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/**
 * Copyright 2012 OW2 Shelbie
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.ow2.shelbie.commands.builtin.internal;

import org.apache.felix.gogo.commands.Action;
import org.apache.felix.gogo.commands.Argument;
import org.apache.felix.gogo.commands.Command;
import org.apache.felix.gogo.commands.Option;
import org.apache.felix.ipojo.annotations.Component;
import org.apache.felix.ipojo.annotations.HandlerDeclaration;
import org.apache.felix.service.command.CommandSession;

/**
 * Created by IntelliJ IDEA.
 * User: sauthieg
 * Date: 7 janv. 2010
 * Time: 11:30:28
 * To change this template use File | Settings | File Templates.
 */
@Component
@Command(name = "unset",
         scope = "shelbie",
         description = "Unset the value from a variable (remove it)")
@HandlerDeclaration("")
public class UnsetAction implements Action {

    @Option(name = "-v",
            aliases = "--verbose",
            description = "Verbose mode")
    private boolean verbose = false;

    @Argument(required = true,
              description = "The variable to remove")
    private String variableName;

    public Object execute(final CommandSession session) throws Exception {
        session.put(variableName, null);
        return null;
    }
}