/*
* 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.api.console;
import java.util.ArrayList;
import java.util.List;
/**
* A <code>Completer</code> is used by the console to complete the command line.
*/
public interface Completer {
/**
* populate possible completion candidates.
*
* @param session the current {@link Session}
* @param commandLine the pre-parsed {@link CommandLine}
* @param candidates a list to fill with possible completion candidates
* @return the index of the{@link CommandLine} for which the completion will be relative
*/
int complete(Session session, CommandLine commandLine, List<String> candidates);
default void completeCandidates(Session session, CommandLine commandLine, List<Candidate> candidates) {
List<String> strings = new ArrayList<>();
int idx = complete(session, commandLine, strings);
String word = "";
if (idx > commandLine.getBufferPosition() - commandLine.getArgumentPosition()) {
word = commandLine.getBuffer().substring(commandLine.getBufferPosition() - commandLine.getArgumentPosition(), idx);
}
for (String string : strings) {
String str = word + string;
if (str.endsWith(" ")) {
candidates.add(new Candidate(str.substring(0, str.length() - 1), true));
} else {
candidates.add(new Candidate(word + string, false));
}
}
}
}