/*
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
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 * or glassfish/bootstrap/legal/LICENSE.txt.  See the License for the specific
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 * 
 * When distributing the software, include this License Header Notice in each
 * file and include the License file at glassfish/bootstrap/legal/LICENSE.txt.
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/*
 * $Header: /cvs/glassfish/admin/mbeans/src/java/com/sun/enterprise/admin/dottedname/DottedNameRegistry1To1Impl.java,v 1.5 2007/05/05 05:24:07 tcfujii Exp $
 * $Revision: 1.5 $
 * $Date: 2007/05/05 05:24:07 $
 */
package com.sun.enterprise.admin.dottedname;
 
 
import java.util.Set;
import java.util.HashSet;
import java.util.Iterator;
import java.util.HashMap;

import javax.management.ObjectName;

/*
	While a dotted name can refer to only 1 ObjectName, an ObjectName could
	be aliased to multiple dotted names.
	
	This implementation supports a 1 to 1 mapping each way; it cannot be used
	to map multiple dotted names to the same ObjectName.
 */
public final class DottedNameRegistry1To1Impl implements DottedNameRegistry
{
	final HashMap		mDottedNameStringsToObjectNames;
	
	final HashMap		mObjectNamesToDottedNameStrings;
	
	private final static int	INITIAL_CAPACITY	= 300;
	
		public
	DottedNameRegistry1To1Impl( )
	{
		/*
		 	Keep mappings both ways to allow efficient removal
		 	based on either.
		*/
		mDottedNameStringsToObjectNames		= new HashMap( INITIAL_CAPACITY );
		mObjectNamesToDottedNameStrings		= new HashMap( INITIAL_CAPACITY );
	}
	
		public synchronized ObjectName
	dottedNameToObjectName( String dottedName )
	{
		return( (ObjectName)mDottedNameStringsToObjectNames.get( dottedName ) );
	}
	
		public synchronized String
	objectNameToDottedName( ObjectName objectName )
	{
		return( (String)mObjectNamesToDottedNameStrings.get( objectName ) );
	}
	
		private Set
	copySet( Set input )
	{
		final HashSet	newSet	= new HashSet();
		
		newSet.addAll( input );
		
		return( newSet );
	}
	
		public synchronized Set
	allDottedNameStrings(  )
	{
		return( copySet( mDottedNameStringsToObjectNames.keySet() ) );
	}
	
		public synchronized Set
	allObjectNames(  )
	{
		return( copySet( mObjectNamesToDottedNameStrings.keySet() ) );
	}

		public synchronized void
	add( String dottedName, ObjectName objectName ) 
	{
        new DottedName( dottedName );
		/*
			Don't allow more than one dotted name mapping for an ObjectName.
			
			The check here must be via the ObjectName; checking the dottedName
			will do no good as this could be a new dottedName for the same
			ObjectName.
		 */
		if ( objectNameToDottedName( objectName ) != null )
		{
			remove( objectName );
		}

		mDottedNameStringsToObjectNames.put( dottedName, objectName );
		mObjectNamesToDottedNameStrings.put( objectName, dottedName );
	}
	
		synchronized void
	remove( String dottedName, ObjectName objectName )
	{
		if ( dottedName != null && objectName != null )
		{
			mDottedNameStringsToObjectNames.remove( dottedName );
			mObjectNamesToDottedNameStrings.remove( objectName );
		}
	}
	
		public void
	remove( String dottedName )
	{
		remove( dottedName, dottedNameToObjectName( dottedName ) );
	}
	
		public void
	remove( ObjectName objectName )
	{
		remove( objectNameToDottedName( objectName ), objectName );
	}
}