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Licensed to the Apache Software Foundation (ASF) under one or more contributor license agreements. See the NOTICE file distributed with this work for additional information regarding copyright ownership. The ASF licenses this file to you under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at http://www.apache.org/licenses/LICENSE-2.0 Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.
 
 package org.apache.marmotta.platform.core.jndi;
 
 import javax.naming.*;
 
 import java.util.*;

Add file description here!

Author: Sebastian Schaffert

 
 public class MarmottaContext implements Context {
 
     private Hashtable<ObjectObject>      environment;
 
     private HashMap<Name,Objectbindings;
 
     private HashMap<String,ObjectFactoryfactories;
 
     private static Properties parseProperties = new Properties();
     static {
         .put("jndi.syntax.direction","left_to_right");
         .put("jndi.syntax.separator","/");
     }
 
     public MarmottaContext(Hashtable<ObjectObjectenvironment) {
         this. = environment;
 
         this.  = new HashMap<NameObject>();
         this. = new HashMap<StringObjectFactory>();
     }
 
         if(.containsKey(className))
             return .get(className);
         else {
             ObjectFactory factory = (ObjectFactory) Class.forName(className).newInstance();
             .put(className,factory);
             return factory;
         }
     }

    
Retrieves the named object. If name is empty, returns a new instance of this context (which represents the same naming context as this context, but its environment may be modified independently and it may be accessed concurrently).

Parameters:
name the name of the object to look up
Returns:
the object bound to name
Throws:
javax.naming.NamingException if a naming exception is encountered
See also:
lookup(java.lang.String)
lookupLink(javax.naming.Name)
 
     @Override
     public Object lookup(Name namethrows NamingException {
         if(name.size() == 0) {
             // clone current context
             MarmottaContext clone = new MarmottaContext(new Hashtable<ObjectObject>(this.));
             clone.bindings = new HashMap<NameObject>(this.);
             return clone;
         } else if(name.size() > 1) {
             // look in subcontexts
             if(.containsKey(name.getPrefix(1))) {
                 Object subcontext = .get(name.getPrefix(1));
                 if(subcontext instanceof Contextreturn ((Contextsubcontext).lookup(name.getSuffix(1));
                 else
                     throw new NotContextException("the name "+name.getPrefix(1)+" does not identify a context");
             } else
                 throw new NameNotFoundException("the name "+name.getPrefix(1)+" is not bound");
 
         } else if(.containsKey(name)) {
             Object value = .get(name);
             try {
                 if(value instanceof Reference) {
                     ObjectFactory factory = getObjectFactory(((Referencevalue).getFactoryClassName());
                     return factory.getObjectInstance(null,name,this,);
                 } else if(value instanceof Referenceable) {
                     ObjectFactory factory = getObjectFactory(((Referenceablevalue).getReference().getFactoryClassName());
                     return factory.getObjectInstance(null,name,this,);
                } else
                    return value;
            } catch(Exception ex) {
                throw new NamingException("could not create object: "+ex.getMessage());
            }
        } else
            throw new NameNotFoundException("name "+name+" could not be found");
    }

    
Retrieves the named object. See lookup(javax.naming.Name) for details.

Parameters:
name the name of the object to look up
Returns:
the object bound to name
Throws:
javax.naming.NamingException if a naming exception is encountered
    @Override
    public Object lookup(String namethrows NamingException {
        return lookup(new CompoundName(name,));
    }

    
Binds a name to an object. All intermediate contexts and the target context (that named by all but terminal atomic component of the name) must already exist.

Parameters:
name the name to bind; may not be empty
obj the object to bind; possibly null
Throws:
javax.naming.NameAlreadyBoundException if name is already bound
javax.naming.directory.InvalidAttributesException if object did not supply all mandatory attributes
javax.naming.NamingException if a naming exception is encountered
See also:
bind(java.lang.String,java.lang.Object)
rebind(javax.naming.Name,java.lang.Object)
javax.naming.directory.DirContext.bind(javax.naming.Name,java.lang.Object,javax.naming.directory.Attributes)
    @Override
    public void bind(Name nameObject objthrows NamingException {
        if(name.size() == 0)
            throw new InvalidNameException("the name passed to bind() is not valid");
        else if(name.size() > 1) {
            // we try getting the subcontext with the given name if it exists or create a new one if it does not
            // exist, and then pass over to the subcontext's bind() operation
            // look in subcontexts
            if(.containsKey(name.getPrefix(1))) {
                Object subcontext = .get(name.getPrefix(1));
                if(subcontext instanceof Context) {
                    ((Contextsubcontext).bind(name.getSuffix(1),obj);
                } else
                    throw new NotContextException("the name "+name.getPrefix(1)+" does not identify a context");
            } else {
                Context subcontext = createSubcontext(name.getPrefix(1));
                subcontext.bind(name.getSuffix(1),obj);
            }
        } else if(.containsKey(name))
            throw new NameAlreadyBoundException("name "+name+" is already bound in this context");
        else {
            .put(name,obj);
        }
    }

    
Binds a name to an object. See bind(javax.naming.Name,java.lang.Object) for details.

Parameters:
name the name to bind; may not be empty
obj the object to bind; possibly null
Throws:
javax.naming.NameAlreadyBoundException if name is already bound
javax.naming.directory.InvalidAttributesException if object did not supply all mandatory attributes
javax.naming.NamingException if a naming exception is encountered
    @Override
    public void bind(String nameObject objthrows NamingException {
        bind(new CompoundName(name,),obj);
    }

    
Binds a name to an object, overwriting any existing binding. All intermediate contexts and the target context (that named by all but terminal atomic component of the name) must already exist.

If the object is a DirContext, any existing attributes associated with the name are replaced with those of the object. Otherwise, any existing attributes associated with the name remain unchanged.

    @Override
    public void rebind(Name nameObject objthrows NamingException {
        if(name.size() == 0)
            throw new InvalidNameException("the name passed to bind() is not valid");
        else if(name.size() > 1) {
            // we try getting the subcontext with the given name if it exists or create a new one if it does not
            // exist, and then pass over to the subcontext's bind() operation
            // look in subcontexts
            if(.containsKey(name.getPrefix(1))) {
                Object subcontext = .get(name.getPrefix(1));
                if(subcontext instanceof Context) {
                    ((Contextsubcontext).bind(name.getSuffix(1),obj);
                } else
                    throw new NotContextException("the name "+name.getPrefix(1)+" does not identify a context");
            } else {
                Context subcontext = createSubcontext(name.getPrefix(1));
                subcontext.bind(name.getSuffix(1),obj);
            }
        } else {
            .put(name,obj);
        }
    }

    
Binds a name to an object, overwriting any existing binding. See rebind(javax.naming.Name,java.lang.Object) for details.

Parameters:
name the name to bind; may not be empty
obj the object to bind; possibly null
Throws:
javax.naming.directory.InvalidAttributesException if object did not supply all mandatory attributes
javax.naming.NamingException if a naming exception is encountered
    @Override
    public void rebind(String nameObject objthrows NamingException {
        rebind(new CompoundName(name,),obj);
    }

    
Unbinds the named object. Removes the terminal atomic name in name from the target context--that named by all but the terminal atomic part of name.

This method is idempotent. It succeeds even if the terminal atomic name is not bound in the target context, but throws NameNotFoundException if any of the intermediate contexts do not exist.

Any attributes associated with the name are removed. Intermediate contexts are not changed.

Parameters:
name the name to unbind; may not be empty
Throws:
javax.naming.NameNotFoundException if an intermediate context does not exist
javax.naming.NamingException if a naming exception is encountered
See also:
unbind(java.lang.String)
    @Override
    public void unbind(Name namethrows NamingException {
        if(name.size() == 0)
            throw new InvalidNameException("an empty name cannot be unbound");
        else if(name.size() > 1) {
            // look in subcontexts
            if(.containsKey(name.getPrefix(1))) {
                Object subcontext = .get(name.getPrefix(1));
                if(subcontext instanceof Context) {
                    ((Contextsubcontext).unbind(name.getSuffix(1));
                } else
                    throw new NotContextException("the name "+name.getPrefix(1)+" does not identify a context");
            } else
                throw new NameNotFoundException("the name "+name.getPrefix(1)+" is not bound");
        } else {
            .remove(name);
        }
    }

    
Unbinds the named object. See unbind(javax.naming.Name) for details.

Parameters:
name the name to unbind; may not be empty
Throws:
javax.naming.NameNotFoundException if an intermediate context does not exist
javax.naming.NamingException if a naming exception is encountered
    @Override
    public void unbind(String namethrows NamingException {
        unbind(new CompoundName(name,));
    }

    
Binds a new name to the object bound to an old name, and unbinds the old name. Both names are relative to this context. Any attributes associated with the old name become associated with the new name. Intermediate contexts of the old name are not changed.

Parameters:
oldName the name of the existing binding; may not be empty
newName the name of the new binding; may not be empty
Throws:
javax.naming.NameAlreadyBoundException if newName is already bound
javax.naming.NamingException if a naming exception is encountered
See also:
rename(java.lang.String,java.lang.String)
bind(javax.naming.Name,java.lang.Object)
rebind(javax.naming.Name,java.lang.Object)
    @Override
    public void rename(Name oldNameName newNamethrows NamingException {
        /* Confirm that this works.  We might have to catch the exception */
        Object old = lookup(oldName);
        if(newName.isEmpty()) throw new InvalidNameException("Cannot bind to empty name");
        if(old == nullthrow new NamingException("Name '" + oldName + "' not found.");
        /* If the new name is bound throw a NameAlreadyBoundException */
        if(lookup(newName) != nullthrow new NameAlreadyBoundException("Name '" + newName + "' already bound");
        unbind(oldName);
        unbind(newName);
        bind(newNameold);
    }

    
Binds a new name to the object bound to an old name, and unbinds the old name. See rename(javax.naming.Name,javax.naming.Name) for details.

Parameters:
oldName the name of the existing binding; may not be empty
newName the name of the new binding; may not be empty
Throws:
javax.naming.NameAlreadyBoundException if newName is already bound
javax.naming.NamingException if a naming exception is encountered
    @Override
    public void rename(String oldNameString newNamethrows NamingException {
        rename(new CompoundName(oldName,),new CompoundName(newName,));
    }

    
Enumerates the names bound in the named context, along with the class names of objects bound to them. The contents of any subcontexts are not included.

If a binding is added to or removed from this context, its effect on an enumeration previously returned is undefined.

Parameters:
name the name of the context to list
Returns:
an enumeration of the names and class names of the bindings in this context. Each element of the enumeration is of type NameClassPair.
Throws:
javax.naming.NamingException if a naming exception is encountered
See also:
list(java.lang.String)
listBindings(javax.naming.Name)
javax.naming.NameClassPair
    @Override
    public NamingEnumeration<NameClassPairlist(Name namethrows NamingException {
        if(name == null || name.size() == 0)
            return new NameClassEnumerationImpl(this.);
        else {
            Object subcontext = .get(name.getPrefix(1));
            if(subcontext == null)
                throw new NameNotFoundException("subcontext with name "+name.getPrefix(1)+" does not exist");
            else if(subcontext instanceof Contextreturn ((Contextsubcontext).list(name.getSuffix(1));
            else
                throw new NotContextException("object with name "+name.getPrefix(1)+" is not a context");
        }
    }

    
Enumerates the names bound in the named context, along with the class names of objects bound to them. See list(javax.naming.Name) for details.

Parameters:
name the name of the context to list
Returns:
an enumeration of the names and class names of the bindings in this context. Each element of the enumeration is of type NameClassPair.
Throws:
javax.naming.NamingException if a naming exception is encountered
    @Override
    public NamingEnumeration<NameClassPairlist(String namethrows NamingException {
        return list(new CompoundName(name,));
    }

    
Enumerates the names bound in the named context, along with the objects bound to them. The contents of any subcontexts are not included.

If a binding is added to or removed from this context, its effect on an enumeration previously returned is undefined.

Parameters:
name the name of the context to list
Returns:
an enumeration of the bindings in this context. Each element of the enumeration is of type Binding.
Throws:
javax.naming.NamingException if a naming exception is encountered
See also:
listBindings(java.lang.String)
list(javax.naming.Name)
javax.naming.Binding
    @Override
    public NamingEnumeration<BindinglistBindings(Name namethrows NamingException {
        if(name == null || name.size() == 0)
            return new BindingEnumerationImpl(this.);
        else {
            Object subcontext = .get(name.getPrefix(1));
            if(subcontext == null)
                throw new NameNotFoundException("subcontext with name "+name.getPrefix(1)+" does not exist");
            else if(subcontext instanceof Contextreturn ((Contextsubcontext).listBindings(name.getSuffix(1));
            else
                throw new NotContextException("object with name "+name.getPrefix(1)+" is not a context");
        }
    }

    
Enumerates the names bound in the named context, along with the objects bound to them. See listBindings(javax.naming.Name) for details.

Parameters:
name the name of the context to list
Returns:
an enumeration of the bindings in this context. Each element of the enumeration is of type Binding.
Throws:
javax.naming.NamingException if a naming exception is encountered
    @Override
    public NamingEnumeration<BindinglistBindings(String namethrows NamingException {
        return listBindings(new CompoundName(name));
    }

    
Destroys the named context and removes it from the namespace. Any attributes associated with the name are also removed. Intermediate contexts are not destroyed.

This method is idempotent. It succeeds even if the terminal atomic name is not bound in the target context, but throws NameNotFoundException if any of the intermediate contexts do not exist.

In a federated naming system, a context from one naming system may be bound to a name in another. One can subsequently look up and perform operations on the foreign context using a composite name. However, an attempt destroy the context using this composite name will fail with NotContextException, because the foreign context is not a "subcontext" of the context in which it is bound. Instead, use unbind() to remove the binding of the foreign context. Destroying the foreign context requires that the destroySubcontext() be performed on a context from the foreign context's "native" naming system.

Parameters:
name the name of the context to be destroyed; may not be empty
Throws:
javax.naming.NameNotFoundException if an intermediate context does not exist
javax.naming.NotContextException if the name is bound but does not name a context, or does not name a context of the appropriate type
javax.naming.ContextNotEmptyException if the named context is not empty
javax.naming.NamingException if a naming exception is encountered
See also:
destroySubcontext(java.lang.String)
    @Override
    public void destroySubcontext(Name namethrows NamingException {
        unbind(name);
    }

    
Destroys the named context and removes it from the namespace. See destroySubcontext(javax.naming.Name) for details.

Parameters:
name the name of the context to be destroyed; may not be empty
Throws:
javax.naming.NameNotFoundException if an intermediate context does not exist
javax.naming.NotContextException if the name is bound but does not name a context, or does not name a context of the appropriate type
javax.naming.ContextNotEmptyException if the named context is not empty
javax.naming.NamingException if a naming exception is encountered
    @Override
    public void destroySubcontext(String namethrows NamingException {
        unbind(name);
    }

    
Creates and binds a new context. Creates a new context with the given name and binds it in the target context (that named by all but terminal atomic component of the name). All intermediate contexts and the target context must already exist.

Parameters:
name the name of the context to create; may not be empty
Returns:
the newly created context
Throws:
javax.naming.NameAlreadyBoundException if name is already bound
javax.naming.directory.InvalidAttributesException if creation of the subcontext requires specification of mandatory attributes
javax.naming.NamingException if a naming exception is encountered
See also:
createSubcontext(java.lang.String)
javax.naming.Context.createSubcontext(javax.naming.Name)
    @Override
    public Context createSubcontext(Name namethrows NamingException {
        MarmottaContext subcontext = new MarmottaContext(new Hashtable<ObjectObject>(this.));
        bind(name,subcontext);
        return subcontext;
    }

    
Creates and binds a new context. See createSubcontext(javax.naming.Name) for details.

Parameters:
name the name of the context to create; may not be empty
Returns:
the newly created context
Throws:
javax.naming.NameAlreadyBoundException if name is already bound
javax.naming.directory.InvalidAttributesException if creation of the subcontext requires specification of mandatory attributes
javax.naming.NamingException if a naming exception is encountered
    @Override
    public Context createSubcontext(String namethrows NamingException {
        return createSubcontext(new CompoundName(name));
    }

    
Retrieves the named object, following links except for the terminal atomic component of the name. If the object bound to name is not a link, returns the object itself.

Parameters:
name the name of the object to look up
Returns:
the object bound to name, not following the terminal link (if any).
Throws:
javax.naming.NamingException if a naming exception is encountered
See also:
lookupLink(java.lang.String)
    @Override
    public Object lookupLink(Name namethrows NamingException {
        return lookup(name);
    }

    
Retrieves the named object, following links except for the terminal atomic component of the name. See lookupLink(javax.naming.Name) for details.

Parameters:
name the name of the object to look up
Returns:
the object bound to name, not following the terminal link (if any)
Throws:
javax.naming.NamingException if a naming exception is encountered
    @Override
    public Object lookupLink(String namethrows NamingException {
        return lookup(name);
    }

    
Retrieves the parser associated with the named context. In a federation of namespaces, different naming systems will parse names differently. This method allows an application to get a parser for parsing names into their atomic components using the naming convention of a particular naming system. Within any single naming system, NameParser objects returned by this method must be equal (using the equals() test).

Parameters:
name the name of the context from which to get the parser
Returns:
a name parser that can parse compound names into their atomic components
Throws:
javax.naming.NamingException if a naming exception is encountered
See also:
getNameParser(java.lang.String)
javax.naming.CompoundName
    @Override
    public NameParser getNameParser(Name namethrows NamingException {
        return new LMFNameParser();
    }

    
Retrieves the parser associated with the named context. See getNameParser(javax.naming.Name) for details.

Parameters:
name the name of the context from which to get the parser
Returns:
a name parser that can parse compound names into their atomic components
Throws:
javax.naming.NamingException if a naming exception is encountered
    @Override
    public NameParser getNameParser(String namethrows NamingException {
        return new LMFNameParser();
    }

    
Composes the name of this context with a name relative to this context. Given a name (name) relative to this context, and the name (prefix) of this context relative to one of its ancestors, this method returns the composition of the two names using the syntax appropriate for the naming system(s) involved. That is, if name names an object relative to this context, the result is the name of the same object, but relative to the ancestor context. None of the names may be null.

For example, if this context is named "wiz.com" relative to the initial context, then

  composeName("east", "wiz.com") 
might return "east.wiz.com". If instead this context is named "org/research", then
  composeName("user/jane", "org/research") 
might return "org/research/user/jane" while
  composeName("user/jane", "research") 
returns "research/user/jane".

Parameters:
name a name relative to this context
prefix the name of this context relative to one of its ancestors
Returns:
the composition of prefix and name
Throws:
javax.naming.NamingException if a naming exception is encountered
See also:
composeName(java.lang.String,java.lang.String)
    @Override
    public Name composeName(Name nameName prefixthrows NamingException {
        Name retName = (Name)prefix.clone();
        retName.addAll(name);
        return retName;
    }

    
Composes the name of this context with a name relative to this context. See composeName(javax.naming.Name,javax.naming.Name) for details.

Parameters:
name a name relative to this context
prefix the name of this context relative to one of its ancestors
Returns:
the composition of prefix and name
Throws:
javax.naming.NamingException if a naming exception is encountered
    @Override
    public String composeName(String nameString prefixthrows NamingException {
        return composeName(new CompoundName(name,), new CompoundName(prefix,)).toString();
    }

    
Adds a new environment property to the environment of this context. If the property already exists, its value is overwritten. See class description for more details on environment properties.

Parameters:
propName the name of the environment property to add; may not be null
propVal the value of the property to add; may not be null
Returns:
the previous value of the property, or null if the property was not in the environment before
Throws:
javax.naming.NamingException if a naming exception is encountered
See also:
getEnvironment()
removeFromEnvironment(java.lang.String)
    @Override
    public Object addToEnvironment(String propNameObject propValthrows NamingException {
        return .put(propName,propVal);
    }

    
Removes an environment property from the environment of this context. See class description for more details on environment properties.

Parameters:
propName the name of the environment property to remove; may not be null
Returns:
the previous value of the property, or null if the property was not in the environment
Throws:
javax.naming.NamingException if a naming exception is encountered
See also:
getEnvironment()
addToEnvironment(java.lang.String,java.lang.Object)
    @Override
    public Object removeFromEnvironment(String propNamethrows NamingException {
        return .remove(propName);
    }

    
Retrieves the environment in effect for this context. See class description for more details on environment properties.

The caller should not make any changes to the object returned: their effect on the context is undefined. The environment of this context may be changed using addToEnvironment() and removeFromEnvironment().

Returns:
the environment of this context; never null
Throws:
javax.naming.NamingException if a naming exception is encountered
See also:
addToEnvironment(java.lang.String,java.lang.Object)
removeFromEnvironment(java.lang.String)
    @Override
    public Hashtable<?, ?> getEnvironment() throws NamingException {
        return new Hashtable<ObjectObject>();
    }

    
Closes this context. This method releases this context's resources immediately, instead of waiting for them to be released automatically by the garbage collector.

This method is idempotent: invoking it on a context that has already been closed has no effect. Invoking any other method on a closed context is not allowed, and results in undefined behaviour.

Throws:
javax.naming.NamingException if a naming exception is encountered
    @Override
    public void close() throws NamingException {
    }

    
Retrieves the full name of this context within its own namespace.

Many naming services have a notion of a "full name" for objects in their respective namespaces. For example, an LDAP entry has a distinguished name, and a DNS record has a fully qualified name. This method allows the client application to retrieve this name. The string returned by this method is not a JNDI composite name and should not be passed directly to context methods. In naming systems for which the notion of full name does not make sense, OperationNotSupportedException is thrown.

Returns:
this context's name in its own namespace; never null
Throws:
javax.naming.OperationNotSupportedException if the naming system does not have the notion of a full name
javax.naming.NamingException if a naming exception is encountered
Since:
1.3
    @Override
    public String getNameInNamespace() throws NamingException {
        throw new OperationNotSupportedException("no fullname support");
    }
    private static class NameClassEnumerationImpl implements NamingEnumeration<NameClassPair> {
        Iterator<Map.Entry<Name,Object>> iterator;
        private NameClassEnumerationImpl(Map<NameObjectnames) {
             = names.entrySet().iterator();
        }
        @Override
        public NameClassPair next() throws NamingException {
            Map.Entry<Name,Objectelement = .next();
            return new NameClassPair(element.getKey().toString(),element.getValue().getClass().getName());
        }
        @Override
        public boolean hasMore() throws NamingException {
            return .hasNext();
        }
        @Override
        public void close() throws NamingException {
        }
        @Override
        public boolean hasMoreElements() {
            return .hasNext();
        }
        @Override
        public NameClassPair nextElement() {
            try {
                return next();
            } catch (NamingException e) {
                throw new NoSuchElementException("no such element");
            }
        }
    }
    private static class BindingEnumerationImpl implements NamingEnumeration<Binding> {
        Iterator<Map.Entry<Name,Object>> iterator;
        private BindingEnumerationImpl(Map<NameObjectnames) {
             = names.entrySet().iterator();
        }
        @Override
        public Binding next() throws NamingException {
            Map.Entry<Name,Objectelement = .next();
            return new Binding(element.getKey().toString(),element.getValue());
        }
        @Override
        public boolean hasMore() throws NamingException {
            return .hasNext();
        }
        @Override
        public void close() throws NamingException {
        }
        @Override
        public boolean hasMoreElements() {
            return .hasNext();
        }
        @Override
        public Binding nextElement() {
            try {
                return next();
            } catch (NamingException e) {
                throw new NoSuchElementException("no such element");
            }
        }
    }
    private static class LMFNameParser implements NameParser {
        @Override
        public Name parse(String namethrows NamingException {
            return new CompoundName(name,);
        }
    }
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