/*
* Copyright (C) 2009 eXo Platform SAS.
*
* This is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 2.1 of
* the License, or (at your option) any later version.
*
* This software is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this software; if not, write to the Free
* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA, or see the FSF site: http://www.fsf.org.
*/
package org.exoplatform.services.naming;
import org.exoplatform.services.jdbc.impl.CloseableDataSource;
import org.exoplatform.services.log.ExoLogger;
import org.exoplatform.services.log.Log;
import java.util.HashMap;
import java.util.Hashtable;
import java.util.Map;
import javax.naming.Binding;
import javax.naming.CompositeName;
import javax.naming.Context;
import javax.naming.InvalidNameException;
import javax.naming.LinkRef;
import javax.naming.Name;
import javax.naming.NameAlreadyBoundException;
import javax.naming.NameClassPair;
import javax.naming.NameNotFoundException;
import javax.naming.NameParser;
import javax.naming.NamingEnumeration;
import javax.naming.NamingException;
import javax.naming.OperationNotSupportedException;
import javax.naming.Reference;
import javax.naming.Referenceable;
import javax.naming.spi.NamingManager;
import javax.sql.DataSource;
/**
* Created by The eXo Platform SAS.
*
* @author <a href="mailto:gennady.azarenkov@exoplatform.com">Gennady
* Azarenkov</a>
* @version $Id: SimpleContext.java 7117 2006-07-17 11:47:46Z peterit $
*/
public class SimpleContext implements Context
{
/**
* The logger
*/
private static final Log LOG = ExoLogger.getLogger("exo.kernel.component.common.SimpleContext");
private static final NameParser NAME_PARSER = new SimpleNameParser();
private static volatile Map<String, Object> BINDINGS = new HashMap<String, Object>();
public SimpleContext()
{
}
protected Map<String, Object> getBindings()
{
return BINDINGS;
}
protected void setBindings(Map<String, Object> bindings)
{
BINDINGS = bindings;
}
/**
* Converts a Name to a flat String.
*/
protected String nameToString(Name name) throws NamingException
{
return name.toString();
}
/**
* {@inheritDoc}
*/
public Object lookup(Name name) throws NamingException
{
return lookup(nameToString(name));
}
/**
* {@inheritDoc}
*/
public Object lookup(String name) throws NamingException
{
if (name.isEmpty())
{
throw new InvalidNameException("Cannot bind empty name");
}
Object obj = getBindings().get(name);
if (obj instanceof Reference)
{
synchronized (obj)
{
obj = getBindings().get(name);
if (obj instanceof Reference)
{
try
{
obj = NamingManager.getObjectInstance(obj, NAME_PARSER.parse(name), this, getInternalEnv());
if (obj instanceof DataSource)
{
obj = new CloseableDataSource((DataSource)obj);
}
// Re-bind with the object with its new value to be able to return the same ins
bindRefValue(name, obj);
}
catch (Exception e)
{
LOG.error(e.getLocalizedMessage(), e);
NamingException ne = new NamingException("getObjectInstance failed");
ne.setRootCause(e);
throw ne;
}
}
}
}
else if (obj == null)
{
throw new NameNotFoundException("No object has been binded with the name '" + name + "'");
}
return obj;
}
/**
* {@inheritDoc}
*/
public void bind(Name name, Object value) throws NamingException
{
bind(nameToString(name), value);
}
/**
* {@inheritDoc}
*/
public void bind(String name, Object value) throws NamingException
{
bind(name, value, true);
}
protected void bind(String name, Object value, boolean checkIfExists) throws NamingException
{
if (name.isEmpty())
{
throw new InvalidNameException("Cannot bind empty name");
}
// Call getStateToBind for using any state factories
value = NamingManager.getStateToBind(value, NAME_PARSER.parse(name), this, getInternalEnv());
if (value instanceof Context)
{
throw new OperationNotSupportedException("Context not supported");
}
else if (value instanceof LinkRef)
{
throw new OperationNotSupportedException("LinkRef not supported");
}
else if (value instanceof Referenceable)
{
value = ((Referenceable)value).getReference();
}
synchronized (getMutex())
{
Map<String, Object> tmpObjects = new HashMap<String, Object>(getBindings());
if (checkIfExists && tmpObjects.containsKey(name))
{
throw new NameAlreadyBoundException("An object has already been binded with the name '" + name + "'");
}
tmpObjects.put(name, value);
setBindings(tmpObjects);
}
}
/**
* {@inheritDoc}
*/
protected void bindRefValue(String name, Object value) throws NamingException
{
}
/**
* {@inheritDoc}
*/
public void rebind(Name name, Object value) throws NamingException
{
rebind(nameToString(name), value);
}
/**
* {@inheritDoc}
*/
public void rebind(String name, Object value) throws NamingException
{
bind(name, value, false);
}
/**
* {@inheritDoc}
*/
public void unbind(Name name) throws NamingException
{
unbind(nameToString(name));
}
/**
* {@inheritDoc}
*/
public void unbind(String name) throws NamingException
{
if (name.isEmpty())
{
throw new InvalidNameException("Cannot bind empty name");
}
synchronized (getMutex())
{
Map<String, Object> tmpObjects = new HashMap<String, Object>(getBindings());
if (tmpObjects.remove(name) == null)
{
throw new NameNotFoundException("No object has been binded with the name '" + name + "'");
}
setBindings(tmpObjects);
}
}
/**
* {@inheritDoc}
*/
public void rename(Name name1, Name name2) throws NamingException
{
rename(nameToString(name1), nameToString(name2));
}
/**
* {@inheritDoc}
*/
public void rename(String name1, String name2) throws NamingException
{
if (name1.isEmpty() || name2.isEmpty())
{
throw new InvalidNameException("Cannot bind empty name");
}
Object value;
synchronized (getMutex())
{
Map<String, Object> tmpObjects = new HashMap<String, Object>(getBindings());
if (tmpObjects.containsKey(name2))
{
throw new NameAlreadyBoundException("An object has already been binded with the name '" + name2 + "'");
}
else if ((value = tmpObjects.remove(name1)) == null)
{
throw new NameNotFoundException("No object has been binded with the name '" + name1 + "'");
}
tmpObjects.put(name2, value);
setBindings(tmpObjects);
}
}
/**
* {@inheritDoc}
*/
public NamingEnumeration<NameClassPair> list(Name name) throws NamingException
{
throw new OperationNotSupportedException("Not supported");
}
/**
* {@inheritDoc}
*/
public NamingEnumeration<NameClassPair> list(String name) throws NamingException
{
throw new OperationNotSupportedException("Not supported");
}
/**
* {@inheritDoc}
*/
public NamingEnumeration<Binding> listBindings(Name name) throws NamingException
{
throw new OperationNotSupportedException("Not supported");
}
/**
* {@inheritDoc}
*/
public NamingEnumeration<Binding> listBindings(String name) throws NamingException
{
throw new OperationNotSupportedException("Not supported");
}
/**
* {@inheritDoc}
*/
public void destroySubcontext(Name name) throws NamingException
{
throw new OperationNotSupportedException("Not supported");
}
/**
* {@inheritDoc}
*/
public void destroySubcontext(String name) throws NamingException
{
throw new OperationNotSupportedException("Not supported");
}
/**
* {@inheritDoc}
*/
public Context createSubcontext(Name name) throws NamingException
{
throw new OperationNotSupportedException("Not supported");
}
/**
* {@inheritDoc}
*/
public Context createSubcontext(String name) throws NamingException
{
throw new OperationNotSupportedException("Not supported");
}
/**
* {@inheritDoc}
*/
public Object lookupLink(Name name) throws NamingException
{
throw new OperationNotSupportedException("Not supported");
}
/**
* {@inheritDoc}
*/
public Object lookupLink(String name) throws NamingException
{
throw new OperationNotSupportedException("Not supported");
}
/**
* {@inheritDoc}
*/
public NameParser getNameParser(Name name) throws NamingException
{
return getNameParser(nameToString(name));
}
/**
* {@inheritDoc}
*/
public NameParser getNameParser(String name) throws NamingException
{
return NAME_PARSER;
}
/**
* {@inheritDoc}
*/
public Name composeName(Name nam1, Name name2) throws NamingException
{
throw new OperationNotSupportedException("Not supported");
}
/**
* {@inheritDoc}
*/
public String composeName(String name1, String name2) throws NamingException
{
throw new OperationNotSupportedException("Not supported");
}
/**
* {@inheritDoc}
*/
public Object addToEnvironment(String name1, Object name2) throws NamingException
{
throw new OperationNotSupportedException("Not supported");
}
/**
* {@inheritDoc}
*/
public Object removeFromEnvironment(String name) throws NamingException
{
throw new OperationNotSupportedException("Not supported");
}
/**
* {@inheritDoc}
*/
@SuppressWarnings("rawtypes")
public Hashtable<?, ?> getEnvironment() throws NamingException
{
return new Hashtable(3, 0.75f);
}
protected Hashtable<?, ?> getInternalEnv()
{
return null;
}
protected Object getMutex()
{
return SimpleContext.class;
}
/**
* {@inheritDoc}
*/
public void close() throws NamingException
{
}
/**
* {@inheritDoc}
*/
public String getNameInNamespace() throws NamingException
{
throw new OperationNotSupportedException("Not supported");
}
private static class SimpleNameParser implements NameParser
{
/**
* {@inheritDoc}
*/
public Name parse(String name) throws NamingException
{
return new CompositeName(name);
}
}
}