/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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.apache.geronimo.gshell.commands.builtins;
import java.util.List;
import org.apache.geronimo.gshell.DefaultVariables;
import org.apache.geronimo.gshell.clp.Argument;
import org.apache.geronimo.gshell.clp.Option;
import org.apache.geronimo.gshell.command.Variables;
import org.apache.geronimo.gshell.command.annotation.CommandComponent;
import org.apache.geronimo.gshell.support.OsgiCommandSupport;
/**
* Unset a variable or property.
*
* @version $Rev: 593392 $ $Date: 2007-11-09 03:14:15 +0100 (Fri, 09 Nov 2007) $
*/
@CommandComponent(id="gshell-builtins:unset", description="Unset a variable")
public class UnsetCommand
extends OsgiCommandSupport
{
enum Mode
{
VARIABLE,
PROPERTY
}
@Option(name="-m", aliases={"--mode"}, description="Unset mode")
private Mode mode = Mode.VARIABLE;
@Argument(required=true, description="Variable name")
private List<String> args;
protected Object doExecute() throws Exception {
for (String arg : args) {
String namevalue = String.valueOf(arg);
switch (mode) {
case PROPERTY:
unsetProperty(namevalue);
break;
case VARIABLE:
unsetVariable(namevalue);
break;
}
}
return SUCCESS;
}
private void ensureIsIdentifier(final String name) {
if (!DefaultVariables.isIdentifier(name)) {
throw new RuntimeException("Invalid identifer name: " + name);
}
}
private void unsetProperty(final String name) {
log.info("Unsetting system property: {}", name);
ensureIsIdentifier(name);
System.getProperties().remove(name);
}
private void unsetVariable(final String name) {
log.info("Unsetting variable: {}", name);
ensureIsIdentifier(name);
// Command vars always has a parent, set only makes sence when setting in parent's scope
Variables vars = variables.parent();
vars.unset(name);
}
}