/*
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
 * 
 * Copyright 1997-2007 Sun Microsystems, Inc. All rights reserved.
 * 
 * The contents of this file are subject to the terms of either the GNU
 * General Public License Version 2 only ("GPL") or the Common Development
 * and Distribution License("CDDL") (collectively, the "License").  You
 * may not use this file except in compliance with the License. You can obtain
 * a copy of the License at https://glassfish.dev.java.net/public/CDDL+GPL.html
 * or glassfish/bootstrap/legal/LICENSE.txt.  See the License for the specific
 * language governing permissions and limitations under the License.
 * 
 * When distributing the software, include this License Header Notice in each
 * file and include the License file at glassfish/bootstrap/legal/LICENSE.txt.
 * Sun designates this particular file as subject to the "Classpath" exception
 * as provided by Sun in the GPL Version 2 section of the License file that
 * accompanied this code.  If applicable, add the following below the License
 * Header, with the fields enclosed by brackets [] replaced by your own
 * identifying information: "Portions Copyrighted [year]
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 * 
 * If you wish your version of this file to be governed by only the CDDL or
 * only the GPL Version 2, indicate your decision by adding "[Contributor]
 * elects to include this software in this distribution under the [CDDL or GPL
 * Version 2] license."  If you don't indicate a single choice of license, a
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 * its licensees as provided above.  However, if you add GPL Version 2 code
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/*
 * $Header: /cvs/glassfish/admin-cli/cli-api/src/java/com/sun/cli/jmx/cmd/TargetCmd.java,v 1.4 2007/05/05 05:24:50 tcfujii Exp $
 * $Revision: 1.4 $
 * $Date: 2007/05/05 05:24:50 $
 */
 
package com.sun.cli.jmx.cmd;

import javax.management.ObjectName;

import com.sun.cli.util.stringifier.ArrayStringifier;

/*
	Invokes the 'list' commmand on all specified targets
 */
public class TargetCmd extends JMXCmd
{
		public
	TargetCmd( final CmdEnv env )
	{
		super( env );
	}
	
		int
	getNumRequiredOperands()
	{
		// require 1, by default
		return( 0 );
	}
	
		public String
	getUsage()
	{
		return( CmdStrings.TARGET_HELP.toString() );
	}
	
	
		void
	displayExistingTarget()
	{
		println( "Targets:\n" +  envGet( ENV_TARGET ) );
	}
	
		public static String []
	getNames( )
	{
		return( new String [] { "target", "t" } );
	}
	
		void
	warnEmptyTargets( final String [] targets )
		throws Exception
	{
		// issue warning if some targets could not be resolved to anything
		for ( int i = 0; i < targets.length; ++i )
		{
			final String	target	= targets[ i ];
			
			final ObjectName []	objects	=
				getProxy().resolveTargets( new String [] { target } );
				
			if ( objects.length == 0 )
			{
				println( "WARNING: target " +
					target + " does not resolve to any objects" );
			}
		}
	}
	
		void
	setTargets( final String [] targets )
		throws Exception
	{
		putEnvTargets( targets );
		warnEmptyTargets( targets );
	}
	
		void
	executeInternal()
		throws Exception
	{
		final String [] operands	= getOperands();
		
		assert( operands != null );
		
		if ( operands.length == 0 )
		{
			displayExistingTarget();
		}
		else
		{
			establishProxy();
			setTargets( operands );
		}
	}
}