/*
* Copyright (c) 2002-2009 "Neo Technology,"
* Network Engine for Objects in Lund AB [http://neotechnology.com]
*
* This file is part of Neo4j.
*
* Neo4j is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as
* published by the Free Software Foundation, either version 3 of the
* License, or (at your option) any later version.
*
* This program 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 Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package org.neo4j.shell.kernel.apps;
import java.rmi.RemoteException;
import org.neo4j.shell.AppCommandParser;
import org.neo4j.shell.Output;
import org.neo4j.shell.Session;
import org.neo4j.shell.ShellException;
/**
* Mimics the POSIX application with the same name, i.e. removes a property from
* a node or relationship. It could also (regarding POSIX) delete nodes,
* but it doesn't.
*/
public class Rm extends GraphDatabaseApp
{
@Override
public String getDescription()
{
return "Removes a property from the current node or relationship.\n" +
"Usage: rm <key>";
}
@Override
protected String exec( AppCommandParser parser, Session session,
Output out ) throws ShellException
{
if ( parser.arguments().isEmpty() )
{
throw new ShellException( "Must supply the property key to " +
"remove, like: rm title" );
}
try
{
String key = parser.arguments().get( 0 );
NodeOrRelationship thing = getCurrent( session );
if ( thing.removeProperty( key ) == null )
{
out.println( "Property '" + key + "' not found" );
}
return null;
}
catch ( RemoteException e )
{
throw new ShellException( e );
}
}
}