| /* |
| * 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.osgi.service.command; |
| |
| import java.lang.annotation.ElementType; |
| import java.lang.annotation.Retention; |
| import java.lang.annotation.RetentionPolicy; |
| import java.lang.annotation.Target; |
| |
| @Retention(RetentionPolicy.RUNTIME) |
| @Target({ElementType.PARAMETER}) |
| public @interface Parameter |
| { |
| static final String UNSPECIFIED = "org.osgi.service.command.unspecified.parameter"; |
| |
| /** |
| * Parameter name and aliases which must start with the hyphen character. |
| * @return parameter names. |
| **/ |
| String[] names(); |
| |
| /** |
| * Optional parameter description. |
| * @return parameter description. |
| **/ |
| String description() default ""; |
| |
| /** |
| * The default value of the parameter if its name is present on the |
| * command line. If this value is specified, then the command parsing |
| * will not expect a value on the command line for this parameter. |
| * If this value is UNSPECIFIED, then an argument must be specified on the |
| * command line for the parameter. |
| * @return default value of the parameter if its name is present on the |
| * command line. |
| **/ |
| String presentValue() default UNSPECIFIED; |
| |
| /** |
| * The default value of the parameter if its name is not present on the |
| * command line. This value is effectively the default value for the |
| * parameter. |
| * @return default value of the parameter if its name is not present |
| * on the command line. |
| **/ |
| String absentValue(); |
| } |