CosNaming.NamingContextPackage.NotEmpty This
* NamingContext is not empty (i.e., contains bindings).
* @exception org.omg.CORBA.SystemException One of a fixed set of CORBA
* system exceptions.
*/
public void destroy()
throws org.omg.CosNaming.NamingContextPackage.NotEmpty
{
lifecycleLogger.fine( "Destroying Naming Context " );
NamingContextDataStore impl = (NamingContextDataStore)this;
synchronized (impl) {
if (impl.IsEmpty() == true) {
// The context is empty so it can be destroyed
impl.Destroy();
lifecycleLogger.fine ( LogKeywords.LIFECYCLE_DESTROY_SUCCESS );
}
else {
// This context is not empty!
// Not a fatal error, warning should do.
lifecycleLogger.warning( LogKeywords.LIFECYCLE_DESTROY_FAILURE +
" NamingContext children are not destroyed still.." );
throw new NotEmpty();
}
}
}
/**
* Implements all four flavors of binding. It uses Resolve() to
* check if a binding already exists (for bind and bind_context), and
* unbind() to ensure that a binding does not already exist.
* If the length of the name is 1, then Bind() is called with
* the name and the object to bind. Otherwise, the first component
* of the name is resolved in this NamingContext and the appropriate
* form of bind 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 under which
* the object will be bound.
* @param obj the object reference to be bound.
* @param rebind Replace an existing binding or not.
* @param bt Type of binding (as object or as context).
* @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 first component 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.CosNaming.NamingContextPackage.AlreadyBound An object
* is already bound under the supplied name.
* @exception org.omg.CORBA.SystemException One of a fixed set of CORBA
* system exceptions.
* @see resolve
* @see unbind
* @see bind
* @see bind_context
* @see rebind
* @see rebind_context
*/
public static void doBind(NamingContextDataStore impl,
NameComponent[] n,
org.omg.CORBA.Object obj,
boolean rebind,
org.omg.CosNaming.BindingType bt)
throws org.omg.CosNaming.NamingContextPackage.NotFound,
org.omg.CosNaming.NamingContextPackage.CannotProceed,
org.omg.CosNaming.NamingContextPackage.InvalidName,
org.omg.CosNaming.NamingContextPackage.AlreadyBound
{
// Valid name?
if (n.length < 1)
throw new InvalidName();
// At bottom level?
if (n.length == 1) {
// The identifier must be set
if ( (n[0].id.length() == 0) && (n[0].kind.length() == 0 ) ) {
throw new InvalidName();
}
// Ensure synchronization of backend
synchronized (impl) {
// Yes: bind object in this context under the name
BindingTypeHolder bth = new BindingTypeHolder();
if (rebind) {
org.omg.CORBA.Object objRef = impl.Resolve( n[0], bth );
if( objRef != null ) {
// Refer Naming Service Doc:00-11-01 section 2.2.3.4
// If there is an object already bound with the name
// and the binding type is not ncontext a NotFound
// Exception with a reason of not a context has to be
// raised.
// Fix for bug Id: 4384628
if ( bth.value.value() == BindingType.nobject.value() ){
if ( bt.value() == BindingType.ncontext.value() ) {
throw new NotFound(
NotFoundReason.not_context, n);
}
} else {
// Previously a Context was bound and now trying to
// bind Object. It is invalid.
if ( bt.value() == BindingType.nobject.value() ) {
throw new NotFound(
NotFoundReason.not_object, n);
}
}
impl.Unbind(n[0]);
}
} else {
if (impl.Resolve(n[0],bth) != null)
// "Resistence is futile." [Borg pickup line]
throw new AlreadyBound();
}
// Now there are no other bindings under this name
impl.Bind(n[0],obj,bt);
}
} else {
// No: bind in a different context
NamingContext context = resolveFirstAsContext(impl,n);
// Compute tail
NameComponent[] tail = new NameComponent[n.length - 1];
System.arraycopy(n,1,tail,0,n.length-1);
// How should we propagate the bind
switch (bt.value()) {
case BindingType._nobject:
{
// Bind as object
if (rebind)
context.rebind(tail,obj);
else
context.bind(tail,obj);
}
break;
case BindingType._ncontext:
{
// Narrow to a naming context using Java casts. It must
// work.
NamingContext objContext = (NamingContext)obj;
// Bind as context
if (rebind)
context.rebind_context(tail,objContext);
else
context.bind_context(tail,objContext);
}
break;
default:
// This should not happen
throw staticWrapper.namingCtxBadBindingtype() ;
}
}
}
/**
* Implements resolving names in this NamingContext. The first component
* of the supplied name is resolved in this NamingContext by calling
* Resolve(). If there are no more components in the name, the
* resulting object reference is returned. Otherwise, the resulting object
* reference must have been bound as a context and be narrowable to
* a NamingContext. If this is the case, the remaining
* components of the name is resolved in 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 resolved.
* @return the object reference bound under the supplied name.
* @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 first component 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 org.omg.CORBA.Object doResolve(NamingContextDataStore impl,
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);
}
}
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