/*
 * JBoss, Home of Professional Open Source.
 * Copyright 2012, Red Hat, Inc., and individual contributors
 * as indicated by the @author tags. See the copyright.txt file in the
 * distribution for a full listing of individual contributors.
 *
 * 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.jboss.as.controller.operations.global;

import static org.jboss.as.controller.operations.global.GlobalOperationAttributes.NAME;
import static org.jboss.as.controller.operations.global.GlobalOperationAttributes.VALUE;

import org.jboss.as.controller.OperationContext;
import org.jboss.as.controller.OperationDefinition;
import org.jboss.as.controller.OperationFailedException;
import org.jboss.as.controller.OperationStepHandler;
import org.jboss.as.controller.SimpleOperationDefinitionBuilder;
import org.jboss.as.controller.descriptions.ModelDescriptionConstants;
import org.jboss.as.controller.descriptions.common.ControllerResolver;
import org.jboss.dmr.ModelNode;

/**
 * The undefine-attribute handler, writing an undefined value for a single attribute.
 */
public class UndefineAttributeHandler extends WriteAttributeHandler {

    static final OperationDefinition DEFINITION = new SimpleOperationDefinitionBuilder(ModelDescriptionConstants.UNDEFINE_ATTRIBUTE_OPERATION, ControllerResolver.getResolver("global"))
            .setParameters(NAME)
            .build();

    public static final OperationStepHandler INSTANCE = new UndefineAttributeHandler();

    @Override
    public void execute(final OperationContext context, final ModelNode original) throws OperationFailedException {
        final ModelNode operation = original.clone();
        operation.get(VALUE.getName()).set(new ModelNode());
        super.execute(context, operation);
    }

}