| /* |
| * 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.felix.dm; |
| |
| /** |
| * Describes a component dependency. They form descriptions of dependencies |
| * that are managed by the dependency manager. They can be used to query their state |
| * for monitoring tools. The dependency manager shell command is an example of |
| * such a tool. |
| * |
| * @author <a href="mailto:dev@felix.apache.org">Felix Project Team</a> |
| */ |
| public interface ComponentDependencyDeclaration { |
| /** Names for the states of this dependency. */ |
| public static final String[] STATE_NAMES = { |
| "optional unavailable", |
| "optional available", |
| "required unavailable", |
| "required available" |
| }; |
| /** State constant for an unavailable, optional dependency. */ |
| public static final int STATE_UNAVAILABLE_OPTIONAL = 0; |
| /** State constant for an available, optional dependency. */ |
| public static final int STATE_AVAILABLE_OPTIONAL = 1; |
| /** State constant for an unavailable, required dependency. */ |
| public static final int STATE_UNAVAILABLE_REQUIRED = 2; |
| /** State constant for an available, required dependency. */ |
| public static final int STATE_AVAILABLE_REQUIRED = 3; |
| /** Returns the name of this dependency. */ |
| public String getName(); |
| /** Returns the name of the type of this dependency. */ |
| public String getType(); |
| /** Returns the state of this dependency. */ |
| public int getState(); |
| } |