/*************************************************************************
* Copyright 2009-2013 Eucalyptus Systems, Inc.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; version 3 of the License.
*
* 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see http://www.gnu.org/licenses/.
*
* Please contact Eucalyptus Systems, Inc., 6755 Hollister Ave., Goleta
* CA 93117, USA or visit http://www.eucalyptus.com/licenses/ if you need
* additional information or have any questions.
************************************************************************/
package com.eucalyptus.auth.policy.condition;
import javax.annotation.Nullable;
/**
* Null condition for checking if a condition key is present
*/
@PolicyCondition( value = NullConditionOp.NAME, conditional = false )
public class NullConditionOp implements ConditionOp {
static final String NAME = "Null";
@Override
public boolean check( @Nullable final String key, final String value ) {
if ( Boolean.valueOf( value.toLowerCase( ) ) ) {
return key == null;
} else {
return key != null;
}
}
}