/*
* 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.karaf.shell.impl.action.command;
import java.util.List;
import org.apache.karaf.shell.api.action.Action;
import org.apache.karaf.shell.api.action.Command;
import org.apache.karaf.shell.api.console.CommandLine;
import org.apache.karaf.shell.api.console.Completer;
import org.apache.karaf.shell.api.console.Session;
public class ActionCommand implements org.apache.karaf.shell.api.console.Command {
private final ManagerImpl manager;
private final Class<? extends Action> actionClass;
public ActionCommand(ManagerImpl manager, Class<? extends Action> actionClass) {
this.manager = manager;
this.actionClass = actionClass;
}
public Class<? extends Action> getActionClass() {
return actionClass;
}
@Override
public String getScope() {
return actionClass.getAnnotation(Command.class).scope();
}
@Override
public String getName() {
return actionClass.getAnnotation(Command.class).name();
}
@Override
public String getDescription() {
return actionClass.getAnnotation(Command.class).description();
}
@Override
public Completer getCompleter(boolean scoped) {
return new ArgumentCompleter(this, scoped);
}
protected Completer getCompleter(Class<?> clazz) {
return new DelayedCompleter(clazz);
}
@Override
public Object execute(Session session, List<Object> arguments) throws Exception {
Action action = createNewAction(session);
try {
if (new DefaultActionPreparator().prepare(action, session, arguments)) {
return action.execute();
}
} finally {
releaseAction(action);
}
return null;
}
protected Action createNewAction(Session session) {
try {
return manager.instantiate(actionClass, session.getRegistry());
} catch (Exception e) {
throw new RuntimeException("Unable to creation command action " + actionClass.getName(), e);
}
}
protected void releaseAction(Action action) throws Exception {
manager.release(action);
}
public static class DelayedCompleter implements Completer {
private final Class<?> clazz;
public DelayedCompleter(Class<?> clazz) {
this.clazz = clazz;
}
@Override
public int complete(Session session, CommandLine commandLine, List<String> candidates) {
Object service = session.getRegistry().getService(clazz);
if (service instanceof Completer) {
return ((Completer) service).complete(session, commandLine, candidates);
}
return -1;
}
}
}