io.micronaut.cli.profile.commands.PicocliCompleter Maven / Gradle / Ivy
/*
* Copyright 2017-2019 original authors
*
* Licensed 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 io.micronaut.cli.profile.commands;
import jline.console.completer.ArgumentCompleter;
import jline.console.completer.Completer;
import picocli.AutoComplete;
import picocli.CommandLine.Model.CommandSpec;
import java.util.List;
/**
* Generates JLine completion candidates based on the
* {@link picocli.CommandLine.Model.ArgSpec#completionCandidates completionCandidates} defined
* on the options and positional parameters of the command (or the enum values of the type if the ArgSpec has an enum type).
*
* @author Remko Popma
* @since 1.0
*/
public class PicocliCompleter implements Completer {
CommandSpec commandSpec;
/**
* Default constructor.
*
* @param spec The command spec
*/
public PicocliCompleter(CommandSpec spec) {
this.commandSpec = spec;
}
@Override
public int complete(String buffer, int cursor, List candidates) {
// use the jline internal parser to split the line into tokens
ArgumentCompleter.ArgumentList list =
new ArgumentCompleter.WhitespaceArgumentDelimiter().delimit(buffer, cursor);
// let picocli generate completion candidates for the token where the cursor is at
return AutoComplete.complete(commandSpec,
list.getArguments(),
list.getCursorArgumentIndex(),
list.getArgumentPosition(),
cursor,
candidates);
}
}