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Elasticsearch subproject :server
/*
* Licensed to Elasticsearch under one or more contributor
* license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright
* ownership. Elasticsearch 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.elasticsearch.cli;
import java.util.Arrays;
import java.util.LinkedHashMap;
import java.util.Map;
import joptsimple.NonOptionArgumentSpec;
import joptsimple.OptionSet;
/**
* A cli tool which is made up of multiple subcommands.
*/
public class MultiCommand extends Command {
protected final Map subcommands = new LinkedHashMap<>();
private final NonOptionArgumentSpec arguments = parser.nonOptions("command");
public MultiCommand(String description) {
super(description);
parser.posixlyCorrect(true);
}
@Override
protected void printAdditionalHelp(Terminal terminal) {
if (subcommands.isEmpty()) {
throw new IllegalStateException("No subcommands configured");
}
terminal.println("Commands");
terminal.println("--------");
for (Map.Entry subcommand : subcommands.entrySet()) {
terminal.println(subcommand.getKey() + " - " + subcommand.getValue().description);
}
terminal.println("");
}
@Override
protected void execute(Terminal terminal, OptionSet options) throws Exception {
if (subcommands.isEmpty()) {
throw new IllegalStateException("No subcommands configured");
}
String[] args = arguments.values(options).toArray(new String[0]);
if (args.length == 0) {
throw new UserException(ExitCodes.USAGE, "Missing command");
}
Command subcommand = subcommands.get(args[0]);
if (subcommand == null) {
throw new UserException(ExitCodes.USAGE, "Unknown command [" + args[0] + "]");
}
subcommand.mainWithoutErrorHandling(Arrays.copyOfRange(args, 1, args.length), terminal);
}
}